PENSION AND OTHER POSTRETIREMENT PLANS (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Sep. 30, 2014 |
Sep. 30, 2013 |
Sep. 30, 2012 |
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
$ 131,753
|
$ 123,713
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
131,753
|
123,713
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
131,753
|
123,713
|
|
| Level 1 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
106,940
|
93,964
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
106,940
|
93,964
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
106,940
|
93,964
|
|
| Level 2 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
10,483
|
10,807
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
10,483
|
10,807
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
10,483
|
10,807
|
|
| Level 3 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
14,330
|
18,942
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
14,330
|
18,942
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
14,330
|
18,942
|
|
| Equity Securities - Stocks [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
35,310
|
36,127
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
35,310
|
36,127
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
35,310
|
36,127
|
|
| Equity Securities - Stocks [Member] | Level 1 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
35,310
|
36,127
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
35,310
|
36,127
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
35,310
|
36,127
|
|
| Equity Securities - Stocks [Member] | Level 2 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
0
|
0
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Equity Securities - Stocks [Member] | Level 3 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
0
|
0
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Equity Securities - Mutual Funds [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
31,674
|
31,827
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
31,674
|
31,827
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
31,674
|
31,827
|
|
| Equity Securities - Mutual Funds [Member] | Level 1 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
30,694
|
30,507
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
30,694
|
30,507
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
30,694
|
30,507
|
|
| Equity Securities - Mutual Funds [Member] | Level 2 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
980
|
1,320
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
980
|
1,320
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
980
|
1,320
|
|
| Equity Securities - Mutual Funds [Member] | Level 3 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
0
|
0
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Fixed Income Securities [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
29,545
|
27,399
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
29,545
|
27,399
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
29,545
|
27,399
|
|
| Fixed Income Securities [Member] | Level 1 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
20,042
|
17,912
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
20,042
|
17,912
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
20,042
|
17,912
|
|
| Fixed Income Securities [Member] | Level 2 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
9,503
|
9,487
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
9,503
|
9,487
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
9,503
|
9,487
|
|
| Fixed Income Securities [Member] | Level 3 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
0
|
0
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Cash and Cash Equivalents [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
14,796
|
9,418
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
14,796
|
9,418
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
14,796
|
9,418
|
|
| Cash and Cash Equivalents [Member] | Level 1 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
14,796
|
9,418
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
14,796
|
9,418
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
14,796
|
9,418
|
|
| Cash and Cash Equivalents [Member] | Level 2 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
0
|
0
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Cash and Cash Equivalents [Member] | Level 3 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
0
|
0
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Other Investments [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
20,428
|
18,942
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
20,428
|
18,942
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
20,428
|
18,942
|
|
| Other Investments [Member] | Level 1 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
6,098
|
0
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
6,098
|
0
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
6,098
|
0
|
|
| Other Investments [Member] | Level 2 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
0
|
0
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
0
|
|
| Other Investments [Member] | Level 3 [Member] |
|
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, end of year |
14,330
|
18,942
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
14,330
|
18,942
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
14,330
|
18,942
|
|
| Principal Retirement Plan [Member] |
|
|
|
| Contributions during fiscal 2013: |
|
|
|
| Pension contributions |
3,000
|
|
|
| Other postretirement contributions |
0
|
|
|
| Supplemental Retirement Plan [Member] |
|
|
|
| Contributions during fiscal 2013: |
|
|
|
| Pension contributions |
725
|
|
|
| Other postretirement contributions |
0
|
|
|
| Pension Plans [Member] |
|
|
|
| Change in benefit obligation [Roll Forward] |
|
|
|
| Benefit obligation, beginning of year |
186,077
|
195,860
|
|
| Acquisitions |
0
|
9,437
|
|
| Service cost |
6,150
|
7,160
|
$ 5,852
|
| Interest cost |
8,927
|
8,024
|
7,842
|
| Actuarial (gain) loss |
18,412
|
(27,179)
|
|
| Exchange (gain) loss |
(703)
|
0
|
|
| Benefit payments |
(7,827)
|
(7,225)
|
|
| Benefit obligation, end of year |
211,036
|
186,077
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, beginning of year |
123,713
|
116,577
|
|
| Acquisitions |
0
|
9,437
|
|
| Actual return |
10,792
|
10,838
|
|
| Benefit payments |
(7,827)
|
(7,225)
|
|
| Employer contributions |
5,075
|
3,523
|
|
| Fair value, end of year |
131,753
|
123,713
|
|
| Funded status |
(79,283)
|
(62,363)
|
|
| Unrecognized actuarial loss (gain) |
69,153
|
56,148
|
|
| Unrecognized prior service cost |
(1,411)
|
(1,935)
|
|
| Net amount recognized |
(11,541)
|
(8,150)
|
|
| Amounts recognized in the consolidated balance sheet: |
|
|
|
| Current liability |
(733)
|
(721)
|
|
| Noncurrent benefit liability |
(78,550)
|
(61,642)
|
|
| Accumulated other comprehensive loss |
67,742
|
54,213
|
|
| Net amount recognized |
(11,541)
|
(8,150)
|
|
| Amounts recognized in accumulated other comprehensive loss: |
|
|
|
| Net actuarial loss (income) |
69,153
|
56,148
|
|
| Prior service cost |
(1,411)
|
(1,935)
|
|
| Net amount recognized |
67,742
|
54,213
|
|
| Accumulated benefit obligations in excess of plan assets [Abstract] |
|
|
|
| Accumulated benefit obligation |
180,265
|
156,661
|
|
| Projected benefit obligation |
211,036
|
186,077
|
|
| Net periodic benefit cost [Abstract] |
|
|
|
| Service cost |
6,150
|
7,160
|
5,852
|
| Interest cost |
8,927
|
8,024
|
7,842
|
| Expected return on plan assets |
(9,666)
|
(9,071)
|
(7,836)
|
| Amortization: |
|
|
|
| Prior service cost |
(206)
|
(206)
|
(45)
|
| Net actuarial loss |
3,927
|
7,903
|
6,814
|
| Net benefit cost |
9,132
|
$ 13,810
|
$ 12,627
|
| Amounts of AOCI expected to be recognized in net periodic benefit costs [Abstract] |
|
|
|
| Net actuarial loss |
6,258
|
|
|
| Prior service cost |
$ (180)
|
|
|
| Weighted-average assumptions [Abstract] |
|
|
|
| Discount rate (in hundredths) |
4.25%
|
5.00%
|
4.00%
|
| Return on plan assets (in hundredths) |
7.75%
|
8.00%
|
8.00%
|
| Compensation increase (in hundredths) |
3.50%
|
3.50%
|
3.50%
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Equity securities |
$ 66,984
|
$ 67,954
|
|
| Fixed income, cash and cash equivalents |
44,341
|
36,817
|
|
| Other investments |
20,428
|
18,942
|
|
| Fair value of plan assets |
$ 131,753
|
$ 123,713
|
|
| Target allocation [Abstract] |
|
|
|
| Equity securities (in hundredths) |
55.00%
|
|
|
| Fixed income, cash and cash equivalents (in hundredths) |
30.00%
|
|
|
| Other investments (in hundredths) |
15.00%
|
|
|
| Total target asset allocation (in hundredths) |
100.00%
|
|
|
| Cash included in plan assets (in hundredths) |
2.00%
|
2.00%
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
$ 131,753
|
$ 123,713
|
|
| Benefit payments expected to be paid [Abstract] |
|
|
|
| 2015 |
7,747
|
|
|
| 2016 |
8,116
|
|
|
| 2017 |
8,550
|
|
|
| 2018 |
9,039
|
|
|
| 2019 |
9,611
|
|
|
| 2020-2024 |
57,292
|
|
|
| Total benefits expected to be paid |
100,355
|
|
|
| Effect of one-percentage point change in assumed health care cost trend rates [Abstract] |
|
|
|
| Withdrawal liability |
30,423
|
|
|
| Expected annual payments of multi-employer pension obligation |
1,973
|
|
|
| Pension Plans [Member] | Other Investments [Member] | Level 3 [Member] |
|
|
|
| Change in benefit obligation [Roll Forward] |
|
|
|
| Acquisitions |
0
|
0
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, beginning of year |
18,942
|
18,173
|
|
| Acquisitions |
0
|
0
|
|
| Dispositions |
(5,439)
|
0
|
|
| Realized Gains (Losses) |
1,118
|
48
|
|
| Unrealized Gains |
(291)
|
721
|
|
| Fair value, end of year |
14,330
|
18,942
|
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
14,330
|
18,942
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
14,330
|
18,942
|
|
| Other Postretirement Plans [Member] |
|
|
|
| Change in benefit obligation [Roll Forward] |
|
|
|
| Benefit obligation, beginning of year |
18,881
|
28,831
|
|
| Acquisitions |
0
|
0
|
|
| Service cost |
436
|
796
|
$ 730
|
| Interest cost |
919
|
1,129
|
1,283
|
| Actuarial (gain) loss |
1,929
|
(11,124)
|
|
| Exchange (gain) loss |
0
|
0
|
|
| Benefit payments |
(807)
|
(751)
|
|
| Benefit obligation, end of year |
21,358
|
18,881
|
|
| Change in plan assets [Roll Forward] |
|
|
|
| Fair value, beginning of year |
0
|
0
|
|
| Acquisitions |
0
|
0
|
|
| Actual return |
0
|
0
|
|
| Benefit payments |
(807)
|
(751)
|
|
| Employer contributions |
807
|
751
|
|
| Fair value, end of year |
0
|
0
|
|
| Funded status |
(21,358)
|
(18,881)
|
|
| Unrecognized actuarial loss (gain) |
(987)
|
(3,001)
|
|
| Unrecognized prior service cost |
(1,306)
|
(1,502)
|
|
| Net amount recognized |
(23,651)
|
(23,384)
|
|
| Amounts recognized in the consolidated balance sheet: |
|
|
|
| Current liability |
(1,007)
|
(925)
|
|
| Noncurrent benefit liability |
(20,351)
|
(17,956)
|
|
| Accumulated other comprehensive loss |
(2,293)
|
(4,503)
|
|
| Net amount recognized |
(23,651)
|
(23,384)
|
|
| Amounts recognized in accumulated other comprehensive loss: |
|
|
|
| Net actuarial loss (income) |
(987)
|
(3,001)
|
|
| Prior service cost |
(1,306)
|
(1,502)
|
|
| Net amount recognized |
(2,293)
|
(4,503)
|
|
| Net periodic benefit cost [Abstract] |
|
|
|
| Service cost |
436
|
796
|
730
|
| Interest cost |
919
|
1,129
|
1,283
|
| Expected return on plan assets |
0
|
0
|
0
|
| Amortization: |
|
|
|
| Prior service cost |
(195)
|
(272)
|
(451)
|
| Net actuarial loss |
(87)
|
439
|
535
|
| Net benefit cost |
1,073
|
$ 2,092
|
$ 2,097
|
| Contributions during fiscal 2013: |
|
|
|
| Pension contributions |
0
|
|
|
| Other postretirement contributions |
807
|
|
|
| Amounts of AOCI expected to be recognized in net periodic benefit costs [Abstract] |
|
|
|
| Net actuarial loss |
0
|
|
|
| Prior service cost |
$ (195)
|
|
|
| Weighted-average assumptions [Abstract] |
|
|
|
| Discount rate (in hundredths) |
4.25%
|
5.00%
|
4.00%
|
| Return on plan assets (in hundredths) |
0.00%
|
0.00%
|
0.00%
|
| Compensation increase (in hundredths) |
0.00%
|
0.00%
|
0.00%
|
| Weighted average asset allocation [Abstract] |
|
|
|
| Fair value of plan assets |
$ 0
|
$ 0
|
|
| Fair value of plan assets [Abstract] |
|
|
|
| Fair value of plan assets |
0
|
$ 0
|
|
| Benefit payments expected to be paid [Abstract] |
|
|
|
| 2015 |
1,007
|
|
|
| 2016 |
1,098
|
|
|
| 2017 |
1,205
|
|
|
| 2018 |
1,282
|
|
|
| 2019 |
1,347
|
|
|
| 2020-2024 |
6,847
|
|
|
| Total benefits expected to be paid |
$ 12,786
|
|
|
| Assumed health care cost trend rates [Abstract] |
|
|
|
| Per capita cost of health care benefits assumed for next fiscal year (in hundredths) |
7.00%
|
|
|
| Ultimate health care cost trend rate (in hundredths) |
4.00%
|
|
|
| Year that rate reaches ultimate trend rate |
2069
|
|
|
| Effect of one-percentage point change in assumed health care cost trend rates [Abstract] |
|
|
|
| Effect of one percentage point increase on accumulated postretirement benefit obligation |
$ 1,053
|
|
|
| Effect of one percentage point increase on service and interest cost components |
71
|
|
|
| Effect of one percentage point decrease on accumulated postretirement benefit obligation |
926
|
|
|
| Effect of one percentage point decrease on service and interest cost components |
62
|
|
|
| Other Retirement Plans [Member] |
|
|
|
| Contributions during fiscal 2013: |
|
|
|
| Pension contributions |
$ 1,350
|
|
|