Quarterly report pursuant to Section 13 or 15(d)

Pension and Other Postretirement Benefit Plans (Details)

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Pension and Other Postretirement Benefit Plans (Details) (USD $)
In Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Pension [Member]
        
Net periodic benefit cost [Abstract]        
Service cost $ 1,237 $ 1,078 $ 3,711 $ 3,234
Interest cost 1,867 1,853 5,601 5,559
Expected return on plan assets (1,843) (1,717) (5,529) (5,151)
Amortization of prior service cost 6 (10) 18 (30)
Amortization of net actuarial loss 1,338 1,338 4,014 4,014
Net benefit cost 2,605 2,542 7,815 7,626
Other Postretirement [Member]
        
Net periodic benefit cost [Abstract]        
Service cost 158 173 474 519
Interest cost 313 346 939 1,038
Expected return on plan assets 0 0 0 0
Amortization of prior service cost (119) (181) (357) (543)
Amortization of net actuarial loss 102 130 306 390
Net benefit cost 454 468 1,362 1,404
Contributions during the nine months ended June 30, 2011:        
Other postretirement plan     772  
Additional contributions expected in fiscal 2011:        
Additional benefit plan contribution for the remainder of fiscal 2011 321   321  
Supplemental Retirement [Member]
        
Contributions during the nine months ended June 30, 2011:        
Supplemental retirement plan     559  
Additional contributions expected in fiscal 2011:        
Additional benefit plan contribution for the remainder of fiscal 2011 $ 206   $ 206