ACCUMULATED OTHER COMPREHENSIVE INCOME - Reclassifications out of AOCI (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2014 |
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| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] | |||
| Income before income tax | $ 95,234 | $ 89,652 | $ 66,076 |
| Income taxes | (29,073) | (26,364) | (22,805) |
| Interest expense | (24,344) | (20,610) | (12,628) |
| Net income | 66,161 | $ 63,288 | $ 43,271 |
| Postretirement Benefit Plans | Reclassification out of Accumulated Other Comprehensive Income | |||
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] | |||
| Prior service (cost) credit | 378 | ||
| Actuarial losses | (7,468) | ||
| Income before income tax | (7,090) | ||
| Income taxes | (2,765) | ||
| Net income | (4,325) | ||
| Derivatives | Reclassification out of Accumulated Other Comprehensive Income | |||
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] | |||
| Income before income tax | (3,146) | ||
| Income taxes | (1,227) | ||
| Interest expense | (3,146) | ||
| Net income | $ (1,919) | ||
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- Definition Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before tax of cost (credit) of benefit changes attributable to plan participants' prior service resulting from a plan amendment or plan initiation that has not been recognized in net periodic benefit cost (credit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before tax of (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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