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EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category - USD ($) $ in Thousands | Sep. 30, 2016 | Sep. 30, 2015
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EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | $ 144,316 | $ 144,625
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 84,889 | 60,403
Significant Other Observable Inputs (Level 2) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 59,427 | 84,222
Significant Unobservable Inputs (Level 3) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | 0
Cash and equivalents [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 26,008 | 1,370
Cash and equivalents [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 26,008 | 1,370
Cash and equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | 0
Cash and equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | 0
Short-term investment funds [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 |
Short-term investment funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 |
Short-term investment funds [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 |
Short-term investment funds [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 |
Government agency securities [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 |
Government agency securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 |
Government agency securities [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 |
Government agency securities [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 |
Debt instruments [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 14,122 | 14,291
Debt instruments [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 14,122 | 14,291
Debt instruments [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | 0
Debt instruments [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | 0
Equity securities [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 44,759 | 44,742
Equity securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 44,759 | 44,742
Equity securities [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | 0
Equity securities [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | 0
Commingled funds [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 53,703 | 78,490
Commingled funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | 0
Commingled funds [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 53,703 | 78,490
Commingled funds [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | 0
Limited partnerships and hedge fund investments [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 5,724 | 5,732
Limited partnerships and hedge fund investments [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 0 | 0
Limited partnerships and hedge fund investments [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | 5,724 | 5,732
Limited partnerships and hedge fund investments [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
EMPLOYEE BENEFIT PLANS (Details) - Pension and post-retirement plan assets by asset category [Line Items] |  |
Defined Benefit Plan, Fair Value of Plan Assets | $ 0 | $ 0

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- References No definition available. + Details
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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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