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EMPLOYEE BENEFIT PLANS (Details) - Plan assets and benefit obligation of the defined benefit plans - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Change in benefit obligation: |  |  |
Actuarial (gain) loss | $ (887) |  |
Change in plan assets: |  |  |
Fair value of plan assets at beginning of fiscal year | 150,822 |  |
Fair value of plan assets at end of fiscal year | 150,634 | $ 150,822 |
Pension Plan [Member] |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at beginning of fiscal year | 174,337 | 189,156 |
Interest cost | 5,084 | 4,892 | $ 5,465
Benefits paid | (10,531) | (10,393) |
Actuarial (gain) loss | (7,562) | (9,318) |
Benefit obligation at end of fiscal year | 161,328 | 174,337 | 189,156
Change in plan assets: |  |  |
Fair value of plan assets at beginning of fiscal year | 150,822 | 144,316 |
Actual return on plan assets | 7,940 | 13,152 |
Company contributions | 2,449 | 3,747 |
Benefits paid | (10,531) | (10,393) |
Fair value of plan assets at end of fiscal year | 150,680 | 150,822 | 144,316
Projected benefit obligation in excess of plan assets | 10,648 | 23,515 |
Amounts recognized in the statement of financial position consist of: |  |  |
Accrued liabilities | 0 | 0 |
Other liabilities (long-term) | (10,648) | (23,515) |
Total Liabilities | (10,648) | (23,515) |
Net actuarial losses | 19,088 | 24,608 |
Prior service cost | 0 | 0 |
Deferred taxes | (6,103) | (9,069) |
Total Accumulated other comprehensive loss, net of tax | 12,985 | 15,539 |
Net amount recognized at September 30, | 2,337 | (7,976) |
Accumulated benefit obligations | 161,328 | 174,337 |
Information for plans with accumulated benefit obligations in excess of plan assets: |  |  |
ABO | 161,328 | 174,337 |
PBO | (10,648) | (23,515) |
Fair value of plan assets | 150,680 | 150,822 |
Supplemental Employee Retirement Plan [Member] |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at beginning of fiscal year | 32,627 | 35,774 |
Interest cost | 544 | 715 | 1,243
Benefits paid | (3,001) | (4,057) |
Actuarial (gain) loss | (14,452) | 195 |
Benefit obligation at end of fiscal year | 15,718 | 32,627 | 35,774
Change in plan assets: |  |  |
Fair value of plan assets at beginning of fiscal year | 0 | 0 |
Actual return on plan assets | 0 | 0 |
Company contributions | 3,001 | 4,057 |
Benefits paid | (3,001) | (4,057) |
Fair value of plan assets at end of fiscal year | 0 | 0 | $ 0
Projected benefit obligation in excess of plan assets | 15,718 | 32,627 |
Amounts recognized in the statement of financial position consist of: |  |  |
Accrued liabilities | (1,906) | (3,984) |
Other liabilities (long-term) | (13,812) | (28,643) |
Total Liabilities | (15,718) | (32,627) |
Net actuarial losses | 4,965 | 20,045 |
Prior service cost | 28 | 42 |
Deferred taxes | (1,597) | (7,486) |
Total Accumulated other comprehensive loss, net of tax | 3,396 | 12,601 |
Net amount recognized at September 30, | (12,322) | (20,026) |
Accumulated benefit obligations | 15,718 | 32,627 |
Information for plans with accumulated benefit obligations in excess of plan assets: |  |  |
ABO | 15,718 | 32,627 |
PBO | (15,718) | (32,627) |
Fair value of plan assets | $ 0 | $ 0 |

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