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PENSION AND OTHER POSTRETIREMENT PLANS (Details) - USD ($) | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2015 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2015 | Sep. 30, 2014
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | $ 142,225,000 | $ 131,753,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 142,225,000 | 131,753,000 |  | $ 142,225,000 | $ 131,753,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 142,225,000 | 131,753,000 |  | 142,225,000 | 131,753,000
Effect of one-percentage point change in assumed health care cost trend rates [Abstract] |  |  |  |  |  |  |
Agreement to settle installment payment obligation in exchange for a lump-sum payment |  | $ 18,157 |  |  |  |  |
Settlement of gain recognized in other income (deductions) |  |  | 11,522 |  |  |  |
Level 1 [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 111,714,000 | 106,940,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 111,714,000 | 106,940,000 |  | 111,714,000 | 106,940,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 111,714,000 | 106,940,000 |  | 111,714,000 | 106,940,000
Level 2 [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 16,529,000 | 10,483,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 16,529,000 | 10,483,000 |  | 16,529,000 | 10,483,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 16,529,000 | 10,483,000 |  | 16,529,000 | 10,483,000
Level 3 [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 13,982,000 | 14,330,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 13,982,000 | 14,330,000 |  | 13,982,000 | 14,330,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 13,982,000 | 14,330,000 |  | 13,982,000 | 14,330,000
Equity Securities - Stocks [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 31,559,000 | 35,310,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 31,559,000 | 35,310,000 |  | 31,559,000 | 35,310,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 31,559,000 | 35,310,000 |  | 31,559,000 | 35,310,000
Equity Securities - Stocks [Member] | Level 1 [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 31,559,000 | 35,310,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 31,559,000 | 35,310,000 |  | 31,559,000 | 35,310,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 31,559,000 | 35,310,000 |  | 31,559,000 | 35,310,000
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 |  | 0 | 0
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 0 | 0 |  | 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 |  | 0 | 0
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 0 | 0 |  | 0 | 0
Equity Securities - Mutual Funds [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 28,901,000 | 31,674,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 28,901,000 | 31,674,000 |  | 28,901,000 | 31,674,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 28,901,000 | 31,674,000 |  | 28,901,000 | 31,674,000
Equity Securities - Mutual Funds [Member] | Level 1 [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 27,846,000 | 30,694,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 27,846,000 | 30,694,000 |  | 27,846,000 | 30,694,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 27,846,000 | 30,694,000 |  | 27,846,000 | 30,694,000
Equity Securities - Mutual Funds [Member] | Level 2 [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 1,055,000 | 980,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 1,055,000 | 980,000 |  | 1,055,000 | 980,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 1,055,000 | 980,000 |  | 1,055,000 | 980,000
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 |  | 0 | 0
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 0 | 0 |  | 0 | 0
Fixed Income Securities [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 55,118,000 | 29,545,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 55,118,000 | 29,545,000 |  | 55,118,000 | 29,545,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 55,118,000 | 29,545,000 |  | 55,118,000 | 29,545,000
Fixed Income Securities [Member] | Level 1 [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 39,644,000 | 20,042,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 39,644,000 | 20,042,000 |  | 39,644,000 | 20,042,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 39,644,000 | 20,042,000 |  | 39,644,000 | 20,042,000
Fixed Income Securities [Member] | Level 2 [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 15,474,000 | 9,503,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 15,474,000 | 9,503,000 |  | 15,474,000 | 9,503,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 15,474,000 | 9,503,000 |  | 15,474,000 | 9,503,000
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 |  | 0 | 0
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 0 | 0 |  | 0 | 0
Cash and Cash Equivalents [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 4,494,000 | 14,796,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 4,494,000 | 14,796,000 |  | 4,494,000 | 14,796,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 4,494,000 | 14,796,000 |  | 4,494,000 | 14,796,000
Cash and Cash Equivalents [Member] | Level 1 [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 4,494,000 | 14,796,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 4,494,000 | 14,796,000 |  | 4,494,000 | 14,796,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 4,494,000 | 14,796,000 |  | 4,494,000 | 14,796,000
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 |  | 0 | 0
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 0 | 0 |  | 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 |  | 0 | 0
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 0 | 0 |  | 0 | 0
Other Investments [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 22,153,000 | 20,428,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 22,153,000 | 20,428,000 |  | 22,153,000 | 20,428,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 22,153,000 | 20,428,000 |  | 22,153,000 | 20,428,000
Other Investments [Member] | Level 1 [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 8,171,000 | 6,098,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 8,171,000 | 6,098,000 |  | 8,171,000 | 6,098,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 8,171,000 | 6,098,000 |  | 8,171,000 | 6,098,000
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 |  | 0 | 0
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 0 | 0 |  | 0 | 0
Other Investments [Member] | Level 3 [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, end of year |  |  | 13,982,000 | 14,330,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 13,982,000 | 14,330,000 |  | 13,982,000 | 14,330,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 13,982,000 | 14,330,000 |  | 13,982,000 | 14,330,000
Principal Retirement Plan [Member] |  |  |  |  |  |  |
Contributions during fiscal 2015: |  |  |  |  |  |  |
Pension contributions |  |  | 0 |  |  |  |
Other postretirement contributions |  |  | 0 |  |  |  |
Supplemental Retirement Plan [Member] |  |  |  |  |  |  |
Contributions during fiscal 2015: |  |  |  |  |  |  |
Pension contributions |  |  | 725,000 |  |  |  |
Other postretirement contributions |  |  | 0 |  |  |  |
Pension Plans [Member] |  |  |  |  |  |  |
Change in benefit obligation [Roll Forward] |  |  |  |  |  |  |
Benefit obligation, beginning of year |  |  | 211,036,000 | 186,077,000 |  |  |
Acquisitions |  |  | 27,162,000 | 0 |  |  |
Service cost |  |  | 6,764,000 | 6,150,000 | $ 7,160,000 |  |
Interest cost |  |  | 8,740,000 | 8,927,000 | 8,024,000 |  |
Actuarial (gain) loss |  |  | 4,087,000 | 18,412,000 |  |  |
Exchange gain |  |  | (1,206,000) | (703,000) |  |  |
Benefit payments | [1] |  | (17,856,000) | (7,827,000) |  |  |
Benefit obligation, end of year |  |  | 238,727,000 | 211,036,000 |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, beginning of year |  |  | 131,753,000 | 123,713,000 |  |  |
Acquisitions |  |  | 25,897,000 | 0 |  |  |
Actual return |  |  | 625,000 | 10,792,000 |  |  |
Benefit payments | [1] |  | (17,856,000) | (7,827,000) |  |  |
Employer contributions |  |  | 1,806,000 | 5,075,000 |  |  |
Fair value, end of year |  |  | 142,225,000 | 131,753,000 |  |  |
Funded status |  |  |  |  |  | (96,502,000) | (79,283,000)
Unrecognized actuarial loss (gain) |  |  |  |  |  | 77,368,000 | 69,153,000
Unrecognized prior service cost |  |  |  |  |  | (1,231,000) | (1,411,000)
Net amount recognized |  |  |  |  |  | (20,365,000) | (11,541,000)
Amounts recognized in the consolidated balance sheet: |  |  |  |  |  |  |
Current liability |  |  |  |  |  | (749,000) | (733,000)
Noncurrent benefit liability |  |  |  |  |  | (95,753,000) | (78,550,000)
Accumulated other comprehensive loss (income) |  |  |  |  |  | 76,137,000 | 67,742,000
Net amount recognized |  |  |  |  |  | (20,365,000) | (11,541,000)
Amounts recognized in accumulated other comprehensive loss (income): |  |  |  |  |  |  |
Net actuarial loss (income) |  |  |  |  |  | 77,368,000 | 69,153,000
Prior service cost |  |  |  |  |  | (1,231,000) | (1,411,000)
Net amount recognized |  |  |  |  |  | 76,137,000 | 67,742,000
Accumulated benefit obligations in excess of plan assets [Abstract] |  |  |  |  |  |  |
Accumulated benefit obligation |  |  |  |  |  | 208,407,000 | 180,265,000
Projected benefit obligation |  |  |  |  |  | 238,727,000 | 211,036,000
Settlement of the employees pension obligations |  |  | 10,000 |  |  |  |
Net periodic benefit cost [Abstract] |  |  |  |  |  |  |
Service cost |  |  | 6,764,000 | 6,150,000 | 7,160,000 |  |
Interest cost |  |  | 8,740,000 | 8,927,000 | 8,024,000 |  |
Expected return on plan assets |  |  | (10,151,000) | (9,666,000) | (9,071,000) |  |
Amortization: |  |  |  |  |  |  |
Prior service cost |  |  | (180,000) | (206,000) | (206,000) |  |
Net actuarial loss (gain) |  |  | 6,203,000 | 3,927,000 | 7,903,000 |  |
Net benefit cost |  |  | 11,376,000 | $ 9,132,000 | $ 13,810,000 |  |
Amounts of AOCI expected to be recognized in net periodic benefit costs [Abstract] |  |  |  |  |  |  |
Net actuarial loss |  |  | 7,473,000 |  |  |  |
Prior service cost |  |  | $ (183,000) |  |  |  |
Weighted-average assumptions [Abstract] |  |  |  |  |  |  |
Discount rate |  |  | 4.25% | 4.25% | 5.00% |  |
Return on plan assets |  |  | 7.75% | 7.75% | 8.00% |  |
Compensation increase |  |  | 3.50% | 3.50% | 3.50% |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Equity securities |  |  |  |  |  | 60,460,000 | 66,984,000
Fixed income, cash and cash equivalents |  |  |  |  |  | 59,612,000 | 44,341,000
Other investments |  |  |  |  |  | 22,153,000 | 20,428,000
Fair value of plan assets |  |  | $ 142,225,000 | $ 131,753,000 |  | 142,225,000 | 131,753,000
Target allocation [Abstract] |  |  |  |  |  |  |
Equity securities |  |  | 50.00% |  |  |  |
Fixed income, cash and cash equivalents |  |  | 30.00% |  |  |  |
Other investments |  |  | 20.00% |  |  |  |
Total target asset allocation |  |  | 100.00% |  |  |  |
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | $ 142,225,000 | 131,753,000 |  | 142,225,000 | 131,753,000
Benefit payments expected to be paid [Abstract] |  |  |  |  |  |  |
2016 |  |  |  |  |  | 9,074,000 |
2017 |  |  |  |  |  | 9,519,000 |
2018 |  |  |  |  |  | 10,075,000 |
2019 |  |  |  |  |  | 10,673,000 |
2020 |  |  |  |  |  | 11,249,000 |
2021-2025 |  |  |  |  |  | 65,563,000 |
Total |  |  |  |  |  | $ 116,153,000 |
Pension Plans [Member] | Equity Securities [Member] |  |  |  |  |  |  |
Target allocation [Abstract] |  |  |  |  |  |  |
Cash included in plan assets |  |  |  |  |  | 15.00% |
Pension Plans [Member] | Fixed Income Securities [Member] |  |  |  |  |  |  |
Target allocation [Abstract] |  |  |  |  |  |  |
Cash included in plan assets |  |  |  |  |  | 85.00% |
Pension Plans [Member] | Other Investments [Member] | Level 3 [Member] |  |  |  |  |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, beginning of year |  |  | 14,330,000 | 18,942,000 |  |  |
Acquisitions |  |  | 0 | 0 |  |  |
Dispositions |  |  | (1,661,000) | (5,439,000) |  |  |
Realized Gains |  |  | 608,000 | 1,118,000 |  |  |
Unrealized Gains (Losses) |  |  | 705,000 | (291,000) |  |  |
Fair value, end of year |  |  | 13,982,000 | 14,330,000 |  |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 13,982,000 | 14,330,000 |  | $ 13,982,000 | 14,330,000
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | 13,982,000 | 14,330,000 |  | 13,982,000 | 14,330,000
Other Postretirement Plans [Member] |  |  |  |  |  |  |
Change in benefit obligation [Roll Forward] |  |  |  |  |  |  |
Benefit obligation, beginning of year |  |  | 21,358,000 | 18,881,000 |  |  |
Acquisitions |  |  | 0 | 0 |  |  |
Service cost |  |  | 454,000 | 436,000 | $ 796,000 |  |
Interest cost |  |  | 885,000 | 919,000 | 1,129,000 |  |
Actuarial (gain) loss |  |  | (814,000) | 1,929,000 |  |  |
Exchange gain |  |  | 0 | 0 |  |  |
Benefit payments | [1] |  | (1,459,000) | (807,000) |  |  |
Benefit obligation, end of year |  |  | 20,424,000 | 21,358,000 |  |  |
Change in plan assets [Roll Forward] |  |  |  |  |  |  |
Fair value, beginning of year |  |  | 0 | 0 |  |  |
Acquisitions |  |  | 0 | 0 |  |  |
Actual return |  |  | 0 | 0 |  |  |
Benefit payments | [1] |  | (1,459,000) | (807,000) |  |  |
Employer contributions |  |  | 1,459,000 | 807,000 |  |  |
Fair value, end of year |  |  | 0 | 0 |  |  |
Funded status |  |  |  |  |  | (20,424,000) | (21,358,000)
Unrecognized actuarial loss (gain) |  |  |  |  |  | (1,801,000) | (987,000)
Unrecognized prior service cost |  |  |  |  |  | (1,111,000) | (1,306,000)
Net amount recognized |  |  |  |  |  | (23,336,000) | (23,651,000)
Amounts recognized in the consolidated balance sheet: |  |  |  |  |  |  |
Current liability |  |  |  |  |  | (1,009,000) | (1,007,000)
Noncurrent benefit liability |  |  |  |  |  | (19,415,000) | (20,351,000)
Accumulated other comprehensive loss (income) |  |  |  |  |  | (2,912,000) | (2,293,000)
Net amount recognized |  |  |  |  |  | (23,336,000) | (23,651,000)
Amounts recognized in accumulated other comprehensive loss (income): |  |  |  |  |  |  |
Net actuarial loss (income) |  |  |  |  |  | (1,801,000) | (987,000)
Prior service cost |  |  |  |  |  | (1,111,000) | (1,306,000)
Net amount recognized |  |  |  |  |  | (2,912,000) | (2,293,000)
Net periodic benefit cost [Abstract] |  |  |  |  |  |  |
Service cost |  |  | 454,000 | 436,000 | 796,000 |  |
Interest cost |  |  | 885,000 | 919,000 | 1,129,000 |  |
Expected return on plan assets |  |  | 0 | 0 | 0 |  |
Amortization: |  |  |  |  |  |  |
Prior service cost |  |  | (195,000) | (195,000) | (272,000) |  |
Net actuarial loss (gain) |  |  | 0 | (87,000) | 439,000 |  |
Net benefit cost |  |  | 1,144,000 | $ 1,073,000 | $ 2,092,000 |  |
Contributions during fiscal 2015: |  |  |  |  |  |  |
Pension contributions |  |  | 0 |  |  |  |
Other postretirement contributions |  |  | 1,459,000 |  |  |  |
Amounts of AOCI expected to be recognized in net periodic benefit costs [Abstract] |  |  |  |  |  |  |
Net actuarial loss |  |  | 0 |  |  |  |
Prior service cost |  |  | $ (195,000) |  |  |  |
Weighted-average assumptions [Abstract] |  |  |  |  |  |  |
Discount rate |  |  | 4.25% | 4.25% | 5.00% |  |
Return on plan assets |  |  | 0.00% | 0.00% | 0.00% |  |
Compensation increase |  |  | 0.00% | 0.00% | 0.00% |  |
Weighted average asset allocation [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | $ 0 | $ 0 |  | 0 | 0
Fair value of plan assets [Abstract] |  |  |  |  |  |  |
Fair value of plan assets |  |  | $ 0 | $ 0 |  | 0 | $ 0
Benefit payments expected to be paid [Abstract] |  |  |  |  |  |  |
2016 |  |  |  |  |  | 1,009,000 |
2017 |  |  |  |  |  | 1,051,000 |
2018 |  |  |  |  |  | 1,146,000 |
2019 |  |  |  |  |  | 1,194,000 |
2020 |  |  |  |  |  | 1,169,000 |
2021-2025 |  |  |  |  |  | 6,507,000 |
Total |  |  |  |  |  | $ 12,076,000 |
Assumed health care cost trend rates [Abstract] |  |  |  |  |  |  |
Per capita cost of health care benefits assumed for next fiscal year |  |  | 7.00% |  |  |  |
Ultimate health care cost trend rate |  |  | 4.00% |  |  |  |
Year that rate reaches ultimate trend rate |  |  |  |  |  | 2070 |
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 |  |  | $ 923,000 |  |  |  |
Effect of one percentage point increase on service and interest cost components |  |  | 68,000 |  |  |  |
Effect of one percentage point decrease on accumulated postretirement benefit obligation |  |  | 809,000 |  |  |  |
Effect of one percentage point decrease on service and interest cost components |  |  | 59,000 |  |  |  |
Other Retirement Plans [Member] |  |  |  |  |  |  |
Contributions during fiscal 2015: |  |  |  |  |  |  |
Pension contributions |  |  | 1,081,000 |  |  |  |
Other postretirement contributions |  |  | $ 0 |  |  |  |
[1] | Pension benefit payments in fiscal 2015 includes $10,000 of lump sum distributions that were made to certain terminated vested employees as a settlement of the employees' pension obligations. These distributions did not meet the threshold to qualify as a settlement under U.S. GAAP and therefore, no unamortized actuarial loss was recognized in the Statement of Income upon completion of the lump sum distributions.

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- Definition The amount of increase in the plan assets attributed to a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(6) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition The increase in the fair value of plan assets from contributions made by the employer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The amount of decrease in the plan assets attributed to the sale, liquidation, spin-off or other divestiture of a corporate division or subsidiary. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(7) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (m) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (m) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The effect of a one-percentage-point increase in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (m) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The effect of a one-percentage-point increase in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (m) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Amount of benefits from a defined benefit plan expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Amount of benefits from a defined benefit plan expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Amount of benefits from a defined benefit plan expected to be paid in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Amount of benefits from a defined benefit plan expected to be paid in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Amount of benefits from a defined benefit plan expected to be paid in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Amount of benefits from a defined benefit plan expected to be paid in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Expected Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512171 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + 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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- Definition Amount of gain (loss) from foreign currency exchange rate changes for benefit obligation for plans of a foreign operation whose functional currency is not the reporting currency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(5) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=21915240&loc=d3e1703-114919 + Details
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- Definition Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position. + References No definition available. + Details
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- Definition The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Health Care Cost Trend Rate -URI http://asc.fasb.org/extlink&oid=6514820 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=58242635&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2417-114920 + Details
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- Definition If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=58242635&loc=d3e4179-114921 + Details
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- Definition Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Service Cost (Component of Net Periodic Pension Cost) -URI http://asc.fasb.org/extlink&oid=6525008 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Target allocation of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The ultimate trend rate for health care costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The amount of cash or cash equivalents contributed during the reporting period by the entity to fund non-pension postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3536-108585 + Details
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