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COMMITMENTS AND CONTINGENT LIABILITIES (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016 | Aug. 31, 2009
Commitments and Contingencies Disclosure [Abstract] |  |  |  |
Operating leases, rent expense, net | $ 35,726,000 | $ 26,297,000 | $ 26,180,000 |
Aggregate future minimum lease payments for operating leases in 2018 | 32,189,000 |  |  |
Aggregate future minimum lease payments for operating leases in 2019 | 26,365,000 |  |  |
Aggregate future minimum lease payments for operating leases in 2020 | 16,600,000 |  |  |
Aggregate future minimum lease payments for operating leases in 2021 | 10,811,000 |  |  |
Aggregate future minimum lease payments for operating leases in 2022 | 6,082,000 |  |  |
Aggregate future minimum lease payments for operating leases thereafter | 12,135,000 |  |  |
Purchase obligation, due in next twelve months | 226,026,000 |  |  |
Purchase obligation due in second year | 5,569,000 |  |  |
Purchase obligation due in third year | 2,000 |  |  |
Purchase obligation due in fourth year | 1,000 |  |  |
Purchase obligation due in fifth year | 1,470,000 |  |  |
Net capital cost value |  |  |  | $ 5,000,000
Obligation under consent order | $ 0 |  |  |
Net capital cost value in proposed remedial action plan |  |  |  | $ 10,000,000

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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 + Details
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