LEASES - Maturities of Operating and Financing Lease Liabilities (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Operating Leases
2021	$ 51,636
2022	52,635
2023	53,637
2024	53,897
2025	54,440
After 2025	159,740
Total lease payments	425,985
Less: Interest	(123,859)
Present value of lease liabilities	302,126
Finance Leases
2021	271
2022	222
2023	74
2024	32
2025	0
After 2025	0
Total lease payments	599
Less: Interest	(48)
Present value of lease liabilities	551
Operating and Finance Lease Liabilities Payments Due [Abstract]
2021	51,907
2022	52,857
2023	53,711
2024	53,929
2025	54,440
After 2025	159,740
Total lease payments	426,584
Less: Interest	(123,907)
Present value of lease liabilities	$ 302,677

Finance Lease, Liability, to be Paid, After Year Four

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Operating and Finance Lease Liability Payments Due After Year Four

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Operating And Finance Lease, Liability, Payments, Remainder of Fiscal Year

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Operating and Finance Lease Liabilities Payments Due [Abstract]

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Operating and Finance Lease Liability

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Operating and Finance Lease Liability Payments Due Year Three

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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-Section 45
-Paragraph 1
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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in remainder of current fiscal year.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for finance lease.

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Amount of lessee's undiscounted obligation for lease payment for operating lease.

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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 45
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

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