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LEASES - Operating lease liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Lessee, Operating Lease, Liability, Payment, Due [Abstract] |  |
2020 | $ 19,225 |
2021 | 19,129 |
2022 | 20,049 |
2023 | 16,641 |
2024 | 11,006 |
Later years | 58,562 |
Discount | (29,028) |
Total discounted operating lease liabilities | $ 115,584 |
Year ended December 31, |  |
2019 |  | $ 28,240
2020 |  | 25,331
2021 |  | 27,025
2022 |  | 28,012
2023 |  | 23,801
Later years |  | 118,497
Total future minimum lease payments |  | $ 250,906

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- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth fiscal year following latest fiscal year. + References 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=77888426&loc=SL77918701-209980 + Details
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