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ACCOUNTING CHANGES (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Adjustment to retained earnings $ (266,099)   $ (357,016)
Cumulative effect of new accounting principle      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Adjustment to retained earnings   $ (189)