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INCOME TAXES - Consolidated Income Tax Expense (benefit) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Current      
Federal $ 22,120 $ 21,316 $ 51,489
State 7,271 4,327 10,307
Foreign 168 155 144
Current income tax expense (benefit), total 29,559 25,798 61,940
Deferred      
Federal (1,613) (16,065) 3,448
State (1,312) 1,459 686
Foreign (51) (76) (90)
Deferred income tax expense (benefit), total (2,976) (14,682) 4,044
Income tax expense $ 26,583 $ 11,116 $ 65,984