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INCOME TAXES, Provision for Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Current [Abstract]      
Federal $ 31,152 $ 32,829 $ 27,663
State and other 6,788 4,890 2,608
Deferred [Abstract]      
Federal (28,146) 11,444 9,604
State and other (546) 1,622 1,112
Provision for income taxes $ 9,248 $ 50,785 $ 40,987