INCOME TAXES - Statutory Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statutory rate
Statutory tax rate (as a percentage)	21.00%	35.00%	35.00%
Reconciliation
Statutory federal expense (35%)	$ 44,699	$ 81,781	$ 65,023
Statutory state income tax expense, net of federal tax benefit	8,744	7,594	6,714
Revaluation of deferred tax liabilities, net		(58,313)
Other	(1,535)	(9,235)	(267)
Income tax expense	$ 51,908	$ 21,827	$ 71,470