INCOME TAXES INCOME TAXES (Provision) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal									$ 365	$ 280	$ 75
State									280	1,264	293
Foreign									57	34	44
Total current									702	1,578	412
Deferred:
Federal									56,350	7,311	1,808
State									7,146	410	(324)
Foreign									(10)	(2)	(1)
Total deferred									63,486	7,719	1,483
Total provision for income taxes	$ 71,915	$ (5,412)	$ (1,975)	$ (340)	$ 1,119	$ (543)	$ (243)	$ 8,964	$ 64,188	$ 9,297	$ 1,895