INCOME TAXES (Details 2) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current income tax (benefit) expense:
Federal									$ 63,642	$ (62,829)	$ 174,640
State									48,558	(4,750)	70,527
Foreign									1,345	409	3,846
Total current income tax expense (benefit)									113,545	(67,170)	249,013
Deferred income tax expense (benefit):
Federal									25,296	199,858	(111,122)
State									1,883	60,437	(36,040)
Foreign									(213)	919	(706)
Total deferred income tax expense (benefit)									26,966	261,214	(147,868)
Income tax expense	$ 50,403	$ 13,321	$ 39,632	$ 37,155	$ 56,680	$ 44,892	$ 45,673	$ 46,799	$ 140,511	$ 194,044	$ 101,145