SUMMARY OF INCOME TAX EXPENSE (BENEFIT) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 104,711	$ 120,086	$ 120,137
State	13,414	16,968	15,433
Foreign	4,297	6,296	8,656
Current income tax expense (benefit)	122,422	143,350	144,226
Deferred:
Federal	3,193	(3,785)	(363)
State	(1,412)	1,042	(955)
Foreign	(1,331)	(3,675)	(460)
Total deferred income tax expense (benefit)	450	(6,418)	(1,778)
Total income tax expense	$ 122,872	$ 136,932	$ 142,448