INCOME TAXES (Income Tax Expense (Benefit) (Details) - 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
Federal									$ 13,324	$ 19,851	$ 7,741
State									(63)	2,563	338
Foreign									17,243	14,528	12,504
Deferred
Federal									(3,581)	(13,361)	(3,979)
State									312	(1,891)	(43)
Foreign									(35)	(76)	751
Total	$ 7,287	$ 7,067	$ 6,493	$ 6,353	$ 7,095	$ 5,800	$ 5,209	$ 3,510	$ 27,200	$ 21,614	$ 17,312