INCOME TAXES (Income tax provisions) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ 4,600	$ 29,700	$ 9,600
Foreign	14,300	10,200	11,400
State	1,200	1,100	800
Total current	20,100	41,000	21,800
Deferred:
Federal	3,600	(10,700)	2,900
Foreign	(2,600)	(4,500)	(1,000)
State	(6,200)	200	1,100
Total deferred	(5,200)	(15,000)	3,000
Current payable and deferred - Income tax provisions	$ 14,890	$ 25,994	$ 24,798