INCOME TAXES (PROVISION TABLE) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current provision
Federal current									$ 2,771	$ 48,556	$ (373)
State current									2,754	99	372
Foreign current									18,933	12,643	14,447
Total current provision									24,458	61,298	14,446
Deferred provision (benefit)
Federal deferred									(943)	14,441	(2,390)
State deferred									(138)	707	103
Foreign deferred									(6,894)	1,629	704
Deferred Income Tax Expense (Benefit), Total									(7,975)	16,777	(1,583)
Income Tax Expense (Benefit), Total	$ 11,835	$ 1,893	$ 653	$ 2,102	$ 69,016	$ 2,071	$ 1,597	$ 5,391	$ 16,483	$ 78,075	$ 12,863