INCOME TAXES (PROVISION TABLE) (DETAILS) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current provision
Federal current									$ 48,556	$ (373)	$ 4,094
State current									99	372	1,829
Foreign current									12,643	14,447	4,764
Total current provision									61,298	14,446	10,687
Deferred provision (benefit)
Federal deferred									14,441	(2,390)	(1,895)
State deferred									707	103	1,085
Foreign deferred									1,629	704	10,127
Deferred Income Tax Expense (Benefit), Total									16,777	(1,583)	9,317
Income Tax Expense (Benefit), Total	$ 69,016	$ 2,071	$ 1,597	$ 5,391	$ 6,196	$ (813)	$ 2,952	$ 4,528	$ 78,075	$ 12,863	$ 20,004