INCOME TAXES (Provision for Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Domestic	$ 101,714	$ 87,328	$ 164,105
Foreign	(43,025)	(78,612)	(54,459)
Income (loss) before (benefit) provision for income taxes	58,689	8,716	109,646
Current:
Federal	25,613	14,798	46,775
State	11,083	8,763	11,120
Foreign	4,589	9,844	5,719
Current Income Tax Expense (Benefit)	41,285	33,405	63,614
Deferred
Federal	(85,488)	21,814	12,254
State	1,085	1,644	2,766
Foreign	1,068	(8,274)	(13,090)
Deferred income taxes	(83,335)	15,184	1,930
(Benefit) provision for income taxes	(42,050)	48,589	65,544
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Tax expense at US statutory rate	20,541	3,051	38,376
State income taxes, net of federal benefit	4,547	6,010	8,449
Foreign rate differential	3,733	3,646	3,951
Valuation allowance	16,552	22,564	1,824
Uncertain tax position interest and penalties	3,730	107	32
Goodwill impairment	0	11,905	10,974
Other	1,856	1,306	1,938
Adjustment for Tax Cuts and Jobs Act	(93,009)	0	0
(Benefit) provision for income taxes	$ (42,050)	$ 48,589	$ 65,544