INCOME TAXES (Provision for Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Domestic	$ 115,070	$ 101,714	$ 87,328
Foreign	(20,588)	(43,025)	(78,612)
(Loss) income before (benefit) provision for income taxes	94,482	58,689	8,716
Current:
Federal	(7,677)	25,613	14,798
State	12,653	11,083	8,763
Foreign	4,781	4,589	9,844
Current Income Tax Expense (Benefit)	9,757	41,285	33,405
Deferred
Federal	19,899	(85,488)	21,814
State	(1,205)	1,085	1,644
Foreign	395	1,068	(8,274)
Deferred income taxes	19,089	(83,335)	15,184
Provision (benefit) for income taxes	28,846	(42,050)	48,589
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Tax expense at US statutory rate	19,841	20,541	3,051
State income taxes, net of federal benefit	8,711	4,547	6,010
Foreign rate differential	(1,124)	3,733	3,646
Valuation allowance	10,466	16,552	22,564
Uncertain tax position interest and penalties	(1,806)	3,730	107
Goodwill impairment	0	0	11,905
Tax credits	(9,799)	0	0
Other	2,845	1,856	1,306
Adjustment for Tax Cuts and Jobs Act	(288)	(93,009)	0
Provision (benefit) for income taxes	$ 28,846	$ (42,050)	$ 48,589