INCOME TAXES (Provision for Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Domestic	$ 156,571	$ 115,070	$ 101,714
Foreign	(8,332)	(20,588)	(43,025)
(Loss) income before (benefit) provision for income taxes	148,239	94,482	58,689
Current:
Federal	20,482	(7,677)	25,613
State	14,564	12,653	11,083
Foreign	7,448	4,781	4,589
Current Income Tax Expense (Benefit)	42,494	9,757	41,285
Deferred
Federal	7,933	19,899	(85,488)
State	550	(1,205)	1,085
Foreign	(478)	395	1,068
Deferred income taxes	8,005	19,089	(83,335)
Provision (benefit) for income taxes	50,499	28,846	(42,050)
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Tax expense at US statutory rate	31,130	19,841	20,541
State income taxes, net of federal benefit	10,597	8,711	4,547
Foreign rate differential	276	(1,124)	3,733
Valuation allowance	4,459	10,466	16,552
Uncertain tax position interest and penalties	474	(1,806)	3,730
Tax credits	(50)	(9,799)	0
Non-deductible compensation	1,922	1,813	256
Other	1,691	1,032	1,600
Adjustment for Tax Cuts and Jobs Act	0	(288)	(93,009)
Provision (benefit) for income taxes	$ 50,499	$ 28,846	$ (42,050)