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ACCUMULATED OTHER COMPREHENSIVE LOSS (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance in AOCL Beginning of Year	$ 1,375,796	$ 962,306	$ 839,667
Other comprehensive loss, net	(19,567)
Less: Amounts reclassified from accumulated other comprehensive income, net	11,392
Total other comprehensive income (loss), net of tax	(30,959)	(21,636)	33,347
Balance in AOCL End of Year	1,416,736	1,375,796	962,306
Gains and Losses on Derivatives
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance in AOCL Beginning of Year	(4,813)
Other comprehensive loss, net	(10,420)
Less: Amounts reclassified from accumulated other comprehensive income, net	11,392
Total other comprehensive income (loss), net of tax	(21,812)
Balance in AOCL End of Year	(26,625)	(4,813)
Defined Benefit Pension Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance in AOCL Beginning of Year	(736)
Other comprehensive loss, net	(8,973)
Less: Amounts reclassified from accumulated other comprehensive income, net	0
Total other comprehensive income (loss), net of tax	(8,973)
Balance in AOCL End of Year	(9,709)	(736)
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance in AOCL Beginning of Year	(39,894)
Other comprehensive loss, net	(174)
Less: Amounts reclassified from accumulated other comprehensive income, net	0
Total other comprehensive income (loss), net of tax	(174)
Balance in AOCL End of Year	(40,068)	(39,894)
Total
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance in AOCL Beginning of Year	(45,443)	(23,807)	(57,154)
Total other comprehensive income (loss), net of tax	(30,959)	(21,636)	33,347
Balance in AOCL End of Year	$ (76,402)	$ (45,443)	$ (23,807)

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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