Stockholders' Equity - Changes in AOCL/I by Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	$ 983,465	$ 60,878	$ (132,400)
Other comprehensive income (loss) activity during the period:
Change in AOCI/L before reclassifications to income	19,619	45,871
Reclassifications from AOCI/L to income	(61,585)	5,320
Other comprehensive (loss) income, net of tax	(41,966)	51,191	(5,281)
Ending Balance	850,757	983,465	60,878
AOCI Attributable to Parent
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	1,508	(49,683)	(44,402)
Other comprehensive income (loss) activity during the period:
Other comprehensive (loss) income, net of tax	(41,966)	51,191	(5,281)
Ending Balance	(39,867)	1,508	(49,683)
Interest Rate Swaps
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	2,483	(1,409)
Other comprehensive income (loss) activity during the period:
Change in AOCI/L before reclassifications to income	(9,447)	(1,492)
Reclassifications from AOCI/L to income	(1,397)	5,384
Other comprehensive (loss) income, net of tax	(10,844)	3,892
Ending Balance	(7,770)	2,483	(1,409)
Defined Benefit Pension Plans
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	(5,861)	(5,797)
Other comprehensive income (loss) activity during the period:
Change in AOCI/L before reclassifications to income	0	0
Reclassifications from AOCI/L to income	123	(64)
Other comprehensive (loss) income, net of tax	123	(64)
Ending Balance	(5,738)	(5,861)	(5,797)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	4,886	(42,477)
Other comprehensive income (loss) activity during the period:
Change in AOCI/L before reclassifications to income	29,066	47,363
Reclassifications from AOCI/L to income	(60,311)	0
Other comprehensive (loss) income, net of tax	(31,245)	47,363
Ending Balance	$ (26,359)	4,886	$ (42,477)
ASU 2018-02 | AOCI Attributable to Parent
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Adoption of ASU		591
ASU 2018-02 | Interest Rate Swaps
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Adoption of ASU		$ 591