Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross carrying value of goodwill	$ 2,260,000		$ 2,260,000
Accumulated goodwill impairment	(2,260,000)		(2,260,000)
Goodwill impairment loss	$ (190,700)		(190,714)			$ (2,080,000)
Non-cash impairment charge			109,910	$ 109,910
Income tax benefit			42,283	26,179	$ (82,034)
Amortization expense on intangible assets			20,456	20,710	$ 20,752
Customer-Related and Other
Finite-Lived Intangible Assets [Line Items]
Non-cash impairment charge			0	0
Trademarks
Finite-Lived Intangible Assets [Line Items]
Non-cash impairment charge			$ 109,910	$ 109,910
Weighted-average amortization period			5 years
Minimum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Remaining amortization period		1 year
Maximum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Remaining amortization period		7 years