Goodwill and Intangible Assets - Gross Carrying Amount and Accumulated Amortization of Intangible Assets other than Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Intangible assets with finite lives:
Intangible assets with finite lives, impairment	$ (109,910)	$ (109,910)
Intangible assets with finite lives, Accumulated Amortization	(125,194)	(120,044)
Intangible assets, Acquisition Costs	383,569	383,569
Intangible assets, Net Carrying Amount	148,465	153,615
Customer-related and other
Intangible assets with finite lives:
Intangible assets with finite lives, Acquisition Costs	83,545	83,545
Intangible assets with finite lives, impairment	0	0
Intangible assets with finite lives, Accumulated Amortization	(46,465)	(45,423)
Intangible assets with finite lives, Net Carrying Amount	37,080	38,122
Trademarks
Intangible assets with finite lives:
Intangible assets with finite lives, Acquisition Costs	230,709	230,709
Intangible assets with finite lives, impairment	(109,910)	(109,910)
Intangible assets with finite lives, Accumulated Amortization	(78,729)	(74,621)
Intangible assets with finite lives, Net Carrying Amount	42,070	46,178
Trademarks
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Intangible assets with indefinite lives, Acquisition Costs	$ 69,315	$ 69,315