Revenue Recognition - Schedule of Impact of Adoption New Standard to Previously reported Selected Financial Statement Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation Of Revenue [Line Items]
Gross revenues		$ 472,878		$ 1,050,897
Net revenues	$ 487,253	472,878	$ 1,384,247	1,050,897
Operating income	91,769	81,492	223,377	65,053
Net (loss) income	$ 37,704	29,687	$ 95,355	(15,558)
Adoption of ASC Topic 606 | As Reported
Disaggregation Of Revenue [Line Items]
Gross revenues		483,036		1,088,754
Promotional allowances		(38,162)		(87,776)
Net revenues		444,874		1,000,978
Operating income		78,924		60,955
Net (loss) income		29,554		(15,754)
Adoption of ASC Topic 606 | ASC 606 Adjustments
Disaggregation Of Revenue [Line Items]
Gross revenues		(39,651)		(88,225)
Promotional allowances		41,785		93,838
Net revenues		2,134		5,613
Operating income		182		172
Net (loss) income		133		196
Adoption of ASC Topic 606 | Other Reclassifications
Disaggregation Of Revenue [Line Items]
Gross revenues		29,493		50,368
Promotional allowances		(3,623)		(6,062)
Net revenues		25,870		44,306
Operating income		$ 2,386		$ 3,926