Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended				9 Months Ended		12 Months Ended	57 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2011	Sep. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization expense on intangible assets	$ 5,151,000		$ 6,401,000		$ 15,596,000	$ 15,313,000
Gross carrying value of goodwill									$ 2,200,000,000
Accumulated impairment of goodwill									2,100,000,000
Goodwill impairment charge							$ 2,100,000,000	$ 0
Goodwill	163,843,000				163,843,000			$ 163,843,000	$ 86,841,000
Income tax benefit	$ (12,098,000)		$ (14,197,000)		$ (60,335,000)	$ 17,562,000
Trademarks
Finite-Lived Intangible Assets [Line Items]
Income tax benefit				$ 41,200,000
Remaining amortization period				5 years
Trademarks | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)		5 years
Trademarks | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)		10 years