Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended	63 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2011	Mar. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross carrying value of goodwill					$ 2,230,000,000
Accumulated impairment of goodwill					2,080,000,000
Goodwill impairment charge			$ 2,080,000,000	$ 0
Goodwill	$ 154,112,000			$ 154,112,000	$ 154,112,000
Amortization expense on intangible assets	$ 5,155,000	$ 6,325,000
Trademarks | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life		3 years
Trademarks | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life		9 years