Intangible Assets and Goodwill - Company's Intangible Assets and Goodwill (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2014	Dec. 31, 2015
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (7,345)		$ (7,010)
Definite-lived intangible assets, Net Book Value	19,455
Total intangible assets, Gross Carrying Amount	36,733		36,733
Accumulated Amortization	(7,345)		(7,010)
Total intangible assets, Net Book Value	29,388		29,723
Goodwill	53,531		53,531
Total intangible assets and goodwill, Gross Carrying Amount	90,264		90,264
Accumulated Amortization	(7,345)		(7,010)
Total intangible assets and goodwill, Net Book Value	82,919		83,254
Trademarks
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 9,933		9,933
Customer Relationships
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life (years)	20 years	20 years
Definite-lived intangible assets, Gross Carrying Amount	$ 26,800		26,800
Accumulated Amortization	(7,345)		(7,010)
Definite-lived intangible assets, Net Book Value	19,455		19,790
Accumulated Amortization	(7,345)		(7,010)
Accumulated Amortization	$ (7,345)		$ (7,010)