Goodwill and Intangible Assets - Narrative (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Nov. 01, 2013
Business Acquisition [Line Items]
Goodwill	$ 38,634	$ 38,634	$ 38,148
Other identifiable intangible assets	8,082
Identified intangible assets with indefinite useful life	$ 3,721
HCON
Business Acquisition [Line Items]
Goodwill				$ 38,600
Other identifiable intangible assets				8,100
Identified intangible assets with indefinite useful life				3,700
Fair value				$ 4,400