Intangible Assets, Net - Schedule of Activity in Intangible Assets, Net (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible assets, net, beginning of period	$ 44,633	$ 48,711
Amortization	(2,051)	(2,105)
Intangible assets, net, end of period	$ 42,582	$ 46,606