Income Taxes - Schedule of Net Deferred Income Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Net deferred income tax asset	$ 18,565	$ 13,037
Valuation allowance	(15,176)	(9,122)
Deferred income tax assets, current	3,389	3,915
Net deferred income tax asset	129,595	150,840
Valuation allowance	(104,101)	(109,601)
Deferred income tax assets, non current	25,494	41,239
Total deferred income tax assets	$ 28,883	$ 45,154