Income Taxes - Schedule of Deferred Income Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Net operating losses	$ 130,880	$ 147,710
Property and equipment	12,380	12,988
Accruals and accrued loss contingencies	8,043	9,602
Gross deferred income tax assets	151,303	170,300
Prepaid expenses	(398)	(497)
Other	(3)	(2)
Intangible assets	(2,742)	(5,924)
Gross deferred income tax liabilities	(3,143)	(6,423)
Net deferred income tax assets	148,160	163,877
Valuation allowance	(119,277)	(118,723)	(115,746)	(170,939)
Total deferred income tax assets	$ 28,883	$ 45,154