Income Taxes - Provision (Benefit) for Income Taxes and Effective Income Tax Rate (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes		$ (2,436)	$ 17	$ (5,931)
Effective income tax rate	0.00%	(34.60%)	0.20%	(38.20%)