Income Taxes - Schedule of Income Tax Provisions from Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Income (loss) from continuing operations before provision for income taxes	$ 1,462	$ (2,872)	$ 4,518	$ (4,780)
Provision for income taxes	$ (257)	$ (118)	$ (284)	$ (737)
Effective tax rate	17.60%	(4.10%)	6.30%	(15.40%)