Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Effective tax rate from continuing operations	54.00%	60.80%	46.30%	44.40%
Net unrealized built in loss, recognition period			5 years
Annual limitation net operating loss			$ 1,700,000
Net deferred tax assets	108,275,000		108,275,000		102,908,000
Unrecognized tax benefits	$ 2,678,000		$ 2,678,000		$ 2,678,000