Stock-Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Stock Based Compensation [Line Items]
Stock-based compensation cost, gross	$ 114,000	$ 165,000	$ 446,000	$ 909,000
Stock-based compensation cost, net of tax	85,000	154,000	326,000	631,000
2013 Long Term Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]
Stock Based Compensation [Line Items]
Stock-based compensation cost, gross	$ 31,000		$ 74,000
Restricted stock units vesting period for the 2013 Long Term Incentive Plan	3