Stock Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended			1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Oct. 21, 2013 Restricted Stock	Dec. 31, 2013 Restricted Stock	Dec. 31, 2013 Minimum	Dec. 31, 2013 Maximum
Stock Based Compensation (Textual) [Abstract]
Stock options granted, exercisable life	5 years
Stock options vested period				4 years		3 years	5 years
Stock options remainder vesting period	3 years
Stock options, authorized	1,523,713
Restricted stock, Issued				100,000
Restricted stock, grant date fair value	$ 2.45	$ 3.49	$ 2.09	$ 5.89
Restricted stock, vested or forfeited					0
Non-cash compensation expense	$ 3,005,000	$ 2,406,000	$ 2,217,000
Tax benefits related to stock based compensation	0
Unrecognized compensation costs	2,600,000
Compensation costs expected to be recognized	2 years
Cash proceeds from Stock options exercised	$ 3,700,000	$ 3,300,000	$ 1,900,000