Employee Benefit Plans (Detail) - Status of Restricted Stock Awarded under the Company’s Restricted Stock Plan (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non vested balance at beginning of period	569,296	933,887
Granted	58,669	60,805
Forfeited	(206,282)	(181,687)
Vested	(142,783)	(243,709)
Non vested balance at end of period	278,900	569,296
Non vested balance at beginning of period (in dollars per share)	$ 5.26	$ 6.22
Granted (in dollars per share)	$ 4.42	$ 4.88
Forfeited (in dollars per share)	$ 4.59	$ 5.11
Vested (in dollars per share)	$ 3.87	$ 8.95
Non vested balance at end of period (in dollars per share)		$ 5.26
Restricted Stock [Member] | Ending Balance [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non vested balance at end of period	278,900	569,296
Non vested balance at end of period (in dollars per share)	$ 6.28	$ 5.26
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non vested balance at beginning of period	371,502	423,264
Granted	247,463	33,822
Forfeited	(135,104)	(71,223)
Vested	(70,573)	(14,361)
Non vested balance at end of period	413,288	371,502
Non vested balance at beginning of period (in dollars per share)	$ 4.34	$ 4.29
Granted (in dollars per share)	$ 5.83	$ 5.13
Forfeited (in dollars per share)	$ 4.60	$ 4.31
Vested (in dollars per share)	$ 3.22	$ 5.07
Non vested balance at end of period (in dollars per share)	$ 5.09	$ 4.34