Stock Incentive Plans - Summary of the Non-vested Options (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014
Options
Options, Granted	19,800
Weighted-average exercise price
Weighted-average exercise price, Granted	$ 10.48
Weighted-average exercise price, Forfeited	$ 19.62
Non-vested options [Member]
Options
Options, Non-vested, Beginning balance	372,507
Options, Granted	19,800
Options, Vested	(81,853)
Options, Forfeited	(53,848)
Options, Non-vested, Ending balance	256,606
Weighted-average exercise price
Weighted-average exercise price, Beginning balance	$ 13.57
Weighted-average exercise price, Granted	$ 10.48
Weighted-average exercise price, Vested	$ 20.15
Weighted-average exercise price, Forfeited	$ 15.98
Weighted-average exercise price, Ending balance	$ 10.72