Stock-Based Compensation - Summary of Stock Option Activity (Detail) (Stock Options [Member], USD $)	3 Months Ended
	Mar. 31, 2014
Stock Options [Member]
Summary Of Stock Option Activities [Line Items]
Options Outstanding, beginning balance, shares	1,461,559
Options Outstanding, Granted	7,500
Options Outstanding, Retention stock options converted to regular stock options	207,236
Options Outstanding, Exercised	(27,270)
Options Outstanding, Expired or cancelled	(243,050)
Options Outstanding, Forfeited	(3,250)
Options Outstanding, ending balance, shares	1,402,725
Options exercisable, ending balance, shares	495,374
Options Outstanding, beginning balance, Weighted Average Exercise Price	$ 8.40
Weighted Average Exercise Price, Granted	$ 8.69
Weighted Average Exercise Price, Retention stock options converted to regular stock options	$ 7.16
Weighted Average Exercise Price, Exercised	$ 7.28
Weighted Average Exercise Price, Expired or Cancelled	$ 10.98
Weighted Average Exercise Price, Forfeited	$ 8.18
Options Outstanding, Ending Balance, Weighted Average Exercise Price	$ 7.79
Options Outstanding, Exercisable at End of Year, Weighted Average Exercise Price	$ 8.88