Stock Plans and Other Incentives - Option Activity and Other Plan Data (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding at beginning of period, Options	627,724	645,448
Granted, Options
Exercised, Options
Cancelled through cash settlement, Options	(8,862)
Forfeited/cancelled/expired, Options
Outstanding at end of period, Options	618,862	645,448
Options exercisable at end of period, Options	618,862	420,488
Options exercisable which can be settled in cash, Options	8,862	35,448
Outstanding at beginning of period, Weighted-Average Exercise Price	$ 9.05	$ 8.94
Granted, Weighted-Average Exercise Price
Exercised, Weighted-Average Exercise Price
Cancelled through cash settlement, Weighted-Average Exercise Price	$ (4.09)
Forfeited/cancelled/expired, Weighted-Average Exercise Price
Outstanding at end of period, Weighted-Average Exercise Price	$ 9.12	$ 8.94
Options exercisable at end of period, Weighted-Average Exercise Price	$ 9.12	$ 9.43
Options exercisable which can be settled in cash, Weighted-Average Exercise Price	$ 4.09	$ 4.67