Option Activity and Weighted-Average Exercise Price (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Shares
Outstanding at beginning of period	525,799	918,569	770,000
Granted	389,569	165,000	148,569
Replacement awards issued	22,581
Exercised	(44,988)
Forfeited	(158,240)	(557,770)
Outstanding at end of period	734,721	525,799	918,569
Exercisable at end of period	526,667	259,131	256,664
Weighted Average Exercise Price
Outstanding at beginning of period	$ 12.16	$ 12.01	$ 11.42
Granted	$ 13.72	$ 11.54	$ 15.09
Replacement awards issued	$ 12.65
Exercised	$ 12.00
Forfeited	$ 13.41	$ 11.80
Outstanding at end of period	$ 12.73	$ 12.16	$ 12.01
Exercisable at end of period	$ 12.00	$ 12.46	$ 11.42