Earnings Per Share - Schedule of Earnings Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]
Income available to common shareholders	$ 47,916	$ (4,458)	$ 2,919
Income available to common shareholders plus assumed conversions	47,916		2,919
Loss available to common shareholders		$ (4,458)
Income available to common shareholders, Shares	19,449,560	18,748,757	18,702,397
Employee restricted stock (See Note J), Shares	200,445		57,818
Income available to common shareholders plus assumed conversions, Shares	19,650,005	18,748,757	18,760,215
Loss available to common shareholders, Shares		18,748,757
Income available to common shareholders, Per Share	$ 2.46	$ (0.24)	$ 0.16
Income available to common shareholders plus assumed conversions, Per Share	$ 2.44	$ (0.24)	$ 0.16
Loss available to common shareholders, Per Share		$ (0.24)