Computations for Basic and Diluted Earnings/(Loss) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Basic:
Net (loss) income	$ 3,321	$ (8,534)	$ 4,363	$ 929	$ (3,185)	$ 9,543	$ (739)	$ 377	$ 79	$ 5,996	$ (2,728)
Less: preferred stock dividends									2,185	1,359	534
Net (loss) income available to common shareholders	2,370	(9,480)	4,363	641	(3,502)	9,215	(1,053)	(23)	(2,106)	4,637	(3,262)
Weighted average common shares outstanding									15,286,834	11,703,331	10,646,511
Basic (loss) earnings per common share	$ 0.13	$ (0.53)	$ 0.36	$ 0.05	$ (0.30)	$ 0.79	$ (0.09)		$ (0.14)	$ 0.40	$ (0.31)
Diluted:
Net (loss) income available to common shareholders									(2,106)	4,637	(3,262)
Weighted average common shares outstanding for basic (loss) earnings per common share									15,286,834	11,703,331	10,646,511
Average shares and dilutive common shares									15,286,834	11,712,507	10,646,511
Diluted (loss) earnings per common share	$ 0.12	$ (0.53)	$ 0.36	$ 0.05	$ (0.30)	$ 0.79	$ (0.09)		$ (0.14)	$ 0.40	$ (0.31)
Stock Award
Diluted:
Add: Dilutive effects										9,176
Common Stock
Basic:
Net (loss) income									75	5,442	(2,461)
Less: preferred stock dividends									2,070	1,234	482
Net (loss) income available to common shareholders									(1,995)	4,208	(2,943)
Weighted average common shares outstanding									14,481,060	10,622,577	9,605,006
Basic (loss) earnings per common share									$ (0.14)	$ 0.40	$ (0.31)
Diluted:
Net (loss) income available to common shareholders									(1,995)	4,208	(2,943)
Weighted average common shares outstanding for basic (loss) earnings per common share									14,481,060	10,622,577	9,605,006
Average shares and dilutive common shares									14,481,060	10,631,753	9,605,006
Diluted (loss) earnings per common share									$ (0.14)	$ 0.40	$ (0.31)
Common Stock | Stock Award
Diluted:
Add: Dilutive effects										9,176
Class B Common Stock
Basic:
Net (loss) income									4	554	(267)
Less: preferred stock dividends									115	125	52
Net (loss) income available to common shareholders									(111)	429	(319)
Weighted average common shares outstanding									805,774	1,080,754	1,041,505
Basic (loss) earnings per common share									$ (0.14)	$ 0.40	$ (0.31)
Diluted:
Net (loss) income available to common shareholders									$ (111)	$ 429	$ (319)
Weighted average common shares outstanding for basic (loss) earnings per common share									805,774	1,080,754	1,041,505
Average shares and dilutive common shares									805,774	1,080,754	1,041,505
Diluted (loss) earnings per common share									$ (0.14)	$ 0.40	$ (0.31)