Earnings Per Share - Reconciliation of Denominator of Basic and Diluted Net Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Basic earnings per share:
Net income (loss) to common shareholders	$ 4,236	$ 4,290	$ 4,219	$ 4,204	$ (25,318)	$ (81)	$ 10,164	$ 2,650	$ 16,949	$ (12,585)	$ (17,382)
Weighted average number of common shares outstanding									14,203,099	6,589,971	6,079,668
Earnings per share, basic	$ 0.30	$ 0.30	$ 0.30	$ 0.30	$ (3.63)	$ 0.00	$ 1.56	$ 0.42	$ 1.19	$ (1.91)	$ (2.86)
Diluted earnings per share:
Net income (loss) to common shareholders	$ 4,236	$ 4,290	$ 4,219	$ 4,204	$ (25,318)	$ (81)	$ 10,164	$ 2,650	$ 16,949	$ (12,585)	$ (17,382)
Weighted average number of common shares outstanding									14,203,099	6,589,971	6,079,668
Dilutive potential common shares									21,621	0	0
Weighted average number of shares outstanding, diluted									14,224,720	6,589,971	6,079,668
Earnings per share, diluted	$ 0.30	$ 0.30	$ 0.30	$ 0.30	$ (3.63)	$ 0.00	$ 1.56	$ 0.42	$ 1.19	$ (1.91)	$ (2.86)
Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from weighted average shares outstanding									176,843	193,373	53,778
Warrants and Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from weighted average shares outstanding									51,673
Performance and Service Criteria Not Met | Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from weighted average shares outstanding									156,329