Earnings Per Share - Reconciliation of Denominator of Basic and Diluted Net Income Per Share (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Basic earnings per share:
Net loss to common shareholders	$ (25,318,000)	$ (81,000)	$ 10,164,000	$ 2,650,000	$ 2,154,000	$ 2,908,000	$ (20,887,000)	$ (1,557,000)	$ (12,585,107)	$ (17,382,132)	$ (3,193,377)
Weighted average number of common shares outstanding									19,769,912	18,239,004	16,129,640
Earnings per share, basic	$ (1.21)	$ 0	$ 0.52	$ 0.14	$ 0.11	$ 0.15	$ (1.16)	$ (0.10)	$ (0.64)	$ (0.95)	$ (0.20)
Diluted earnings per share:
Net loss to common shareholders	$ (25,318,000)	$ (81,000)	$ 10,164,000	$ 2,650,000	$ 2,154,000	$ 2,908,000	$ (20,887,000)	$ (1,557,000)	$ (12,585,107)	$ (17,382,132)	$ (3,193,377)
Weighted average number of common shares outstanding									19,769,912	18,239,004	16,129,640
Dilutive potential common shares									0	0	0
Weighted average number of shares outstanding, diluted									19,769,912	18,239,004	16,129,640
Earnings per share, diluted	$ (1.21)	$ 0	$ 0.52	$ 0.14	$ 0.11	$ 0.15	$ (1.16)	$ (0.10)	$ (0.64)	$ (0.95)	$ (0.20)
Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from weighted average shares outstanding									580,119	161,334
Warrants and Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from weighted average shares outstanding									249,667
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									598,172