Employee Benefit Plans (Details 5)	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 31, 2011	Feb. 28, 2013	Jan. 31, 2014
Earnings Per Share
Antidilutive shares excluded from calculation of diluted earnings per share	18,614,643	40,464,065	11,407,263
Warrants outstanding (in shares)	4,219,442
Warrants issued in May, 2011
Earnings Per Share
Number of warrants issued (in shares)				7,128,563
Number of warrants exercised (in shares)	22,776,023
Warrants issued in February, 2013
Earnings Per Share
Number of warrants issued (in shares)					23,637,500
Number of warrants exercised (in shares)	23,637,400
Warrants issued in January, 2014
Earnings Per Share
Number of warrants issued (in shares)						4,000,000
Number of warrants exercised (in shares)	0
Restricted stock
Earnings Per Share
Antidilutive shares excluded from calculation of diluted earnings per share	473,336	650,002
Warrants
Earnings Per Share
Antidilutive shares excluded from calculation of diluted earnings per share	4,219,442	24,137,878	9,421,008
Preferred stock
Earnings Per Share
Antidilutive shares excluded from calculation of diluted earnings per share	5,554,594	10,972,859
Stock options
Earnings Per Share
Antidilutive shares excluded from calculation of diluted earnings per share	8,367,271	4,703,326	1,986,255