Employee Benefit Plans - Earnings Per Share (Details) - shares	1 Months Ended			12 Months Ended
	Jan. 31, 2014	Feb. 28, 2013	May 31, 2011	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share
Antidilutive shares excluded from calculation of diluted earnings per share				46,765,065	21,652,391	18,614,650
Number of warrants exercised (in shares)				119,879	26,882	23,918,429
Warrants issued in May, 2011
Earnings Per Share
Number of warrants issued (in shares)			7,128,563
Warrants issued in February, 2013
Earnings Per Share
Number of warrants issued (in shares)		23,637,500
Warrants issued in January, 2014
Earnings Per Share
Number of warrants issued (in shares)	4,000,000
Number of warrants exercised (in shares)				0	0	0
Restricted stock
Earnings Per Share
Antidilutive shares excluded from calculation of diluted earnings per share				13,333	204,444	473,336
Warrants
Earnings Per Share
Antidilutive shares excluded from calculation of diluted earnings per share				14,501,600	4,192,567	4,219,449
Preferred stock
Earnings Per Share
Antidilutive shares excluded from calculation of diluted earnings per share				17,490,078	5,554,594	5,554,594
Stock options
Earnings Per Share
Antidilutive shares excluded from calculation of diluted earnings per share				14,760,054	11,700,786	8,367,271