Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Sep. 08, 2011	Dec. 31, 2016	Dec. 31, 2015	Jul. 22, 2015	Dec. 31, 2014
Preferred stock
Preferred stock, par value per share		$ 0.01	$ 0.01
Preferred stock, liquidation value per share			$ 1,000		$ 1,000
Series C Preferred Stock
Preferred stock
Preferred stock, liquidation value per share				$ 1,000
Preferred Stock Liquidation Preference Value				$ 57.4
Small Business Lending Fund (SBLF)
Preferred stock
SBLF Fund Pool	$ 30,000.0
Total assets threshold for SBLF Loan qualification, maximum	10,000.0
Small Business Lending Fund (SBLF) | Series C Preferred Stock
Preferred stock
Shares sold, aggregate purchase price	$ 57.4
Shares sold	57,366
Preferred stock, par value per share	$ 0.01
Preferred stock, liquidation value per share	$ 1,000
Tarp Warrant
Warrant
Warrant term (in years)		10 years
Number of shares issuable under warrant terms		895,968
Exercise price per share		$ 10.79