Stockholders' Equity (Details) (USD $)	3 Months Ended	12 Months Ended			0 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2011	Dec. 31, 2010	Aug. 04, 2011	Mar. 06, 2015
Class of Stock [Line Items]
Liquidation preference per share	$ 1,000	$ 1,000
Securities purchase agreement, share repurchase amount	$ 11,879,000
Treasury's small business lending fund				30,000,000,000
Treasury's small business lending fund, maximum asset value, qualified banks				10,000,000,000
Period where dividend rate remains unchanged if preferred stock remains outstanding, in years	4 years 6 months
Preferred stock dividend rate	1.00%	1.00%	3.874%
Expected dividend rate at a fixed rate for a specified period	9.00%
Preferred shares outstanding						3,250
Noncumulative Preferred Stock [Member]
Class of Stock [Line Items]
Shares of perpetual preferred stock					13,000
Liquidation preference per share					$ 1,000
Aggregate proceeds					13,000,000
Redeemable Preferred Stock [Member]
Class of Stock [Line Items]
Liquidation preference per share						$ 1,000
Aggregate liquidation preference						$ 9,767,604.17
Shares redeemed						9,750
Minimum [Member]
Class of Stock [Line Items]
Expected dividend rate for the second through tenth dividend periods	1.00%
Expected dividend rate at a fixed rate for a specified period	1.00%
Maximum [Member]
Class of Stock [Line Items]
Expected dividend rate for the second through tenth dividend periods	5.00%
Expected dividend rate at a fixed rate for a specified period	7.00%