Stockholders' Equity (Narrative) (Details) (USD $)	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Class of Stock [Line Items]
Par value per share	$ 10.00	$ 10.00
Liquidation preference per share	$ 1,000	$ 1,000
Shares of common stock	186,311
Par value per share	$ 1.00	$ 1.00
Exercise price per share	9.46
Aggregate purchase price	$ 11,750,000
Aggregate liquidation preference	13,000,000
Treasury's small business lending fund	30
Securities purchase agreement, share repurchase amount	11,879,000
Securities purchase agreement, share repurchase paid in principal amount	11,750,000
Securities purchase agreement, share repurchase accured unpaid dividends amount	$ 128,900
Preferred stock dividend rate	3.874%
Expected dividend rate at a fixed rate for a specificed period	9.00%
Stock repurchase from treasury	458,000
Number of stock repurchase from treasury	186,311
Cumulative Preferred Stock [Member]
Class of Stock [Line Items]
Shares of perpetual preferred stock	11,750
Noncumulative Preferred Stock [Member]
Class of Stock [Line Items]
Shares of perpetual preferred stock	13,000
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 specificed 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 specificed period	7.00%