Preferred Stock and Warrants (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Preferred Stock and Warrants [Abstract]
Aggregate consideration	$ 28,000,000
Subsidiary, Sale of Stock [Line Items]
Shares issued for cash during period (in shares)	28,000
Warrants to purchase shares	500,000
Quarterly cumulative cash dividends for first five years	5.00%
Preferred Stock Dividend Rate Thereafter Five Years	9.00%
Preferred stock, redemption date	Feb. 15, 2012
Liquidation preference	$ 1,000
Accumulated dividends in arrears	884,000
Maximum number of preferred dividend deferment periods	6
Exercise price (in dollars per share)	$ 8.40
Aggregate proceeds to the preferred stock	27,220,000
Aggregate proceeds to the warrant	$ 780,000
Period for warrant proceeds accretion to retained earnings	5 years