Preferred Stock (Details) (USD $)	3 Months Ended	1 Months Ended	3 Months Ended			1 Months Ended
	Mar. 31, 2012	Nov. 30, 2008 Series A Preferred Stock	Mar. 31, 2012 Series A Preferred Stock	Mar. 07, 2012 Series A Preferred Stock	Nov. 21, 2008 Series A Preferred Stock	Jun. 30, 2010 Series C Preferred Stock	Jun. 21, 2010 Series C Preferred Stock
Shareholders' equity
Preferred stock, shares issued		40,000				21,004
Value of stock issued		$ 40,000,000
Liquidation preference (in dollars per share)					$ 1,000		$ 1,000
Dividends received from HBC as approved by DFI			30,000,000
Accelerated accretion of remaining issuance discount				765,000
Reduction in amount of net income available to common shareholders due to dividend and discount accretion on preferred stock	$ 1,206,000		$ 1,206,000
Conversion price (in dollars per share)						$ 3.75