Preferred Stock (Details) (USD $)	0 Months Ended	6 Months Ended		0 Months Ended	1 Months Ended	3 Months Ended		1 Months Ended
	Jun. 12, 2013	Jun. 30, 2013	Jun. 30, 2012	Mar. 07, 2012 Series A Preferred Stock	Nov. 30, 2008 Series A Preferred Stock	Mar. 31, 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
Number of shares issuable upon exercise of warrant that has been repurchased	462,963
Exercise price of warrant (in dollars per share)	$ 12.96
Payments for repurchase of warrant	$ 140,000	$ 140,000
Conversion price (in dollars per share)								$ 3.75