Schedule I - Condensed Financial Information (Details 2) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Feb. 07, 2006
Condensed Balance Sheets
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	3,475,000	3,475,000
Preferred stock, shares outstanding	0	3,475,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	8,715,580	9,109,663
Common stock, shares outstanding	8,715,580	9,109,663
Parent company
Condensed Balance Sheets
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	3,475,000
Preferred stock, shares outstanding	0	3,475,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	8,715,580	9,109,663
Common stock, shares outstanding	8,715,580	9,109,663