Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Fixed income securities available-for-sale, amortized cost (in Dollars)	$ 665,891	$ 665,761
Common stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	22,327,749	22,025,450
Common stock, shares outstanding	22,327,749	22,025,450
Series A Preferred Stock [Member]
Preferred stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	750,000	750,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Undesignated Preferred Stock [Member]
Preferred stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0