Investments, Part II (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Carrying Value [Abstract]
Due in one year or less	$ 501
Due after one year through five years	6,836
Due after five years through ten years	32,739
Due after ten years	182,292
Varying maturities	1,171
Totals	223,539	230,508
Amortized Cost [Abstract]
Due in one year or less	500
Due after one year through five years	6,150
Due after five years through ten years	29,929
Due after ten years	161,982
Varying maturities	994
Totals	$ 199,555