Investments (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Interest and Dividend Income, Operating	$ 16,034	$ 16,615	$ 15,450
Investment expenses	(741)	(735)	(601)
Investment income, net of expenses	15,293	15,880	14,849
US Treasury Securities and Obligation [Member]
Interest and Dividend Income, Operating	53	115	71
Corporate Bond Securities [Member]
Interest and Dividend Income, Operating	4,218	3,851	3,905
Collateralized Corporate Bank Loans [Member]
Interest and Dividend Income, Operating	5,261	5,284	4,149
Municipal Bonds [Member]
Interest and Dividend Income, Operating	5,616	6,632	6,259
Collateralized Mortgage Backed Securities [Member]
Interest and Dividend Income, Operating	106	86	35
Equity Securities Financial Services [Member]
Interest and Dividend Income, Operating	70	89	335
Equity Securities, Other [Member]
Interest and Dividend Income, Operating	464	395	501
Cash and Cash Equivalents [Member]
Interest and Dividend Income, Operating	$ 246	$ 163	$ 195