Investments (Summary of Realized Gain (Loss) on Investments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Schedule of Investments [Line Items]
Gain (loss) on investments	$ 28	$ (23)	$ 5,881	$ 152
Other-than-temporary impairment	(363)		(2,193)	(274)
Net realized (losses) gains	$ (335)	$ (23)	$ 3,688	$ (122)
US Treasury Securities and Obligations of U.S. Government [Member]
Schedule of Investments [Line Items]
Gain (loss) on investments
Corporate Bonds [Member]
Schedule of Investments [Line Items]
Gain (loss) on investments		$ (22)		$ 111
Collateralized Corporate Bank Loans [Member]
Schedule of Investments [Line Items]
Gain (loss) on investments	$ 8	10	$ 158	99
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Gain (loss) on investments	(12)	(69)	(54)	(123)
Mortgage Backed [Member]
Schedule of Investments [Line Items]
Gain (loss) on investments		29	240	31
Equity Securities [Member]
Schedule of Investments [Line Items]
Gain (loss) on investments	$ 32	$ 29	$ 5,537	$ 34