Investments (Proceeds from Sales of Securities and Realized Gains and Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Investments [Abstract]
Proceeds	$ 616	$ 15,033	$ 56,838	$ 50,169
Realized gains	222	35	1,527	447
Realized losses	$ 75	$ 138	$ 434	$ 323