Investments (Narrative) (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Maximum [Member]	Sep. 03, 2013 Other, Principally Real Estate [Member]
Gain (Loss) on Investments [Line Items]
Carrying Value, Assets				$ 1,300,000
Held-to-maturity securities, unrealized losses	0	0
Percent of investment portfolio below investment grade			4.00%
Other-than-temporary impairments, available-for-sale securities	0	87,000
Single largest loss position	424,000	457,000
Second largest loss position	110,000	39,000
Third largest loss position	$ 92,000	$ 27,000