Available for Sale Securities (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 security	Mar. 31, 2013	Dec. 31, 2013 security
Available-for-sale Securities [Abstract]
Number of available-for-sale securities in unrealized loss position	8		5
Available-for-sale securities in unrealized loss position, 12 months or longer, unrealized losses	$ 23		$ 14
Available-for-sale securities in unrealized loss position, 12 months or longer, fair value	1,304		923
Purchases of available-for-sale debt securities	2,429	0
Proceeds from maturities of available-for-sale debt securities	0	12
Proceeds from sale of available-for-sale debt securities	2,601	2,590
Gain (loss) on sale of available-for-sale securities	$ 5	$ 33