Fair Value Measurements (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Fair Value Disclosures [Abstract]
Unrealized gain on available for sale marketable securities, net of taxes	$ 3	[1]	$ 1
Proceeds from available for sale municipal bonds	758		871
Realized gain on other income, investment and interest	$ 3		$ 1

[1] All amounts are net of tax.