Fair Value Measurements (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Fair Value Disclosures [Abstract]
Unrealized gains/ (losses) from marketable securities	$ 0	$ 0	$ 0	$ (82,000)
Proceeds from available for sale municipal bonds	10,321,000	1,100,000	13,321,000	15,971,000
Realized gain on other income, investment and interest	$ 31,000	$ 0	$ 47,000	$ 224,000