Fair Value Measurements (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Fair Value Disclosures [Abstract]
Unrealized gains/ (losses) from marketable securities	$ 0	$ (26,000)	$ 0	$ (82,000)
Proceeds from available for sale municipal bonds	3,000,000	4,274,000	3,000,000	14,871,000
Realized gain on other income, investment and interest	$ 16,000	$ 41,000	$ 16,000	$ 224,000