Commitments and Contingencies (Schedule Of Minimum Future Rental Commitments Under Non-Cancelable Leases) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments and Contingencies [Abstract]
2013	$ 2,322,000
2014	2,364,000
2015	2,381,000
2016	2,297,000
2017	2,336,000
Thereafter	28,221,000
Total	39,921,000
Rent expense	$ 2,200,000	$ 2,100,000	$ 1,900,000