Commitments And Contingencies (Schedule Of Annual Future Minimum Lease Payments For Capital Leases) (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Loss Contingencies [Line Items]
2013	$ 1,816,000
2014	1,825,000
2015	1,834,000
2016	1,843,000
2017	1,852,000
Thereafter	22,862,000
Total	32,032,000
Capital leased assets, total	16,800,000	16,800,000
Capital leased assets, accumulated depreciation	11,400,000	10,600,000
Future minimum payments, interest	11,000,000
Future minimum payments, present value of net minimum payments	$ 21,000,000