Commitments And Contingencies (Schedule Of Future Minimum Revenues Under Subleases) (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Commitments and Contingencies Disclosure [Abstract]
2016	$ 23,602
2017	21,483
2018	19,254
2019	14,835
2020	11,519
Thereafter	52,968
Total	$ 143,661