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Commitments And Contingencies (Schedule Of Future Minimum Operating Lease Payments) (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Commitments And Contingencies [Abstract]  
2017, Operating Leases $ 4,470
2018, Operating Leases 4,779
2019, Operating Leases 4,722
2020, Operating Leases 4,127
2021, Operating Leases 3,647
Thereafter, Operating Leases 3,788
Total minimum lease payments 25,533
2017, Sublease Income 375
2018, Sublease Income 512
2019, Sublease Income 525
2020, Sublease Income 538
2021, Sublease Income 552
Total minimum sublease income $ 2,502