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Commitments And Contingencies (Schedule Of Future Minimum Lease Payments for Capital Leases and Operating Leases) (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Commitments And Contingencies [Abstract]  
2019, Capital Leases $ 857
2020, Capital Leases 688
2021, Capital Leases 641
2022, Capital Leases 586
2023, Capital Leases 586
Thereafter, Capital Leases 4,099
Total minimum capital lease payments 7,457
Less amount representing interest 792
Present value of net minimum lease payments 6,665
Less current maturities 731
Capital lease obligations, less current maturities 5,934
2019, Operating Leases 6,122
2020, Operating Leases 5,555
2021, Operating Leases 4,758
2022, Operating Leases 2,461
2023, Operating Leases 1,456
Thereafter, Operating Leases 6,389
Total minimum operating lease payments 26,741
2019, Sublease Income 1,181
2020, Sublease Income 1,203
2021, Sublease Income 1,226
2022, Sublease Income 569
Total minimum sublease income $ 4,179