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Leases (Schedule Of Supplemental Balance Sheet Information Related To Leases) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Leases [Abstract]    
Operating lease right-of-use assets $ 24,160  
Accumulated amortization (1,199)  
Operating lease right-of-use assets, net 22,961 $ 0
Current maturities of operating leases 4,982  
Non-current operating lease obligations 19,902 $ 0
Total operating lease liabilities 24,884  
Finance leases, Property and equipment, at cost 7,530  
Finance leases, Accumulated amortization (1,075)  
Finance leases, property and equipment, net 6,455  
Current maturities of finance leases 678  
Non-current maturities of finance leases 5,690  
Total finance lease liabilities $ 6,368  
Weighted average remaining lease term (in years): Operating leases 6 years 2 months 12 days  
Weighted average remaining lease term (in years): Finance leases 11 years 2 months 12 days  
Weighted average discount rate: Operating leases 5.50%  
Weighted average discount rate: Finance leases 2.00%