Leases (Supplemental Balance Sheet Information Related To Leases) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
ROU assets	$ 55,897	$ 40,156
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets	us-gaap:OtherAssets
Current lease liabilities	$ 7,661	$ 11,392
Long-term lease liabilities	51,336	31,900
Total lease liabilities	$ 58,997	$ 43,292
Weighted-average remaining lease term	12 years 6 months	5 years
Weighted-average discount rate	9.22%	5.96%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent