Leases (Schedule Of Supplemental Balance Sheet Information Related To Leases) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jan. 06, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease right-of-use assets	$ 58,429		$ 28,242
Accumulated amortization	(11,516)		(9,671)
Operating lease right-of-use assets, net	46,913	$ 23,300	18,571
Current maturities of operating leases	3,053		5,763
Non-current maturities of operating leases	45,765		14,034
Total operating lease liabilities	48,818		19,797
Finance leases, Property and equipment, at cost	6,910		7,620
Finance leases, Accumulated amortization	(2,014)		(1,905)
Finance leases, property and equipment, net	4,896		5,715
Current maturities of finance leases	537		614
Non-current maturities of finance leases	4,608		5,300
Total finance lease liabilities	$ 5,145		$ 5,914
Weighted average remaining lease term (in years): Operating leases	12 years 4 months 24 days		5 years 1 month 6 days
Weighted average remaining lease term (in years): Finance leases	9 years 1 month 6 days		9 years 9 months 18 days
Weighted average discount rate: Operating leases	5.90%		5.20%
Weighted average discount rate: Finance leases	2.00%		2.00%