Leases (Components Of Lease Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 3,387	$ 3,912	$ 6,861	$ 8,069
Short-term lease expense	12,692	12,991	26,611	27,435
Lease expense, gross	16,079	16,903	33,472	35,504
Less: Sublease income	198	190	392	380
Total lease expense	$ 15,881	$ 16,713	$ 33,080	$ 35,124
Maximum
Lessee, Lease, Description [Line Items]
Short term lease, lease term			1 year