Leases (Components Of Lease Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 3,685	$ 3,660	$ 11,754	$ 11,085
Short-term lease expense	15,393	17,951	42,828	57,377
Lease expense, gross	19,078	21,611	54,582	68,462
Less: Sublease income	193	176	573	522
Total lease expense	$ 18,885	$ 21,435	$ 54,009	$ 67,940
Maximum
Lessee, Lease, Description [Line Items]
Short term lease, lease term			1 year