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Leases (Components Of Lease Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Lessee, Lease, Description [Line Items]        
Operating lease expense $ 4,701 $ 3,685 $ 11,562 $ 11,754
Short-term lease expense 12,881 15,393 39,492 42,828
Lease expense, gross 17,582 19,078 51,054 54,582
Less: Sublease income 198 193 590 573
Total lease expense $ 17,384 $ 18,885 $ 50,464 $ 54,009
Maximum        
Lessee, Lease, Description [Line Items]        
Short term lease, lease term     1 year