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Assets - Goodwill (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Changes in goodwill balances    
Gross carrying amount, beginning balance $ 430,331  
Acquisition 33,021  
Gross carrying amount, ending balance 463,352  
Accumulated impairment 248,388 $ 248,388
Net amount, beginning balance 181,943  
Net amount, ending balance $ 214,964