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Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash and Cash Equivalents        
Cash, demand deposits and checking accounts $ 217,181 $ 333,524    
Time deposits with less than three months maturity date 4,400 2,500    
Cash and cash equivalents $ 221,581 $ 336,024 $ 184,938 $ 101,055