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Short-Term Borrowings (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Short-Term Borrowings    
Secured borrowings $ 369,300 $ 151,400
Short-Term Borrowings    
Short-Term Borrowings    
Secured borrowings 369,300 151,400
Unused credit lines $ 323,212 $ 277,362
Short-Term Borrowings | Bottom of range    
Short-Term Borrowings    
Interest rate-secured borrowings 0.35% 0.32%
Short-Term Borrowings | Top of range    
Short-Term Borrowings    
Interest rate-secured borrowings 1.78% 0.38%