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Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2025
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block] The following table summarizes the above financial instruments at the dates indicated:
March 31, 2025December 31, 2024
 (Dollars in thousands)
Commitments to extend credit$4,644,981 $4,663,314 
Loan exposures sold with recourse139,034 141,151 
Standby letters of credit25,461 24,863 
Deferred standby letter of credit fees202 213