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Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]  
Financial Instruments with Off-Balance-Sheet Risk
Financial instruments with off-balance-sheet risk were as follows:
March 31,
2024		December 31,
2023
Commitments to extend credit$12,027,630 $12,195,073 
Standby letters of credit416,084 438,635 
Deferred standby letter of credit fees2,750 2,912 
Commitments, Off-Balance-Sheet, Allowance for Credit Losses [Table Text Block]
The following table details activity in the allowance for credit losses on off-balance-sheet credit exposures.
Three Months Ended
March 31,
20242023
Beginning balance$51,751 $58,593 
Credit loss expense (benefit)2,000 (3,675)
Ending balance$53,751 $54,918 
Lease Commitments, Components of Lease Expense [Table Text Block] We lease certain office facilities and office equipment under operating leases. The components of total lease expense were as follows:
Three Months Ended
March 31,
20242023
Amortization of lease right-of-use assets$8,790 $8,765 
Short-term lease expense325 409 
Non-lease components (including taxes, insurance, common maintenance, etc.)3,549 3,381 
Total$12,664 $12,555