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Commitments and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]  
Financial Instruments with Off-Balance-Sheet Risk
Financial instruments with off-balance-sheet risk were as follows:
June 30,
2024		December 31,
2023
Commitments to extend credit$11,908,533 $12,195,073 
Standby letters of credit404,673 438,635 
Deferred standby letter of credit fees2,614 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
June 30,		Six Months Ended
June 30,
2024202320242023
Beginning balance$53,751 $54,918 $51,751 $58,593 
Credit loss expense (benefit)51 (2,037)2,051 (5,712)
Ending balance$53,802 $52,881 $53,802 $52,881 
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
June 30,		Six Months Ended
June 30,
2024202320242023
Amortization of lease right-of-use assets$8,829 $8,747 $17,619 $17,512 
Short-term lease expense394 493 719 902 
Non-lease components (including taxes, insurance, common maintenance, etc.)3,466 3,662 7,015 7,043 
Total$12,689 $12,902 $25,353 $25,457