Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Financial Instruments with Off-Balance-Sheet Risk

Financial instruments with off-balance-sheet risk were as follows:

	March 31, 2023		December 31, 2022
Commitments to extend credit	$	12,129,547	$	12,137,957
Standby letters of credit	402,139		383,851
Deferred standby letter of credit fees	2,198		2,236

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,
	2023		2022
Beginning balance	$	58,593	$	50,314
Credit loss expense (benefit)	(3,675)		(4,464)
Ending balance	$	54,918	$	45,850

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,
	2023		2022
Amortization of lease right-of-use assets	$	8,765	$	8,105
Short-term lease expense	409		613
Non-lease components (including taxes, insurance, common maintenance, etc.)	3,381		3,020
Total	$	12,555	$	11,738