Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Tables)

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Summary of lending-related and other commitments

The following is a summary of lending-related commitments:

($ in thousands)	Mar 31, 2024		Dec 31, 2023
Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale(a)(b)	$	10,828,869	$	11,170,147
Commercial letters of credit(a)	4,580		3,697
Standby letters of credit(c)	230,396		212,029

(a) These off-balance sheet financial instruments are exercisable at the market rate prevailing at the date the underlying transaction will be completed and, thus, are deemed to have no current fair value, or the fair value is based on fees currently charged to enter into similar agreements and was not material at March 31, 2024 or December 31, 2023.

(b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 9.

(c) Standby letters of credit are presented excluding participations. The Corporation has established a liability of $2 million at both March 31, 2024 and December 31, 2023, as an estimate of the fair value of these financial instruments.

Schedule Of Unfunded Commitments [Table Text Block]

The following table presents a summary of the changes in the allowance for unfunded commitments:

($ in thousands)	Three Months Ended March 31, 2024		Year Ended December 31, 2023
Allowance for unfunded commitments
Balance at beginning of period	$	34,776	$	38,776
Provision for unfunded commitments	(3,000)		(4,000)
Balance at end of period	$	31,776	$	34,776