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

6 Months Ended

Jun. 30, 2022

Commitments and Contingencies Disclosure [Abstract]

Summary of lending-related and other commitments

The following is a summary of lending-related commitments:

($ in Thousands)	Jun 30, 2022		Dec 31, 2021
Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale(a)(b)	$	11,483,648	$	10,848,136
Commercial letters of credit(a)	5,152		5,992
Standby letters of credit(c)	274,324		248,292

Schedule Of Unfunded Commitments [Table Text Block]

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

($ in Thousands)	Six Months Ended June 30, 2022		Year Ended December 31, 2021
Allowance for Unfunded Commitments
Balance at beginning of period	$	39,776	$	47,776
Provision for unfunded commitments	(3,000)		(8,000)
Balance at end of period	$	36,776	$	39,776