Short and Long-Term Funding (Tables)

3 Months Ended

Mar. 31, 2025

Debt Disclosure [Abstract]

Schedule of Debt [Table Text Block]

The following table presents the components of short-term funding (funding with original contractual maturities of one year or less), and long-term funding (funding with original contractual maturities greater than one year):

($ in thousands)	Mar 31, 2025		Dec 31, 2024
Short-term funding
Federal funds purchased	$	225,385	$	370,325
Securities sold under agreements to repurchase	85,950		100,044
Federal funds purchased and securities sold under agreements to repurchase	311,335		470,369
Long-term funding
Corporation senior notes, at par	$	300,000	$	300,000
Corporation subordinated notes, at par	300,000		550,000
Discount and capitalized costs	(8,369)		(8,664)
Subordinated debt fair value hedge(a)	(521)		(3,996)
Finance leases	273		295
Total long-term funding	$	591,382	$	837,635
Total short and long-term funding, excluding FHLB advances	$	902,718	$	1,308,004
FHLB advances
Short-term FHLB advances	$	1,420,000	$	1,250,000
Long-term FHLB advances	611,519		611,551
FHLB advances fair value hedge(a)	(4,222)		(7,744)
Total FHLB advances	$	2,027,297	$	1,853,807
Total short and long-term funding	$	2,930,015	$	3,161,811

(a) For additional information on the fair value hedges, see Note 9.

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block]

The remaining contractual maturity of the securities sold under agreements to repurchase on the consolidated balance sheets is presented in the following table:

	Overnight and Continuous
($ in thousands)	Mar 31, 2025		Dec 31, 2024
Repurchase agreements
Agency mortgage-related securities	$	85,950	$	100,044