Investments - Narrative (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Investments, Debt and Equity Securities [Abstract]
Vertical risk retention interest	5.00%
Trading investments	$ 54,840	$ 54,481
Number of government sponsored securities with unrealized losses | security	194	213
Number of mortgage-backed securities | security	278	248
Par value of mortgage-backed securities pledged to FRB	$ 610,000	$ 612,000
Non-marketable securities investment	24,000	14,000
Low income housing tax credit investments	84,000	72,000
Liability for unfunded commitments	33,000	30,000
Low income housing tax credit investments, tax credits and benefits (less than)	$ 2,000	$ 11,000
Low income housing tax credit investments, expected tax benefits recognized	25.00%