Low Income Housing Tax Credits and Other Tax Credit Investments - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Investments In Affordable Housing Projects [Line Items]
Tax credit investment	$ 227,700,000	$ 223,400,000
Renewable Energy Program
Investments In Affordable Housing Projects [Line Items]
Equity investments	2,100,000	2,200,000
Outstanding investment commitments	$ 0	$ 0
Low Income Housing Tax Credit and Other Tax Credit Investments
Investments In Affordable Housing Projects [Line Items]
Tax credit period of benefits	15 years
Operating loss tax benefits period	15 years