Low Income Housing Tax Credits and Other Tax Credit Investments - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Investments In Affordable Housing Projects [Line Items]
Tax credit investments	$ 223,400,000	$ 131,300,000
Renewable Energy Program
Investments In Affordable Housing Projects [Line Items]
Equity investments	2,200,000	2,600,000
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