Tax Credit Equity Investments (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Decrease in Retained earnings	$ (1,019,033,000)		$ (1,019,033,000)		$ (959,604,000)
Decrease in other assets	(240,817,000)		(240,817,000)		(266,416,000)
Tax credit investment balances	41,900,000		41,900,000
Unfunded commitments	6,700,000		6,700,000
Amortization	1,400,000	$ 500,000	2,900,000	$ 1,600,000
Tax credits and other tax benefits recognized	$ 1,700,000		3,500,000
Impairment losses			$ 0
Low income housing, tax credits		500,000		1,600,000
Low income housing partnerships and other investments		$ 3,800,000		$ 3,800,000
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2023-02
Schedule of Equity Method Investments [Line Items]
Decrease in Retained earnings					1,000,000
Decrease in other assets					$ 1,000,000