Short-Term Borrowings and Long-Term Debt - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) trust	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
FHLB advances borrowing capacity		$ 9,900,000
FHLB advances		$ 3,500,000	$ 0
Junior subordinated debt
Debt Instrument [Line Items]
Number of statutory business trusts formed for the purpose of issuing junior subordinated debt to third party investors | trust		1
Repayments of subordinated debt	$ 117,000
Junior subordinated debenture owed to unconsolidated subsidiary trust		$ 35,000
Trust preferred securities		$ 1,000