Securities - Narrative (Details)	3 Months Ended	12 Months Ended
Mar. 31, 2025 USD ($) security	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss positions \| security	2,082,000		2,115,000
Unrealized loss positions	$ 1,800,000,000		$ 1,800,000,000
Percentage of portfolio	86.00%		86.00%
Allowance for credit losses for available for sale debt securities	$ 0		$ 0
Allowance for credit losses for held to maturity debt securities	140,000	$ 158,000	158,000	$ 157,000
Investment securities, held to maturity	1,843,991,000		1,867,848,000
Accrued interest receivable on available for sale debt securities	12,400,000		12,700,000
Debt securities, held-to-maturity, amortized cost, after allowance for credit loss, transfer, amount	4,600,000
Fair value of transferred securities	4,100,000
Debt security, held-to-maturity, sold, realized gain (loss)	(400,000)
Tax benefit from the sale of securities available for sale	100,000	$ 0
State and municipal
Schedule of Available-for-sale Securities [Line Items]
Investment securities, held to maturity	1,039,749,000		1,048,862,000
State and municipal \| Internally-Assigned Rating Methodology
Schedule of Available-for-sale Securities [Line Items]
Investment securities, held to maturity	$ 119,100,000		$ 125,000,000.0

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