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Investment Securities - Narrative (Details) $ in Thousands		1 Months Ended	12 Months Ended
	Apr. 02, 2025 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($) security	Dec. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available For Sale and Held to Maturity, Restricted			$ 229,200	$ 219,400
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security			167	299
Proceeds from sale of securities		$ 417,900	$ 1,133,470	$ 276,252	$ 0
Net gains (losses) on sales of securities available for sale		$ (38,900)	$ (37,700)	$ 936
Territorial
Debt Securities, Available-for-sale [Line Items]
Investments, available-for-sale securities	$ 18,530
Investments, held-to-maturity securities	516,665
Proceeds from sale of securities	$ 535,200
U.S. Government Agency and U.S. Government Sponsored Enterprises
Debt Securities, Available-for-sale [Line Items]
Percentage of portfolio			86.60%
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security			1	1
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security			5	6
Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security			28	57

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Available-for-Sale Securities

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Amount of unrealized and realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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