Securities, Held to Maturity (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Held-to-maturity securities, fair value to amortized cost [Abstract]
Amortized cost	$ 842,921	$ 905,267
Unrealized gains	42	271
Unrealized losses	(93,018)	(91,014)
Estimated fair value	749,945	814,524
Transactions of HTM securities [Abstract]
Gains from calls on HTM securities	0	0	$ 4
Asset Pledged as Collateral [Member] \| Public Deposits and Other Purposes [Member]
Securities pledged [Abstract]
AFS and HTM securities	1,600,000	2,030,000
Asset Pledged as Collateral [Member] \| Securities Sold under Repurchase Agreements [Member]
Securities pledged [Abstract]
AFS and HTM securities	234,200	177,200
Federal Agency [Member]
Held-to-maturity securities, fair value to amortized cost [Abstract]
Amortized cost	100,000	100,000
Unrealized gains	0	0
Unrealized losses	(16,656)	(17,784)
Estimated fair value	83,344	82,216
Mortgage-backed Securities, Government-Sponsored Enterprises [Member]
Held-to-maturity securities, fair value to amortized cost [Abstract]
Amortized cost	208,579	228,720
Unrealized gains	0	0
Unrealized losses	(34,349)	(31,613)
Estimated fair value	174,230	197,107
Mortgage-Backed, U.S. Government Agency Securities [Member]
Held-to-maturity securities, fair value to amortized cost [Abstract]
Amortized cost	15,611	17,086
Unrealized gains	1	3
Unrealized losses	(516)	(566)
Estimated fair value	15,096	16,523
Collateralized Mortgage Obligations, Government-Sponsored Enterprises [Member]
Held-to-maturity securities, fair value to amortized cost [Abstract]
Amortized cost	168,018	187,457
Unrealized gains	0	57
Unrealized losses	(11,554)	(12,021)
Estimated fair value	156,464	175,493
Collateralized Mortgage Obligations, U.S. Government Agency Securities [Member]
Held-to-maturity securities, fair value to amortized cost [Abstract]
Amortized cost	60,906	63,878
Unrealized gains	0	0
Unrealized losses	(11,245)	(10,908)
Estimated fair value	49,661	52,970
State & Municipal [Member]
Held-to-maturity securities, fair value to amortized cost [Abstract]
Amortized cost	289,807	308,126
Unrealized gains	41	211
Unrealized losses	(18,698)	(18,122)
Estimated fair value	$ 271,150	$ 290,215

Gains from calls (requests of early payments) on debt securities which are classified as held-to-maturity securities.

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Amount, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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