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Derivative Financial Instruments (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) derivative	Sep. 30, 2024 USD ($) derivative	Sep. 30, 2025 USD ($) derivative	Sep. 30, 2024 USD ($) derivative	Dec. 31, 2024 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount, Assets	$ 1,270,562		$ 1,270,562		$ 1,998,266
Short term advances and brokered CD's	905,800		$ 905,800		950,800
Number of derivative contracts terminated | derivative			0
Customer [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments	553,200		$ 553,200		486,900
Bank [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments	553,200		553,200		486,900
Customer and Bank [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments	1,100,000		1,100,000		973,900
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from accumulated other comprehensive loss to interest expense	$ 2,400	$ 6,600	9,800	$ 19,900
Amount to be reclassified from the accumulated comprehensive income (loss) into earnings			1,600
Number of derivative contracts terminated | derivative	0	0		7
Income recognized	$ 100	$ 200	400	$ 1,200
Gain (loss) on termination of swaps				$ 1,700
Notional amount	420,800		420,800
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount, Assets	647,300		647,300		695,600
Interest rate swaps | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount, Assets	553,238		553,238		486,929
Interest rate swaps | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount, Assets	205,000		205,000		950,750
Interest rate swaps | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount, Assets	412,324		412,324		560,587
Interest rate floor options | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount, Assets	100,000		100,000
Portfolio Layer Hedges on Closed Portfolio of Securities Available for Sale [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	100,000		100,000
Portfolio Layer Hedges on Closed Portfolio of Loans [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount, Assets	480,000		480,000		500,000
Notional amount	$ 480,000		$ 480,000		$ 500,000

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The amount of gain loss on termination of swaps.

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Nominal or face amount used to calculate payments on the derivative asset.

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The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings.

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Fair value as of the balance sheet date of interest rate derivative assets, net of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized on the balance sheet.

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Amount before tax of reclassification adjustments of other comprehensive income (loss).

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