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Derivative Instruments - Hedge Derivatives (Details) - USD ($)		1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 13, 2022	Apr. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Derivative [Line Items]
Net gain on cash flow hedges reclassified from other comprehensive income into net income, net of tax			$ (2,477,000)	$ (4,338,000)	$ (7,497,000)	$ (6,526,000)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months					9,900,000
Hedging derivative | Cash flow hedge
Derivative [Line Items]
Notional Amount	$ 1,800,000,000
Derivative, Cost of Hedge	$ 95,700,000
Cash flow hedge | Hedging derivative | Asset derivatives
Derivative [Line Items]
Derivative Asset, Statement of Financial Position							Other assets
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss)			0	0	0	(15,034,000)
Fair value hedge | Hedging derivative
Derivative [Line Items]
Forecasted Notional Amount			1,420,724,000		1,420,724,000		$ 1,031,490,000
Fair Value Hedge Assets			107,428,000		107,428,000		(24,672,000)
Fair value hedge | Hedging derivative | Securities
Derivative [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings		$ 986,000,000	67,917,000	3,850,000	132,100,000	30,524,000
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge			(67,917,000)	(3,850,000)	(132,100,000)	(30,524,000)
Derivative Instruments and Hedges, Assets			1,397,792,000		1,397,792,000		1,165,773,000
Fair Value Hedging Adjustment			(107,428,000)		(107,428,000)		24,672,000
Gain (Loss) on Fair Value Hedges Recognized in Earnings		12,000,000
Fair value hedge | Hedging derivative | Securities | Asset derivatives
Derivative [Line Items]
Forecasted Notional Amount			$ 1,420,724,000		$ 1,420,724,000		559,820,000
Derivative Asset, Statement of Financial Position			Other assets		Other assets
Weighted Average Remaining Maturity					7 years 8 months 4 days
Pay Rate (as percent)			5.07%		5.07%
Derivative, Type of Interest Rate Paid on Swap					3 month LIBOR/ Federal Funds/ SOFR
Fair Value Hedge Assets			$ 107,428,000		$ 107,428,000		15,109,000
Terminated Notional Amount of Interest Rate Derivatives		164,300,000
Terminated Fair Value Amount of Interest Rate Derivatives		$ 14,300,000
Fair value hedge | Hedging derivative | Securities | Liability derivatives
Derivative [Line Items]
Forecasted Notional Amount			$ 0		$ 0		471,670,000
Weighted Average Remaining Maturity					0 years
Pay Rate (as percent)			0.00%		0.00%
Derivative, Type of Interest Rate Paid on Swap					N/A
Fair Value Hedge Assets			$ 0		$ 0		$ (39,781,000)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]			Other liabilities		Other liabilities		Other liabilities
Fair value hedge | Hedging derivative | Securities | Federal Funds Rate
Derivative [Line Items]
Forecasted Notional Amount			$ 392,200,000		$ 392,200,000
Fair value hedge | Hedging derivative | Securities | Secured Overnight Financing Rate
Derivative [Line Items]
Forecasted Notional Amount			563,800,000		563,800,000
Fair value hedge | Hedging derivative | Loans
Derivative [Line Items]
Amortization expense, reduction to interest income on loans			$ 408,000	$ 726,000	$ 1,600,000	$ 2,600,000

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The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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The premium (cost) of a hedge, expensed during the period.

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Fixed interest rate related to the interest rate derivative.

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Carrying amount as of the balance sheet date of the asset arising from derivative instruments and hedging activities, which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer.

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Nominal or face amount used to calculate payment on derivative.

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Reference to the index or unit of measurement for the underlying which establishes the pricing terms of the derivative instrument. For example, the basis on the underlying for a natural gas futures contract might be the NYMEX price per million British thermal units (MMBtu).

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Net fair value of all derivative instruments designated as fair value hedging instruments.

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Amount of unrealized gain (loss) included in earnings related to the fair value of the hedged item in an interest rate fair value hedge, offset by the gain (loss) on the hedging instrument to the extent that the fair value hedge is determined to be effective.

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Amount of unrealized gain (loss) related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective.

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