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Derivative Instruments - Hedge Derivatives (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 846,000	$ (1,109,000)	$ (80,000)
Loss (gain) on cash flow hedges reclassified from other comprehensive income into net income, net of tax	(9,645,000)	5,542,000	1,588,000
Amortization	1,600,000	2,300,000	2,700,000
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	10,000,000
Hedging derivative | Cash flow hedge
Derivative [Line Items]
Unrealized Gain (Loss) in Accumulated Other Comprehensive Income	(15,034,000)	65,426,000	(2,581,000)
Hedging derivative | Fair value hedge
Derivative [Line Items]
Amortization	3,500,000	4,300,000	2,700,000
Hedging derivative | Fair value hedge | Securities
Derivative [Line Items]
Derivative Instruments and Hedges, Assets	1,165,773,000	841,543,000
Fair Value Hedging Adjustment	24,672,000	67,314,000
Gain (Loss) on Fair Value Hedges Recognized in Earnings	42,642,000	(26,536,000)	(25,982,000)
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge	(42,642,000)	26,536,000	25,982,000
Notional	1,031,490,000	708,931,000
Fair Value Hedges, Net	(24,672,000)	(67,314,000)
Hedging derivative | Fair value hedge | Securities | LIBOR
Derivative [Line Items]
Forecasted Notional Amount of Interest Rate Derivatives	471,700,000
Hedging derivative | Fair value hedge | Securities | Federal Funds Rate
Derivative [Line Items]
Forecasted Notional Amount of Interest Rate Derivatives	559,800,000
Hedging derivative | Fair value hedge | Loans
Derivative [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	0	0	(6,915,000)
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge	0	0	6,915,000
Asset derivatives | Hedging derivative | Cash flow hedge
Derivative [Line Items]
Unrealized Gain (Loss) in Accumulated Other Comprehensive Income	$ (15,034,000)	62,979,000	(1,432,000)
Description of Location of Interest Rate Derivatives on Balance Sheet	Other assets
Pay Rate (as percent)	0.00%
Receive Rate	2.25% minus 1 month LIBOR
Notional	$ 0	1,500,000,000
Cash Flow Hedges Derivative Instruments at Fair Value, Net	$ 0	124,585,000
Weighted Average Remaining Maturity Derivative	0 years
Asset derivatives | Hedging derivative | Fair value hedge | Securities
Derivative [Line Items]
Description of Location of Interest Rate Derivatives on Balance Sheet	Other assets
Pay Rate (as percent)	0.59%
Notional	$ 559,820,000	231,421,000
Weighted Average Remaining Maturity Derivative	5 years 3 months 18 days
Derivative, Underlying Basis	Federal funds
Fair Value Hedge Assets	$ 15,109,000	4,696,000
Liability derivatives | Hedging derivative | Cash flow hedge
Derivative [Line Items]
Unrealized Gain (Loss) in Accumulated Other Comprehensive Income	$ 0	2,447,000	$ (1,149,000)
Liability derivatives | Hedging derivative | Fair value hedge | Securities
Derivative [Line Items]
Description of Location of Interest Rate Derivatives on Balance Sheet	Other liabilities
Pay Rate (as percent)	3.08%
Notional	$ 471,670,000	477,510,000
Weighted Average Remaining Maturity Derivative	5 years 10 days
Derivative, Underlying Basis	3 month LIBOR
Fair Value Hedge Liabilities	$ (39,781,000)	$ (72,010,000)

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Fixed interest rate related to the interest rate 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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