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Derivative Financial Instruments - Interest Rate Swaps Not Designated as Hedges (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Interest rate swap
Gains and losses on these derivative assets and liabilities recorded in non-interest expense in the unaudited Consolidated Statements of Income
Cash pledged to secure obligations	$ 26,500		$ 27,300
Interest rate swap | Not designated as hedging
Derivative Financial Instruments
Variable rate, commercial loans that are supported by the interest rate swap contracts	492,600		491,400
Notional Amount, Derivative Asset	492,590		491,356
Notional Amount, Derivative Liability	492,590		491,356
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other assets	16,547		20,098
Fair value recorded in other liabilities	16,547		20,098
Interest rate swaps - pay floating, receive fixed | Not designated as hedging
Derivative Financial Instruments
Notional Amount, Derivative Asset	119,622		404,572
Notional Amount, Derivative Liability	372,968		86,784
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other assets	3,467		17,839
Fair value recorded in other liabilities	13,080		2,259
Interest rate swaps - pay fixed, receive floating | Not designated as hedging
Derivative Financial Instruments
Notional Amount, Derivative Asset	372,968		86,784
Notional Amount, Derivative Liability	119,622		404,572
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other assets	13,080		2,259
Fair value recorded in other liabilities	3,467		$ 17,839
Non-interest expense | Interest rate swap
Gains and losses on these derivative assets and liabilities recorded in non-interest expense in the unaudited Consolidated Statements of Income
Gain (loss) pay, floating receive fixed	(3,550)	$ (10,595)
Gain (loss) pay fixed receive floating	$ 3,550	$ 10,595

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

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Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.

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