Derivative Financial Instruments - Interest Rate Swaps Not Designated as Hedges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
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	$ 26,300	$ 36,000
Interest rate swap | Not designated as hedging
Derivative Financial Instruments
Variable rate, commercial loans that are supported by the interest rate swap contracts	491,400	395,000
Notional Amount, Derivative Asset	491,356	394,954
Notional Amount, Derivative Liability	491,356	394,954
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other assets	20,098	32,685
Fair value recorded in other liabilities	20,098	32,685
Interest rate swaps - pay floating, receive fixed | Not designated as hedging
Derivative Financial Instruments
Notional Amount, Derivative Asset	404,572	394,954
Notional Amount, Derivative Liability	86,784
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other assets	17,839	32,685
Fair value recorded in other liabilities	2,259
Interest rate swaps - pay fixed, receive floating | Not designated as hedging
Derivative Financial Instruments
Notional Amount, Derivative Asset	86,784
Notional Amount, Derivative Liability	404,572	394,954
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other assets	2,259
Fair value recorded in other liabilities	17,839	32,685
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	(12,587)	20,331	$ 10,915
Gain (loss) pay fixed receive floating	$ 12,587	$ (20,331)	$ (10,915)