Derivative Financial Instruments - Interest Rate Swaps Not Designated as Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Interest rate swap | Not designated as hedging
Derivative Financial Instruments
Variable rate, commercial loans that are supported by the interest rate swap contracts	$ 443,800		$ 443,800		$ 491,400
Notional Amount, Derivative Asset	443,829		443,829		491,356
Notional Amount, Derivative Liability	443,829		443,829		491,356
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other assets	23,559		23,559		20,098
Fair value recorded in other liabilities	23,559		23,559		20,098
Interest rate swaps - pay floating, receive fixed | Not designated as hedging
Derivative Financial Instruments
Notional Amount, Derivative Asset	74,892		74,892		404,572
Notional Amount, Derivative Liability	368,937		368,937		86,784
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other assets	1,798		1,798		17,839
Fair value recorded in other liabilities	21,761		21,761		2,259
Interest rate swaps - pay fixed, receive floating | Not designated as hedging
Derivative Financial Instruments
Notional Amount, Derivative Asset	368,937		368,937		86,784
Notional Amount, Derivative Liability	74,892		74,892		404,572
Fair values of derivative assets and liabilities recorded in consolidated balance sheets
Fair value recorded in other assets	21,761		21,761		2,259
Fair value recorded in other liabilities	1,798		1,798		$ 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	7,025	$ 1,264	3,475	$ (9,331)
Gain (loss) pay fixed receive floating	$ (7,025)	$ (1,264)	$ (3,475)	$ 9,331