Derivatives, Hedging Activities, and Other Financial Instruments - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Derivative [Line Items]
Collateral already posted, fair value	$ 27,100		$ 27,100		$ 46,500
Derivative liability	29,300		29,300		45,400
Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount	814,800		814,800		$ 725,900
Interest Rate Swap
Derivative [Line Items]
Gain (loss) in fair value adjustments	$ (23)	$ 46	$ 41	$ 349