Fair Value - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Outstanding balances in collateral dependent related to allowance for credit losses	$ 48,100		$ 48,100		$ 43,400
Collateral dependent related to allowance for credit losses	9,300		9,300		4,400
Foreclosed assets remeasured after initial recognition			5,400	$ 7,600
Write-downs of allowance for foreclosed assets after initial recognition			328	1,600
Noninterest gain (loss) Mortgage banking, net for changes in fair value of LHFS	(593)	$ 4,100	(8,900)	11,300
Interest earned on LHFS included in Interest and fees on LHFS and LHFI	1,700	$ 2,000	5,500	$ 4,800
Serviced GNMA loans eligible for repurchase	$ 88,000		$ 88,000		$ 141,200