Fair Value - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Outstanding balances in impaired loans	$ 41,200	$ 55,800
Impaired loans, related allowance	5,500	6,400
Foreclosed assets re-measured after initial recognition	15,000	19,200
Write-downs of allowance for foreclosed assets after initial recognition	2,400	873
Noninterest gain (loss) Mortgage banking, net for changes in fair value of LHFS	1,500	1,400	$ 3,000
Interest earned on LHFS included in Interest and fees on LHFS and LHFI	5,900	4,900	$ 4,900
GNMA optional repurchase loans	$ 57,062	$ 61,564