Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Forward contracts
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gains (losses) realized due to changes in fair value of loans	$ 2,100	$ 530	$ (1,000)	$ 481
Noninterest income | Residential mortgage loans held for sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gains (losses) realized due to changes in fair value of loans	$ 425	$ 887	$ 9,200	$ 1,600