Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Impaired loans held-for-investment and held-for-sale with outstanding principal balances	$ 6,800		$ 7,400
Estimated fair value of impaired loans held-for-investment and held-for-sale	4,700		$ 5,300
Increase (decrease) in net impairment charges	5	$ 177
Net recoveries (charge offs)	2,400	291
Assets acquired through foreclosure	$ 100	$ 0