Fair Value Measurements - Net Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net losses recognized	$ (74)	$ (697)
SBA property
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net losses recognized	17	(27)
Commercial lines of credit
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net losses recognized	(136)	(506)
SBA commercial term
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net losses recognized	(30)	(164)
Other real estate owned
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net losses recognized	$ 75	$ 0