Allowance for Credit Losses and Credit Quality - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Receivables [Abstract]
Commitments to lend additional funds	$ 2,900		$ 2,900		$ 638
Other real estate owned and repossessed and returned assets, write down	$ 348	$ 1,300	$ 1,200	$ 3,100