Loans - Troubled Debt Restructurings (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) loan security	Mar. 31, 2019 USD ($) security	Dec. 31, 2019 USD ($)
Loans and Leases Receivable Disclosure [Abstract]
Loans classified as TDRs	$ 5,300,000		$ 7,900,000
Number of loans modified as TDRs | security	2	0
Total modifications	$ 218,000
Number of TDR loans paid off | security	1	1
TDR loans paid off	$ 2,800,000	$ 105,000
Number of loans with post-modification changes for unpaid principal balance in loans modified as TDRs | security	0	0
Number of loans for which there was payment default within first 12 months of modification | security	0	3
Payment default within first 12 months of modification, recorded investment		$ 416,000
Commitments to extend additional credit to borrowers whose loan terms have been modified in TDRs	$ 0		$ 0
Number of loans modified due to CARES Act | loan	17
Amount modified due to CARES Act	$ 6,700,000