Credit Quality and Nonperforming Assets - Purchased Credit Impaired Loans - Tabular Disclosure (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance, Total	$ 17,099	$ 15,815
Impaired Financing Receivable, Carrying Value, Total	15,539	$ 14,152
Purchased Credit Impaired Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance, Total	86
Impaired Financing Receivable, Carrying Value, Total	86
Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance, Total	86
Impaired Financing Receivable, Carrying Value, Total	$ 86