Accounting Pronouncements Recently Issued Narrative - Impact of implementation of new accounting standards (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Standards Update 2016-02 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption		$ (2,457)
Accounting Standards Update 2016-01 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 782
Accounting Standards Update 2016-13 [Member]
Change in allowance for credit losses due to adoption of new ASU	$ 1,632
Change in allowance for unfunded commitments and letters of credit due to adoption of new ASU	$ 1,570		0
Retained Earnings [Member] | Accounting Standards Update 2016-02 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption		(2,457)
Retained Earnings [Member] | Accounting Standards Update 2016-01 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 782
Retained Earnings [Member] | Accounting Standards Update 2016-13 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption		$ (2,500)