Accounting Pronouncements Recently Issued Narrative - Impact of implementation of new accounting standards (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Accounting Standards Update 2016-02 [Member]
Adjustment to opening retained earnings, net of tax, pursuant to adoption of ASU					$ 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	$ 0	$ 1,570		$ 0	0
Adjustment to opening retained earnings, net of tax, pursuant to adoption of ASU			$ (2,500)
Retained Earnings [Member] | Accounting Standards Update 2016-02 [Member]
Adjustment to opening retained earnings, net of tax, pursuant to adoption of ASU					$ 782
Retained Earnings [Member] | Accounting Standards Update 2016-13 [Member]
Adjustment to opening retained earnings, net of tax, pursuant to adoption of ASU			$ (2,457)