Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Commitments And Contingencies Disclosure [Abstract]
Reserve for unfunded lending commitments	$ 29,524	$ 29,907	$ 36,571	$ 3,974