Junior Subordinated Debentures (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Common stock issued by Trusts	$ 14,000	$ 14,000
Unrealized gains (losses) arising during the period	$ 18,842	$ 25,855	$ (23,268)