Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax [Line Items]
Tax computed at statutory rate	21.00%	21.00%	35.00%
Investments in affordable housing limited partnerships	$ 37,300,000	$ 0
Tax year audited	2016
Federal And State [Member] | From 2011 Through 2017 Tax Years [Member]
Income Tax [Line Items]
Tax credit carryforwards	$ 2,000,000.0
Tax credit carryforwards, originated tax years	2015 through 2019
Federal And State [Member] | From 2011 Through 2017 Tax Years [Member] | Minimum [Member]
Income Tax [Line Items]
Tax credit carryforwards, expiration date	Dec. 31, 2022
State [Member] | 2004 Through 2017 Tax Years [Member]
Income Tax [Line Items]
Net operating loss carryforwards	$ 22,900,000
Operating loss carryforwards, originated tax years	2004 through 2019
Net operating loss carryforwards, expiration date	Dec. 31, 2024