Regulatory Capital Matters (Actual And Required Capital Amounts And Ratios Of CFBank) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Regulatory Capital Matters [Abstract]
Total Capital to risk weighted assets, Actual Amount	$ 128,487	$ 95,164
Tier 1 (Core) Capital to risk weighted assets, Actual Amount	116,872	87,857
Common equity tier 1 capital to risk-weighted assets, Actual Amount	116,872	87,857
Tier 1 (Core) Capital to adjusted total assets, Actual Amount	$ 116,872	$ 87,857
Total Capital to risk weighted assets, Actual Ratio	0.1389	0.1296
Tier 1 (Core) Capital to risk weighted assets, Actual Ratio	0.1263	0.1197
Common equity tier 1 capital to risk-weighted assets, Actual Ratio	0.1263%	0.1197%
Tier 1 (Core) Capital to adjusted total assets, Actual Ratio	0.1089	0.1058
Total Capital to risk weighted assets, Minimum Capital Required-Basel III Fully Phased-In Amount	$ 97,145	$ 77,097
Tier 1 (Core) Capital to risk weighted assets, Minimum Capital Required-Basel III Fully Phased-In Amount	78,641	62,412
Common equity tier 1 capital to risk-weighted assets, Minimum Capital Required-Basel III Fully Phased-In Amount	64,764	51,398
Tier 1 (Core) Capital to adjusted total assets, Minimum Capital Required-Basel III Fully Phased-In Amount	$ 42,936	$ 33,221
Total Capital to risk weighted assets, Minimum Capital Required-Basel III Fully Phased-In Ratio	0.1050	0.1050
Tier 1 (Core) Capital to risk weighted assets, Minimum Capital Required-Basel III Fully Phased-In Ratio	0.0850	0.0850
Common equity tier 1 capital to risk-weighted assets, Minimum Capital Required-Basel III Fully Phased-In Ratio	0.07%	0.07%
Tier 1 (Core) Capital to adjusted total assets, Minimum Capital Required-Basel III Fully Phased-In Ratio	0.0400	0.0400
Total Capital to risk weighted assets, To Be Well Capitalized Under Applicable Regulatory Capital Standards Amount	$ 92,519	$ 73,425
Tier 1 (Core) Capital to risk weighted assets, To Be Well Capitalized Under Applicable Regulatory Capital Standards Amount	74,015	58,740
Common equity tier 1 capital to risk-weighted assets, To Be Well Capitalized Under Applicable Regulatory Capital Standards Amount	60,138	47,726
Tier 1 (Core) Capital to adjusted total assets, To Be Well Capitalized Under Applicable Regulatory Capital Standards Amount	$ 53,669	$ 41,526
Total Capital to risk weighted assets, To Be Well Capitalized Under Applicable Regulatory Capital Standards Ratio	0.1000	0.1000
Tier 1 (Core) Capital to risk weighted assets, To Be Well Capitalized Under Applicable Regulatory Capital Standards Ratio	0.0800	0.0800
Common equity tier 1 capital to risk-weighted assets, To Be Well Capitalized Under Applicable Regulatory Capital Standards Ratio	0.065%	0.065%
Tier 1 (Core) Capital to adjusted total assets, To Be Well Capitalized Under Applicable Regulatory Capital Standards Ratio	0.0500	0.0500