Regulatory Capital Matters (Actual And Required Capital Amounts And Ratios Of CFBank) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Regulatory Capital Matters [Abstract]
Total Capital to risk weighted assets, Actual Amount	$ 145,379	$ 136,683
Tier 1 (Core) Capital to risk weighted assets, Actual Amount	131,544	124,678
Common equity tier 1 capital to risk-weighted assets, Actual Amount	131,544	124,678
Tier 1 (Core) Capital to adjusted total assets (Leverage ratio), Actual Amount	$ 131,544	$ 124,678
Total Capital to risk weighted assets, Actual Ratio	0.1318	0.1431
Tier 1 (Core) Capital to risk weighted assets, Actual Ratio	0.1192	0.1305
Common equity tier 1 capital to risk-weighted assets, Actual Ratio	0.1192%	0.1305%
Tier 1 (Core) Capital to adjusted total assets, Actual Ratio	0.0937	0.0974
Total Capital to risk weighted assets, Minimum Capital Required-Basel III Fully Phased-In Amount	$ 115,851	$ 100,298
Tier 1 (Core) Capital to risk weighted assets, Minimum Capital Required-Basel III Fully Phased-In Amount	93,784	81,194
Common equity tier 1 capital to risk-weighted assets, Minimum Capital Required-Basel III Fully Phased-In Amount	77,234	66,866
Tier 1 (Core) Capital to adjusted total assets, Minimum Capital Required-Basel III Fully Phased-In Amount	$ 56,150	$ 51,187
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	$ 110,334	$ 95,522
Tier 1 (Core) Capital to risk weighted assets, To Be Well Capitalized Under Applicable Regulatory Capital Standards Amount	88,267	76,418
Common equity tier 1 capital to risk-weighted assets, To Be Well Capitalized Under Applicable Regulatory Capital Standards Amount	71,717	62,089
Tier 1 (Core) Capital to adjusted total assets, To Be Well Capitalized Under Applicable Regulatory Capital Standards Amount	$ 70,188	$ 63,984
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