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Actual regulatory capital position and minimum capital requirements
$ in Thousands
Sep. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Total Capital (to risk-weighted assets)    
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]    
Banking Regulation, Total Capital, Actual $ 124,616 $ 114,421
Banking Regulation, Total Risk-Based Capital Ratio, Actual 0.1360 0.1284
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum $ 73,307 $ 71,278
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum 0.080 0.080
[custom:TotalCapitalMinimumCapitalRequiredForCapitalAdequacyPlusRequiredCapitalConservationBufferAmount-0] $ 96,216 $ 93,553
[custom:TotalCapitalMinimumCapitalRequiredForCapitalAdequacyPlusRequiredCapitalConservationBufferRatio-0] 0.105 0.105
Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum $ 91,634 $ 89,098
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum 0.100 0.100
Tier 1 Capital (to risk-weighted assets)    
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]    
Banking Regulation, Total Capital, Actual $ 113,142 $ 105,430
Banking Regulation, Total Risk-Based Capital Ratio, Actual 12.35 11.83
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum $ 54,980 $ 53,459
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum 6.0 6.0
[custom:TotalCapitalMinimumCapitalRequiredForCapitalAdequacyPlusRequiredCapitalConservationBufferAmount-0] $ 77,889 $ 75,733
[custom:TotalCapitalMinimumCapitalRequiredForCapitalAdequacyPlusRequiredCapitalConservationBufferRatio-0] 8.5 8.5
Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum $ 73,307 $ 71,278
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum 8.0 8.0
Common Equity Tier 1 Capital (to risk-weighted assets)    
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]    
Banking Regulation, Total Capital, Actual $ 113,142 $ 105,430
Banking Regulation, Total Risk-Based Capital Ratio, Actual 12.35 11.83
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum $ 41,235 $ 40,094
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum 4.5 4.5
[custom:TotalCapitalMinimumCapitalRequiredForCapitalAdequacyPlusRequiredCapitalConservationBufferAmount-0] $ 64,144 $ 62,368
[custom:TotalCapitalMinimumCapitalRequiredForCapitalAdequacyPlusRequiredCapitalConservationBufferRatio-0] 7.0 7.0
Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum $ 59,562 $ 57,914
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum 6.5 6.5
Tier 1 Capital (to average assets)    
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]    
Banking Regulation, Total Capital, Actual $ 113,142 $ 105,430
Banking Regulation, Total Risk-Based Capital Ratio, Actual 8.93 9.60
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum $ 50,704 $ 43,944
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum 4.0 4.0
[custom:TotalCapitalMinimumCapitalRequiredForCapitalAdequacyPlusRequiredCapitalConservationBufferAmount-0] $ 50,704 $ 43,944
[custom:TotalCapitalMinimumCapitalRequiredForCapitalAdequacyPlusRequiredCapitalConservationBufferRatio-0] 4.0 4.0
Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum $ 63,380 $ 54,930
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum 5.0 5.0