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Loans by Type (Schedule of the Aging of Loans by Loan Categories) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	888,575	891,676
Commercial and Industrial [Member]
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	302,747	298,984
Real Estate Commercial Mortgage [Member]
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	96,630	100,419
Real Estate Commercial Construction [Member]
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	23,766	25,090
Real Estate Faith-based Mortgage [Member]
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	331,153	333,661
Real Estate Faith-based Construction [Member]
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	20,800	23,818
Paycheck protection program ("PPP") [Member]
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	113,474	109,704
Other Financing Receivable [Member]
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	5
Current [Member]
Participating Mortgage Loans [Line Items]
Gross	888,575	891,676
Current [Member] | Commercial and Industrial [Member]
Participating Mortgage Loans [Line Items]
Gross	302,747	298,984
Current [Member] | Real Estate Commercial Mortgage [Member]
Participating Mortgage Loans [Line Items]
Gross	96,630	100,419
Current [Member] | Real Estate Commercial Construction [Member]
Participating Mortgage Loans [Line Items]
Gross	23,766	25,090
Current [Member] | Real Estate Faith-based Mortgage [Member]
Participating Mortgage Loans [Line Items]
Gross	331,153	333,661
Current [Member] | Real Estate Faith-based Construction [Member]
Participating Mortgage Loans [Line Items]
Gross	20,800	23,818
Current [Member] | Other Financing Receivable [Member]
Participating Mortgage Loans [Line Items]
Gross	5
30 to 59 Days Past Due [Member]
Participating Mortgage Loans [Line Items]
Gross
30 to 59 Days Past Due [Member] | Commercial and Industrial [Member]
Participating Mortgage Loans [Line Items]
Gross
30 to 59 Days Past Due [Member] | Real Estate Commercial Mortgage [Member]
Participating Mortgage Loans [Line Items]
Gross
30 to 59 Days Past Due [Member] | Real Estate Commercial Construction [Member]
Participating Mortgage Loans [Line Items]
Gross
30 to 59 Days Past Due [Member] | Real Estate Faith-based Mortgage [Member]
Participating Mortgage Loans [Line Items]
Gross
30 to 59 Days Past Due [Member] | Real Estate Faith-based Construction [Member]
Participating Mortgage Loans [Line Items]
Gross
30 to 59 Days Past Due [Member] | Paycheck protection program ("PPP") [Member]
Participating Mortgage Loans [Line Items]
Gross
30 to 59 Days Past Due [Member] | Other Financing Receivable [Member]
Participating Mortgage Loans [Line Items]
Gross
60 to 89 Days Past Due [Member]
Participating Mortgage Loans [Line Items]
Gross
60 to 89 Days Past Due [Member] | Commercial and Industrial [Member]
Participating Mortgage Loans [Line Items]
Gross
60 to 89 Days Past Due [Member] | Real Estate Commercial Mortgage [Member]
Participating Mortgage Loans [Line Items]
Gross
60 to 89 Days Past Due [Member] | Real Estate Commercial Construction [Member]
Participating Mortgage Loans [Line Items]
Gross
60 to 89 Days Past Due [Member] | Real Estate Faith-based Mortgage [Member]
Participating Mortgage Loans [Line Items]
Gross
60 to 89 Days Past Due [Member] | Real Estate Faith-based Construction [Member]
Participating Mortgage Loans [Line Items]
Gross
60 to 89 Days Past Due [Member] | Paycheck protection program ("PPP") [Member]
Participating Mortgage Loans [Line Items]
Gross
60 to 89 Days Past Due [Member] | Other Financing Receivable [Member]
Participating Mortgage Loans [Line Items]
Gross
90 Days and Over [Member]
Participating Mortgage Loans [Line Items]
Gross
90 Days and Over [Member] | Commercial and Industrial [Member]
Participating Mortgage Loans [Line Items]
Gross
90 Days and Over [Member] | Real Estate Commercial Mortgage [Member]
Participating Mortgage Loans [Line Items]
Gross
90 Days and Over [Member] | Real Estate Commercial Construction [Member]
Participating Mortgage Loans [Line Items]
Gross
90 Days and Over [Member] | Real Estate Faith-based Mortgage [Member]
Participating Mortgage Loans [Line Items]
Gross
90 Days and Over [Member] | Real Estate Faith-based Construction [Member]
Participating Mortgage Loans [Line Items]
Gross
90 Days and Over [Member] | Paycheck protection program ("PPP") [Member]
Participating Mortgage Loans [Line Items]
Gross
90 Days and Over [Member] | Other Financing Receivable [Member]
Participating Mortgage Loans [Line Items]
Gross
Current [Member] | Paycheck protection program ("PPP") [Member]
Participating Mortgage Loans [Line Items]
Gross	$ 113,474	$ 109,704

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