Loans by Type (Schedule of the Aging of Loans by Loan Categories) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	751,309	721,587
Commercial and Industrial [Member]
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	313,404	277,091
Real Estate Commercial Mortgage [Member]
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	93,268	95,605
Real Estate Commercial Construction [Member]
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	15,293	11,858
Real Estate Faith-based Mortgage [Member]
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	312,164	316,147
Real Estate Faith-based Construction [Member]
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	17,070	20,576
Other Financing Receivable [Member]
Participating Mortgage Loans [Line Items]
Nonaccrual
Loans	110	310
Current [Member]
Participating Mortgage Loans [Line Items]
Current	751,151	721,587
Current [Member] | Commercial and Industrial [Member]
Participating Mortgage Loans [Line Items]
Current	313,404	277,091
Current [Member] | Real Estate Commercial Mortgage [Member]
Participating Mortgage Loans [Line Items]
Current	93,110	95,605
Current [Member] | Real Estate Commercial Construction [Member]
Participating Mortgage Loans [Line Items]
Current	15,293	11,858
Current [Member] | Real Estate Faith-based Mortgage [Member]
Participating Mortgage Loans [Line Items]
Current	312,164	316,147
Current [Member] | Real Estate Faith-based Construction [Member]
Participating Mortgage Loans [Line Items]
Current	17,070	20,576
Current [Member] | Other Financing Receivable [Member]
Participating Mortgage Loans [Line Items]
Current	110	310
30 to 59 Days Past Due [Member]
Participating Mortgage Loans [Line Items]
Past due
30 to 59 Days Past Due [Member] | Commercial and Industrial [Member]
Participating Mortgage Loans [Line Items]
Past due
30 to 59 Days Past Due [Member] | Real Estate Commercial Mortgage [Member]
Participating Mortgage Loans [Line Items]
Past due
30 to 59 Days Past Due [Member] | Real Estate Commercial Construction [Member]
Participating Mortgage Loans [Line Items]
Past due
30 to 59 Days Past Due [Member] | Real Estate Faith-based Mortgage [Member]
Participating Mortgage Loans [Line Items]
Past due
30 to 59 Days Past Due [Member] | Real Estate Faith-based Construction [Member]
Participating Mortgage Loans [Line Items]
Past due
30 to 59 Days Past Due [Member] | Other Financing Receivable [Member]
Participating Mortgage Loans [Line Items]
Past due
60 to 89 Days Past Due [Member]
Participating Mortgage Loans [Line Items]
Past due	158
60 to 89 Days Past Due [Member] | Commercial and Industrial [Member]
Participating Mortgage Loans [Line Items]
Past due
60 to 89 Days Past Due [Member] | Real Estate Commercial Mortgage [Member]
Participating Mortgage Loans [Line Items]
Past due	158
60 to 89 Days Past Due [Member] | Real Estate Commercial Construction [Member]
Participating Mortgage Loans [Line Items]
Past due
60 to 89 Days Past Due [Member] | Real Estate Faith-based Mortgage [Member]
Participating Mortgage Loans [Line Items]
Past due
60 to 89 Days Past Due [Member] | Real Estate Faith-based Construction [Member]
Participating Mortgage Loans [Line Items]
Past due
60 to 89 Days Past Due [Member] | Other Financing Receivable [Member]
Participating Mortgage Loans [Line Items]
Past due
90 Days and Over [Member]
Participating Mortgage Loans [Line Items]
Past due
90 Days and Over [Member] | Commercial and Industrial [Member]
Participating Mortgage Loans [Line Items]
Past due
90 Days and Over [Member] | Real Estate Commercial Mortgage [Member]
Participating Mortgage Loans [Line Items]
Past due
90 Days and Over [Member] | Real Estate Commercial Construction [Member]
Participating Mortgage Loans [Line Items]
Past due
90 Days and Over [Member] | Real Estate Faith-based Mortgage [Member]
Participating Mortgage Loans [Line Items]
Past due
90 Days and Over [Member] | Real Estate Faith-based Construction [Member]
Participating Mortgage Loans [Line Items]
Past due
90 Days and Over [Member] | Other Financing Receivable [Member]
Participating Mortgage Loans [Line Items]
Past due