Loans Receivable and Allowance for Loan Losses (Schedule of Age Analysis of Past Due Loans by Class) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans: Balance	$ 131,049	$ 147,335
Wholly-Owned First [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans: Balance	124,157	137,289
Wholly-Owned Junior [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans: Balance	3,589	4,254
Participation First [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans: Balance	3,303	5,792
Church Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,907	12,835
Current	125,142	134,500
Loans: Balance	131,049	147,335
Church Loans [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		5,739
Church Loans [Member] | Greater Than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,907	7,096
Church Loans [Member] | Wholly-Owned First [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,907	9,063
Current	118,250	128,226
Loans: Balance	124,157	137,289
Church Loans [Member] | Wholly-Owned First [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,259
Church Loans [Member] | Wholly-Owned First [Member] | Greater Than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,907	5,804
Church Loans [Member] | Wholly-Owned Junior [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		187
Current	3,589	4,067
Loans: Balance	3,589	4,254
Church Loans [Member] | Wholly-Owned Junior [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		187
Church Loans [Member] | Participation First [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3,585
Current	3,303	2,207
Loans: Balance	$ 3,303	5,792
Church Loans [Member] | Participation First [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		2,293
Church Loans [Member] | Participation First [Member] | Greater Than 90 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		$ 1,292