Unused Available Lines of Credit (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Amount outstanding under lines of credit	$ 18,000,000
Unsecured Debt [Member]
Line of Credit Facility [Line Items]
Line of credit amount	83,000,000
Unsecured Debt [Member] | US Bank [Member]
Line of Credit Facility [Line Items]
Line of credit amount	20,000,000
Unsecured Debt [Member] | UMB Bank [Member]
Line of Credit Facility [Line Items]
Line of credit amount	20,000,000
Unsecured Debt [Member] | Wells Fargo Bank [Member]
Line of Credit Facility [Line Items]
Line of credit amount	15,000,000
Unsecured Debt [Member] | PNC Bank [Member]
Line of Credit Facility [Line Items]
Line of credit amount	12,000,000
Unsecured Debt [Member] | Frost National Bank [Member]
Line of Credit Facility [Line Items]
Line of credit amount	10,000,000
Unsecured Debt [Member] | JPM Chase Bank [Member]
Line of Credit Facility [Line Items]
Line of credit amount	6,000,000
Secured Debt [Member] | UMB Bank [Member]
Line of Credit Facility [Line Items]
Line of credit amount	50,000,000
Secured Debt [Member] | Federal Home Loan Bank [Member]
Line of Credit Facility [Line Items]
Line of credit amount	192,045,000
Secured Debt [Member] | First Tennessee Bank [Member]
Line of Credit Facility [Line Items]
Line of credit amount	$ 50,000,000