Mortgage Loans On Real Estate (Schedule Of Mortgage Loans On Real Estate) (Details) $ in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2017
USD ($)
| |
| Mortgage Loans on Real Estate [Line Items] | |
| Face Amount of Mortgages or Maximum Available Credit | $ 44,695 |
| Carrying Amount of Mortgages | $ 45,734 |
| Borrower A [Member] | Land [Member] | |
| Mortgage Loans on Real Estate [Line Items] | |
| Interest Accrual Rate | 5.85% |
| Interest Payment Rate | 5.85% |
| Final Maturity Date | Jul. 21, 2019 |
| Periodic Payment Terms | P&I |
| Face Amount of Mortgages or Maximum Available Credit | $ 44,695 |
| Carrying Amount of Mortgages | $ 45,734 |