Mortgage And Other Notes Receivable Mortgage and Other Notes Receivable (Schedule of Bickford Construction Loans) (Details) - USD ($) |
12 Months Ended | |
---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
Loans and Leases Receivable, Commitments, Fixed Rates | $ 103,000,000 | |
Loans and Leases Receivable, Net Amount | $ 141,486,000 | $ 133,493,000 |
July 2016 [Member] | Bickford Note Investment [Member] | ||
Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
Note Receivable Interest Rate | 9.00% | |
Loan Term | 5 years | |
Loans and Leases Receivable, Commitments, Fixed Rates | $ 14,000,000 | |
Loans and Leases Receivable, Net Amount | $ 11,096,000 | |
January 2017 [Member] | Bickford Note Investment [Member] | ||
Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
Note Receivable Interest Rate | 9.00% | |
Loan Term | 5 years | |
Loans and Leases Receivable, Commitments, Fixed Rates | $ 14,000,000 | |
Loans and Leases Receivable, Net Amount | $ 4,462,000 |