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Mortgages Payable (Details) - USD ($) | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Debt Instrument [Line Items] |  |
Accumulated amortization | $ 12,667,000 | $ 11,268,000
Debt costs, net of accumulated amortization | (5,380,000) | (2,715,000)
Long-term Debt, Fiscal Year Maturity [Abstract] |  |
Mortgages payable, including unamortized premium and net of unamortized debt costs | 13,300,000 | 13,878,000
Mortgages |  |
Debt Instrument [Line Items] |  |
Debt costs | (147,000) | (147,000)
Accumulated amortization | 55,000 | 38,000
Debt costs, net of accumulated amortization | (92,000) | (109,000)
Mortgages payable, including unamortized premium and net of unamortized debt costs | 13,300,000 | 13,878,000
Long-term Debt, Fiscal Year Maturity [Abstract] |  |
2018 | 623,000 |
2019 | 652,000 |
2020 | 682,000 |
2021 | 716,000 |
2022 | 750,000 |
Thereafter | 9,969,000 |
Mortgages payable, including unamortized premium and net of unamortized debt costs | 13,392,000 |
Mortgages | November 2014 |  |
Debt Instrument [Line Items] |  |
Initial Balance | $ 15,151,000 |
Interest Rate | 5.23% |
Carrying Value of Encumbered Asset(s) | $ 20,917,000 |
Outstanding Principal Balance | $ 13,392,000 | $ 13,987,000

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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