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Variable Interest Entities, Contingent Liabilities and Consolidated Joint Ventures - MCB Real Estate, LLC (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) item | Jun. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Consolidated VIEs Carrying Amount of Assets and Liabilities |  |  |  |  |
Mortgages payable | $ 395,284,000 |  | $ 395,284,000 |  | $ 394,898,000
Net book value of property | 8,516,000 |  | 8,516,000 |  |
Real estate expenses | 2,371,000 | $ 2,159,000 | $ 5,075,000 | $ 4,334,000 |
Consolidated JV |  |  |  |  |
Consolidated VIEs Carrying Amount of Assets and Liabilities |  |  |  |  |
Number of joint ventures with controlling interest | item |  |  | 6 |  |
Other Consolidated JV |  |  |  |  |
Consolidated VIEs Carrying Amount of Assets and Liabilities |  |  |  |  |
Number of joint ventures with controlling interest | item |  |  | 2 |  |
Investment in consolidated joint ventures | 7,211,000 |  | $ 7,211,000 |  |
MCB Real Estate LLC And Its Affiliates | Consolidated JV |  |  |  |  |
Consolidated VIEs Carrying Amount of Assets and Liabilities |  |  |  |  |
Number of joint ventures with controlling interest | item |  |  | 4 |  |
Investment in consolidated joint ventures | 9,726,000 |  | $ 9,726,000 |  |
MCB Real Estate LLC And Its Affiliates | Consolidated JV | Pathmark supermarket in Philadelphia, Pennsylvania |  |  |  |  |
Consolidated VIEs Carrying Amount of Assets and Liabilities |  |  |  |  |
Investment in consolidated joint ventures | 2,815,000 |  | 2,815,000 |  |
Mortgages payable | 4,337,000 |  | 4,337,000 |  |
Net book value of property | 7,083,000 |  | 7,083,000 |  |
Real estate expenses | 48,000 | 58,000 | 118,000 | 172,000 |
Mortgage interest | $ 43,000 | $ 44,000 | 85,000 | $ 87,000 |
Impairment charge |  |  | $ 0 |  |

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- Definition Amount of expense incurred and directly related to generating revenue from leased and rented property or equipment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(c)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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