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Reporting Segments and Related Information - Revenue Components of Real Estate Segments (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Revenue from External Customer [Line Items] |  |
Equity in earnings of unconsolidated joint ventures, net | $ 876 | $ 167
Total expenses | 11,694 | 11,924
Operating results from commercial and unconsolidated joint ventures | 219 | 1,981
Real estate - commercial/industrial |  |
Revenue from External Customer [Line Items] |  |
Commercial revenues | 2,826 | 2,154
Equity in earnings of unconsolidated joint ventures, net | 876 | 167
Commercial revenues and equity in earnings of unconsolidated joint ventures | 3,702 | 2,321
Total expenses | 1,792 | 1,319
Operating results from commercial and unconsolidated joint ventures | $ 1,910 | $ 1,002

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