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Investments in Real Estate Partnerships - Schedule of Investments in Real Estate Partnerships (Details) ratio in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) property | Dec. 31, 2015 USD ($) property | Dec. 31, 2014 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |
Current Fiscal Year End Date | --12-31 |  |
Document Fiscal Year Focus | 2016 |  |
Provision for impairment | $ 1,700 |  |
Real Estate Partnerships, Number of Properties | property | 109 | 118 |
Investments in real estate partnerships | $ 296,699 | $ 306,206 |
Revenue from Related Parties | 24,595 | 24,519 | $ 22,983
Total Assets of the Partnership | 2,608,742 | 2,675,385 |
Net Income (Loss) of the Partnership | 161,047 | 60,748 | 79,466
Income (Loss) from Equity Method Investments | $ 56,518 | $ 22,508 | $ 31,270
GRI - Regency, LLC [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 0.00% | 0.00% |
Real Estate Partnerships, Number of Properties | property | 70 | 73 |
Investments in real estate partnerships | $ 201,240 | $ 220,099 |
Total Assets of the Partnership | 1,676,134 | 1,744,017 |
Net Income (Loss) of the Partnership | 74,758 | 45,761 |
Income (Loss) from Equity Method Investments | $ 29,791 | $ 18,148 |
Columbia Regency Retail Partners, LLC [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 0.00% | 0.00% |
Real Estate Partnerships, Number of Properties | property | 7 | 9 |
Investments in real estate partnerships | $ 9,687 | $ 15,255 |
Total Assets of the Partnership | 145,192 | 175,044 |
Net Income (Loss) of the Partnership | 21,024 | (1,396) |
Income (Loss) from Equity Method Investments | $ 4,180 | $ (278) |
Columbia Regency Partners II, LLC [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 0.00% | 0.00% |
Real Estate Partnerships, Number of Properties | property | 12 | 14 |
Investments in real estate partnerships | $ 14,750 | $ 8,496 |
Total Assets of the Partnership | 338,307 | 290,064 |
Net Income (Loss) of the Partnership | 16,765 | 3,794 |
Income (Loss) from Equity Method Investments | $ 3,240 | $ 755 |
Cameron Village, LLC [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 0.00% | 0.00% |
Real Estate Partnerships, Number of Properties | property | 1 | 1 |
Investments in real estate partnerships | $ 11,877 | $ 11,857 |
Total Assets of the Partnership | 99,967 | 100,124 |
Net Income (Loss) of the Partnership | 2,326 | 2,195 |
Income (Loss) from Equity Method Investments | $ 695 | $ 643 |
RegCal, LLC [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 0.00% | 0.00% |
Real Estate Partnerships, Number of Properties | property | 7 | 7 |
Investments in real estate partnerships | $ 21,516 | $ 17,967 |
Total Assets of the Partnership | 141,827 | 145,213 |
Net Income (Loss) of the Partnership | 4,358 | 2,316 |
Income (Loss) from Equity Method Investments | $ 1,080 | $ 576 |
US Regency Retail 1, LLC [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 0.00% | 0.00% |
Real Estate Partnerships, Number of Properties | property | 8 | 8 |
Investments in real estate partnerships | $ 13,176 | $ 161 |
Total Assets of the Partnership | 109,665 | 112,225 |
Net Income (Loss) of the Partnership | 5,901 | 4,011 |
Income (Loss) from Equity Method Investments | $ 1,180 | $ 807 |
Other Investments in Real Estate Partnerships [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Percentage | 0.00% | 0.00% |
Real Estate Partnerships, Number of Properties | 0 | 0 |
Investments in real estate partnerships | $ 24,453 | $ 32,371 |
Total Assets of the Partnership | 97,650 | 108,698 |
Net Income (Loss) of the Partnership | 35,915 | 4,067 |
Income (Loss) from Equity Method Investments | $ 16,352 | $ 1,857 |

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