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Organization, Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2018 USD ($) property segment | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Limited partnership to common stock conversion ratio | 100.00% |  |
Number of retail properties | property | 171 |  |
Number of reportable segments | segment | 3 |  |
Amount of goodwill recorded and acquisition costs capitalized | $ 0 |  |
Deferred Rent Receivables, Net | 47,200,000 | $ 37,400,000 |
Allowance for doubtful accounts receivable | 7,900,000 | 5,900,000 |
Net cash provided by (used in) investing activities | (136,619,000) | 4,063,000 | $ (613,564,000)
Net cash provided by (used in) operating activities | 96,076,000 | 114,655,000 | 109,848,000
Net cash (used in) provided by financing activities | (10,278,000) | (127,758,000) | 488,365,000
Capitalized acquisition costs | 300,000 |  |
Acquisition costs expensed | 2,100,000 | 2,100,000 | 8,200,000
Capitalized internal leasing costs | 1,400,000 | 1,300,000 |
Accounting Standards Update 2014-09 |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Cumulative effect of new accounting principle during period |  | 0 |
Accounting Standards Update 2016-15 |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Net cash provided by (used in) investing activities |  | 6,300,000 |
Net cash provided by (used in) operating activities |  | 6,300,000 |
Accounting Standards Update 2016-18 |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Net cash provided by (used in) operating activities |  | 11,500,000 | 1,900,000
Net cash (used in) provided by financing activities |  | 900,000 | $ 9,900,000
Accounting Standards Update 2016-02 |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Leases, future payment obligations | $ 203,100,000 |  |
REIT |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Percentage of distribute taxable income | 90.00% |  |
Percentage of taxable income. | 100.00% |  |
Buildings |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Property, plant and equipment, useful life | 40 years |  |
Building Improvements |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Property, plant and equipment, useful life | 15 years |  |
Furniture and fixtures | Minimum |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Property, plant and equipment, useful life | 5 years |  |
Furniture and fixtures | Maximum |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Property, plant and equipment, useful life | 20 years |  |
Core Portfolio |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Number of retail properties | property | 118 |  |
Properties owned percentage | 100.00% |  |
Acquisition costs expensed |  | $ 1,200,000 |
Opportunity Funds |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Number of retail properties | property | 53 |  |
Operating Partnership, as General Partner or Managing Member |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Equity interest held by Operating Partnership | 94.00% | 94.00% |
Remaining funds rate of distribution to operating partnership (in percent) | 20.00% |  |
Institutional Investors |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |
Remaining funds rate of distribution to all partners (in percent) | 80.00% |  |

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- Definition The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(c)(7)(ii)) -URI http://asc.fasb.org/extlink&oid=82851474&loc=d3e511914-122862 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(c)(3)(ii)(A)) -URI http://asc.fasb.org/extlink&oid=82851474&loc=d3e511914-122862 + Details
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