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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Dec. 14, 2017 USD ($) Shoppingcenter | Dec. 31, 2018 | Dec. 31, 2017 USD ($) Segment | Dec. 31, 2016 USD ($) JointVenture | Dec. 31, 2015 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Number of shopping centers the company intended to spinoff | Shoppingcenter | 50 |  |  |  |
Maximum exposure to losses associated with VIEs |  |  | $ 284,100 | $ 405,400 |
Capitalized costs |  |  | 7,400 | 8,100 | $ 9,100
Interest paid |  |  | 194,700 | 220,000 | 234,600
Capitalized interest paid |  |  | 1,900 | 3,100 | 6,700
Impairment of joint venture investments |  |  | 0 | 0 | 1,909
Net preferred equity interest |  |  | 277,776 | 393,338 |
Preferred investment interest valuation allowance |  |  | 61,000 |  |
Accounts receivable, unrecoverable amount |  |  | 13,600 | 7,100 |
Allowance for straight line rent |  |  | 4,500 | 4,100 |
Straight line rent receivable, net |  |  | 59,400 | 65,100 |
Stock-based compensation cost recognized by the company |  |  | 11,500 | 7,000 | 7,000
Accelerated vesting of awards due to employee separation charges |  |  | $ 5,500 | 900 | 500
Number of reportable segments | Segment |  |  | 2 |  |
Quantitative threshold of revenues, profit or loss and assets for identifying reportable segments |  |  | The Company’s chief operating decision maker may review operational and financial data on a property basis and does not differentiate properties on a geographical basis for purposes of allocating resources or capital. The Company evaluates individual property performance primarily based on net operating income before depreciation, amortization and certain nonrecurring items. Each consolidated shopping center is considered a separate operating segment; however, each shopping center on a stand-alone basis, represents less than 10% of revenues, profit or loss, and assets of the combined reported operating segment and meets the majority of the aggregations criteria under the applicable standard. |  |
Percentage of lease commission income upon lease execution |  |  | 50.00% |  |
Percentage of lease commission income upon tenant rent commencement |  |  | 50.00% |  |
Geographic Concentration Risk [Member] | Revenues [Member] | Shopping Center [Member] | Stand-Alone Shopping Center [Member] | Maximum [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of revenues |  |  | 10.00% |  |
Scenario Forecast [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Corporate statutory tax rate |  | 21.00% |  |  |
Real Estate Investment [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Impairment charges related to consolidated real estate investment |  |  | $ 340,500 | $ 110,900 | $ 279,000
Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Number of unconsolidated joint ventures | JointVenture |  |  |  | 2 |
Retail Value Inc. [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Gross asset value | $ 2,900,000 |  |  |  |
U.S. [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Number of shopping centers the company intended to spinoff | Shoppingcenter | 38 |  |  |  |
Puerto Rico [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Number of shopping centers the company intended to spinoff | Shoppingcenter | 12 |  |  |  |

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