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Summary of Significant Accounting Policies - Additional Information (Detail) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 01, 2019 USD ($) ShoppingCenter Office | Jul. 01, 2018 USD ($) ShoppingCenter shares | Dec. 31, 2019 USD ($) Affiliate Segment | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jun. 26, 2018
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Mortgage indebtedness |  |  | $ 94,874,000 | $ 88,743,000 |  |
Maximum exposure to losses associated with VIEs |  |  | 114,000,000.0 | 192,200,000 |  |
Capitalized costs |  |  | 3,800,000 | 5,700,000 | $ 7,400,000 |
Impairment charges related to consolidated real estate investment |  |  | 3,370,000 | 69,324,000 | 340,480,000 |
Impairment charge of assets included in spin-off RVI |  |  |  | 14,100,000 |  |
Interest paid |  |  | 79,500,000 | 148,400,000 | 194,700,000 |
Capitalized interest paid |  |  | 1,300,000 | 1,100,000 | 1,900,000 |
Net preferred equity interest |  |  | 112,589,000 | 189,891,000 |  |
Reserve of preferred equity interest |  |  | 15,544,000 | 11,422,000 | 61,000,000 |
Accounts receivable, not probable of being collected amount |  |  | 1,000,000.0 | 3,200,000 |  |
Allowance for straight line rent |  |  | 2,800,000 | 2,300,000 |  |
Straight line rent receivable, net |  |  | $ 31,200,000 | 31,100,000 |  |
Contract asset, explanation of change |  |  | The portion of payments retained by the customer until the second contingent event is not considered a significant financing component because the right to payment is expected to become unconditional within one year or less. Contract assets are transferred to receivables when the right to payment becomes unconditional |  |  |
Stock-based compensation cost recognized by the company |  |  | $ 9,200,000 | 7,700,000 | 11,500,000 |
Accelerated vesting of awards due to employee separation charges |  |  |  | 1,400,000 | 5,500,000 |
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. |  |  |
Number of shopping centers leased under ground lease agreements | ShoppingCenter | 3 |  |  |  |  |
Number of additional lease agreements where company is lessee | Office | 3 |  |  |  |  |
ROU assets | $ 22,000,000.0 |  | $ 21,792,000 | 0 |  |
Lease liabilities | 40,300,000 |  | $ 40,725,000 |  |  |
Reversal of real estate taxes paid by tenants | $ 1,700,000 |  |  |  |  |
Maximum [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Operating lease term |  |  | 30 years |  |  |
Maximum [Member] | Geographic Concentration Risk [Member] | Revenues [Member] | Shopping Center [Member] | Stand-Alone Shopping Center [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Percentage of revenues |  |  | 10.00% |  |  |
Maximum [Member] | Tenant [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Operating lease term |  |  | 30 years |  |  |
Minimum [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Operating lease term |  |  | 1 month |  |  |
Minimum [Member] | Tenant [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Operating lease term |  |  | 1 month |  |  |
Real Estate Investment [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Impairment charges related to consolidated real estate investment |  |  | $ 3,400,000 | $ 69,300,000 | 340,500,000 |
Adoption of Topic 606 [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Revenue recognized percentage upon lease execution |  |  |  | 50.00% |  |
Revenue recognized percentage upon tenant rent commencement |  |  |  | 50.00% |  |
Adjustment for Contractual Lease Payments [Member] | ASU 2016-02 [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Reclassification adjustments |  |  |  | $ 13,400,000 | $ 23,900,000 |
Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Number of unconsolidated joint ventures | Affiliate |  |  | 2 |  |  |
Mortgages [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Mortgage indebtedness |  |  | $ 94,900,000 | $ 88,700,000 |  |
Retail Value Inc. [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Disposition fees equal to percentage of gross sale price |  |  | 1.00% |  |  |
Retail Value Inc. [Member] | Series A Preferred Stock [Member] | Aggregate Gross Proceeds of RVI's Asset Sales Subsequent to July 1, 2018 Exceeds $2.0 Billion [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Preferred stock, value |  | $ 190,000,000 |  |  |  |
Maximum increase in preferred stock amount |  | $ 10,000,000 |  |  |  |
Spin-off [Member] | Maximum [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Dividend payments to be received will be recorded as reduction of preferred shares carrying value |  |  | $ 190,000,000 |  |  |
Spin-off [Member] | Retail Value Inc. [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Number of shopping centers in connection with spinoff | ShoppingCenter |  | 48 |  |  |  |
Gross asset value |  | $ 2,700,000,000 |  |  |  |
Percentage of distribution of outstanding common shares rights to holders |  |  |  |  |  | 100.00%
Spin off distribution description |  | On the spin-off date, holders of SITE Centers’ common shares received one common share of RVI for every ten shares of SITE Centers’ common stock held on the record date. |  |  |  |
Spin-off [Member] | Retail Value Inc. [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Number of shares retained | shares |  | 1,000 |  |  |  |
Spin-off [Member] | Retail Value Inc. [Member] | Series A Preferred Stock [Member] | Aggregate Gross Proceeds of RVI's Asset Sales Subsequent to July 1, 2018 Exceeds $2.0 Billion [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Preferred stock, value |  | $ 190,000,000 |  |  |  |
Maximum increase in preferred stock amount |  | 10,000,000 |  |  |  |
Spin-off [Member] | Retail Value Inc. [Member] | Mortgages [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Mortgage indebtedness |  | $ 1,270,000,000 |  |  |  |
U.S. [Member] | Spin-off [Member] | Retail Value Inc. [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Number of shopping centers in connection with spinoff | ShoppingCenter |  | 36 |  |  |  |
Puerto Rico [Member] | Spin-off [Member] | Retail Value Inc. [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Number of shopping centers in connection with spinoff | ShoppingCenter |  | 12 |  |  |  |

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