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Summary of Significant Accounting Policies - Additional Information (Detail)
1 Months Ended 3 Months Ended 12 Months Ended
Jul. 01, 2018
USD ($)
ShoppingCenter
shares
May 18, 2018
May 31, 2018
Dec. 31, 2018
USD ($)
Property
Dec. 31, 2017
USD ($)
Dec. 31, 2018
USD ($)
ShoppingCenter
JointVenture
Segment
Property
Dec. 31, 2017
USD ($)
Segment
Dec. 31, 2016
USD ($)
Segment
Nov. 30, 2018
USD ($)
Jun. 26, 2018
Summary Of Significant Accounting Policies [Line Items]                    
Mortgage indebtedness       $ 88,743,000 $ 641,082,000 $ 88,743,000 $ 641,082,000      
Maximum exposure to losses associated with VIEs       192,200,000 284,100,000 192,200,000 284,100,000      
Reclassification of costs from general and administrative to operating and maintenance             12,800,000 $ 15,100,000    
Capitalized costs           5,700,000 7,400,000 8,100,000    
Impairment charges related to consolidated real estate investment       900,000 280,100,000 69,324,000 340,480,000 110,906,000    
Impairment charge of assets included in spin-off RVI           14,100,000        
Interest paid           148,400,000 194,700,000 220,000,000    
Capitalized interest paid           1,100,000 1,900,000 3,100,000    
Net preferred equity interest       189,891,000 277,776,000 189,891,000 277,776,000      
Reserve of preferred equity interest       11,400,000 61,000,000 11,400,000 61,000,000      
Accounts receivable, unrecoverable amount       3,200,000 13,600,000 3,200,000 13,600,000      
Allowance for straight line rent       2,300,000 4,500,000 2,300,000 4,500,000      
Straight line rent receivable, net       $ 31,100,000 59,400,000 $ 31,100,000 59,400,000      
Reverse stock split           one-for-two        
Reverse stock split conversion ratio     0.5              
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           $ 7,700,000 11,500,000 7,000,000    
Accelerated vesting of awards due to employee separation charges           $ 1,400,000 $ 5,500,000 $ 900,000    
Corporate statutory tax rate           21.00%        
Number of reportable segments | Segment           2 2 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.        
Equity method investment, ownership percentage in unconsolidated joint venture               25.00%    
Number of shopping centers leased under ground lease agreements | ShoppingCenter           3        
Number of additional property leased under ground lease agreements | Property           3        
Dividend Trust Portfolio JV LP [Member]                    
Summary Of Significant Accounting Policies [Line Items]                    
Mortgage indebtedness                 $ 364,300,000  
Number of properties owned | Property       10   10        
Equity method investment, ownership percentage in unconsolidated joint venture       20.00%   20.00%     20.00%  
Common Shares [Member]                    
Summary Of Significant Accounting Policies [Line Items]                    
Reverse stock split           one-for-two        
Reverse stock split conversion ratio   0.5                
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]                    
Rental revenue recognition period           30 years        
Minimum [Member] | Tenant [Member]                    
Summary Of Significant Accounting Policies [Line Items]                    
Rental revenue recognition period           1 month        
Real Estate Investment [Member]                    
Summary Of Significant Accounting Policies [Line Items]                    
Impairment charges related to consolidated real estate investment           $ 69,300,000 $ 340,500,000 $ 110,900,000    
Variable Interest Entity, Not Primary Beneficiary [Member]                    
Summary Of Significant Accounting Policies [Line Items]                    
Number of unconsolidated joint ventures | JointVenture           2        
Mortgages [Member]                    
Summary Of Significant Accounting Policies [Line Items]                    
Mortgage indebtedness       $ 88,700,000 641,100,000 $ 88,700,000 641,100,000      
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   $ 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]                    
Summary Of Significant Accounting Policies [Line Items]                    
Reserve of preferred equity interest       $ 4,000,000 $ 10,800,000 $ 4,000,000 $ 10,800,000      
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