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Investments in and Advances to Joint Ventures - Revenues Earned By the Company from Unconsolidated Joint Ventures and Interest Income (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Revenue from contracts:        
Total revenue from contracts with customers $ 8,358 $ 8,620 $ 16,063 $ 23,367
Other:        
Interest income 0 3,500 0 6,900
Other 400 400 800 1,200
Other, Total 400 3,900 800 8,100
Revenue and other income 3,500 7,000 6,900 18,300
Asset and Property Management Fees [Member]        
Revenue from contracts:        
Total revenue from contracts with customers 6,602 7,551 13,177 16,876
Unconsolidated Joint Ventures [Member]        
Revenue from contracts:        
Total revenue from contracts with customers 3,100 3,100 6,100 10,200
Unconsolidated Joint Ventures [Member] | Asset and Property Management Fees [Member]        
Revenue from contracts:        
Total revenue from contracts with customers 2,600 2,700 5,200 7,200
Unconsolidated Joint Ventures [Member] | Development Fees, Leasing Commissions and Other [Member]        
Revenue from contracts:        
Total revenue from contracts with customers $ 500 $ 400 $ 900 $ 3,000