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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 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Revenue from contracts:        
Total revenue from contracts with customers $ 12,901 $ 9,100 $ 28,964 $ 32,466
Other:        
Interest income 0 3,500 0 10,500
Other 400 500 1,200 1,700
Other, Total 400 4,000 1,200 12,200
Revenue and other income 3,800 7,600 10,700 25,900
Asset and Property Management Fees [Member]        
Revenue from contracts:        
Total revenue from contracts with customers 6,459 7,326 19,636 24,201
Unconsolidated Joint Ventures [Member]        
Revenue from contracts:        
Total revenue from contracts with customers 3,400 3,600 9,500 13,700
Unconsolidated Joint Ventures [Member] | Asset and Property Management Fees [Member]        
Revenue from contracts:        
Total revenue from contracts with customers 2,800 3,000 8,000 10,100
Unconsolidated Joint Ventures [Member] | Development Fees, Leasing Commissions and Other [Member]        
Revenue from contracts:        
Total revenue from contracts with customers $ 600 $ 600 $ 1,500 $ 3,600