Unconsolidated Investments - Schedule of Projects Accounted under Equity Method of Accounting (Detail) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]    
Unconsolidated investments $ 87,168 $ 116,473
South Kent [Member]    
Schedule of Equity Method Investments [Line Items]    
Unconsolidated investments [1] $ 0 $ 6,185
Percentage of ownership [1] 50.00% 50.00%
Grand [Member]    
Schedule of Equity Method Investments [Line Items]    
Unconsolidated investments [1] $ 0 $ 5,735
Percentage of ownership [1] 45.00% 45.00%
K2 [Member]    
Schedule of Equity Method Investments [Line Items]    
Unconsolidated investments $ 87,168 $ 104,553
Percentage of ownership 33.30% 33.30%
[1] As of September 30, 2016, the equity method investment balances in South Kent and Grand were $0. In accordance with ASC 323, Investments - Equity Method and Joint Ventures, the Company has suspended recognition of South Kent's and Grand's equity method earnings or losses and accumulated other comprehensive income (loss), if applicable, until such time as South Kent's and Grand's subsequent cumulative equity method earnings and other comprehensive income exceed cumulative distributions received, cumulative equity method losses and, where applicable, cumulative other comprehensive income (loss) during the suspension period. During the periods when South Kent's and Grand's equity method earnings or losses are suspended, the Company will record cash distributions received as gains in earnings (losses) in unconsolidated investments, net on the Company's consolidated statements of operations.