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Investment in Unconsolidated Ventures - Summarized Income Statement Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Equity Method Investments and Joint Ventures [Abstract]        
Revenues $ 2,845 $ 23,114 $ 6,226 $ 45,750
Earnings (loss) 2,661 6,327 6,941 18,548
Equity in earnings of unconsolidated ventures $ 1,000 $ 2,747 $ 2,529 $ 9,109