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Investment In Unconsolidated Ventures - Summarized Income Statement Information (Footnotes) (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |
Reduction in investment | $ 259 |
242, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Reduction in investment | 1,457 |
Equity Method Investments |  |
Schedule of Equity Method Investments [Line Items] |  |
Long-term debt, current maturities | 89,756 | $ 39,590
Equity Method Investments | Non-recourse Debt |  |
Schedule of Equity Method Investments [Line Items] |  |
Long-term debt, current maturities | $ 78,557 | $ 29,691

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