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Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component (Parenthetical) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Change in cash flow hedges reclassed to earnings | $ (117) | $ (335) | $ (351) | $ (712)
Interest Expense [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Change in cash flow hedges reclassed to earnings |  |  | $ 400 |

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