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Financial Instruments - Summary of Outstanding Interest Rate Swaps (Detail) - Interest Rate Swap [Member] - USD ($) | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Other Non-current Liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | $ 60,000,000 |
Fair Value | $ (972,000) |
Other Non-current Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount |  | $ 50,000,000
Fair Value |  | $ 240,000

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