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Legal Matters - Additional Information (Detail) $ in Millions | Aug. 05, 2015 USD ($) Plaintiff Employee
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Robles Lawsuits [Member] |
Loss Contingencies [Line Items] |
Number of plaintiffs against HGT | Plaintiff | 63
Number of employees filed lawsuit | Employee | 5
Robles And Adame Lawsuits | Accrued Other [Member] |
Loss Contingencies [Line Items] |
Claims settlement recorded in consolidated balance sheet | $ 4.8
Robles And Adame Lawsuits | General and Administrative Expense |
Loss Contingencies [Line Items] |
Claims settlement recorded in consolidated statement of income and comprehensive income | $ 4.8

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