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New Financial Accounting Pronouncements - Additional Information (Detail) - ASU 2016-09 [Member] $ in Millions | 3 Months Ended
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Mar. 31, 2017 USD ($)
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |
Discrete tax benefit | $ 0.4
Retained Earnings [Member] |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |
Cumulative effect adjustment to reduce retained earnings | $ 0.1

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- Details
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- Details
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