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Summary of Significant Accounting Policies and Recently Issued Accounting Standards - Schedule of Impact on Consolidated Statement of Cash Flows (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Impact on Net Cash provided by Operating Activities | $ 6.8 | $ 13.1
Imapct on Net Cash used in Financing Activities | (6.8) | (13.1)
Accounting Standards Update 2016-09 [Member] |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Impact on Net Cash provided by Operating Activities | 6.8 | 13.1
Imapct on Net Cash used in Financing Activities | $ (6.8) | $ (13.1)

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- Definition New accounting pronouncement early adoption on retrospective basis resulted in increase (decrease) in financing activities. + References No definition available. + Details
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- Definition New accounting pronouncement early adoption on retrospective basis resulted in increase (decrease) in operating cash flow. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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