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Stock-Based Compensation - Summary of Activity for SARs (Detail) - Stock Appreciation Rights (SARs) [Member] | 12 Months Ended
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Dec. 31, 2016 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Assumed SARs from Newport acquisition, Non-vested SARs | shares | 899,851
Granted, Non-vested SARs | shares | 0
Exercised, Non-vested SARs | shares | (280,106)
Forfeited or expired, Non-vested SARs | shares | (20,411)
Non-vested RSUs/SARs - end of period | shares | 599,334
Assumed SARs from Newport acquisition, Weighted Average Base Value | $ / shares | $ 27.71
Granted, Weighted Average Base Value | $ / shares | 0
Exercised, Weighted Average Base Value | $ / shares | 26.70
Forfeited or expired, Weighted Average Base Value | $ / shares | 30.29
SARs Outstanding - end of period, Weighted Average Base Value | $ / shares | $ 28.10

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- Definition Share based compensation arrangement by share based payment award equity instruments other than options exercised in period weighted average base value. + References No definition available. + Details
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- Definition Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Base Value + References No definition available. + Details
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- Definition Share-based compensation arrangement by share-based payment award equity instruments other than options assumed from acquisition. + References No definition available. + Details
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- Definition Sharebased compensation arrangement by sharebased payment award equity instruments other than options assumed from acquisition weighted average base value. + References No definition available. + Details
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- Definition Share-based compensation arrangement by share-based payment award, equity instruments other than options, forfeitures, weighted average base value. + References No definition available. + Details
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- Definition Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average base value. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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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