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Shareholders' Equity (Summary of Activity Related to Restricted Stock Units) (Detail) | 9 Months Ended
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Sep. 30, 2018 shares
Restricted Stock Units (RSUs) [Member] |
Unvested shares |
Outstanding, shares at December 31, 2017 | 1,042,014
Granted | 496,217
Forfeited | (53,063)
Vested and issued | (480,577)
Vested and deferred | (3,653)
Outstanding at September 30, 2018 | 264,374
Outstanding, shares at September 30, 2018 | 1,000,938
Performance Shares [Member] |
Unvested shares |
Outstanding, shares at December 31, 2017 | 514,461
Granted | 178,377
Forfeited | (2,071)
Vested and issued | (154,181)
Outstanding, shares at September 30, 2018 | 536,586
Progressive Waste Solutions Ltd. [Member] | Restricted Stock Units (RSUs) [Member] |
Unvested shares |
Outstanding at December 31, 2017 | 158,510
Forfeited | (2,435)
Cash settled | (27,059)
Outstanding at September 30, 2018 | 129,016
Progressive Waste Solutions Ltd. [Member] | Performance Shares [Member] |
Unvested shares |
Outstanding at December 31, 2017 | 55,602
Forfeited | (1,909)
Cash settled | (27,033)
Outstanding at September 30, 2018 | 26,660

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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=96867065&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=96867065&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=96867065&loc=d3e5070-113901 + Details
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- Definition The number of equity-based instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were vested and deferred during the reporting period. + References No definition available. + Details
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