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Shareholders' Equity (Summary of Activity Related to Restricted Stock Units) (Detail) | 9 Months Ended
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Sep. 30, 2019 shares
Restricted Stock Units (RSUs) [Member] |
Unvested shares |
Outstanding, shares at beginning | 987,563
Granted | 341,459
Forfeited | (46,503)
Vested and issued | (413,877)
Outstanding at ending | 247,999
Outstanding, shares at ending | 868,642
Performance Shares [Member] |
Unvested shares |
Outstanding, shares at beginning | 532,086
Granted | 152,656
Vested and issued | (180,258)
Outstanding, shares at ending | 504,484
Progressive Waste Solutions Ltd. [Member] | Restricted Stock Units (RSUs) [Member] |
Unvested shares |
Outstanding at beginning | 122,259
Cash settled | (46,023)
Forfeited | (2,352)
Outstanding at ending | 73,884
Progressive Waste Solutions Ltd. [Member] | Performance Shares [Member] |
Unvested shares |
Outstanding at beginning | 22,791
Cash settled | (22,791)

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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://fasb.org/us-gaap/role/ref/legacyRef -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=116856206&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://fasb.org/us-gaap/role/ref/legacyRef -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=116856206&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://fasb.org/us-gaap/role/ref/legacyRef -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=116856206&loc=d3e5070-113901 + Details
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- Definition Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Cash Settled In Period + References No definition available. + 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 Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Rollforward [Abstract] + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested and issued during the reporting period. + References No definition available. + Details
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