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Shareholders' Equity (Tables)
9 Months Ended
Sep. 30, 2020
Restricted Stock Units (RSUs) [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Summary of Activity Related to Restricted Share Units

A summary of activity related to restricted share units (“RSUs”) during the nine-month period ended September 30, 2020, is presented below:

    

Unvested Shares

Outstanding at December 31, 2019

 

861,012

Granted

 

326,045

Forfeited

 

(33,181)

Vested and issued

 

(375,368)

Outstanding at September 30, 2020

 

778,508

Performance Shares [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Summary of Performance-Based Restricted Share Units Activity and Related Information

A summary of activity related to performance-based restricted share units (“PSUs”) during the nine-month period ended September 30, 2020, is presented below:

    

Unvested Shares

Outstanding at December 31, 2019

 

504,484

Granted

 

211,987

Forfeited

 

(727)

Vested and issued

 

(281,186)

Outstanding at September 30, 2020

 

434,558

Deferred Share Units [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Summary of Activity Related to Restricted Share Units

A summary of activity related to deferred share units (“DSUs”) during the nine-month period ended September 30, 2020, is presented below:

    

Vested Shares

Outstanding at December 31, 2019

 

18,970

Granted

 

2,616

Outstanding at September 30, 2020

 

21,586

Progressive Waste Solutions Ltd. [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Summary of Stock Option Activity and Related Information

Outstanding at December 31, 2019

    

126,161

Cash settled

 

(74,461)

Outstanding at September 30, 2020

 

51,700

Progressive Waste Solutions Ltd. [Member] | Restricted Stock Units (RSUs) [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Summary of Activity Related to Restricted Share Units

Outstanding at December 31, 2019

    

73,884

Cash settled

 

(7,330)

Outstanding at September 30, 2020

 

66,554