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Shareholders' Equity (Summary of Activity Related to Restricted Stock Units) (Details)
6 Months Ended
Jun. 30, 2022
shares
Restricted Stock Units (RSUs) [Member]  
Unvested shares  
Outstanding, shares at beginning 861,695
Granted 425,900
Forfeited (34,124)
Vested and issued (313,228)
Outstanding at ending 81,712
Outstanding, shares at ending 940,243
Performance Shares [Member]  
Unvested shares  
Outstanding, shares at beginning 392,043
Granted 95,038
Forfeited (87,554)
Vested and issued (57,677)
Outstanding, shares at ending 341,850
Progressive Waste Solutions Ltd. [Member] | Restricted Stock Units (RSUs) [Member]  
Unvested shares  
Outstanding at beginning 63,032
Cash settled (5,203)
Outstanding at ending 57,829