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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended						6 Months Ended	9 Months Ended		76 Months Ended
	Oct. 31, 2021	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jul. 31, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Jul. 26, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of shares under employee share purchase plan		$ 1,716		$ 1,554	$ 1,275				$ 3,271
Issuance of shares under employee share purchase plan, shares									26,582
Maximum number of shares authorized for repurchase												12,859,066
Share repurchase plan expiration date									Aug. 09, 2023
Daily repurchase of shares, maximum								85,956
Average daily trading volume during period								343,825
Repurchase of common stock (shares)									3,388,155	2,745,990
Aggregate cost of stock repurchased				424,999		$ 239,641	$ 65,999		$ 424,999	$ 305,640
Maximum remaining number of shares available for repurchase		12,859,066							12,859,066		12,859,066
Cash dividend per share	$ 0.23	$ 0.230			$ 0.205				$ 0.690	$ 0.615
Cash dividend per common share, increase	$ 0.025
Cash dividends on common stock		$ 58,897	$ 59,421	$ 59,391	$ 53,424	$ 53,421	$ 53,909		$ 177,710	$ 160,754
Employee Share Purchase Plan 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum percent of eligible compensation to purchase shares		1.00%							1.00%		1.00%
Maximum percent of eligible compensation to purchase shares		10.00%							10.00%		10.00%
Maximum number of share authorized to be issued under plan		1,000,000							1,000,000		1,000,000
Minimum [Member] \| Employee Share Purchase Plan 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price percentage of closing price of common shares									85.00%
Maximum [Member] \| Employee Share Purchase Plan 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price percentage of closing price of common shares									95.00%
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant-date fair value of award									$ 120.55
Units granted in period									463,457
Vested deferred RSUs outstanding		81,352			100,861				81,352	100,861	81,352
Restricted Stock Units (RSUs) [Member] \| Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted in period											0
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant-date fair value of award									$ 117.94
Units granted in period									95,038
Performance Shares [Member] \| 2022 Performance Based Restricted Share Units Plan One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award									3 years
Performance period end date									Dec. 31, 2024
Employee Stock Option [Member] \| Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted in period											0
Deferred Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant-date fair value of award									$ 121.00
Units granted in period									2,094
Vested deferred RSUs outstanding		26,536							26,536		26,536		24,442
Progressive Waste Solutions Ltd. [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested deferred RSUs outstanding		57,829							57,829		57,829		63,032