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Consolidated Statements of Net Income - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Statement [Abstract]      
Revenues $ 6,151,361 $ 5,445,990 $ 5,388,679
Operating expenses:      
Cost of operations 3,654,074 3,276,808 3,198,757
Selling, general and administrative 612,337 537,632 546,278
Depreciation 673,730 621,102 618,396
Amortization of intangibles 139,279 131,302 125,522
Impairments and other operating items 32,316 466,718 61,948
Operating income 1,039,625 412,428 837,778
Interest expense (162,796) (162,375) (147,368)
Interest income 2,916 5,253 9,777
Other income (expense), net 6,285 (1,392) 5,704
Loss on early extinguishment of debt (115,288)    
Income before income tax provision 770,742 253,914 705,891
Income tax provision (152,253) (49,922) (139,210)
Net income 618,489 203,992 566,681
Plus (Less): Net loss (income) attributable to noncontrolling interests (442) 685 160
Net income attributable to Waste Connections $ 618,047 $ 204,677 $ 566,841
Earnings per common share attributable to Waste Connections' common shareholders:      
Basic $ 2.37 $ 0.78 $ 2.15
Diluted $ 2.36 $ 0.78 $ 2.14
Shares used in the per share calculations:      
Basic 261,166,723 263,189,699 263,792,693
Diluted 261,728,470 263,687,539 264,526,561
Cash dividends per common share $ 0.845 $ 0.760 $ 0.665