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Condensed Consolidated Statements of Net Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenues	$ 1,369,639	$ 1,239,968	$ 2,614,275	$ 2,380,099
Operating expenses:
Cost of operations	815,819	725,022	1,549,508	1,384,825
Selling, general and administrative	139,664	128,261	272,249	259,568
Depreciation	156,776	142,450	303,623	275,634
Amortization of intangibles	31,344	26,474	61,886	52,573
Impairments and other operating items	3,902	7,073	20,014	8,104
Operating income	222,134	210,688	406,995	399,395
Interest expense	(37,245)	(32,426)	(74,533)	(64,796)
Interest income	1,818	1,056	5,129	2,210
Other income, net	805	2,031	3,363	1,644
Foreign currency transaction gain (loss)	1,115	30	1,218	(190)
Income before income tax provision	188,627	181,379	342,172	338,263
Income tax provision	(39,788)	(42,565)	(67,756)	(74,417)
Net income	148,839	138,814	274,416	263,846
Plus (less): Net loss (income) attributable to noncontrolling interests	9	(132)	54	(295)
Net income attributable to Waste Connections	$ 148,848	$ 138,682	$ 274,470	$ 263,551
Earnings per common share attributable to Waste Connections' common shareholders:
Basic	$ 0.56	$ 0.53	$ 1.04	$ 1.00
Diluted	$ 0.56	$ 0.52	$ 1.04	$ 1.00
Shares used in the per share calculations:
Basic	263,846,970	263,691,172	263,725,867	263,757,179
Diluted	264,494,943	264,332,029	264,416,610	264,452,785
Cash dividends per common share	$ 0.16	$ 0.14	$ 0.32	$ 0.28

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