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Condensed Consolidated Statements of Net Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenues	$ 1,206,478	$ 1,084,922	$ 3,473,313	$ 2,327,241
Operating expenses:
Cost of operations	695,122	636,310	2,024,402	1,339,764
Selling, general and administrative	128,200	129,576	383,600	349,995
Depreciation	136,941	125,744	395,008	270,988
Amortization of intangibles	26,613	26,944	76,886	48,719
Impairments and other operating items	832	7,682	141,333	4,634
Operating income	218,770	158,666	452,084	313,141
Interest expense	(32,471)	(27,621)	(92,763)	(65,291)
Interest income	1,656	171	3,131	447
Other income (expense), net	1,709	500	3,561	(268)
Foreign currency transaction gain (loss)	(1,864)	(350)	(3,502)	339
Income before income tax provision	187,800	131,366	362,511	248,368
Income tax provision	(64,390)	(42,485)	(100,220)	(86,750)
Net income	123,410	88,881	262,291	161,618
Less: Net income attributable to noncontrolling interests	(183)	(264)	(559)	(670)
Net income attributable to Waste Connections	$ 123,227	$ 88,617	$ 261,732	$ 160,948
Earnings per common share attributable to Waste Connections' common stockholders:
Basic	$ 0.47	$ 0.34	$ 0.99	$ 0.73
Diluted	$ 0.47	$ 0.34	$ 0.99	$ 0.73
Shares used in the per share calculations:
Basic	263,443,064	263,005,450	263,298,839	219,321,828
Diluted	264,299,472	263,650,138	264,109,383	220,064,670
Cash dividends per common share	$ 0.120	$ 0.097	$ 0.360	$ 0.290

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