Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net income	$ 138,814	$ 123,887	$ 263,846	$ 138,907
Other comprehensive income (loss), before tax:
Foreign currency translation adjustment	(43,474)	53,193	(102,804)	70,627
Other comprehensive income (loss), before tax	(41,194)	50,897	(89,887)	68,179
Income tax (expense) benefit related to items of other comprehensive income (loss)	(594)	(1,338)	(3,420)	930
Other comprehensive income (loss), net of tax	(41,788)	49,559	(93,307)	69,109
Comprehensive income	97,026	173,446	170,539	208,016
Less: Comprehensive income attributable to noncontrolling interests	(132)	(231)	(295)	(377)
Comprehensive income attributable to Waste Connections	96,894	173,215	170,244	207,639
Interest Rate Swap [Member]
Other comprehensive income (loss), before tax:
Amounts reclassified, gross	(1,273)	760	(1,872)	1,841
Changes in fair value, gross	3,196	(2,904)	14,965	(1,876)
Fuel [Member] | Commodity Contract [Member]
Other comprehensive income (loss), before tax:
Amounts reclassified, gross	(1,688)	1,012	(2,837)	1,976
Changes in fair value, gross	$ 2,045	$ (1,164)	$ 2,661	$ (4,389)