Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income	$ 57,641	$ 62,900	$ 109,723	$ 112,122
Other comprehensive income (loss), before tax:
Other comprehensive income (loss), before tax	1,088	(1,162)	(3,251)	(996)
Income tax (expense) benefit related to items of other comprehensive income (loss)	(417)	446	1,247	385
Other comprehensive income (loss), net of tax	671	(716)	(2,004)	(611)
Comprehensive income	58,312	62,184	107,719	111,511
Less: Comprehensive income attributable to noncontrolling interests	(281)	(236)	(539)	(443)
Comprehensive income attributable to Waste Connections	58,031	61,948	107,180	111,068
Interest Rate Swap [Member]
Other comprehensive income (loss), before tax:
Amounts reclassified, gross	1,037	886	2,072	1,954
Changes in fair value, gross	1,036	(2,210)	(4,437)	(2,504)
Fuel [Member] | Commodity Contract [Member]
Other comprehensive income (loss), before tax:
Amounts reclassified, gross	677	(304)	1,292	(627)
Changes in fair value, gross	$ (1,662)	$ 466	$ (2,178)	$ 181