Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net income	$ 233,327us-gaap_ProfitLoss	$ 196,005us-gaap_ProfitLoss	$ 159,660us-gaap_ProfitLoss
Other comprehensive income (loss), before tax:
Other comprehensive income (loss), before tax	(6,045)	6,949	(4,363)
Income tax (expense) benefit related to items of other comprehensive income	2,321	(2,653)	1,678
Other comprehensive income (loss), net of tax	(3,724)	4,296	(2,685)
Comprehensive income	229,603	200,301	156,975
Less: Comprehensive income attributable to noncontrolling interests	(802)	(350)	(567)
Comprehensive income attributable to Waste Connections	228,801us-gaap_ComprehensiveIncomeNetOfTax	199,951us-gaap_ComprehensiveIncomeNetOfTax	156,408us-gaap_ComprehensiveIncomeNetOfTax
Interest Rate Swap [Member]
Other comprehensive income (loss), before tax:
Amounts reclassified, gross	4,581	5,641	5,289
Changes in fair value, gross	(6,448)	296	(7,333)
Fuel [Member] \| Commodity Contract [Member]
Other comprehensive income (loss), before tax:
Amounts reclassified, gross	(823)		(4,513)
Changes in fair value, gross	$ (3,355)	$ 1,012	$ 2,194

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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