Basis of Presentation and Summary	9 Months Ended
Sep. 30, 2011
Basis of Presentation and Summary [Abstract]
BASIS OF PRESENTATION AND SUMMARY	1. BASIS OF PRESENTATION AND SUMMARY The accompanying condensed consolidated financial statements relate to Waste Connections, Inc. and its subsidiaries (“WCI” or the “Company”) for the three and nine month periods ended September 30, 2011 and 2010. In the opinion of management, the accompanying balance sheets and related interim statements of income, cash flows and equity and comprehensive income include all adjustments, consisting only of normal recurring items, necessary for their fair presentation in conformity with U.S. generally accepted accounting principles (“GAAP”). Preparing financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses. Examples include accounting for landfills, self-insurance, income taxes, allocation of acquisition purchase price and asset impairments. An additional area that involves estimation is when the Company estimates the amount of potential exposure it may have with respect to litigation, claims and assessments in accordance with the accounting guidance on contingencies. Actual results for all estimates could differ materially from the estimates and assumptions that the Company uses in the preparation of its condensed consolidated financial statements. Interim results are not necessarily indicative of results for a full year. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations and the financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2010.

1. BASIS OF PRESENTATION AND SUMMARY

The accompanying condensed consolidated financial statements relate to Waste Connections, Inc. and its subsidiaries (“WCI” or the “Company”) for the three and nine month periods ended September 30, 2011 and 2010. In the opinion of management, the accompanying balance sheets and related interim statements of income, cash flows and equity and comprehensive income include all adjustments, consisting only of normal recurring items, necessary for their fair presentation in conformity with U.S. generally accepted accounting principles (“GAAP”). Preparing financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses. Examples include accounting for landfills, self-insurance, income taxes, allocation of acquisition purchase price and asset impairments. An additional area that involves estimation is when the Company estimates the amount of potential exposure it may have with respect to litigation, claims and assessments in accordance with the accounting guidance on contingencies. Actual results for all estimates could differ materially from the estimates and assumptions that the Company uses in the preparation of its condensed consolidated financial statements.

Interim results are not necessarily indicative of results for a full year. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations and the financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2010.