Waste Connections (WCN) 10-Q 31 Oct 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 21, 2016
Document Documentand Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Entity Registrant Name	WASTE CONNECTIONS, INC.
Entity Central Index Key	1,318,220
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		175,141,438

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and equivalents	$ 119,335	$ 10,974
Accounts receivable, net of allowance for doubtful accounts of $14,033 and $7,738 at September 30, 2016 and December 31, 2015, respectively	498,291	255,192
Deferred income taxes	82,547	49,727
Prepaid expenses and other current assets	84,460	46,534
Total current assets	784,633	362,427
Property and equipment, net	4,773,096	2,738,288
Goodwill	4,351,170	1,422,825
Intangible assets, net	1,164,308	511,294
Restricted assets	63,314	46,232
Other assets, net	51,172	40,732
Total assets	11,187,693	5,121,798
Current liabilities:
Accounts payable	247,295	115,206
Book overdraft	18,363	12,357
Accrued liabilities	266,906	136,018
Deferred revenue	130,724	90,349
Current portion of contingent consideration	24,338	22,217
Current portion of long-term debt and notes payable	1,624	2,127
Total current liabilities	689,250	378,274
Long-term debt and notes payable	3,661,971	2,147,127
Long-term portion of contingent consideration	27,351	27,177
Other long-term liabilities	329,058	124,943
Deferred income taxes	858,697	452,493
Total liabilities	5,566,327	3,130,014
Commitments and contingencies (Note 16)
Equity:
Common shares: 175,140,948 and 122,375,955 shares issued and outstanding at September 30, 2016 and December 31, 2015, respectively	4,170,279	1,224
Additional paid-in capital	97,418	736,652
Accumulated other comprehensive loss	(13,024)	(12,171)
Treasury shares: 284,739 and 0 shares at September 30, 2016 and December 31, 2015, respectively
Retained earnings	1,359,442	1,259,495
Total Waste Connections' equity	5,614,115	1,985,200
Noncontrolling interest in subsidiaries	7,251	6,584
Total equity	5,621,366	1,991,784
Total liabilities and stockholders' equity	$ 11,187,693	$ 5,121,798

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 14,033	$ 7,738
Common stock, shares issued	175,140,948	122,375,955
Common stock, shares outstanding	175,140,948	122,375,955
Treasury shares	284,739	0

Condensed Consolidated Statemen

Condensed Consolidated Statements of Net Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Revenues	$ 1,084,922	$ 547,938	$ 2,327,241	$ 1,585,350
Operating expenses:
Cost of operations	636,310	300,910	1,339,764	879,470
Selling, general and administrative	129,576	59,799	349,995	175,208
Depreciation	125,744	61,373	270,988	178,318
Amortization of intangibles	26,944	7,195	48,719	21,458
Impairments and other operating items	7,682	493,813	4,634	494,158
Operating income (loss)	158,666	(375,152)	313,141	(163,262)
Interest expense	(27,621)	(16,367)	(65,291)	(47,386)
Other income (expense), net	671	(1,303)	179	(1,430)
Foreign currency transaction gain	(350)		339
Income (loss) before income tax provision	131,366	(392,822)	248,368	(212,078)
Income tax (provision) benefit	(42,485)	136,017	(86,750)	64,996
Net income (loss)	88,881	(256,805)	161,618	(147,082)
Less: Net income attributable to noncontrolling interests	(264)	(204)	(670)	(743)
Net income (loss) attributable to Waste Connections	$ 88,617	$ (257,009)	$ 160,948	$ (147,825)
Earnings (loss) per common share attributable to Waste Connections' common stockholders:
Basic	$ 0.51	$ (2.08)	$ 1.10	$ (1.19)
Diluted	$ 0.50	$ (2.08)	$ 1.10	$ (1.19)
Shares used in the per share calculations:
Basic	175,336,967	123,269,902	146,214,552	123,783,217
Diluted	175,766,759	123,269,902	146,709,780	123,783,217
Cash dividends per common share	$ 0.145	$ 0.13	$ 0.435	$ 0.39

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income (loss)	$ 88,881	$ (256,805)	$ 161,618	$ (147,082)
Other comprehensive income (loss), before tax:
Foreign currency translation adjustment	(16,642)		(3,991)
Other comprehensive income (loss), before tax	(9,068)	(9,042)	69	(12,293)
Income tax (expense) benefit related to items of other comprehensive income (loss)	(2,282)	3,403	(922)	4,650
Other comprehensive income (loss), net of tax	(11,350)	(5,639)	(853)	(7,643)
Comprehensive income (loss)	77,531	(262,444)	160,765	(154,725)
Less: Comprehensive income attributable to noncontrolling interests	(264)	(204)	(670)	(743)
Comprehensive income (loss) attributable to Waste Connections	77,267	(262,648)	160,095	(155,468)
Interest Rate Swap [Member]
Other comprehensive income (loss), before tax:
Amounts reclassified, gross	1,678	1,041	5,081	3,114
Changes in fair value, gross	3,535	(6,066)	(6,980)	(10,503)
Fuel [Member] | Commodity Contract [Member]
Other comprehensive income (loss), before tax:
Amounts reclassified, gross	1,342	874	4,616	2,165
Changes in fair value, gross	$ 1,019	$ (4,891)	$ 1,343	$ (7,069)

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Equity - USD ($) $ in Thousands	Common Stock [Member]Deferred Compensation Plan [Member]	Common Stock [Member]Performance Shares [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Noncontrolling Interests [Member]	Total
Beginning Balances at Dec. 31, 2014			$ 1,240	$ 811,289	$ (5,593)		$ 1,421,249	$ 5,556	$ 2,233,741
Beginning Balances, shares at Dec. 31, 2014			123,984,527
Acquired common shares held in trust						1,050,820			1,050,820
Restricted share units (shares)	13,652		432,165
Restricted share units			$ 4	(4)
Tax withholdings related to net share settlements of restricted stock units			$ (1)	(6,440)					$ (6,441)
Tax withholdings related to net share settlements of restricted stock units, shares			(138,493)
Equity-based compensation				14,433					14,433
Exercise of stock options and warrants				494					494
Exercise of stock options and warrants, shares			40,205
Excess tax benefit associated with equity-based compensation				1,986					$ 1,986
Repurchase of common stock (shares)						1,050,820			1,050,820
Repurchase of common stock (shares)			(912,169)						(1,962,989)
Repurchase of common stock						$ (49,458)			$ (49,458)
Repurchase of common stock			$ (9)	(41,698)					(91,165)
Cash dividends on common stock							(48,246)		(48,246)
Amounts reclassified into earnings, net of taxes					3,270				3,270
Changes in fair value of cash flow hedges, net of taxes					(10,913)				(10,913)
Distributions to noncontrolling interests								(43)	(43)
Net income (loss)							(147,825)	743	(147,082)
Ending Balances at Sep. 30, 2015			$ 1,234	780,060	(13,236)	$ (49,458)	1,225,178	6,256	1,950,034
Ending Balances, shares at Sep. 30, 2015			123,419,887
Ending Balance, treasury shares at Sep. 30, 2015						1,050,820
Beginning Balances at Dec. 31, 2015			$ 1,224	736,652	(12,171)		1,259,495	6,584	$ 1,991,784
Beginning Balances, shares at Dec. 31, 2015			122,375,955						122,375,955
Beginning Balance, treasury shares at Dec. 31, 2015									0
Conversion of Old Waste Connections' common shares into common shares of New Waste Connections, APIC				(650,552)
Conversion of Old Waste Connections' common shares into common shares of New Waste Connections			$ 650,552
Issuance of common shares to acquire Progressive Waste			$ 3,503,162						$ 3,503,162
Issuance of common shares to acquire Progressive Waste, shares			52,145,919
Acquired common shares held in trust						490,112
Sale of common shares held in trust			$ 15,341						15,341
Sale of common shares held in trust, shares			205,373			(205,373)
Restricted share units (shares)	39,328	122,960	402,626
Tax withholdings related to net share settlements of restricted share units				(11,461)					(11,461)
Tax withholdings related to net share settlements of restricted share units, shares			(186,037)
Equity-based compensation				17,628					17,628
Exercise of warrants, shares			34,824
Excess tax benefit associated with equity-based compensation				5,151					$ 5,151
Repurchase of common stock (shares)									0
Cash dividends on common stock							(61,001)		$ (61,001)
Amounts reclassified into earnings, net of taxes					6,193				6,193
Changes in fair value of cash flow hedges, net of taxes					(3,055)				(3,055)
Foreign currency translation adjustment					(3,991)				(3,991)
Distributions to noncontrolling interests								(3)	(3)
Net income (loss)							160,948	670	161,618
Ending Balances at Sep. 30, 2016			$ 4,170,279	$ 97,418	$ (13,024)		$ 1,359,442	$ 7,251	$ 5,621,366
Ending Balances, shares at Sep. 30, 2016			175,140,948						175,140,948
Ending Balance, treasury shares at Sep. 30, 2016						284,739			284,739

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income (loss)	$ 161,618	$ (147,082)
Adjustments to reconcile net income to net cash provided by operating activities:
Loss (gain) on disposal of assets	3,572	513,872
Depreciation	270,988	178,318
Amortization of intangibles	48,719	21,458
Foreign currency transaction gain	(339)
Deferred income taxes, net of acquisitions	35,968	(161,811)
Amortization of debt issuance costs	3,877	2,428
Share-based compensation	35,476	14,433
Interest income on restricted assets	(366)	(319)
Interest accretion	7,038	5,346
Excess tax benefit associated with equity-based compensation	(5,151)	(1,986)
Adjustments to contingent consideration	(2,563)	(19,809)
Payment of contingent consideration recorded in earnings	(413)
Net change in operating assets and liabilities, net of acquisitions	(19,593)	58,480
Net cash provided by operating activities	538,831	463,328
Cash flows from investing activities:
Payments for acquisitions, net of cash acquired	(13,703)	(112,090)
Cash acquired from acquisition	65,739
Capital expenditures for property and equipment	(204,934)	(168,379)
Proceeds from disposal of assets	3,026	1,676
Change in restricted assets, net of interest income	(188)	(367)
Other	(2,987)	2,163
Net cash used in investing activities	(153,047)	(276,997)
Cash flows from financing activities:
Proceeds from long-term debt	3,407,359	914,500
Principal payments on notes payable and long-term debt	(3,612,763)	(941,440)
Payment of contingent consideration recorded at acquisition date	(12,105)	(190)
Change in book overdraft	6,050	65
Proceeds from option and warrant exercises		494
Excess tax benefit associated with equity-based compensation	5,151	1,986
Payments for repurchase of common stock		(91,165)
Payments for cash dividends	(61,001)	(48,246)
Tax withholdings related to net share settlements of restricted stock units	(11,461)	(6,441)
Distributions to noncontrolling interests	(3)	(43)
Debt issuance costs	(13,508)	(6,651)
Proceeds from sale of common shares held in trust	15,341
Net cash used in financing activities	(276,940)	(177,131)
Effect of foreign currency translation on cash and equivalents	(483)
Net increase (decrease) in cash and equivalents	108,361	9,200
Cash and equivalents at beginning of period	10,974	14,353
Cash and equivalents at end of period	119,335	23,553
Non-cash financing activity:
Liabilities assumed and notes payable issued to sellers of businesses acquired	2,572,034	$ 12,734
Issuance of common shares to acquire Progressive Waste	$ 3,503,162

Basis of Presentation and Summa

Basis of Presentation and Summary	9 Months Ended
	Sep. 30, 2016
Basis of Presentation and Summary [Abstract]
Basis of Presentation and Summary	1. BASIS OF PRESENTATION AND SUMMARY On June 1, 2016, pursuant to the terms of the Agreement and Plan of Merger dated as of January 18, 2016 (the “Merger Agreement”), Water Merger Sub LLC (“Merger Sub”), a Delaware limited liability company and a wholly-owned subsidiary of Progressive Waste Solutions Ltd., merged with and into Waste Connections US, Inc. (f/k/a Waste Connections, Inc.), a Delaware corporation (“Old Waste Connections”) with Old Waste Connections continuing as the surviving corporation and an indirect wholly-owned subsidiary of Waste Connections, Inc. (f/k/a Progressive Waste Solutions Ltd.), a corporation organized under the laws of Ontario, Canada. Following the closing of the transaction, Old Waste Connections’ common stock was delisted from the New York Stock Exchange (“NYSE”) and deregistered under the U.S. Securities Exchange Act of 1934, as amended (the “Exchange Act”). Pursuant to the Merger Agreement, Old Waste Connections’ stockholders received common shares of Waste Connections, Inc. (f/k/a Progressive Waste Solutions Ltd.) in exchange for their shares of common stock of Old Waste Connections. As further discussed in Note 6 – “Acquisitions,” the Progressive Waste acquisition was accounted for as a reverse merger using the acquisition method of accounting. Old Waste Connections has been identified as the acquirer for accounting purposes and the acquisition method of accounting has been applied. The term “Progressive Waste” is used herein in the context of references to Progressive Waste Solutions Ltd. and its shareholders prior to the completion of the Progressive Waste acquisition on June 1, 2016. The accompanying condensed consolidated financial statements relating to Waste Connections, Inc. (f/k/a Progressive Waste Solutions Ltd., and together with its subsidiaries, “New Waste Connections,” “WCI” or the “Company”) are the historical financial statements of Old Waste Connections for the three and nine month periods ended September 30, 2016 and 2015, with the inclusion on June 1, 2016 of the fair value of the assets and liabilities acquired from Progressive Waste and the inclusion of the results of operations from the acquired Progressive Waste operations commencing on June 1, 2016. In the opinion of management, the accompanying balance sheets and related interim statements of net income, comprehensive income, cash flows and equity include all adjustments, consisting only of normal recurring items, necessary for their fair statement 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, revenues and expenses. Examples include accounting for landfills, self-insurance accruals, income taxes, allocation of acquisition purchase price, contingent consideration accruals 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. These interim financial statements should be read in conjunction with the financial statements and notes thereto included in Old Waste Connections’ Annual Report on Form 10-K for the fiscal year ended December 31, 2015.

Reporting Currency

Reporting Currency	9 Months Ended
	Sep. 30, 2016
Reporting Currency [Abstract]
Reporting Currency	2. REPORTING CURRENCY The functional currency of the Company’s parent corporate entity and the operating subsidiaries in the United States is the U.S. dollar. The functional currency of the Company’s Canadian operations is the Canadian dollar. The reporting currency of the Company is the U.S. dollar. The Company’s consolidated Canadian dollar financial position is translated to U.S. dollars by applying the foreign currency exchange rate in effect at the consolidated balance sheet date. The Company’s consolidated Canadian dollar results of operations and cash flows are translated to U.S. dollars by applying the average foreign currency exchange rate in effect during the reporting period. The resulting translation adjustments are included in other comprehensive income or loss. Gains and losses from foreign currency transactions are included in earnings for the period.

New Accounting Standards

New Accounting Standards	9 Months Ended
	Sep. 30, 2016
New Accounting Standards [Abstract]
New Accounting Standards	3. NEW ACCOUNTING STANDARDS Revenue From Contracts With Customers . In May 2014, the Financial Accounting Standards Board (the “FASB”) issued guidance to provide a single, comprehensive revenue recognition model for all contracts with customers. The revenue guidance contains principles that an entity will apply to determine the measurement of revenue and timing of when it is recognized. The underlying principle is that an entity will recognize revenue to depict the transfer of goods or services to customers at an amount that the entity expects to be entitled to in exchange for those goods or services. The standard will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017 for public entities, with early adoption permitted (but not earlier than the original effective date of the pronouncement). The Company is currently assessing the impact that adopting this new accounting standard will have on its consolidated financial statements and footnote disclosures. Accounting for Share-Based Payment When the Terms of an Award Provide That a Performance Target Could Be Achieved After the Requisite Service Period . In June 2014, the FASB issued guidance that applies to all reporting entities that grant their employees share-based payments in which the terms of the award provide that a performance target that affects vesting could be achieved after the requisite service period. It requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition and follows existing accounting guidance for the treatment of performance conditions. The standard will be effective for annual periods and interim periods within those annual periods beginning after December 15, 2015, with early adoption permitted. The Company adopted this guidance as of January 1, 2016. The adoption of this guidance did not have a material impact on the Company’s financial position or results of operations. Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern . In August 2014, the FASB issued guidance that requires management to evaluate, for each annual and interim reporting period, whether there are conditions and events, considered in the aggregate, that raise substantial doubt about an entity’s ability to continue as a going concern within one year after the date the financial statements are issued or are available to be issued. If substantial doubt is raised, additional disclosures around management’s plan to alleviate these doubts are required. This update will become effective for all annual periods and interim reporting periods ending after December 15, 2016. This standard is not expected to have any impact on current disclosures in the financial statements. Balance Sheet Classification of Deferred Taxes . In November 2015, the FASB issued guidance that requires that all deferred tax assets and liabilities, along with any related valuation allowance, be classified as noncurrent on the balance sheet. As a result, each jurisdiction will now only have one net noncurrent deferred tax asset or liability. The guidance does not change the existing requirement that only permits offsetting within a jurisdiction. The new standard is effective in fiscal years beginning after December 15, 2016, including interim periods within those years, with early adoption permitted. The adoption of this guidance will result in the Company’s current deferred tax assets being recorded as noncurrent on a prospective basis. The Company’s current deferred tax assets were $82,547 and $49,727 at September 30, 2016 and December 31, 2015, respectively. Lease Accounting . In February 2016, the FASB issued guidance that requires lessees to recognize a right-of-use asset and a lease liability for virtually all of their leases (other than leases that meet the definition of a short-term lease). The liability will be equal to the present value of lease payments. The asset will be based on the liability, subject to adjustment, such as for initial direct costs. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Operating leases will result in straight-line expense (similar to current operating leases) while finance leases will result in a front-loaded expense pattern (similar to current capital leases). Classification will be based on criteria that are largely similar to those applied in current lease accounting, but without explicit bright lines. The new standard is effective for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. The new standard must be adopted using a modified retrospective transition, and provides for certain practical expedients. Transition will require application of the new guidance at the beginning of the earliest comparative period presented. The Company has not determined the effect the adoption of this lease accounting guidance will have on its financial position or results of operations. Improvements to Employee Share-Based Payment Accounting . In March 2016, the FASB issued guidance that identifies areas for simplification involving several aspects of accounting for share-based payment transactions, including classification of awards as either equity or liabilities, an option to recognize gross stock compensation expense with actual forfeitures recognized as they occur, certain classifications on the statement of cash flows and income tax consequences including that all income tax effects of awards are to be recognized in the income statement when the awards are settled whereas previously the tax benefits in excess of compensation cost were recorded in equity. The new standard is effective for public companies for annual reporting periods beginning after December 15, 2016, and interim periods within that reporting period. Early adoption will be permitted in any interim or annual period, with any adjustments reflected as of the beginning of the fiscal year of adoption. The Company is currently assessing the impact that adopting this new accounting standard will have on its consolidated financial statements and footnote disclosures.  Principal versus Agent Considerations (Reporting Revenue Gross versus Net) . In March 2016, the FASB issued guidance that clarifies the implementation of the new revenue standard on principal versus agent considerations. The guidance includes indicators to assist an entity in determining whether it controls a specified good or service before it is transferred to the customers. The amendments have the same effective date and transition requirements as the new revenue standard, which is described above. The Company is currently assessing the impact that adopting this new accounting standard will have on its consolidated financial statements and footnote disclosures. Classification of Certain Cash Receipts and Cash Payments . In August 2016, the FASB issued guidance that addresses eight targeted changes with respect to how cash receipts and cash payments are classified in the statements of cash flows, with the objective of reducing diversity in practice . The new standard is effective for public companies for financial statements issued for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, provided that all of the amendments are adopted in the same period. The guidance requires application using a retrospective transition method. The Company does not expect the adoption of this guidance to have a material impact on the Company’s statement of cash flows. 

Reclassification

Reclassification	9 Months Ended
	Sep. 30, 2016
Reclassification [Abstract]
Reclassification	4. RECLASSIFICATION Certain amounts reported in the Company’s prior year financial statements have been reclassified to conform with the 2016 presentation.

Landfill Accounting

Landfill Accounting	9 Months Ended
	Sep. 30, 2016
Landfill Accounting [Abstract]
Landfill Accounting	5. LANDFILL ACCOUNTING At September 30, 2016, the Company owned or operated 69 municipal solid waste (“MSW”) landfills, 11 exploration and production (“E&P”) waste landfills, which only accept E&P waste, and 14 non-MSW landfills, which only accept construction and demolition, industrial and other non-putrescible waste. At September 30, 2016, the Company’s landfills consisted of 80 owned landfills, eight landfills operated under life-of-site operating agreements and six landfills operated under limited-term operating agreements. The Company’s landfills had site costs with a net book value of $2,774,659 at September 30, 2016. For the Company’s landfills operated under limited-term operating agreements and life-of-site operating agreements, the owner of the property (generally a municipality) usually owns the permit and the Company operates the landfill for a contracted term. Where the contracted term is not the life of the landfill, the property owner is generally responsible for final capping, closure and post-closure obligations. The Company is responsible for all final capping, closure and post-closure liabilities at the landfills it operates under life-of-site operating agreements. The Company’s internal and third-party engineers perform surveys at least annually to estimate the remaining disposal capacity at its landfills. Many of the Company’s existing landfills have the potential for expanded disposal capacity beyond the amount currently permitted. The Company’s landfill depletion rates are based on the remaining disposal capacity, considering both permitted and probable expansion airspace, at the landfills it owns and landfills it operates, but does not own, under life-of-site agreements. The Company’s landfill depletion rate is based on the term of the operating agreement at its operated landfill that has capitalized expenditures. Expansion airspace consists of additional disposal capacity being pursued through means of an expansion that has not yet been permitted. Expansion airspace that meets certain criteria is included in the estimate of total landfill airspace. Based on remaining permitted capacity as of September 30, 2016, and projected annual disposal volumes, the average remaining landfill life for the Company’s owned landfills and landfills operated under life-of-site operating agreements is estimated to be approximately 28 years. As of September 30, 2016, the Company is seeking to expand permitted capacity at 17 of its owned landfills and two landfills that it operates under life-of-site operating agreements, and considers the achievement of these expansions to be probable. Although the Company cannot be certain that all future expansions will be permitted as designed, the average remaining life, when considering remaining permitted capacity, probable expansion capacity and projected annual disposal volume, of the Company’s owned landfills and landfills operated under life-of-site operating agreements is approximately 34 years, with lives ranging from approximately 1 to 185 years. During the nine months ended September 30, 2016 and 2015, the Company expensed $98,075 and $61,226 , respectively, or an average of $4.27 and $3.87 per ton consumed, respectively, related to landfill depletion at owned landfills and landfills operated under life-of-site agreements. The Company reserves for estimated final capping, closure and post-closure maintenance obligations at the landfills it owns and landfills it operates under life-of-site operating agreements. The Company calculates the net present value of its final capping, closure and post-closure liabilities by estimating the total obligation in current dollars, inflating the obligation based upon the expected date of the expenditure and discounting the inflated total to its present value using a credit-adjusted risk-free rate. Any changes in expectations that result in an upward revision to the estimated undiscounted cash flows are treated as a new liability and are inflated and discounted at rates reflecting current market conditions. Any changes in expectations that result in a downward revision (or no revision) to the estimated undiscounted cash flows result in a liability that is inflated and discounted at rates reflecting the market conditions at the time the cash flows were originally estimated. This policy results in the Company’s final capping, closure and post-closure liabilities being recorded in “layers.” The Company’s discount rate assumption for purposes of computing 2016 and 2015 “layers” for final capping, closure and post-closure obligations was 4.75% for both years, which reflects the Company’s long-term credit adjusted risk free rate as of the end of both 2015 and 2014. The Company’s inflation rate assumption is 2.5% for the years ending December 31, 2016 and 2015. The resulting final capping, closure and post-closure obligations are recorded on the condensed consolidated balance sheet along with an offsetting addition to site costs which is amortized to depletion expense as the remaining landfill airspace is consumed. Interest is accreted on the recorded liability using the corresponding discount rate. During the nine months ended September 30, 2016 and 2015, the Company expensed $5,740 and $2,756 respectively, or an average of $0.25 and $0.17 per ton consumed, respectively, related to final capping, closure and post-closure accretion expense. The following is a reconciliation of the Company’s final capping, closure and post-closure liability balance from December 31, 2015 to September 30, 2016:   Final capping, closure and post-closure liability at December 31, 2015 $ 78,613  Adjustments to final capping, closure and post-closure liabilities (6,914)  Liabilities incurred 7,271  Accretion expense associated with landfill obligations 5,740  Closure payments (2,235)  Assumption of closure liabilities from acquisitions 158,712  Final capping, closure and post-closure liability at September 30, 2016 $ 241,187  The Adjustments to final capping, closure and post-closure liabilities primarily consisted of increases in estimated airspace at some of the Company’s landfills at which expansions are being pursued, decreases in estimated annual tonnage consumptions at various landfills, decreases in estimated closure costs at some of the Company’s landfills and changes in engineering estimates of total site capacity. The Company performs its annual review of its cost and capacity estimates in the first quarter of each year. At September 30, 2016 and December 31, 2015, $55,452 and $43,636 of the Company’s restricted assets balance was for purposes of securing its performance of future final capping, closure and post-closure obligations. 

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2016
Acquisitions [Abstract]
Acquisitions	 6. ACQUISITIONS Progressive Waste Acquisition As described in Note 1, on June 1, 2016, pursuant to the Merger Agreement, Merger Sub merged with and into Old Waste Connections in an all-stock business combination with Old Waste Connections continuing as the surviving corporation and an indirect wholly-owned subsidiary of New Waste Connections. The term “Progressive Waste” is used herein in the context of references to Progressive Waste Solutions Ltd. and its shareholders prior to the completion of the Progressive Waste acquisition on June 1, 2016. The financial statements presented herein are the historical financial statements of Old Waste Connections with the inclusion on June 1, 2016 of the fair value of the identifiable assets and liabilities acquired from Progressive Waste and the inclusion of the results of operations from the acquired Progressive Waste operations commencing on June 1, 2016. Under the terms of the Merger Agreement, Old Waste Connections’ stockholders received 2.076843 New Waste Connections shares for each Old Waste Connections share they owned. Immediately following the completion of the Progressive Waste acquisition, New Waste Connections also completed (i) a consolidation whereby every 2.076843 common shares outstanding were converted into one common share (the “Consolidation”) and (ii) an amalgamation with a wholly-owned subsidiary whereby its legal name was changed from Progressive Waste Solutions Ltd. to Waste Connections, Inc. (the “Amalgamation”). Upon completion of the Progressive Waste acquisition, Old Waste Connections’ former stockholders owned approximately 70% of the Company, and Progressive Waste’s former shareholders owned approximately 30% . All share amounts stated herein reflect shares on a post-Consolidation basis. Following the completion of the Progressive Waste acquisition, the Consolidation and the Amalgamation, on June 1, 2016, the post-Consolidation common shares of New Waste Connections (the “Common Shares”) commenced trading on the Toronto Stock Exchange (the “TSX”) and on the NYSE under the ticker symbol “WCN.” The common stock of Old Waste Connections, which traded previously under the symbol “WCN,” ceased trading on, and has been delisted from, the NYSE. The transaction was accounted for as a reverse merger using the acquisition method of accounting. Old Waste Connections has been identified as the acquirer for accounting purposes and the acquisition method of accounting has been applied. Identifying the acquirer requires various considerations including the relative voting rights post-closing, the size of minority voting interests and the composition of the board of directors and senior management. Based on these considerations, Old Waste Connections’ former stockholders hold a majority of the post-closing voting rights of the combined company and both the post-closing composition of the board of directors and senior management are most closely aligned with Old Waste Connections. The Progressive Waste acquisition provided the Company with significant strategic and financial benefits including enhanced size and revenue diversification, increased earnings and cash flows and better access to capital markets. The results of operations from the acquired Progressive Waste operations have been included in the Company’s Condensed Consolidated Financial Statements from June 1, 2016, the acquisition date. Total revenues during the period from June 1, 2016 to September 30, 2016, generated from the operations acquired in the Progressive Waste acquisition and included within consolidated revenues, were $687,108 . Total pre-tax earnings during the period from June 1, 2016 to September 30, 2016, generated from the operations acquired in the Progressive Waste acquisition and included within consolidated income before income taxes, were $68,289 . The following table summarizes the consideration transferred to acquire Progressive Waste and the preliminary amounts of identifiable assets acquired and liabilities assumed:  Fair value of consideration transferred:  Shares issued $ 3,503,162  Debt assumed 1,729,274  5,232,436  Less: cash acquired (65,739)  Net fair value of consideration transferred 5,166,697   Recognized amounts of identifiable assets acquired and liabilities assumed associated with the business acquired:  Accounts receivable 231,449  Prepaid expenses and other current assets 29,348  Restricted assets 16,551  Property and equipment 2,100,015  Contracts 223,885  Customer lists 255,112  Other intangibles 218,499  Other assets 6,343  Accounts payable and accrued liabilities (267,153)  Deferred revenue (35,635)  Contingent consideration (15,902)  Other long-term liabilities (185,545)  Deferred income taxes (336,777)  Total identifiable net assets 2,240,190  Goodwill $ 2,926,507  During the three months ended September 30, 2016, the Company increased goodwill $ 64,590 , property and equipment $ 16,408 , contracts $ 13,473 , customer lists $ 19,609 and deferred income taxes $ 112,661 . Following the merger of Merger Sub into Old Waste Connections, and the issuance of 2.076843 New Waste Connections shares for each Old Waste Connections share as a result of the Consolidation, the Company issued an additional 52,145,919 common shares at $67.18 , the closing price on the NYSE of New Waste Connections common shares on June 1, 2016 as share consideration for the Progressive Waste acquisition. The Company assumed $1,729,274 of debt in the acquisition, consisting of $1,659,465 of amounts outstanding under the Progressive Waste credit facilities that were repaid in full following the close of the acquisition, $64,000 of tax-exempt bonds and $5,809 of other long-term debt. See Note 8 for further discussion of the debt assumed. Contingent consideration acquired consists primarily of two amounts payable to the former owners of an acquisition completed by Progressive Waste in 2015. The first contingent amount payable is based on the acquired operations exceeding earnings targets specified in the purchase agreement over a one -year period ending September 30, 2017. There is no limit to this contingent amount payable under the terms of the purchase agreement, the fair value of which was computed at $10,488 , based upon applying a discount rate of 2.0% to the probability assessment of the expected future cash flows over the period in which the obligation is expected to be settled. The second contingent amount payable has a maximum possible payment of $5,000 , representing a purchase price holdback payable to the former owners subject to the satisfaction of various business performance conditions through December 31, 2016. The goodwill acquired is primarily attributable to growth opportunities at operations acquired in the Progressive Waste acquisition and synergies that are expected to arise as a result of the acquisition. The expected tax deductible amount of the goodwill acquired is $303,594 . The fair value of acquired working capital related to Progressive Waste is provisional pending final resolution of information that existed at the acquisition date to support the fair value of the assets acquired and liabilities assumed. The fair value related to certain other assets and liabilities is provisional as well, based on information existing at the acquisition date, and is subject to change. Measurement period adjustments will be evaluated to determine whether they relate to facts and circumstances that existed at the acquisition date. Any measurement period adjustments recorded will be recognized in the reporting period in which they are identified. The gross amount of trade receivables due under contracts is $238,952 , of which $7,503 is expected to be uncollectible. The Company did not acquire any other class of receivable as a result of the Progressive Waste acquisition. The Company incurred $31,588 of acquisition-related costs for the Progressive Waste acquisition during the nine months ended September 30, 2016. These expenses are included in Selling, general and administrative expenses in the Company’s Condensed Consolidated Statements of Net Income. Other Acquisitions The Company acquired 10 individually immaterial non-hazardous solid waste collection businesses during the nine months ended September 30, 2016. The total acquisition-related costs incurred during the nine months ended September 30, 2016 for these acquisitions was $773 . These expenses are included in Selling, general and administrative expenses in the Company’s Condensed Consolidated Statements of Net Income. In January 2015, the Company acquired Shale Gas Services, LLC (“Shale Gas”), which owns two E&P waste stream treatment and recycling operations in Arkansas and Texas, for cash consideration of $41,000 and potential future contingent consideration. The contingent consideration would be paid to the former owners of Shale Gas based on the achievement of certain operating targets for the acquired operations, as specified in the membership purchase agreement, over a two -year period following the close of the acquisition. The Company used probability assessments of the expected future cash flows and determined that no liability for payment of future contingent consideration existed as of the acquisition close date. As of September 30, 2016, the assessment that no liability existed for payment of future contingent consideration has not changed. In March 2015, the Company acquired DNCS Properties, LLC (“DNCS”), which owns land and permits to construct and operate an E&P waste facility in the Permian Basin, for cash consideration of $30,000 and a long-term note issued to the former owners of DNCS with a fair value of $5,088 . The long-term note requires ten annual principal payments of $500 , followed by an additional ten annual principal payments of $250 , for total future cash payments of $7,500 . The fair value of the long-term note was determined by applying a discount rate of 4.75% to the payments over the 20 -year payment period. In addition to the acquisitions of Shale Gas and DNCS, the Company acquired 10 individually immaterial non-hazardous solid waste collection and disposal businesses during the nine months ended September 30, 2015. The total acquisition-related costs incurred during the nine months ended September 30, 2015 for these acquisitions was $ 1,372 . These expenses are included in Selling, general and administrative expenses in the Company’s Condensed Consolidated Statements of Net Income. The results of operations of these acquired businesses have been included in the Company’s Condensed Consolidated Financial Statements from their respective acquisition dates. The Company expects these acquired businesses to contribute towards the achievement of the Company’s strategy to expand through acquisitions. Goodwill acquired is attributable to the synergies and ancillary growth opportunities expected to arise after the Company’s acquisition of these businesses. The following table summarizes the consideration transferred to acquire these businesses and the preliminary amounts of identifiable assets acquired and liabilities assumed at the acquisition dates for these individually immaterial acquisitions consummated in the nine months ended September 30, 2016 and 2015:   2016 Acquisitions 2015 Acquisitions Fair value of consideration transferred:  Cash $ 13,703 $ 112,090  Notes issued to sellers - 6,091  13,703 118,181  Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:  Accounts receivable 521 6,434  Prepaid expenses and other current assets 477 392  Property and equipment 4,397 32,425  Long-term franchise agreements and contracts - 4,231  Customer lists 5,079 4,070  Permits - 34,998  Indefinite-lived intangibles - 1,257  Other intangibles - 2,073  Other assets 261 977  Accounts payable and accrued liabilities (744) (2,597)  Deferred revenue (659) (2,470)  Contingent consideration (345) (515)  Other long-term liabilities - (1,061)  Total identifiable net assets 8,987 80,214  Goodwill $ 4,716 $ 37,967   The acquisitions of 10 non-hazardous solid waste collection businesses resulted in goodwill acquired during the nine months ended September 30, 2016, totaling $4,716 , which is expected to be deductible for tax purposes. Goodwill acquired during the nine months ended September 30, 2015, totaling $37,967 , is expected to be deductible for tax purposes. The fair value of acquired working capital related to four individually immaterial acquisitions completed during the nine months ended September 30, 2016, is provisional pending receipt of information from the acquirees to support the fair value of the assets acquired and liabilities assumed. Any adjustments recorded relating to finalizing the working capital for these four acquisitions are not expected to be material to the Company’s financial position. The gross amount of trade receivables due under contracts acquired during the nine months ended September 30, 2016, is $947 , of which $426 is expected to be uncollectible. The gross amount of trade receivables due under contracts acquired during the nine months ended September 30, 2015, is $6,705 , of which $271 is expected to be uncollectible. The Company did not acquire any other class of receivable as a result of the acquisitions of these businesses. Pro Forma Results of Operations The following pro forma results of operations assume that the Company’s acquisition of Progressive Waste and its other acquisitions that were collectively insignificant, occurring during the nine months ended September 30, 2016 and 2015, were acquired as of January 1, 2015 (unaudited):   Nine Months Ended September 30,  2016 2015  Total revenue $ 3,136,249 $ 3,092,513  Net income 279,907 (81,256)  Basic income per share 1.60 (0.46)  Diluted income per share 1.60 (0.46)  The unaudited pro forma results of operations do not purport to be indicative of the results of operations which actually would have resulted had the acquisitions occurred on January 1, 2015, nor are they necessarily indicative of future operating results. The above unaudited pro forma financial information includes adjustments to acquisition expenses incurred by the Company and the acquired businesses, severance payments to employees terminated as a result of the acquisitions, equity-based compensation expenses incurred as a result of accelerated vesting resulting from the Progressive Waste acquisition, interest expense on new and refinanced debt attributable to the acquisitions, expenses incurred by Progressive Waste to terminate interest rate swaps resulting from its credit facility being terminated, depreciation expense on acquired property and equipment, amortization of identifiable intangible assets acquired, accretion of closure and post-closure interest expense on acquired landfills and provision for income taxes.

Goodwill and Intangible Assets,

Goodwill and Intangible Assets, Net	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets, Net [Abstract]
Goodwill and Intangible Assets, Net	7. GOODWILL AND INTANGIBLE ASSETS, NET The Company tests goodwill for impairment annually in the fourth quarter of the year and whenever events or changes in circumstances indicate the carrying value of goodwill and/or indefinite-lived intangible assets may not be recoverable. In the first step (“Step 1”) of testing for goodwill impairment, the Company estimates the fair value of each reporting unit, which consisted of five geographic operating segments and its E&P segment at September 30, 2016 and three geographic operating segments and its E&P segment at September 30, 2015, and compares the fair value with the carrying value of the net assets assigned to each reporting unit. If the fair value of a reporting unit is greater than the carrying value of the net assets, including goodwill, assigned to the reporting unit, then no impairment results. If the fair value is less than its carrying value, then the Company would perform a second step and determine the fair value of the goodwill. In this second step (“Step 2”), the fair value of goodwill is determined by deducting the fair value of a reporting unit’s identifiable assets and liabilities from the fair value of the reporting unit as a whole, as if that reporting unit had just been acquired and the purchase price were being initially allocated. If the fair value of the goodwill is less than its carrying value for a reporting unit, an impairment charge is recorded to Impairments and other operating charges in the Condensed Consolidated Statements of Net Income (Loss).  During the third quarter of 2015, the Company determined that sufficient indicators of potential impairment existed to require an interim goodwill and indefinite-lived intangible assets impairment analysis for its E&P segment as a result of the sustained decline in oil prices in the year-to-date 2015 period, together with market expectations of a likely slow recovery in such prices. The Company, therefore, performed an interim Step 1 assessment of its E&P segment during the third quarter of 2015. The Step 1 assessment involved measuring the recoverability of goodwill by comparing the E&P segment’s carrying amount, including goodwill, to the fair value of the reporting unit. The fair value was estimated using an income approach employing a discounted cash flow (“DCF”) model. The DCF model incorporated projected cash flows over a forecast period based on the remaining estimated lives of the operating locations comprising the E&P segment. This was based on a number of key assumptions, including, but not limited to, a discount rate of 11.6% , annual revenue projections based on E&P waste resulting from projected levels of oil and natural gas exploration and production activity during the forecast period, gross margins based on estimated operating expense requirements during the forecast period and estimated capital expenditures over the forecast period, all of which were classified as Level 3 in the fair value hierarchy. As a result of the Step 1 assessment, the Company determined that the E&P segment did not pass the Step 1 test because the carrying value exceeded the estimated fair value of the reporting unit. The Company then performed the Step 2 test to determine the fair value of goodwill for its E&P segment. Based on the Step 1 and Step 2 analyses, the Company recorded a goodwill impairment charge within its E&P segment of $411,786 during the three months ended September 30, 2015.  Prior to conducting the first step of the goodwill impairment test for the E&P segment, the Company first evaluated the recoverability of its long-lived assets, including finite-lived intangible assets. When indicators of impairment are present, the Company tests long-lived assets for recoverability by comparing the carrying value of an asset group to its undiscounted cash flows. The Company considered the sustained decline in oil prices in the year-to-date 2015 period, together with market expectations of a likely slow recovery in such prices, to be indicators of impairment for the E&P segment’s long-lived assets. Based on the result of the recoverability test, the Company determined that the carrying value of certain asset groups within the E&P segment exceeded their undiscounted cash flows and were therefore not recoverable. The Company then compared the fair value of these asset groups to their carrying values. The Company estimated the fair value of the asset groups under an income approach, as described above. Based on the analysis, the Company recorded an impairment charge to Impairments and other operating items in the Condensed Consolidated Statements of Net Income (Loss) on certain long-lived assets within its E&P segment of $63,928 during the three months ended September 30, 2015.  Additionally, the Company evaluated the recoverability of the E&P segment’s indefinite-lived intangible assets (other than goodwill) by comparing the estimated fair value of each indefinite-lived intangible asset to its carrying value. The Company estimated the fair value of the indefinite-lived intangible assets using an excess earnings approach. Based on the result of the recoverability test, the Company determined that the carrying value of certain indefinite-lived intangible assets within the E&P segment exceeded their fair value and were therefore not recoverable. The Company recorded an impairment charge to Impairments and other operating items in the Condensed Consolidated Statements of Net Income (Loss) on certain indefinite-lived intangible assets within its E&P segment of $38,300 during the three months ended September 30, 2015. Intangible assets, exclusive of goodwill, consisted of the following at September 30, 2016:   Gross Carrying Amount Accumulated Amortization Accumulated Impairment Loss Net Carrying Amount Finite-lived intangible assets:  Long-term franchise agreements and contracts $ 433,711 $ (77,025) $ - $ 356,686  Customer lists 433,780 (123,312) - 310,468  Permits and other 299,606 (18,844) - 280,762  1,167,097 (219,181) - 947,916  Indefinite-lived intangible assets:  Solid waste collection and transportation permits 152,761 - - 152,761  Material recycling facility permits 42,283 - - 42,283  E&P facility permits 59,855 - (38,507) 21,348  254,899 - (38,507) 216,392  Intangible assets, exclusive of goodwill $ 1,421,996 $ (219,181) $ (38,507) $ 1,164,308   The weighted-average amortization period of long-term franchise agreements and contracts acquired during the nine months ended September 30, 2016 was 15.5 years. The weighted-average amortization period of customer lists acquired during the nine months ended September 30, 2016 was 11.6 years. The weighted-average amortization period of finite-lived permits and other acquired during the nine months ended September 30, 2016 was 20.0 years. Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2015:   Gross Carrying Amount Accumulated Amortization Accumulated Impairment Loss Net Carrying Amount Finite-lived intangible assets:  Long-term franchise agreements and contracts $ 210,384 $ (60,205) $ - $ 150,179  Customer lists 173,855 (96,941) - 76,914  Permits and other 81,240 (13,587) - 67,653  465,479 (170,733) - 294,746 Indefinite-lived intangible assets:  Solid waste collection and transportation permits 152,761 - - 152,761  Material recycling facility permits 42,283 - - 42,283  E&P facility permits 59,855 - (38,351) 21,504  254,899 - (38,351) 216,548  Intangible assets, exclusive of goodwill $ 720,378 $ (170,733) $ (38,351) $ 511,294   Estimated future amortization expense for the next five years relating to finite-lived intangible assets is as follows:   For the year ending December 31, 2016 $ 76,035  For the year ending December 31, 2017 $ 105,045  For the year ending December 31, 2018 $ 98,556  For the year ending December 31, 2019 $ 88,582  For the year ending December 31, 2020 $ 80,115 

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2016
Long-Term Debt [Abstract]
Long-Term Debt	8. LONG-TERM DEBT Long-term debt consists of the following:   September 30, 2016 December 31, 2015  Revolver under Credit Agreement, bearing interest ranging from 2.08 % to 2.95 % (a) $ 357,947 $ -  Term loan under Credit Agreement, bearing interest at 1.72 % (a) 1,637,500 -  Revolver under prior credit agreement, bearing interest ranging from 1.44% to 3.70% (b) - 390,000  Term loan under prior credit agreement, bearing interest at 1.44% (b) - 800,000  2016 Notes, bearing interest at 3.30% - 100,000  2018 Notes, bearing interest at 4.00% 50,000 50,000  2019 Notes, bearing interest at 5.25 % 175,000 175,000  2021 Notes, bearing interest at 4.64% 100,000 100,000  New 2021 Notes, bearing interest at 2.39% 150,000 -  2022 Notes, bearing interest at 3.09% 125,000 125,000  2023 Notes, bearing interest at 2.75% 200,000 -  2025 Notes, bearing interest at 3.41% 375,000 375,000  2026 Notes, bearing interest at 3.03% 400,000 -  Tax-exempt bonds, bearing interest ranging from 0.84 % to 0.96 % (a) 95,430 31,430  Notes payable to sellers and other third parties, bearing interest at 3.00 % to 24.81 % (a) 14,439 10,855  3,680,316 2,157,285  Less – current portion (1,624) (2,127)  Less – debt issuance costs (16,721) (8,031)  $ 3,661,971 $ 2,147,127 ____________________ (a) Interest rates represent the interest rates incurred at September 30, 2016 . (b) Interest rates represent the interest rates incurred at December 31, 2015 .  Summary of Changes in Debt Related to Progressive Waste Acquisition On June 1, 2016, the Company assumed $1,729,274 of debt in the Progressive Waste acquisition consisting of $1,659,465 of amounts outstanding under Progressive Waste’s prior Amended and Restated Credit Agreement, dated as of June 30, 2015, among Progressive Waste, Bank of America, N.A., acting through its Canada branch, as global agent, Bank of America, N.A., as the U.S. agent, and the other lenders and financial institutions party thereto (the “2015 Progressive Waste Credit Agreement”), $64,000 of tax-exempt bonds and $5,809 of other long-term debt. On June 1, 2016, the Company terminated the 2015 Progressive Waste Credit Agreement. Also on June 1, 2016, Old Waste Connections terminated a Revolving Credit and Term Loan Agreement, dated as of January 26, 2015, by and among Old Waste Connections, Bank of America, N.A., as the administrative agent and swing line lender and letter of credit issuer, and certain lenders and other financial institutions party thereto (the “2015 Old Waste Connections Credit Agreement,” and together with the 2015 Progressive Waste Credit Agreement, the “Prior Credit Agreements”). On June 1, 2016, the Company also entered into several financing agreements, including a Revolving Credit and Term Loan Agreement (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, the “Credit Agreement”) with Bank of America, N.A., acting through its Canada Branch, as global agent, the swing line lender and letter of credit issuer, Bank of America, N.A., as the U.S. Agent and a letter of credit issuer, the lenders (the “Lenders”) and any other financial institutions from time to time party thereto, and a Master Note Purchase Agreement (as amended, restated, amended and restated, assumed, supplemented or modified from time to time, the “2016 NPA”) with certain accredited institutional investors, as more fully described below. Proceeds from the borrowings under the Credit Agreement were used initially to refinance indebtedness of the Company and its subsidiaries under the Prior Credit Agreements and for the payment of transaction fees and expenses related to the Progressive Waste acquisition. The Company used proceeds from the sale of the 2016 Senior Notes (defined below) to refinance existing indebtedness and for general corporate purposes. New Credit Agreement As described above, on June 1, 2016, the Company entered into the Credit Agreement, which has a scheduled maturity date of June 1, 2021. Details of the Credit Agreement at September 30, 2016 are as follows:   Revolver under Credit Agreement  Available $ 956,682  Letters of credit outstanding $ 247,871  Total amount drawn, as follows: $ 357,947  Amount drawn – Canadian prime rate loan $ 11,436  Interest rate applicable - Canadian prime rate loan 2.95%  Amount drawn – Canadian BA loan $ 346,511  Interest rate applicable – Canadian BA loan 2.08%  Commitment – rate applicable 0.15%  Term loan under Credit Agreement  Amount drawn – U.S. based LIBOR loan $ 1,637,500  Interest rate applicable – U.S. based LIBOR loan 1.72%  Pursuant to the terms and conditions of the Credit Agreement, the Lenders have committed to provide a $3,200,000 credit facility to the Company, consisting of (i) revolving advances up to an aggregate principal amount of $1,562,500 at any one time outstanding, and (ii) a term loan in an aggregate principal amount of $1,637,500 , which term loan was fully drawn at closing. As part of the aggregate commitments under the revolving advances, the Credit Agreement provides for letters of credit to be issued at the request of the Company in an aggregate amount not to exceed $500,000 and for swing line loans to be issued at the request of the Company in an aggregate amount not to exceed the lesser of $75,000 and the aggregate commitments under the revolving advances. This swing line sublimit is part of, and not in addition to, the aggregate commitments under the revolving advances. In addition, certain existing letters of credit in place under the Prior Credit Agreements are continued and now deemed issued under and governed by the terms of the Credit Agreement. Subject to certain specified conditions and additional deliveries, the Company has the option to request increases in the aggregate commitments for revolving advances and one or more additional term loans, provided that (i) the aggregate principal amount of such requests does not exceed $500,000 and (ii) the aggregate principal amount of commitments and term loans under the credit facility does not exceed $3,700,000 . The Company has $6,913 of debt issuance costs related to the Credit Agreement recorded in Other assets, net in the Condensed Consolidated Balance Sheets at September 30, 2016, which are being amortized through the maturity date, or June 1, 2021 . Advances are available under the Credit Agreement in U.S. dollars and Canadian dollars. Interest accrues on the term loan at a LIBOR rate or a base rate, at the Company’s option, plus an applicable margin. Interest accrues on revolving advances, at the Company’s option, (i) at a LIBOR rate or a base rate for U.S. dollar borrowings, plus an applicable margin, and (ii) at the Canadian prime rate for Canadian dollar borrowings, plus an applicable margin. Canadian dollar borrowings are also available by way of bankers' acceptances or BA equivalent loans (“BA loans”), subject to the payment of a drawing fee. The fees for letters of credit in US dollars and Canadian dollars are also based on the applicable margin. The applicable margin used in connection with interest rates and fees is based on the Company’s leverage ratio. The applicable margin for LIBOR rate loans, drawing fees for bankers' acceptance and BA loans and letter of credit fees ranges from 1.00% to 1.50% , and the applicable margin for base rate loans, Canadian prime rate loans and swing line loans ranges from 0.00% to 0.50% . The Company will also pay a fee based on its leverage ratio on the actual daily unused amount of the aggregate revolving commitments. The borrowings under the Credit Agreement are unsecured. Proceeds from the borrowings under the Credit Agreement may be used on a go forward basis (i) to finance acquisitions permitted under the Credit Agreement, and (ii) for capital expenditures, working capital, letters of credit, and general corporate purposes. The Credit Agreement contains customary representations, warranties, covenants and events of default, including, among others, a change of control event of default and limitations on the incurrence of indebtedness and liens, new lines of business, mergers, transactions with affiliates and burdensome agreements. The Credit Agreement includes a financial covenant limiting, as of the last day of each fiscal quarter, the ratio of (a) (i) Consolidated Total Funded Debt (as defined in the Credit Agreement) as of such date less (ii) the sum of cash and cash equivalents of the Company and its subsidiaries on a dollar-for-dollar basis as of such date in excess of $50,000 up to a maximum of $200,000 (such that the maximum amount of reduction pursuant to this calculation does not exceed $150,000 ) to (b) Consolidated EBITDA (as defined in the Credit Agreement), measured for the preceding 12 months, to not more than 3.50 to 1.00 (or 3.75 to 1.00 during material acquisition periods, subject to certain limitations). The Credit Agreement also includes a financial covenant requiring the ratio of Consolidated EBIT (as defined in the Credit Agreement) to Consolidated Total Interest Expense (as defined in the Credit Agreement), in each case, measured for the preceding 12 months, to be not less than 2.75 to 1.00. During the continuance of an event of default, the Lenders may take a number of actions, including, among others, declaring the entire amount then outstanding under the Credit Agreement to be due and payable. As of September 30, 2016, the Company was in compliance with all applicable covenants in the Credit Agreement . 2015 Old Waste Connections Credit Agreement The 2015 Old Waste Connections Credit Agreement provided revolving advances up to an aggregate principal amount of $1,200,000 at any one time outstanding (the “revolver”), a term loan in an aggregate principal amount of $800,000 (the “term loan”) and letters of credit to be issued at the request of Old Waste Connections in an aggregate amount not to exceed $250,000 . As of December 31, 2015, $800,000 under the term loan and $390,000 under the revolver were outstanding under the 2015 Old Waste Connections Credit Agreement, exclusive of outstanding standby letters of credit of $78,373 . As of December 31, 2015, Old Waste Connections was in compliance with all applicable covenants in the 2015 Old Waste Connections Credit Agreement . Interest accrued on advances on the revolver, at Old Waste Connections’ option, at a LIBOR rate plus the applicable LIBOR margin (for a total rate of 1.44% at December 31, 2015) on LIBOR loans or a base rate plus an applicable margin (for a total rate of 3.70% at December 31, 2015) on base rate and swing line loans for each interest period. The issuing fees for all letters of credit were also based on an applicable margin. The applicable margin used in connection with interest rates and fees was based on Old Waste Connections’ consolidated leverage ratio. The applicable margin for LIBOR rate loans and letter of credit fees was 1.20% at December 31, 2015 and the applicable margin for base rate loans and swing line loans was 0.50% at December 31, 2015. As of December 31, 2015, $385,000 of the borrowings outstanding under the revolver were in LIBOR loans and $5,000 of the borrowings outstanding under the revolver were in swing line loans. Outstanding amounts on the term loan could be either base rate loans or LIBOR loans. At December 31, 2015, all amounts outstanding under the term loan were in LIBOR loans which bore interest at the LIBOR rate plus the applicable LIBOR margin (for a total rate of 1.44% at December 31, 2015). The applicable margin was based on Old Waste Connections’ consolidated leverage ratio. The applicable margin for LIBOR rate loans was 1.20% at December 31, 2015. Old Waste Connections paid a fee based on its consolidated leverage ratio on the actual daily unused amount of the aggregate revolving commitments ( 0.15% as of December 31, 2015). 2016 Master Note Purchase Agreement As described above, on June 1, 2016, the Company entered into the 2016 NPA pursuant to which the Company issued and sold to the investors $750,000 aggregate principal amount of senior unsecured notes consisting of (i) $150,000 of 2.39% series 2016 senior notes, tranche A due June 1, 2021 (the “New 2021 Notes”), (ii) $200,000 of 2.75% series 2016 senior notes, tranche B due June 1, 2023 (the “2023 Notes”) and (iii) $400,000 of 3.03% series 2016 senior notes, tranche C due June 1, 2026 (the “2026 Notes”) (collectively, the “2016 Senior Notes”) in a private placement. The 2016 Senior Notes bear interest at fixed rates with interest payable in arrears semi-annually on the first day of June and December, commencing on December 1, 2016, and on the respective maturity dates, until the principal thereunder becomes due and payable. The Company is amortizing the $5,319 of debt issuance costs through the maturity dates of the respective notes. Under the terms and conditions of the 2016 NPA, the Company is authorized to issue and sell notes in the aggregate principal amount of $1,500,000 , inclusive of the outstanding $750,000 aggregate principal amount of 2016 Senior Notes issued and sold by the Company on June 1, 2016, provided that the purchasers of the 2016 Senior Notes shall not have any obligation to purchase any additional notes issued pursuant to the 2016 NPA. The 2016 Senior Notes are unsecured obligations and rank pari passu with obligations under the Credit Agreement and the 2008 Notes (defined below). Certain subsidiaries of the Company have executed a subsidiary guaranty in relation to the Company’s obligations under the 2016 NPA. The 2016 Senior Notes are subject to representations, warranties, covenants and events of default customary for a private placement of senior unsecured notes. Upon the occurrence of an event of default, payment of the 2016 Senior Notes may be accelerated by the holders of the 2016 Senior Notes. The 2016 Senior Notes may also be prepaid by the Company at any time at par plus a make whole amount determined by the amount of the excess, if any, to the discounted value of the remaining scheduled payments with respect to the called principal of such 2016 Senior Notes minus the amount of such called principal, provided that the make whole shall in no event be less than zero. The discounted value is determined using market-based discount rates. In addition, the Company will be required to offer to prepay the 2016 Senior Notes upon certain changes in control. The 2016 NPA also contemplates certain offers of prepayments for specified tax reasons or certain noteholder sanctions events. As of September 30, 2016, the Company was in compliance with all applicable covenants in the 2016 NPA . 2008 Master Note Purchase Agreement On June 1, 2016, prior to the closing of the Progressive Waste acquisition, Old Waste Connections, certain subsidiaries of Old Waste Connections (together with Old Waste Connections, the “Obligors”) and certain holders of the 2008 Notes (defined below) entered into that certain Amendment No. 6 (the “Sixth Amendment”) to that certain Master Note Purchase Agreement, dated July 15, 2008 (the “2008 NPA”), as amended by Amendment No. 1 to the 2008 NPA dated as of July 20, 2009 (the “First Amendment”), as supplemented by First Supplement to the 2008 NPA dated as of October 26, 2009 (the “First Supplement”), as amended by Amendment No. 2 to the 2008 NPA dated as of November 24, 2010 (the “Second Amendment”), as supplemented by Second Supplement to the 2008 NPA dated as of April 1, 2011 (the “Second Supplement”), as amended by Amendment No. 3 to the 2008 NPA dated as of October 12, 2011 (the “Third Amendment”), as amended by Amendment No. 4 to the 2008 NPA dated as of August 9, 2013 (the “Fourth Amendment”), as amended by Amendment No. 5 to the 2008 NPA dated as of February 20, 2015 (the “Fifth Amendment”), and as supplemented by Third Supplement to the 2008 NPA dated as of June 11, 2015 (the “Third Supplement”) (the 2008 NPA, as so amended, restated, amended and restated, supplemented or otherwise modified from time to time prior to June 1, 2016, the “Amended 2008 NPA”). The Sixth Amendment, among other things, provides certain amendments to the Amended 2008 NPA to facilitate (i) the Progressive Waste acquisition and related transactions contemplated thereunder, (ii) the Company’s assumption of the Obligors’ obligations under the Assumed 2008 NPA (defined below) pursuant to the Assumption Agreement (defined below) upon the consummation of the Progressive Waste acquisition, (iii) the release of and/or reconstitution of obligations as a guaranty for certain Obligors, and (iv) additional amendments to the Amended 2008 NPA (beyond those in the Sixth Amendment) which were effective upon the Company’s assumption of the Obligor’s obligations under the Assumed 2008 NPA pursuant to the Assumption Agreement. On June 1, 2016, following the closing of the Progressive Waste acquisition, the Company entered into that certain Assumption and Exchange Agreement (as amended, restated, amended and restated, supplemented or modified from time to time, the “Assumption Agreement”) with Old Waste Connections, to and in favor of the holders of the notes issued from time to time under the Amended 2008 NPA as further amended by the Sixth Amendment (the Amended 2008 NPA as amended by the Sixth Amendment and as further modified by the Assumption Agreement, the “Assumed 2008 NPA”). Pursuant to the terms and conditions of the Assumed 2008 NPA, the Company has $825,000 of outstanding senior unsecured notes (the “2008 Notes”) at September 30, 2016 consisting of (i) $175,000 of 5.25% senior notes due 2019 (the “2019 Notes”), (ii) $50,000 of 4.00% senior notes due 2018 (the “2018 Notes”), (iii) $100,000 of 4.64% senior notes due 2021 (the “2021 Notes”), (iv) $ 125,000 of 3.09% senior notes due 2022 (the “2022 Notes”) and (v) $375,000 of 3.41% senior notes due 2025 (the “2025 Notes”), in each case, that were sold previously in a private placement. Under the terms and conditions of the Assumed 2008 NPA, the Company is authorized to issue and sell notes in the aggregate principal amount of $1,250,000 , inclusive of the outstanding $825,000 aggregate principal amount of 2008 Notes assumed by the Company on June 1, 2016, provided that the purchasers of the 2008 Notes shall not have any obligation to purchase any additional notes issued pursuant to the Assumed 2008 NPA. The 2008 Notes are unsecured obligations and rank pari passu with obligations under the Credit Agreement and the 2016 Senior Notes. Certain subsidiaries of the Company have executed a subsidiary guaranty in relation to the Company’s obligations under the Assumed 2008 NPA. The subsidiaries executing a guaranty in relation to the Assumed 2008 NPA are the same set of subsidiaries that executed a guaranty in relation to the 2016 NPA and the same set of subsidiaries that are guarantors under the Credit Agreement. The 2008 Notes are subject to representations, warranties, covenants and events of default customary for a private placement of senior unsecured notes. Upon the occurrence of an event of default, payment of the 2008 Notes may be accelerated by the holders of the 2008 Notes. The 2008 Notes may also be prepaid by the Company at any time at par plus a make whole amount determined in respect of the remaining scheduled payments on the 2008 Notes, using a market-based discount rate. In addition, the Company will be required to offer to prepay the 2008 Notes upon certain changes in control; however, no such prepayment offer was accepted in connection with the Progressive Waste acquisition. The Assumed 2008 NPA also contemplates certain offers of prepayments for specified tax reasons or certain noteholder sanctions events. As of September 30, 2016, the Company was in compliance with all applicable covenants in the 2008 NPA . 2016 Notes Old Waste Connections fully redeemed the 2016 Notes on April 1, 2016, using borrowings under the 2015 Old Waste Connections Credit Agreement.  

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Segment Reporting	9. SEGMENT REPORTING The Company’s revenues are generated from the collection, transfer, recycling and disposal of non-hazardous solid waste and the treatment, recovery and disposal of non-hazardous E&P waste. No single contract or customer accounted for more than 10% of the Company’s total revenues at the consolidated or reportable segment level during the periods presented. The Company manages its operations through five geographic operating segments and its E&P segment , which includes the majority of the Company’s E&P waste treatment and disposal operations. The Company’s five geographic operating segments and its E&P segment comprise the Company’s reportable segments. Each operating segment is responsible for managing several vertically integrated operations, which are comprised of districts. In June 2016, as a result of the Progressive Waste acquisition, described in Note 6, the Company formed two new geographic operating segments, Canada and Southern, and realigned its reporting structure at its existing Central and Eastern segments. The Company’s segment realignment consisted of the transfer of certain operations in Texas and Louisiana from its Central segment to its Southern segment and the transfer of certain operations in Tennessee, Mississippi and Alabama from its Eastern segment to its Southern segment. The Progressive Waste acquisition did not impact the Company’s Western or E&P segments. The segment information presented herein reflects the realignment of these districts. Under the current orientation, the Company’s Southern segment services customers located in Alabama, Arkansas, Florida, Louisiana, Mississippi, southern Oklahoma, western Tennessee and Texas; the Company’s Western segment services customers located in Alaska, California, Idaho, Montana, Nevada, Oregon, Washington and western Wyoming; the Company’s Eastern segment services customers located in Illinois, Iowa, Kentucky, Maryland, Massachusetts, Michigan, New Jersey, New York, North Carolina, Pennsylvania, South Carolina, eastern Tennessee, Vermont, Virginia, Wisconsin and the District of Columbia; the Company’s Canada segment services customers located in the provinces of Alberta, British Columbia, Manitoba, Ontario, Québec and Saskatchewan; and the Company’s Central segment services customers located in Arizona, Colorado, Kansas, Minnesota, Missouri, Nebraska, New Mexico, Oklahoma, South Dakota, western Texas, Utah and eastern Wyoming. The E&P segment services E&P customers located in Arkansas, Louisiana, New Mexico, North Dakota, Oklahoma, Texas, Wyoming and along the Gulf of Mexico. The Company’s Chief Operating Decision Maker (“CODM”) evaluates operating segment profitability and determines resource allocations based on several factors, of which the primary financial measure is segment EBITDA. The Company defines segment EBITDA as earnings before interest, taxes, depreciation, amortization, impairments and other operating items, other income (expense) and foreign currency transaction gain (loss). Segment EBITDA is not a measure of operating income, operating performance or liquidity under GAAP and may not be comparable to similarly titled measures reported by other companies. The Company’s management uses segment EBITDA in the evaluation of segment operating performance as it is a profit measure that is generally within the control of the operating segments. A reconciliation of segment EBITDA to Income before income tax provision is included at the end of this Note 9. Summarized financial information concerning the Company’s reportable segments for the three and nine months ended September 30, 2016 and 2015, is shown in the following tables:  Three Months Ended September 30, 2016 Revenue Intercompany Revenue (b) Reported Revenue Segment EBITDA (c)  Southern $ 317,727 $ (37,818) $ 279,909 $ 62,189  Western 276,941 (30,050) 246,891 84,214  Eastern 229,525 (34,719) 194,806 59,019  Canada 204,158 (26,413) 177,745 64,915  Central 176,109 (20,842) 155,267 58,079  E&P 33,785 (3,481) 30,304 8,919  Corporate (a) - - - (18,299)  $ 1,238,245 $ (153,323) $ 1,084,922 $ 319,036   Three Months Ended September 30, 2015 Revenue Intercompany Revenue (b) Reported Revenue Segment EBITDA (c)  Southern $ 43,442 $ (5,954) $ 37,488 $ 9,730  Western 257,480 (27,026) 230,454 76,279  Eastern 113,150 (19,157) 93,993 30,641  Central 150,211 (16,101) 134,110 50,564  E&P 54,901 (3,008) 51,893 17,541  Corporate (a) - - - 2,474  $ 619,184 $ (71,246) $ 547,938 $ 187,229   Nine Months Ended September 30, 2016 Revenue Intercompany Revenue (b) Reported Revenue Segment EBITDA (c)  Southern $ 497,863 $ (60,485) $ 437,378 $ 98,906  Western 789,716 (87,160) 702,556 237,839  Eastern 526,565 (81,379) 445,186 138,456  Canada 274,260 (35,931) 238,329 88,471  Central 468,004 (53,130) 414,874 154,510  E&P 97,883 (8,965) 88,918 21,953  Corporate (a) - - - (102,653)  $ 2,654,291 $ (327,050) $ 2,327,241 $ 637,482   Nine Months Ended September 30, 2015 Revenue Intercompany Revenue (b) Reported Revenue Segment EBITDA (c)  Southern $ 125,597 $ (17,614) $ 107,983 $ 26,715  Western 734,729 (76,261) 658,468 218,185  Eastern 325,788 (54,488) 271,300 87,134  Central 419,875 (44,342) 375,533 138,779  E&P 181,530 (9,464) 172,066 55,003  Corporate (a) - - - 4,856  $ 1,787,519 $ (202,169) $ 1,585,350 $ 530,672 ____________________ (a) Corporate functions include accounting, legal, tax, treasury, information technology, risk management, human resources, training and other administrative functions. Amounts reflected are net of allocations to the six operating segments. For the three and nine months ended September 30, 2016, amounts also include costs associated with the Progressive Waste acquisition. (b) Intercompany revenues reflect each segment’s total intercompany sales, including intercompany sales within a segment and between segments. Transactions within and between segments are generally made on a basis intended to reflect the market value of the service. (c) For those items included in the determination of segment EBITDA, the accounting policies of the segments are the same as those described in Old Waste Connections’ most recent Annual Report on Form 10-K, with the exception of foreign currency transaction gains (losses) for which the accounting policy is described in Note 2 in these Condensed Consolidated Financial Statements.  Total assets for each of the Company’s reportable segments at September 30, 2016 and December 31, 2015, were as follows:    September 30, 2016 December 31, 2015  Southern $ 2,867,903 $ 259,046  Western 1,504,750 1,498,296  Eastern 1,542,612 1,062,761  Canada 2,618,008 -  Central 1,296,360 1,070,505  E&P 1,072,818 1,115,234  Corporate 285,242 115,956  Total Assets $ 11,187,693 $ 5,121,798  The following tables show changes in goodwill during the nine months ended September 30, 2016 and 2015, by reportable segment:      Southern Western Eastern Canada Central E&P Total  Balance as of December 31, 2015 $ - $ 373,820 $ 499,237 $ - $ 472,425 $ 77,343 $ 1,422,825  Goodwill transferred (a) 95,710 - (39,705) - (56,005) - -  Goodwill acquired 1,338,806 2,696 75,769 1,465,720 48,232 - 2,931,223  Impact of changes in foreign currency - - - (2,878) - - (2,878)  Balance as of September 30, 2016 $ 1,434,516 $ 376,516 $ 535,301 $ 1,462,842 $ 464,652 $ 77,343 $ 4,351,170         Southern Western Eastern Central E&P Total  Balance as of December 31, 2014 $ - $ 372,915 $ 392,423 $ 460,381 $ 468,070 $ 1,693,789  Goodwill transferred (a) 92,510 - (55,206) (37,304) - -  Goodwill acquired 3,341 870 6,855 5,842 21,059 37,967  Impairment loss - - - - (411,786) (411,786)  Balance as of September 30, 2015 $ 95,851 $ 373,785 $ 344,072 $ 428,919 $ 77,343 $ 1,319,970 ____________________ (a) In June 2016, as a result of the Progressive Waste acquisition, described in Note 6, the Company realigned its reporting structure and changed its three geographic operating segments (Western, Central and Eastern) to five geographic operating segments (Southern, Western, Eastern, Canada and Central). Additionally, the Company realigned certain of the Company’s districts between operating segments. This realignment resulted in the reallocation of goodwill among its segments, which is reflected in the “Goodwill transferred” line item. A reconciliation of the Company’s primary measure of segment profitability (segment EBITDA) to Income before income tax provision in the Condensed Consolidated Statements of Net Income is as follows:   Three months ended September 30, Nine months ended September 30,  2016 2015 2016 2015  Southern segment EBITDA $ 62,189 $ 9,730 $ 98,906 $ 26,715  Western segment EBITDA 84,214 76,279 237,839 218,185  Eastern segment EBITDA 59,019 30,641 138,456 87,134  Canada segment EBITDA 64,915 - 88,471 -  Central segment EBITDA 58,079 50,564 154,510 138,779  E&P segment EBITDA 8,919 17,541 21,953 55,003  Subtotal reportable segments 337,335 184,755 740,135 525,816  Unallocated corporate overhead (18,299) 2,474 (102,653) 4,856  Depreciation (125,744) (61,373) (270,988) (178,318)  Amortization of intangibles (26,944) (7,195) (48,719) (21,458)  Impairments and other operating items (7,682) (493,813) (4,634) (494,158)  Interest expense (27,621) (16,367) (65,291) (47,386)  Other income (expense), net 671 (1,303) 179 (1,430)  Foreign currency transaction gain (loss) (350) - 339 -  Income (loss) before income tax provision $ 131,366 $ (392,822) $ 248,368 $ (212,078)  Unallocated corporate overhead for the nine months ended September 30, 2016, includes $31,588 of direct acquisition costs associated with the Progressive Waste acquisition, $24,245 of severance-related expenses payable to personnel of Progressive Waste, $ 5,300 synergy bonus to certain executive officers and key employees, $14,466 from the Company paying excise taxes levied on the unvested or vested and undistributed equity-compensation holdings of the Company’s corporate officers and members of its Board of Directors resulting from the Progressive Waste acquisition and $17,806 of equity-based compensation expenses associated with Progressive Waste’s equity-based compensation plans assumed by the Company. The following tables reflect a breakdown of the Company’s revenue and inter-company eliminations for the periods indicated:   Three months ended September 30, 2016  Revenue Intercompany Revenue Reported Revenue % of Reported Revenue  Solid waste collection $ 760,281 $ (2,472) $ 757,809 69.9%  Solid waste disposal and transfer 377,998 (144,459) 233,539 21.5  Solid waste recycling 32,138 (2,523) 29,615 2.7  E&P waste treatment, recovery and disposal 33,673 (3,608) 30,065 2.8  Intermodal and other 34,155 (261) 33,894 3.1  Total $ 1,238,245 $ (153,323) $ 1,084,922 100.0%    Three months ended September 30, 2015  Revenue Intercompany Revenue Reported Revenue % of Reported Revenue  Solid waste collection $ 354,490 $ (1,250) $ 353,240 64.5%  Solid waste disposal and transfer 180,442 (66,322) 114,120 20.8  Solid waste recycling 12,213 (155) 12,058 2.2  E&P waste treatment, recovery and disposal 54,695 (3,519) 51,176 9.3  Intermodal and other 17,344 - 17,344 3.2  Total $ 619,184 $ (71,246) $ 547,938 100.0%    Nine months ended September 30, 2016  Revenue Intercompany Revenue Reported Revenue % of Reported Revenue  Solid waste collection $ 1,619,827 $ (5,571) $ 1,614,256 69.4%  Solid waste disposal and transfer 804,928 (307,308) 497,620 21.4  Solid waste recycling 60,876 (4,554) 56,322 2.4  E&P waste treatment, recovery and disposal 97,259 (9,228) 88,031 3.8  Intermodal and other 71,401 (389) 71,012 3.0  Total $ 2,654,291 $ (327,050) $ 2,327,241 100.0%    Nine months ended September 30, 2015  Revenue Intercompany Revenue Reported Revenue % of Reported Revenue  Solid waste collection $ 1,024,078 $ (3,150) $ 1,020,928 64.4%  Solid waste disposal and transfer 494,804 (187,486) 307,318 19.4  Solid waste recycling 35,614 (654) 34,960 2.2  E&P waste treatment, recovery and disposal 183,103 (10,879) 172,224 10.9  Intermodal and other 49,920 - 49,920 3.1  Total $ 1,787,519 $ (202,169) $ 1,585,350 100.0% 

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2016
Derivative Financial Instruments [Abstract]
Derivative Financial Instruments	10. DERIVATIVE FINANCIAL INSTRUMENTS The Company recognizes all derivatives on the Condensed Consolidated Balance Sheet at fair value. All of the Company’s derivatives have been designated as cash flow hedges; therefore, the effective portion of the changes in the fair value of derivatives will be recognized in accumulated other comprehensive loss (“AOCL”) until the hedged item is recognized in earnings. The ineffective portion of the changes in the fair value of derivatives will be immediately recognized in earnings. The Company classifies cash inflows and outflows from derivatives within operating activities on the Condensed Consolidated Statements of Cash Flows. One of the Company’s objectives for utilizing derivative instruments is to reduce its exposure to fluctuations in cash flows due to changes in the variable interest rates of certain borrowings issued under its Credit Agreement. The Company’s strategy to achieve that objective involves entering into interest rate swaps. The interest rate swaps outstanding at September 30, 2016 were specifically designated to the Credit Agreement and accounted for as cash flow hedges. At September 30, 2016, the Company’s derivative instruments included 12 interest rate swap agreements as follows:   Date Entered Notional Amount Fixed Interest Rate Paid* Variable Interest Rate Received Effective Date Expiration Date  December 2011 $ 175,000 1.600% 1-month LIBOR February 2014 February 2017  April 2014 $ 100,000 1.800% 1-month LIBOR July 2014 July 2019  May 2014 $ 50,000 2.344% 1-month LIBOR October 2015 October 2020  May 2014 $ 25,000 2.326% 1-month LIBOR October 2015 October 2020  May 2014 $ 50,000 2.350% 1-month LIBOR October 2015 October 2020  May 2014 $ 50,000 2.350% 1-month LIBOR October 2015 October 2020  April 2016 $ 100,000 1.000% 1-month LIBOR February 2017 February 2020  June 2016 $ 75,000 0.850% 1-month LIBOR February 2017 February 2020  June 2016 $ 150,000 0.950% 1-month LIBOR January 2018 January 2021  June 2016 $ 150,000 0.950% 1-month LIBOR January 2018 January 2021  July 2016 $ 50,000 0.900% 1-month LIBOR January 2018 January 2021  July 2016 $ 50,000 0.890% 1-month LIBOR January 2018 January 2021 ____________________ * Plus applicable margin. Another of the Company’s objectives for utilizing derivative instruments is to reduce its exposure to fluctuations in cash flows due to changes in the price of diesel fuel. The Company’s strategy to achieve that objective involves periodically entering into fuel hedges that are specifically designated to certain forecasted diesel fuel purchases and accounted for as cash flow hedges. At September 30, 2016, the Company’s derivative instruments included four fuel hedge agreements as follows:  Date Entered Notional Amount (in gallons per month) Diesel Rate Paid Fixed (per gallon) Diesel Rate Received Variable Effective Date Expiration Date  May 2015 300,000 $3.2800 DOE Diesel Fuel Index* January 2016 December 2017  May 2015 200,000 $3.2750 DOE Diesel Fuel Index* January 2016 December 2017  July 2016 500,000 $2.4988 DOE Diesel Fuel Index* January 2017 December 2017  July 2016 1,000,000 $2.6345 DOE Diesel Fuel Index* January 2018 December 2018 ____________________ * If the national U.S. on-highway average price for a gallon of diesel fuel (“average price”), as published by the U.S. Department of Energy (“DOE”), exceeds the contract price per gallon, the Company receives the difference between the average price and the contract price (multiplied by the notional number of gallons) from the counterparty. If the average price is less than the contract price per gallon, the Company pays the difference to the counterparty.  The fair values of derivative instruments designated as cash flow hedges as of September 30, 2016, were as follows:   Derivatives Designated as Cash Asset Derivatives Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value  Interest rate swaps $ - Accrued liabilities (a) $ (4,636)  Other long-term liabilities (7,009)   Fuel hedges Other assets, net 12 Accrued liabilities (b) (3,953)  Total derivatives designated as cash flow hedges $ 12 $ (15,598) ____________________ (a) Represents the estimated amount of the existing unrealized losses on interest rate swaps as of September 30, 2016 (based on the interest rate yield curve at that date), included in AOCL expected to be reclassified into pre-tax earnings within the next 12 months. The actual amounts reclassified into earnings are dependent on future movements in interest rates. (b) Represents the estimated amount of the existing unrealized losses on fuel hedges as of September 30, 2016 (based on the forward DOE diesel fuel index curve at that date), included in AOCL expected to be reclassified into pre-tax earnings within the next 12 months. The actual amounts reclassified into earnings are dependent on future movements in diesel fuel prices.  The fair values of derivative instruments designated as cash flow hedges as of December 31, 2015, were as follows:  Derivatives Designated as Cash Asset Derivatives Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value  Interest rate swaps $ - Accrued liabilities $ (5,425)  Other long-term liabilities (4,320)   Fuel hedges - Accrued liabilities (5,699)  Other long-term liabilities (4,201)  Total derivatives designated as cash flow hedges $ - $ (19,645)   The following table summarizes the impact of the Company’s cash flow hedges on the results of operations, comprehensive income (loss) and AOCL for the three and nine months ended September 30, 2016 and 2015:  Derivatives Designated as Cash Flow Hedges Amount of Gain or (Loss) Recognized as AOCL on Derivatives, Net of Tax (Effective Portion) (a) Statement of Net Income Classification Amount of (Gain) or Loss Reclassified from AOCL into Earnings, Net of Tax (Effective Portion) (b),(c)  Three Months Ended September 30, Three Months Ended September 30,  2016 2015 2016 2015  Interest rate swaps $ 2,598 $ (3,786) Interest expense $ 1,234 $ 645  Fuel hedges 630 (3,039) Cost of operations 830 541  Total $ 3,228 $ (6,825) $ 2,064 $ 1,186   Derivatives Designated as Cash Flow Hedges Amount of Gain or (Loss) Recognized as AOCL on Derivatives, Net of Tax (Effective Portion) (a) Statement of Net Income Classification Amount of (Gain) or Loss Reclassified from AOCL into Earnings, Net of Tax (Effective Portion) (b),(c)  Nine Months Ended September 30, Nine Months Ended September 30,  2016 2015 2016 2015  Interest rate swaps $ (3,896) $ (6,528) Interest expense $ 3,338 $ 1,929  Fuel hedges 841 (4,385) Cost of operations 2,855 1,341  Total $ (3,055) $ (10,913) $ 6,193 $ 3,270 ___________________ (a) In accordance with the derivatives and hedging guidance, the effective portions of the changes in fair values of interest rate swaps and fuel hedges have been recorded in equity as a component of AOCL. As the critical terms of the interest rate swaps match the underlying debt being hedged, no ineffectiveness is recognized on these swaps and, therefore, all unrealized changes in fair value are recorded in AOCL. Because changes in the actual price of diesel fuel and changes in the DOE index price do not offset exactly each reporting period, the Company assesses whether the fuel hedges are highly effective using the cumulative dollar offset approach. (b) Amounts reclassified from AOCL into earnings related to realized gains and losses on interest rate swaps are recognized when interest payments or receipts occur related to the swap contracts, which correspond to when interest payments are made on the Company’s hedged debt. (c) Amounts reclassified from AOCL into earnings related to realized gains and losses on the fuel hedges are recognized when settlement payments or receipts occur related to the hedge contracts, which correspond to when the underlying fuel is consumed. The Company measures and records ineffectiveness on the fuel hedges in Cost of operations in the Condensed Consolidated Statements of Net Income on a monthly basis based on the difference between the DOE index price and the actual price of diesel fuel purchased, multiplied by the notional number of gallons on the contracts. There was no significant ineffectiveness recognized on the fuel hedges during the nine months ended September 30, 2016 and 2015. See Note 14 for further discussion on the impact of the Company’s hedge accounting to its consolidated comprehensive income (loss) and AOCL. 

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2016
Fair Value [Abstract]
Fair Value of Financial Instruments	11. FAIR VALUE OF FINANCIAL INSTRUMENTS The Company’s financial instruments consist primarily of cash and equivalents, trade receivables, restricted assets, trade payables, debt instruments, contingent consideration obligations, interest rate swaps and fuel hedges. As of September 30, 2016 and December 31, 2015, the carrying values of cash and equivalents, trade receivables, restricted assets, trade payables and contingent consideration are considered to be representative of their respective fair values. The carrying values of the Company’s debt instruments, excluding certain notes as listed in the table below, approximate their fair values as of September 30, 2016 and December 31, 2015, based on current borrowing rates, current remaining average life to maturity and borrower credit quality for similar types of borrowing arrangements, and are classified as Level 2 within the fair value hierarchy. The carrying values and fair values of the Company’s debt instruments where the carrying values do not approximate their fair values as of September 30, 2016 and December 31, 2015, are as follows:   Carrying Value at Fair Value* at  September 30, 2016 December 31, 2015 September 30, 2016 December 31, 2015  3.30% Senior Notes due 2016 $ - $ 100,000 $ - $ 100,536  4.00% Senior Notes due 2018 $ 50,000 $ 50,000 $ 52,061 $ 51,860  5.25% Senior Notes due 2019 $ 175,000 $ 175,000 $ 193,707 $ 190,985  4.64% Senior Notes due 2021 $ 100,000 $ 100,000 $ 109,906 $ 107,613  2.39% Senior Notes due 2021 $ 150,000 $ - $ 150,372 $ -  3.09% Senior Notes due 2022 $ 125,000 $ 125,000 $ 129,017 $ 123,516  2.75% Senior Notes due 2023 $ 200,000 $ - $ 201,146 $ -  3.41% Senior Notes due 2025 $ 375,000 $ 375,000 $ 392,507 $ 370,245  3.03% Senior Notes due 2026 $ 400,000 $ - $ 405,719 $ - ______________________ * Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value is based on quotes of bonds with similar ratings in similar industries. For details on the fair value of the Company’s interest rate swaps, fuel hedges, restricted assets and contingent consideration, refer to Note 13. 

Net Income (Loss) Per Share Inf

Net Income (Loss) Per Share Information	9 Months Ended
	Sep. 30, 2016
Net Income (Loss) Per Share Information [Abstract]
Net Income (Loss) Per Share Information	12. NET INCOME (LOSS) PER SHARE INFORMATION The following table sets forth the calculation of the numerator and denominator used in the computation of basic and diluted net income (loss) per common share attributable to the Company’s shareholders for the three and nine months ended September 30, 2016 and 2015:   Three months ended September 30, Nine months ended September 30,  2016 2015 2016 2015 Numerator:  Net income (loss) attributable to Waste Connections for basic and diluted earnings per share $ 88,617 $ (257,009) $ 160,948 $ (147,825)  Denominator:  Basic shares outstanding 175,336,967 123,269,902 146,214,552 123,783,217  Dilutive effect of options and warrants 39,006 - 34,896 -  Dilutive effect of restricted share units 390,786 - 460,332 -  Diluted shares outstanding 175,766,759 123,269,902 146,709,780 123,783,217  

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2016
Fair Value [Abstract]
Fair Value Measurements	13. FAIR VALUE MEASUREMENTS The Company uses a three-tier fair value hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis in periods subsequent to their initial measurement. These tiers include: Level 1, defined as quoted market prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, model-based valuation techniques for which all significant assumptions are observable in the market, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and Level 3, defined as unobservable inputs that are not corroborated by market data. The Company’s financial assets and liabilities recorded at fair value on a recurring basis include derivative instruments and restricted assets. The Company’s derivative instruments are pay-fixed, receive-variable interest rate swaps and pay-fixed, receive-variable diesel fuel hedges. The Company’s interest rate swaps are recorded at their estimated fair values based on quotes received from financial institutions that trade these contracts. The Company verifies the reasonableness of these quotes using similar quotes from another financial institution as of each date for which financial statements are prepared. The Company uses a discounted cash flow (“DCF”) model to determine the estimated fair value of the diesel fuel hedges. The assumptions used in preparing the DCF model include: (i) estimates for the forward DOE index curve; and (ii) the discount rate based on risk-free interest rates over the term of the hedge contracts. The DOE index curve used in the DCF model was obtained from financial institutions that trade these contracts and ranged from $2.45 to $2.75 at September 30, 2016 and from $2.21 to $2.64 at December 31, 2015. The weighted average DOE index curve used in the DCF model was $2.64 and $2.43 at September 30, 2016 and December 31, 2015, respectively. Significant increases (decreases) in the forward DOE index curve would result in a significantly higher (lower) fair value measurement. For the Company’s interest rate swaps and fuel hedges, the Company also considers the Company’s creditworthiness in its determination of the fair value measurement of these instruments in a net liability position and the counterparties’ creditworthiness in its determination of the fair value measurement of these instruments in a net asset position. The Company’s restricted assets are valued at quoted market prices in active markets for similar assets, which the Company receives from the financial institutions that hold such investments on its behalf. The Company’s restricted assets measured at fair value are invested primarily in U.S. government and agency securities and Canadian bankers’ acceptance notes. The Company’s assets and liabilities measured at fair value on a recurring basis at September 30, 2016 and December 31, 2015, were as follows:   Fair Value Measurement at September 30, 2016 Using  Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  Interest rate swap derivative instruments – net liability position $ (11,645) $ - $ (11,645) $ -  Fuel hedge derivative instruments – net liability position $ (3,941) $ - $ - $ (3,941)  Restricted assets $ 56,946 $ - $ 56,946 $ -  Contingent consideration $ (51,689) $ - $ - $ (51,689)    Fair Value Measurement at December 31, 2015 Using  Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  Interest rate swap derivative instruments – net liability position $ (9,745) $ - $ (9,745) $ -  Fuel hedge derivative instrument – net liability position $ (9,900) $ - $ - $ (9,900)  Restricted assets $ 46,148 $ - $ 46,148 $ -  Contingent consideration $ (49,394) $ - $ - $ (49,394)  The following table summarizes the changes in the fair value for Level 3 derivatives for the nine months ended September 30, 2016 and 2015:    Nine Months Ended September 30,  2016 2015  Beginning balance $ (9,900) $ (1,979)  Realized losses included in earnings 4,616 2,165  Unrealized gains (losses) included in AOCL 1,343 (7,069)  Ending balance $ (3,941) $ (6,883)   The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the nine months ended September 30, 2016 and 2015:   Nine Months Ended September 30,  2016 2015  Beginning balance $ 49,394 $ 70,165  Contingent consideration recorded at acquisition date 16,247 515  Payment of contingent consideration recorded at acquisition date (12,105) (190)  Payment of contingent consideration recorded in earnings (413) -  Adjustments to contingent consideration (2,563) (19,809)  Interest accretion expense 1,129 2,428  Ending balance $ 51,689 $ 53,109   

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2016
Other Comprehensive Income (Loss) [Abstract]
Other Comprehensive Income (Loss)	14. OTHER COMPREHENSIVE INCOME (LOSS) O ther comprehensive income (loss) includes changes in the fair value of interest rate swaps and fuel hedges that qualify for hedge accounting. The components of other comprehensive income (loss) and related tax effects for the three and nine month periods ended September 30, 2016 and 2015, are as follows:   Three months ended September 30, 2016  Gross Tax effect Net of tax  Interest rate swap amounts reclassified into interest expense $ 1,678 $ (444) $ 1,234  Fuel hedge amounts reclassified into cost of operations 1,342 (512) 830  Changes in fair value of interest rate swaps 3,535 (937) 2,598  Changes in fair value of fuel hedges 1,019 (389) 630  Foreign currency translation adjustment (16,642) - (16,642)  $ (9,068) $ (2,282) $ (11,350)     Three months ended September 30, 2015  Gross Tax effect Net of tax  Interest rate swap amounts reclassified into interest expense $ 1,041 $ (396) $ 645  Fuel hedge amounts reclassified into cost of operations 874 (333) 541  Changes in fair value of interest rate swaps (6,066) 2,280 (3,786)  Changes in fair value of fuel hedges (4,891) 1,852 (3,039)  $ (9,042) $ 3,403 $ (5,639)     Nine months ended September 30, 2016  Gross Tax effect Net of tax  Interest rate swap amounts reclassified into interest expense $ 5,081 $ (1,743) $ 3,338  Fuel hedge amounts reclassified into cost of operations 4,616 (1,761) 2,855  Changes in fair value of interest rate swaps (6,980) 3,084 (3,896)  Changes in fair value of fuel hedges 1,343 (502) 841  Foreign currency translation adjustment (3,991) - (3,991)  $ 69 $ (922) $ (853)     Nine months ended September 30, 2015  Gross Tax effect Net of tax  Interest rate swap amounts reclassified into interest expense $ 3,114 $ (1,185) $ 1,929  Fuel hedge amounts reclassified into cost of operations 2,165 (824) 1,341  Changes in fair value of interest rate swaps (10,503) 3,975 (6,528)  Changes in fair value of fuel hedges (7,069) 2,684 (4,385)  $ (12,293) $ 4,650 $ (7,643)    A rollforward of the amounts included in AOCL, net of taxes, for the nine months ended September 30, 2016 and 2015, is as follows:   Fuel Hedges Interest Rate Swaps Foreign Currency Translation Adjustment Accumulated Other Comprehensive Loss  Balance at December 31, 2015 $ (6,134) $ (6,037) $ - $ (12,171)  Amounts reclassified into earnings 2,855 3,338 - 6,193  Changes in fair value 841 (3,896) - (3,055)  Foreign currency translation adjustment - - (3,991) (3,991)  Balance at September 30, 2016 $ (2,438) $ (6,595) $ (3,991) $ (13,024)    Fuel Hedges Interest Rate Swaps Accumulated Other Comprehensive Loss  Balance at December 31, 2014 $ (1,221) $ (4,372) $ (5,593)  Amounts reclassified into earnings 1,341 1,929 3,270  Changes in fair value (4,385) (6,528) (10,913)  Balance at September 30, 2015 $ (4,265) $ (8,971) $ (13,236)  See Note 10 for further discussion on the Company’s derivative instruments.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2016
Stockholders' Equity [Abstract]
Stockholders' Equity	15. SHAREHOLDERS' EQUITY Common Shares Shares of Old Waste Connections common stock were converted into common shares of New Waste Connections, which do not have a stated par value; therefore, the portion of additional paid-in capital representing the amount of common shares issued above par for Old Waste Connections has been reclassified into common shares of New Waste Connections. Common Shares Held in Trust Common shares held in trust consist of shares of New Waste Connections held in a rabbi trust that were acquired by Progressive Waste prior to June 1, 2016 for the benefit of its employees participating in certain equity-based compensation plans. A total of 490,112 common shares were held in the rabbi trust on June 1, 2016 when it was acquired by the Company in the Progressive Waste acquisition. Common shares held in trust are classified as treasury shares in the Company’s Condensed Consolidated Balance Sheets. The Company will sell shares out of the rabbi trust as employees exercise restricted share units, which will be settled with cash, under the Progressive Waste equity-based compensation plans that were continued by the Company. During the period of June 1, 2016 to September 30, 2016, the Company sold 205,373 common shares held in the rabbi trust as a result of employees exercising cash-settled restricted share units. Special Shares The Company is authorized to issue an unlimited number of special shares. Holders of special shares are entitled to one vote in matters of the Company for each special share held. The special shares carry no right to receive dividends or to receive the remaining property or assets of the Company upon dissolution or wind-up. At September 30, 2016, no special shares were issued. Preferred Shares The Company is authorized to issue an unlimited number of preferred shares, issuable in series. Each series of preferred shares issued shall have rights, privileges, restrictions and conditions as determined by the Board of Directors prior to their issuance. Preferred shareholders are not entitled to vote, but take preference over the common shareholders rights in the remaining property and assets of the Company in the event of dissolution or wind-up. At September 30, 2016, no preferred shares were issued. Share-Based Compensation Restricted Share Units – New Waste Connections A summary of activity related to restricted share units (“RSUs”) during the nine-month period ended September 30, 2016, is presented below:   Unvested Shares  Outstanding at December 31, 2015 1,007,301  Granted 302,149  Forfeited (40,419)  Vested and Issued (402,626)  Vested and Unissued (27,362)  Outstanding at September 30, 2016 839,043   The weighted average grant-date fair value per share for the common shares underlying the RSUs granted during the nine-month period ended September 30, 2016 was $57.46 . Recipients of the Company’s RSUs who participate in the Company’s Nonqualified Deferred Compensation Plan may have elected in years prior to 2015 to defer some or all of their RSUs as they vest until a specified date or dates they choose. At the end of the deferral periods, the Company issues to recipients who deferred their RSUs common shares of the Company underlying the deferred RSUs. At September 30, 2016 and 2015, the Company had 244,225 and 256,621 vested deferred RSUs outstanding, respectively. Performance-Based Restricted Share Units – New Waste Connections A summary of activity related to performance-based restricted share units (“PSUs”) during the nine-month period ended September 30, 2016, is presented below:   Unvested Shares  Outstanding at December 31, 2015 293,413  Granted 147,644  Forfeited (33,335)  Vested and Issued (122,960)  Outstanding at September 30, 2016 284,762   During the nine months ended September 30, 2016, the Compensation Committee granted PSUs to the Company’s executive officers with a one-year performance-based metric that the Company must meet before those awards may be earned, with the awards then subject to time-based vesting for the remaining three years of their four -year vesting period. The Compensation Committee will determine the achievement of performance results and corresponding vesting of PSUs for each performance period. The weighted average grant-date fair value per share for the common shares underlying all PSUs granted during the nine month period ended September 30, 2016 was $56.75 . Restricted Share Units - Progressive Waste Plans New Waste Connections assumed 490,112 of outstanding restricted share units granted under Progressive Waste equity-based compensation plans as of June 1, 2016, of which 418,242 were vested. The Progressive Waste equity-based compensation plans were continued by the Company following the acquisition and allow for the issuance of shares or cash settlement to employees upon vesting. Restricted share units vest over periods that vary from immediately upon award to three years. The Company recorded a liability of $25,925 at June 1, 2016 associated with the fair value of the assumed restricted share units outstanding. The fair value was calculated using a Black-Scholes pricing model which includes assumptions regarding expected remaining life, stock volatility, discount rate and annual dividend rate. During the period from June 1, 2016 to September 30, 2016, 25,972 restricted share units vested as a result of plan provisions requiring accelerated vesting to employees due to a change in control followed by termination of employment. During the period from June 1, 2016 to September 30, 2016, 7,346 restricted share units vested over the remaining service period. No restricted share units under the Progressive Waste equity-based compensation plans were granted subsequent to June 1, 2016. During the period from June 1, 2016 to September 30, 2016, 6,189 restricted share units were forfeited and will be redistributed to other remaining active participants. During the period from June 1, 2016 to September 30, 2016, a total of 205,373 vested restricted share units were cash settled under the plans. At September 30, 2016, 284,739 restricted share units remain outstanding under the Progressive Waste equity-based compensation plans, of which 246,267 were vested. During the period of June 1, 2016 to September 30, 2016, the Company recognized compensation expense of $3,420 related to accelerated vesting and $4,277 related to vesting over remaining service periods for outstanding restricted share units. As of September 30, 2016, the Company has $2,831 of unrecognized compensation cost for restricted share units under the Progressive Waste equity-based compensation plans and a liability of $18,276 representing the September 30, 2016 fair value of outstanding restricted share units, less unrecognized compensation cost. Performance-Based Restricted Share Units - Progressive Waste Plans New Waste Connections assumed 206,856 of outstanding performance-based restricted share units granted under Progressive Waste equity-based compensation plans as of June 1, 2016, of which 38,409 were vested. The Progressive Waste equity-based compensation plans were continued by the Company following the acquisition and allow for cash settlement only to employees upon vesting based on achieving target results. Outstanding performance-based restricted share units vest over periods that vary from one month to three years. The Company recorded a liability of $7,218 at June 1, 2016 associated with the fair value of the assumed restricted share units outstanding. The fair value was calculated using the volume weighted average price of the Company’s shares for the five preceding business days as of September 30, 2016. During the period from June 1, 2016 to September 30, 2016, 75,282 performance-based restricted share units vested as a result of plan provisions requiring accelerated vesting to employees due to a change in control followed by termination of employment. No performance-based restricted share units under the Progressive Waste equity-based compensation plans were granted or forfeited subsequent to June 1, 2016. During the period from June 1, 2016 to September 30, 2016, a total of 124,968 vested performance-based restricted share units were cash settled under the plans, net of notional dividend. At September 30, 2016, 81,888 performance-based restricted share units remain outstanding under the Progressive Waste equity-based compensation plans, of which 59,173 were vested. During the period of June 1, 2016 to September 30, 2016, the Company recognized compensation expense of $4,130 related to accelerated vesting and $1,952 related to vesting over remaining service periods for performance-based restricted share units. As of September 30, 2016, the Company has $1,701 of unrecognized compensation cost for performance-based restricted share units under the Progressive Waste equity-based compensation plans and a liability of $4,433 representing the September 30, 2016 fair value of outstanding performance-based restricted share units, less unrecognized compensation cost. Share Based Options – Progressive Waste Plans New Waste Connections assumed 456,110 of outstanding share based options granted under Progressive Waste equity-based compensation plans as of June 1, 2016, of which 325,045 were vested. The Progressive Waste equity-based compensation plans were continued by the Company following the acquisition and allow for the issuance of shares or cash settlement to employees upon vesting. Outstanding options vest over periods that vary from one to nine months. The Company recorded a liability of $13,022 at June 1, 2016 associated with the fair value of the assumed options outstanding. The fair value was calculated using a Black-Scholes pricing model which includes assumptions regarding expected remaining life, stock volatility, discount rate and annual dividend rate. During the period from June 1, 2016 to September 30, 2016, 63,475 options vested as a result of plan provisions requiring accelerated vesting to employees due to a change in control followed by termination of employment. During the period from June 1, 2016 to September 30, 2016, 22,159 options vested over the remaining service period. No options under the Progressive Waste equity-based compensation plans were granted or forfeited subsequent to June 1, 2016. During the period from June 1, 2016 to September 30, 2016, a total of 4,575 vested options were cash settled under the plans. At September 30, 2016, 451,535 options remain outstanding under the Progressive Waste equity-based compensation plans, of which 403,789 were vested. During the period of June 1, 2016 to September 30, 2016, the Company recognized compensation expense of $472 related to accelerated vesting and $3,449 related to vesting over remaining service periods for options. As of September 30, 2016, the Company has $218 of unrecognized compensation cost for options under the Progressive Waste equity-based compensation plans and a liability of $16,817 representing the September 30, 2016 fair value of outstanding options, less unrecognized compensation cost. Normal Course Issuer Bid On July 19, 2016, the Board of Directors of the Company approved, subject to receipt of regulatory approvals, undertaking a normal course issuer bid (the “NCIB”) to purchase up to 8,770,732 of the Company’s common shares for a one -year period that expires on August 7, 2017 . The Company received TSX approval of the NCIB on August 3, 2016. Under the NCIB, the Company may make share repurchases only in the open market, including on the NYSE, the TSX, and alternative Canadian trading systems, at the prevailing market price at the time of the transaction. In accordance with TSX rules, any daily repurchases made through the TSX and alternative Canadian trading systems would be limited to a maximum of 60,150 common shares, which represents 25% of the average daily trading volume on the TSX of 240,601 common shares for the period from June 1, 2016 to July 31, 2016, being the whole calendar month periods that the Company's shares traded on the TSX from the June 1, 2016 closing of the Progressive Waste acquisition to the date the Company filed its NCIB application with the TSX. The TSX rules also allow the Company to purchase, once a week, a block of common shares not owned by any insiders, which may exceed such daily limit. The maximum number of shares that can be purchased per day on the NYSE will be 25% of the average daily trading volume for the four calendar weeks preceding the date of purchase, subject to certain exceptions for block purchases. The timing and amounts of any repurchases pursuant to the NCIB will depend on many factors, including the Company’s capital structure, the market price of the common shares and overall market conditions. All common shares purchased under the NCIB shall be immediately cancelled following their repurchase. For the nine months ended September 30, 2016, the Company did not repurchase any common shares pursuant to the NCIB or other share repurchase programs. For the nine months ended September 30, 2015, Old Waste Connections repurchased 1,962,989 shares of common stock at an aggregate cost of $91,165 . As of September 30, 2015, Old Waste Connections held 1,050,820 shares of treasury stock at a cost of $49,458 . These shares were retired in October 2015. Cash Dividend In October 2015, Old Waste Connections announced that its Board of Directors increased its regular quarterly cash dividend by $0.015 , from $0.13 to $0.145 per share. Cash dividends of $61,001 and $48,246 were paid by Old Waste Connections during the nine months ended September 30, 2016 and 2015, respectively.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies [Abstract]
Commitments and Contingencies	16. COMMITMENTS AND CONTINGENCIES In the normal course of its business and as a result of the extensive governmental regulation of the solid waste and E&P waste industries, the Company is subject to various judicial and administrative proceedings involving Canadian regulatory authorities as well as U.S. federal, state and local agencies. In these proceedings, an agency may seek to impose fines on the Company or to revoke or deny renewal of an authorization held by the Company, including an operating permit. From time to time, the Company may also be subject to actions brought by special interest or other groups, adjacent landowners or residents in connection with the permitting and licensing of landfills, transfer stations, and E&P waste treatment, recovery and disposal operations, or alleging environmental damage or violations of the permits and licenses pursuant to which the Company operates. In addition, the Company is a party to various claims and suits pending for alleged damages to persons and property, alleged violations of certain laws and alleged liabilities arising out of matters occurring during the normal operation of the waste management business. Except as noted in the matters described below, as of September 30, 2016, there is no current proceeding or litigation involving the Company or its property that the Company believes could have a material adverse impact on its business, financial condition, results of operations or cash flows. Lower Duwamish Waterway Superfund Site Allocation Process The Company’s subsidiary, Northwest Container Services, Inc. (“NWCS”), has been named by the U.S. Environmental Protection Agency, Region 10 (the “EPA”), along with more than 100 others, as a potentially responsible party (“PRP”) under the Comprehensive Environmental Response, Compensation and Liability Act (also known as CERCLA or the “Superfund” law) with respect to the Lower Duwamish Waterway Superfund Site (the “LDW Site”). Listed on the National Priorities List in 2001, the LDW Site is a five-mile stretch of the Duwamish River flowing into Elliott Bay in Seattle, Washington. A group of PRPs known as the Lower Duwamish Working Group or the “LDWG” and consisting of the City of Seattle, King County, the Port of Seattle, and Boeing Company conducted a Remedial Investigation/Feasibility Study for the LDW Site. On December 2, 2014, the EPA issued its Record of Decision (“ROD”) describing the selected clean-up remedy, and therein estimated that clean-up costs (in present value dollars as of November 2014) should total about $342,000 . However, it is possible that additional costs could be incurred based upon various factors. The EPA estimates that it will take seven years to implement the clean-up. The ROD also requires ten years of monitoring following the clean-up, and provides that if clean-up goals have not been met by the end of this period, then additional clean-up activities, at additional cost, may be required at that time. Implementation of the clean-up will not begin until after the ongoing Early Action Area (“EAA”) clean-ups have been completed. Typically, costs for monitoring may be in addition to those expended for the clean-up. While three of the EAA clean-ups have been completed to date, some work remains to be done on three other EAAs. Implementation of the clean-up also must await additional baseline sampling throughout the LDW Site and the preparation of a remedial design for performing the clean-up. On April 27, 2016, the LDWG entered into a third amendment of its Administrative Order on Consent with the EPA (the “AOC 3”) in which it agreed to perform the additional baseline sediment sampling and certain technical studies needed to prepare the actual remedial design. While the schedule for the pre-remedial design work in the AOC 3 is not exact, the Company estimates that the work thereunder may not be completed until 2019. On June 8, 2016, the EPA conducted a public stakeholder meeting regarding the LDW Site. During the public stakeholder meeting, the EPA provided an overview of the AOC 3 pre-remedial design work and the progress of the on-going work on the EAA cleanups. The next EPA stakeholder meeting is scheduled for November 9, 2016, at which time it is anticipated that more current information on the status of the cleanups will be available. In August 2014, NWCS entered into an Alternative Dispute Resolution Memorandum of Agreement with several dozen other PRPs and a neutral allocator to conduct a confidential and non-binding allocation of certain past response costs allegedly incurred at the LDW Site as well as the anticipated future response costs associated with the clean-up. The allocation process is designed to develop evidence relating to each PRP’s nexus, if any, to the LDW Site (regardless of whether that PRP is participating in the allocation process), and to determine each PRP’s share of the past and future response costs. The goal of the allocation process is to reach agreement on a division of responsibility between and amongst the PRPs so that the PRPs then will be in a position to negotiate a global settlement with the EPA. On August 16, 2016, the EPA sent individual letters to each of the PRPs at the LDW Site, including NWCS, stating that it expects to initiate negotiations with all PRPs in early 2018 relating to a Remedial Design/Remedial Action (“RD/RA”) Consent Decree. An RD/RA Consent Decree provides for the cleanup of the entire site and is often referred to as a “global settlement.” In the letter the EPA explained this schedule, noting that it expected the pre-remedial design work under the AOC 3 to be completed by the beginning of 2018, and also that it understood that several PRPs are participating in a neutral allocation which the EPA is hopeful will be completed by early 2018. The EPA encouraged the PRPs to complete the allocation on a schedule consistent with the EPA’s intended negotiation schedule, adding that it expects to initiate the RD/RA negotiations on schedule regardless of the status of the allocation. The Company cannot provide assurance that EPA’s schedule can be met. NWCS is defending itself vigorously in this confidential allocation process. At this point, the Company is not able to determine the likelihood of the allocation process being completed as intended by the participating PRPs, its specific allocation, nor the likelihood of the parties then negotiating a global settlement with the EPA. Thus, NWCS cannot reasonably determine the likelihood of any outcome in this matter. Under CERCLA, certain Federal, State, and Indian Tribe officials are designated as natural resource trustees and have responsibility for ensuring the restoration of injured natural resources. On February 11, 2016, NWCS received a letter (the “Letter”) from the United States Department of Commerce, National Oceanic and Atmospheric Administration (“NOAA”), describing certain investigatory activities conducted by the Elliott Bay Trustee Council (the “Council”). The Council consists of all of the natural resources trustees for the LDW Site as well as two nearby Superfund sites, the Harbor Island site and the Lockheed West site. The members of the Council include the United States, on behalf of the U.S. National Oceanic and Atmospheric Administration and the U.S. Department of the Interior, the Washington State Department of Ecology, and the Suquamish and Muckleshoot Indian Tribes (together, the “Trustees”). The Letter appears to allege that NWCS may be a potentially liable party that allegedly contributed to the release of hazardous substances that have injured natural resources at the LDW Site. Damages to natural resources are in addition to clean-up costs. The Letter, versions of which NWCS believes were sent to all or a group of the PRPs at the LDW Site, also notified its recipients of their opportunity to participate in the Trustees’ development of an Assessment Plan and the performance of a Natural Resources Damages Assessment (“NRDA”) in accordance with the Assessment Plan for both the LDW Site and the east and west waterways of the Harbor Island site. NWCS timely responded with correspondence to the NOAA Office of General Counsel, dated March 9, 2016, in which it declined the invitation at that time. NWCS does not know how other PRPs responded to the Letter, and has not received any further communication from NOAA or the Trustees. The Trustees have not responded to NWCS’ letter and NWCS is not aware of any further action by the Trustees with respect to the Assessment Plan and NRDA. At this point, the Company is not able to determine the likelihood or amount of an assessment of natural resource damages against NWCS in connection with this matter. Some work is being done with respect to natural resource damages (“NRD”) at the LDW Site. On September 22, 2016, a proposed consent decree settlement was announced between the City of Seattle (the “City”) and NOAA and the other natural resource trustees for the LDW Site. The proposed NRD settlement that the City has entered into at the LDW Site, if approved, will generally provide that the City will fund the development of restoration projects by purchasing restoration credits from Bluefield Holdings, a company that develops such projects. At this time, NWCS has not been approached by either the Council or the trustees for the LDW Site regarding participation in any similar NRD settlements . 

Subsequent Event

Subsequent Event	9 Months Ended
	Sep. 30, 2016
Subsequent Event [Abstract]
Subsequent Event	17. SUBSEQUENT EVENT On October 26, 2016 , the Company announced that its Board of Directors increased its regular quarterly cash dividend by $0.035 , from $0.145 to $0.18 per Company common share, and then declared a regular quarterly cash dividend of $0.18 per Company common share. The dividend will be paid on November 21, 2016 , to shareholders of record on the close of business on November 7, 2016 . 

Landfill Accounting (Tables)

Landfill Accounting (Tables)	9 Months Ended
	Sep. 30, 2016
Landfill Accounting [Abstract]
Reconciliation of Final Capping, Closure and Post-Closure Liability Balance	The following is a reconciliation of the Company’s final capping, closure and post-closure liability balance from December 31, 2015 to September 30, 2016:   Final capping, closure and post-closure liability at December 31, 2015 $ 78,613  Adjustments to final capping, closure and post-closure liabilities (6,914)  Liabilities incurred 7,271  Accretion expense associated with landfill obligations 5,740  Closure payments (2,235)  Assumption of closure liabilities from acquisitions 158,712  Final capping, closure and post-closure liability at September 30, 2016 $ 241,187  

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2016
Pro Forma Results of Operations	The following pro forma results of operations assume that the Company’s acquisition of Progressive Waste and its other acquisitions that were collectively insignificant, occurring during the nine months ended September 30, 2016 and 2015, were acquired as of January 1, 2015 (unaudited):   Nine Months Ended September 30,  2016 2015  Total revenue $ 3,136,249 $ 3,092,513  Net income 279,907 (81,256)  Basic income per share 1.60 (0.46)  Diluted income per share 1.60 (0.46) 
Progressive Waste Solutions Ltd. [Member]
Summary of Consideration Transferred to Acquire Businesses and Amounts of Identifiable Assets Acquired, Liabilities Assumed and Noncontrolling Interests	The following table summarizes the consideration transferred to acquire Progressive Waste and the preliminary amounts of identifiable assets acquired and liabilities assumed:  Fair value of consideration transferred:  Shares issued $ 3,503,162  Debt assumed 1,729,274  5,232,436  Less: cash acquired (65,739)  Net fair value of consideration transferred 5,166,697   Recognized amounts of identifiable assets acquired and liabilities assumed associated with the business acquired:  Accounts receivable 231,449  Prepaid expenses and other current assets 29,348  Restricted assets 16,551  Property and equipment 2,100,015  Contracts 223,885  Customer lists 255,112  Other intangibles 218,499  Other assets 6,343  Accounts payable and accrued liabilities (267,153)  Deferred revenue (35,635)  Contingent consideration (15,902)  Other long-term liabilities (185,545)  Deferred income taxes (336,777)  Total identifiable net assets 2,240,190  Goodwill $ 2,926,507 
Other Acquisition [Member]
Summary of Consideration Transferred to Acquire Businesses and Amounts of Identifiable Assets Acquired, Liabilities Assumed and Noncontrolling Interests	The following table summarizes the consideration transferred to acquire these businesses and the preliminary amounts of identifiable assets acquired and liabilities assumed at the acquisition dates for these individually immaterial acquisitions consummated in the nine months ended September 30, 2016 and 2015:   2016 Acquisitions 2015 Acquisitions Fair value of consideration transferred:  Cash $ 13,703 $ 112,090  Notes issued to sellers - 6,091  13,703 118,181  Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:  Accounts receivable 521 6,434  Prepaid expenses and other current assets 477 392  Property and equipment 4,397 32,425  Long-term franchise agreements and contracts - 4,231  Customer lists 5,079 4,070  Permits - 34,998  Indefinite-lived intangibles - 1,257  Other intangibles - 2,073  Other assets 261 977  Accounts payable and accrued liabilities (744) (2,597)  Deferred revenue (659) (2,470)  Contingent consideration (345) (515)  Other long-term liabilities - (1,061)  Total identifiable net assets 8,987 80,214  Goodwill $ 4,716 $ 37,967  

Goodwill and Intangible Asset27

Goodwill and Intangible Assets, Net (Tables)	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets, Net [Abstract]
Intangible Assets Exclusive of Goodwill	Intangible assets, exclusive of goodwill, consisted of the following at September 30, 2016:   Gross Carrying Amount Accumulated Amortization Accumulated Impairment Loss Net Carrying Amount Finite-lived intangible assets: Long-term franchise agreements and contracts $ 433,711 $ (77,025) $ - $ 356,686 Customer lists 433,780 (123,312) - 310,468 Permits and other 299,606 (18,844) - 280,762  1,167,097 (219,181) - 947,916 Indefinite-lived intangible assets: Solid waste collection and transportation permits 152,761 - - 152,761 Material recycling facility permits 42,283 - - 42,283 E&P facility permits 59,855 - (38,507) 21,348  254,899 - (38,507) 216,392 Intangible assets, exclusive of goodwill $ 1,421,996 $ (219,181) $ (38,507) $ 1,164,308  Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2015:   Gross Carrying Amount Accumulated Amortization Accumulated Impairment Loss Net Carrying Amount Finite-lived intangible assets: Long-term franchise agreements and contracts $ 210,384 $ (60,205) $ - $ 150,179 Customer lists 173,855 (96,941) - 76,914 Permits and other 81,240 (13,587) - 67,653  465,479 (170,733) - 294,746 Indefinite-lived intangible assets: Solid waste collection and transportation permits 152,761 - - 152,761 Material recycling facility permits 42,283 - - 42,283 E&P facility permits 59,855 - (38,351) 21,504  254,899 - (38,351) 216,548 Intangible assets, exclusive of goodwill $ 720,378 $ (170,733) $ (38,351) $ 511,294  
Estimated Future Amortization Expense of Amortizable Intangible Assets	Estimated future amortization expense for the next five years relating to finite-lived intangible assets is as follows:   For the year ending December 31, 2016 $ 76,035  For the year ending December 31, 2017 $ 105,045  For the year ending December 31, 2018 $ 98,556  For the year ending December 31, 2019 $ 88,582  For the year ending December 31, 2020 $ 80,115 

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2016
Long-Term Debt [Abstract]
Long-Term Debt	Long-term debt consists of the following:   September 30, 2016 December 31, 2015  Revolver under Credit Agreement, bearing interest ranging from 2.08 % to 2.95 % (a) $ 357,947 $ -  Term loan under Credit Agreement, bearing interest at 1.72 % (a) 1,637,500 -  Revolver under prior credit agreement, bearing interest ranging from 1.44% to 3.70% (b) - 390,000  Term loan under prior credit agreement, bearing interest at 1.44% (b) - 800,000  2016 Notes, bearing interest at 3.30% - 100,000  2018 Notes, bearing interest at 4.00% 50,000 50,000  2019 Notes, bearing interest at 5.25 % 175,000 175,000  2021 Notes, bearing interest at 4.64% 100,000 100,000  New 2021 Notes, bearing interest at 2.39% 150,000 -  2022 Notes, bearing interest at 3.09% 125,000 125,000  2023 Notes, bearing interest at 2.75% 200,000 -  2025 Notes, bearing interest at 3.41% 375,000 375,000  2026 Notes, bearing interest at 3.03% 400,000 -  Tax-exempt bonds, bearing interest ranging from 0.84 % to 0.96 % (a) 95,430 31,430  Notes payable to sellers and other third parties, bearing interest at 3.00 % to 24.81 % (a) 14,439 10,855  3,680,316 2,157,285  Less – current portion (1,624) (2,127)  Less – debt issuance costs (16,721) (8,031)  $ 3,661,971 $ 2,147,127 ____________________ (a) Interest rates represent the interest rates incurred at September 30, 2016 . (b) Interest rates represent the interest rates incurred at December 31, 2015 .
Details of the Company's Credit Agreement	Details of the Credit Agreement at September 30, 2016 are as follows:   Revolver under Credit Agreement  Available $ 956,682  Letters of credit outstanding $ 247,871  Total amount drawn, as follows: $ 357,947  Amount drawn – Canadian prime rate loan $ 11,436  Interest rate applicable - Canadian prime rate loan 2.95%  Amount drawn – Canadian BA loan $ 346,511  Interest rate applicable – Canadian BA loan 2.08%  Commitment – rate applicable 0.15%  Term loan under Credit Agreement  Amount drawn – U.S. based LIBOR loan $ 1,637,500  Interest rate applicable – U.S. based LIBOR loan 1.72% 

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Summary of Financial Information Concerning Company's Reportable Segments	Summarized financial information concerning the Company’s reportable segments for the three and nine months ended September 30, 2016 and 2015, is shown in the following tables:  Three Months Ended September 30, 2016 Revenue Intercompany Revenue (b) Reported Revenue Segment EBITDA (c)  Southern $ 317,727 $ (37,818) $ 279,909 $ 62,189  Western 276,941 (30,050) 246,891 84,214  Eastern 229,525 (34,719) 194,806 59,019  Canada 204,158 (26,413) 177,745 64,915  Central 176,109 (20,842) 155,267 58,079  E&P 33,785 (3,481) 30,304 8,919  Corporate (a) - - - (18,299)  $ 1,238,245 $ (153,323) $ 1,084,922 $ 319,036   Three Months Ended September 30, 2015 Revenue Intercompany Revenue (b) Reported Revenue Segment EBITDA (c)  Southern $ 43,442 $ (5,954) $ 37,488 $ 9,730  Western 257,480 (27,026) 230,454 76,279  Eastern 113,150 (19,157) 93,993 30,641  Central 150,211 (16,101) 134,110 50,564  E&P 54,901 (3,008) 51,893 17,541  Corporate (a) - - - 2,474  $ 619,184 $ (71,246) $ 547,938 $ 187,229   Nine Months Ended September 30, 2016 Revenue Intercompany Revenue (b) Reported Revenue Segment EBITDA (c)  Southern $ 497,863 $ (60,485) $ 437,378 $ 98,906  Western 789,716 (87,160) 702,556 237,839  Eastern 526,565 (81,379) 445,186 138,456  Canada 274,260 (35,931) 238,329 88,471  Central 468,004 (53,130) 414,874 154,510  E&P 97,883 (8,965) 88,918 21,953  Corporate (a) - - - (102,653)  $ 2,654,291 $ (327,050) $ 2,327,241 $ 637,482   Nine Months Ended September 30, 2015 Revenue Intercompany Revenue (b) Reported Revenue Segment EBITDA (c)  Southern $ 125,597 $ (17,614) $ 107,983 $ 26,715  Western 734,729 (76,261) 658,468 218,185  Eastern 325,788 (54,488) 271,300 87,134  Central 419,875 (44,342) 375,533 138,779  E&P 181,530 (9,464) 172,066 55,003  Corporate (a) - - - 4,856  $ 1,787,519 $ (202,169) $ 1,585,350 $ 530,672 ____________________ (a) Corporate functions include accounting, legal, tax, treasury, information technology, risk management, human resources, training and other administrative functions. Amounts reflected are net of allocations to the six operating segments. For the three and nine months ended September 30, 2016, amounts also include costs associated with the Progressive Waste acquisition. (b) Intercompany revenues reflect each segment’s total intercompany sales, including intercompany sales within a segment and between segments. Transactions within and between segments are generally made on a basis intended to reflect the market value of the service. (c) For those items included in the determination of segment EBITDA, the accounting policies of the segments are the same as those described in Old Waste Connections’ most recent Annual Report on Form 10-K, with the exception of foreign currency transaction gains (losses) for which the accounting policy is described in Note 2 in these Condensed Consolidated Financial Statements.
Total Assets for Reportable Segments	Total assets for each of the Company’s reportable segments at September 30, 2016 and December 31, 2015, were as follows:    September 30, 2016 December 31, 2015  Southern $ 2,867,903 $ 259,046  Western 1,504,750 1,498,296  Eastern 1,542,612 1,062,761  Canada 2,618,008 -  Central 1,296,360 1,070,505  E&P 1,072,818 1,115,234  Corporate 285,242 115,956  Total Assets $ 11,187,693 $ 5,121,798 
Changes in Goodwill by Reportable Segment	The following tables show changes in goodwill during the nine months ended September 30, 2016 and 2015, by reportable segment:      Southern Western Eastern Canada Central E&P Total  Balance as of December 31, 2015 $ - $ 373,820 $ 499,237 $ - $ 472,425 $ 77,343 $ 1,422,825  Goodwill transferred (a) 95,710 - (39,705) - (56,005) - -  Goodwill acquired 1,338,806 2,696 75,769 1,465,720 48,232 - 2,931,223  Impact of changes in foreign currency - - - (2,878) - - (2,878)  Balance as of September 30, 2016 $ 1,434,516 $ 376,516 $ 535,301 $ 1,462,842 $ 464,652 $ 77,343 $ 4,351,170         Southern Western Eastern Central E&P Total  Balance as of December 31, 2014 $ - $ 372,915 $ 392,423 $ 460,381 $ 468,070 $ 1,693,789  Goodwill transferred (a) 92,510 - (55,206) (37,304) - -  Goodwill acquired 3,341 870 6,855 5,842 21,059 37,967  Impairment loss - - - - (411,786) (411,786)  Balance as of September 30, 2015 $ 95,851 $ 373,785 $ 344,072 $ 428,919 $ 77,343 $ 1,319,970 ____________________ (a) In June 2016, as a result of the Progressive Waste acquisition, described in Note 6, the Company realigned its reporting structure and changed its three geographic operating segments (Western, Central and Eastern) to five geographic operating segments (Southern, Western, Eastern, Canada and Central). Additionally, the Company realigned certain of the Company’s districts between operating segments. This realignment resulted in the reallocation of goodwill among its segments, which is reflected in the “Goodwill transferred” line item.
Reconciliation of Primary Measure of Segment Profitability to Income Before Income Tax Provision	A reconciliation of the Company’s primary measure of segment profitability (segment EBITDA) to Income before income tax provision in the Condensed Consolidated Statements of Net Income is as follows:   Three months ended September 30, Nine months ended September 30,  2016 2015 2016 2015  Southern segment EBITDA $ 62,189 $ 9,730 $ 98,906 $ 26,715  Western segment EBITDA 84,214 76,279 237,839 218,185  Eastern segment EBITDA 59,019 30,641 138,456 87,134  Canada segment EBITDA 64,915 - 88,471 -  Central segment EBITDA 58,079 50,564 154,510 138,779  E&P segment EBITDA 8,919 17,541 21,953 55,003  Subtotal reportable segments 337,335 184,755 740,135 525,816  Unallocated corporate overhead (18,299) 2,474 (102,653) 4,856  Depreciation (125,744) (61,373) (270,988) (178,318)  Amortization of intangibles (26,944) (7,195) (48,719) (21,458)  Impairments and other operating items (7,682) (493,813) (4,634) (494,158)  Interest expense (27,621) (16,367) (65,291) (47,386)  Other income (expense), net 671 (1,303) 179 (1,430)  Foreign currency transaction gain (loss) (350) - 339 -  Income (loss) before income tax provision $ 131,366 $ (392,822) $ 248,368 $ (212,078)  
Total Reported Revenues by Service Line	The following tables reflect a breakdown of the Company’s revenue and inter-company eliminations for the periods indicated:   Three months ended September 30, 2016  Revenue Intercompany Revenue Reported Revenue % of Reported Revenue  Solid waste collection $ 760,281 $ (2,472) $ 757,809 69.9%  Solid waste disposal and transfer 377,998 (144,459) 233,539 21.5  Solid waste recycling 32,138 (2,523) 29,615 2.7  E&P waste treatment, recovery and disposal 33,673 (3,608) 30,065 2.8  Intermodal and other 34,155 (261) 33,894 3.1  Total $ 1,238,245 $ (153,323) $ 1,084,922 100.0%    Three months ended September 30, 2015  Revenue Intercompany Revenue Reported Revenue % of Reported Revenue  Solid waste collection $ 354,490 $ (1,250) $ 353,240 64.5%  Solid waste disposal and transfer 180,442 (66,322) 114,120 20.8  Solid waste recycling 12,213 (155) 12,058 2.2  E&P waste treatment, recovery and disposal 54,695 (3,519) 51,176 9.3  Intermodal and other 17,344 - 17,344 3.2  Total $ 619,184 $ (71,246) $ 547,938 100.0%    Nine months ended September 30, 2016  Revenue Intercompany Revenue Reported Revenue % of Reported Revenue  Solid waste collection $ 1,619,827 $ (5,571) $ 1,614,256 69.4%  Solid waste disposal and transfer 804,928 (307,308) 497,620 21.4  Solid waste recycling 60,876 (4,554) 56,322 2.4  E&P waste treatment, recovery and disposal 97,259 (9,228) 88,031 3.8  Intermodal and other 71,401 (389) 71,012 3.0  Total $ 2,654,291 $ (327,050) $ 2,327,241 100.0%    Nine months ended September 30, 2015  Revenue Intercompany Revenue Reported Revenue % of Reported Revenue  Solid waste collection $ 1,024,078 $ (3,150) $ 1,020,928 64.4%  Solid waste disposal and transfer 494,804 (187,486) 307,318 19.4  Solid waste recycling 35,614 (654) 34,960 2.2  E&P waste treatment, recovery and disposal 183,103 (10,879) 172,224 10.9  Intermodal and other 49,920 - 49,920 3.1  Total $ 1,787,519 $ (202,169) $ 1,585,350 100.0% 

Derivative Financial Instrume30

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value of Derivative Instrument Designated as Cash Flow Hedges	 The fair values of derivative instruments designated as cash flow hedges as of September 30, 2016, were as follows:   Derivatives Designated as Cash Asset Derivatives Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value  Interest rate swaps $ - Accrued liabilities (a) $ (4,636)  Other long-term liabilities (7,009)   Fuel hedges Other assets, net 12 Accrued liabilities (b) (3,953)  Total derivatives designated as cash flow hedges $ 12 $ (15,598) ____________________ (a) Represents the estimated amount of the existing unrealized losses on interest rate swaps as of September 30, 2016 (based on the interest rate yield curve at that date), included in AOCL expected to be reclassified into pre-tax earnings within the next 12 months. The actual amounts reclassified into earnings are dependent on future movements in interest rates. (b) Represents the estimated amount of the existing unrealized losses on fuel hedges as of September 30, 2016 (based on the forward DOE diesel fuel index curve at that date), included in AOCL expected to be reclassified into pre-tax earnings within the next 12 months. The actual amounts reclassified into earnings are dependent on future movements in diesel fuel prices.  The fair values of derivative instruments designated as cash flow hedges as of December 31, 2015, were as follows:  Derivatives Designated as Cash Asset Derivatives Liability Derivatives Flow Hedges Balance Sheet Location Fair Value Balance Sheet Location Fair Value  Interest rate swaps $ - Accrued liabilities $ (5,425)  Other long-term liabilities (4,320)   Fuel hedges - Accrued liabilities (5,699)  Other long-term liabilities (4,201)  Total derivatives designated as cash flow hedges $ - $ (19,645)  
Impact of Cash Flow Hedges on Results of Operations, Comprehensive Income and Accumulated Other Comprehensive Loss	The following table summarizes the impact of the Company’s cash flow hedges on the results of operations, comprehensive income (loss) and AOCL for the three and nine months ended September 30, 2016 and 2015:  Derivatives Designated as Cash Flow Hedges Amount of Gain or (Loss) Recognized as AOCL on Derivatives, Net of Tax (Effective Portion) (a) Statement of Net Income Classification Amount of (Gain) or Loss Reclassified from AOCL into Earnings, Net of Tax (Effective Portion) (b),(c)  Three Months Ended September 30, Three Months Ended September 30,  2016 2015 2016 2015  Interest rate swaps $ 2,598 $ (3,786) Interest expense $ 1,234 $ 645  Fuel hedges 630 (3,039) Cost of operations 830 541  Total $ 3,228 $ (6,825) $ 2,064 $ 1,186   Derivatives Designated as Cash Flow Hedges Amount of Gain or (Loss) Recognized as AOCL on Derivatives, Net of Tax (Effective Portion) (a) Statement of Net Income Classification Amount of (Gain) or Loss Reclassified from AOCL into Earnings, Net of Tax (Effective Portion) (b),(c)  Nine Months Ended September 30, Nine Months Ended September 30,  2016 2015 2016 2015  Interest rate swaps $ (3,896) $ (6,528) Interest expense $ 3,338 $ 1,929  Fuel hedges 841 (4,385) Cost of operations 2,855 1,341  Total $ (3,055) $ (10,913) $ 6,193 $ 3,270 ___________________ (a) In accordance with the derivatives and hedging guidance, the effective portions of the changes in fair values of interest rate swaps and fuel hedges have been recorded in equity as a component of AOCL. As the critical terms of the interest rate swaps match the underlying debt being hedged, no ineffectiveness is recognized on these swaps and, therefore, all unrealized changes in fair value are recorded in AOCL. Because changes in the actual price of diesel fuel and changes in the DOE index price do not offset exactly each reporting period, the Company assesses whether the fuel hedges are highly effective using the cumulative dollar offset approach. (b) Amounts reclassified from AOCL into earnings related to realized gains and losses on interest rate swaps are recognized when interest payments or receipts occur related to the swap contracts, which correspond to when interest payments are made on the Company’s hedged debt. (c) Amounts reclassified from AOCL into earnings related to realized gains and losses on the fuel hedges are recognized when settlement payments or receipts occur related to the hedge contracts, which correspond to when the underlying fuel is consumed.
Interest Rate Swap [Member]
Company's Derivative Instruments	At September 30, 2016, the Company’s derivative instruments included 12 interest rate swap agreements as follows:   Date Entered Notional Amount Fixed Interest Rate Paid* Variable Interest Rate Received Effective Date Expiration Date  December 2011 $ 175,000 1.600% 1-month LIBOR February 2014 February 2017  April 2014 $ 100,000 1.800% 1-month LIBOR July 2014 July 2019  May 2014 $ 50,000 2.344% 1-month LIBOR October 2015 October 2020  May 2014 $ 25,000 2.326% 1-month LIBOR October 2015 October 2020  May 2014 $ 50,000 2.350% 1-month LIBOR October 2015 October 2020  May 2014 $ 50,000 2.350% 1-month LIBOR October 2015 October 2020  April 2016 $ 100,000 1.000% 1-month LIBOR February 2017 February 2020  June 2016 $ 75,000 0.850% 1-month LIBOR February 2017 February 2020  June 2016 $ 150,000 0.950% 1-month LIBOR January 2018 January 2021  June 2016 $ 150,000 0.950% 1-month LIBOR January 2018 January 2021  July 2016 $ 50,000 0.900% 1-month LIBOR January 2018 January 2021  July 2016 $ 50,000 0.890% 1-month LIBOR January 2018 January 2021 ____________________ * Plus applicable margin.
Fuel [Member] | Commodity Contract [Member]
Company's Derivative Instruments	At September 30, 2016, the Company’s derivative instruments included four fuel hedge agreements as follows:  Date Entered Notional Amount (in gallons per month) Diesel Rate Paid Fixed (per gallon) Diesel Rate Received Variable Effective Date Expiration Date  May 2015 300,000 $3.2800 DOE Diesel Fuel Index* January 2016 December 2017  May 2015 200,000 $3.2750 DOE Diesel Fuel Index* January 2016 December 2017  July 2016 500,000 $2.4988 DOE Diesel Fuel Index* January 2017 December 2017  July 2016 1,000,000 $2.6345 DOE Diesel Fuel Index* January 2018 December 2018 ____________________ * If the national U.S. on-highway average price for a gallon of diesel fuel (“average price”), as published by the U.S. Department of Energy (“DOE”), exceeds the contract price per gallon, the Company receives the difference between the average price and the contract price (multiplied by the notional number of gallons) from the counterparty. If the average price is less than the contract price per gallon, the Company pays the difference to the counterparty. 

Fair Value of Financial Instr31

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value [Abstract]
Carrying Values and Fair Values of Debt Instruments	The carrying values and fair values of the Company’s debt instruments where the carrying values do not approximate their fair values as of September 30, 2016 and December 31, 2015, are as follows:   Carrying Value at Fair Value* at  September 30, 2016 December 31, 2015 September 30, 2016 December 31, 2015  3.30% Senior Notes due 2016 $ - $ 100,000 $ - $ 100,536  4.00% Senior Notes due 2018 $ 50,000 $ 50,000 $ 52,061 $ 51,860  5.25% Senior Notes due 2019 $ 175,000 $ 175,000 $ 193,707 $ 190,985  4.64% Senior Notes due 2021 $ 100,000 $ 100,000 $ 109,906 $ 107,613  2.39% Senior Notes due 2021 $ 150,000 $ - $ 150,372 $ -  3.09% Senior Notes due 2022 $ 125,000 $ 125,000 $ 129,017 $ 123,516  2.75% Senior Notes due 2023 $ 200,000 $ - $ 201,146 $ -  3.41% Senior Notes due 2025 $ 375,000 $ 375,000 $ 392,507 $ 370,245  3.03% Senior Notes due 2026 $ 400,000 $ - $ 405,719 $ - ______________________ * Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value is based on quotes of bonds with similar ratings in similar industries.

Net Income (Loss) Per Share I32

Net Income (Loss) Per Share Information (Tables)	9 Months Ended
	Sep. 30, 2016
Net Income (Loss) Per Share Information [Abstract]
Basic and Diluted Net Income (Loss) Per Common Share	The following table sets forth the calculation of the numerator and denominator used in the computation of basic and diluted net income (loss) per common share attributable to the Company’s shareholders for the three and nine months ended September 30, 2016 and 2015:   Three months ended September 30, Nine months ended September 30,  2016 2015 2016 2015 Numerator:  Net income (loss) attributable to Waste Connections for basic and diluted earnings per share $ 88,617 $ (257,009) $ 160,948 $ (147,825)  Denominator:  Basic shares outstanding 175,336,967 123,269,902 146,214,552 123,783,217  Dilutive effect of options and warrants 39,006 - 34,896 -  Dilutive effect of restricted share units 390,786 - 460,332 -  Diluted shares outstanding 175,766,759 123,269,902 146,709,780 123,783,217  

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value [Abstract]
Assets and Liabilities Measured At Fair Value on Recurring Basis	The Company’s assets and liabilities measured at fair value on a recurring basis at September 30, 2016 and December 31, 2015, were as follows:   Fair Value Measurement at September 30, 2016 Using  Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  Interest rate swap derivative instruments – net liability position $ (11,645) $ - $ (11,645) $ -  Fuel hedge derivative instruments – net liability position $ (3,941) $ - $ - $ (3,941)  Restricted assets $ 56,946 $ - $ 56,946 $ -  Contingent consideration $ (51,689) $ - $ - $ (51,689)    Fair Value Measurement at December 31, 2015 Using  Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  Interest rate swap derivative instruments – net liability position $ (9,745) $ - $ (9,745) $ -  Fuel hedge derivative instrument – net liability position $ (9,900) $ - $ - $ (9,900)  Restricted assets $ 46,148 $ - $ 46,148 $ -  Contingent consideration $ (49,394) $ - $ - $ (49,394) 
Change in Fair Value for Level 3 Derivatives	The following table summarizes the changes in the fair value for Level 3 derivatives for the nine months ended September 30, 2016 and 2015:    Nine Months Ended September 30,  2016 2015  Beginning balance $ (9,900) $ (1,979)  Realized losses included in earnings 4,616 2,165  Unrealized gains (losses) included in AOCL 1,343 (7,069)  Ending balance $ (3,941) $ (6,883)  
Fair Value for Level 3 Liabilities	The following table summarizes the changes in the fair value for Level 3 liabilities related to contingent consideration for the nine months ended September 30, 2016 and 2015:   Nine Months Ended September 30,  2016 2015  Beginning balance $ 49,394 $ 70,165  Contingent consideration recorded at acquisition date 16,247 515  Payment of contingent consideration recorded at acquisition date (12,105) (190)  Payment of contingent consideration recorded in earnings (413) -  Adjustments to contingent consideration (2,563) (19,809)  Interest accretion expense 1,129 2,428  Ending balance $ 51,689 $ 53,109  

Other Comprehensive Income (L34

Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2016
Other Comprehensive Income (Loss) [Abstract]
Components of Other Comprehensive Income (Loss)	The components of other comprehensive income (loss) and related tax effects for the three and nine month periods ended September 30, 2016 and 2015, are as follows:   Three months ended September 30, 2016  Gross Tax effect Net of tax  Interest rate swap amounts reclassified into interest expense $ 1,678 $ (444) $ 1,234  Fuel hedge amounts reclassified into cost of operations 1,342 (512) 830  Changes in fair value of interest rate swaps 3,535 (937) 2,598  Changes in fair value of fuel hedges 1,019 (389) 630  Foreign currency translation adjustment (16,642) - (16,642)  $ (9,068) $ (2,282) $ (11,350)     Three months ended September 30, 2015  Gross Tax effect Net of tax  Interest rate swap amounts reclassified into interest expense $ 1,041 $ (396) $ 645  Fuel hedge amounts reclassified into cost of operations 874 (333) 541  Changes in fair value of interest rate swaps (6,066) 2,280 (3,786)  Changes in fair value of fuel hedges (4,891) 1,852 (3,039)  $ (9,042) $ 3,403 $ (5,639)     Nine months ended September 30, 2016  Gross Tax effect Net of tax  Interest rate swap amounts reclassified into interest expense $ 5,081 $ (1,743) $ 3,338  Fuel hedge amounts reclassified into cost of operations 4,616 (1,761) 2,855  Changes in fair value of interest rate swaps (6,980) 3,084 (3,896)  Changes in fair value of fuel hedges 1,343 (502) 841  Foreign currency translation adjustment (3,991) - (3,991)  $ 69 $ (922) $ (853)     Nine months ended September 30, 2015  Gross Tax effect Net of tax  Interest rate swap amounts reclassified into interest expense $ 3,114 $ (1,185) $ 1,929  Fuel hedge amounts reclassified into cost of operations 2,165 (824) 1,341  Changes in fair value of interest rate swaps (10,503) 3,975 (6,528)  Changes in fair value of fuel hedges (7,069) 2,684 (4,385)  $ (12,293) $ 4,650 $ (7,643)   
Amounts Included in Accumulated Other Comprehensive Loss	A rollforward of the amounts included in AOCL, net of taxes, for the nine months ended September 30, 2016 and 2015, is as follows:   Fuel Hedges Interest Rate Swaps Foreign Currency Translation Adjustment Accumulated Other Comprehensive Loss  Balance at December 31, 2015 $ (6,134) $ (6,037) $ - $ (12,171)  Amounts reclassified into earnings 2,855 3,338 - 6,193  Changes in fair value 841 (3,896) - (3,055)  Foreign currency translation adjustment - - (3,991) (3,991)  Balance at September 30, 2016 $ (2,438) $ (6,595) $ (3,991) $ (13,024)    Fuel Hedges Interest Rate Swaps Accumulated Other Comprehensive Loss  Balance at December 31, 2014 $ (1,221) $ (4,372) $ (5,593)  Amounts reclassified into earnings 1,341 1,929 3,270  Changes in fair value (4,385) (6,528) (10,913)  Balance at September 30, 2015 $ (4,265) $ (8,971) $ (13,236) 

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2016
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Activity Related to Restricted Stock Units	A summary of activity related to restricted share units (“RSUs”) during the nine-month period ended September 30, 2016, is presented below:   Unvested Shares  Outstanding at December 31, 2015 1,007,301  Granted 302,149  Forfeited (40,419)  Vested and Issued (402,626)  Vested and Unissued (27,362)  Outstanding at September 30, 2016 839,043  
Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Performance-Based Restricted Stock Units Activity and Related Information	A summary of activity related to performance-based restricted share units (“PSUs”) during the nine-month period ended September 30, 2016, is presented below:   Unvested Shares  Outstanding at December 31, 2015 293,413  Granted 147,644  Forfeited (33,335)  Vested and Issued (122,960)  Outstanding at September 30, 2016 284,762  

New Accounting Standards (Narra

New Accounting Standards (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
New Accounting Standards [Abstract]
Deferred tax asset, current	$ 82,547	$ 49,727

Landfill Accounting (Narrative)

Landfill Accounting (Narrative) (Details) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2016USD ($)site$ / T	Sep. 30, 2015USD ($)$ / T	Dec. 31, 2015USD ($)
Landfill Accounting [Line Items]
Number of municipal solid waste landfills owned or operated by company	69
Number of owned landfills that only accept exploration and production waste	11
Number of owned landfills that only accept construction and demolition, industrial and other non-putrescible waste	14
Number of landfills owned and operated by company	80
Number of landfills operated, not owned, under life-of-site operating agreements	8
Number of landfills operated under limited-term operating agreements	6
Property and equipment, net | $	$ 4,773,096		$ 2,738,288
Average remaining landfill life based on permitted capacity and projected annual disposal volumes	28 years
Number of owned landfills the company is seeking to expand	17
Number of landfills operated under life-of-site operating agreements that the company is seeking to expand	2
Average remaining landfill life based on permitted capacity, projected annual disposal volumes and probable expansion capacity	34 years
Life of Company's owned landfills and landfills operated under life-of-site operating agreements min range	1 year
Life of Company's owned landfills and landfills operated under life of site operating agreements max range	185 years
Landfill depletion expense | $	$ 98,075	$ 61,226
Average rate per ton consumed related to landfill depletion at owned landfills and landfills operated under life-of-site agreements | $ / T	4.27	3.87
Discount rate for purposes of computing layers for final capping, closure and post-closure obligations	4.75%		4.75%
Inflation rate for purposes of computing layers for final capping, closure and post-closure obligations	2.50%		2.50%
Accretion expense associated with landfill obligations | $	$ 5,740	$ 2,756
Average rate per ton consumed related to final capping, closure and post-closure landfill accretion expense | $ / T	0.25	0.17
Restricted asset balance for purposes of securing our performance of future final capping, closure and post-closure obligations | $	$ 55,452		$ 43,636
Landfill [Member]
Landfill Accounting [Line Items]
Property and equipment, net | $	$ 2,774,659

Landfill Accounting (Reconcilia

Landfill Accounting (Reconciliation of Final Capping, Closure and Post-Closure Liability Balance) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Landfill Accounting [Abstract]
Final capping, closure and post-closure liability at the beginning of the period	$ 78,613
Adjustments to final capping, closure and post-closure liabilities	(6,914)
Liabilities incurred	7,271
Accretion expense associated with landfill obligations	5,740	$ 2,756
Closure payments	(2,235)
Assumption of closure liabilities from acquisitions	158,712
Final capping, closure and post-closure liability at the end of the period	$ 241,187

Acquisitions (Narrative) (Detai

Acquisitions (Narrative) (Detail) $ / shares in Units, $ in Thousands	Jun. 02, 2016USD ($)shares	Mar. 31, 2015USD ($)	Jan. 31, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2016USD ($)entity	Sep. 30, 2015USD ($)territoryentity	Jun. 30, 2016	Jun. 01, 2016USD ($)$ / shares
Business Acquisition [Line Items]
Cash consideration, net of cash acquired							$ 13,703	$ 112,090
Increase in goodwill				$ 64,590
Increase in property and equipment				16,408
Acquisition-related costs								$ 1,372
Number of individual businesses acquired that are not specifically described | entity								10
Decrease in contingent consideration							(2,563)	$ (19,809)
Revenues				1,084,922	$ 547,938		2,327,241	1,585,350
Income before income tax provision				131,366	(392,822)		248,368	(212,078)
Goodwill expected to be deductible for tax purposes					37,967			37,967
Goodwill acquired							2,931,223	37,967
Trade receivables acquired in business combination gross contractual amount					6,705			6,705
Trade receivables acquired In business combination expected to be uncollectible amount					$ 271			$ 271
Contracts [Member]
Business Acquisition [Line Items]
Increase in intangible assets				13,473
Customer Lists [Member]
Business Acquisition [Line Items]
Increase in intangible assets				19,609
Shale Gas [Member]
Business Acquisition [Line Items]
Number of E&P waste stream treatment and recycling operations acquired | territory								2
Cash consideration, net of cash acquired			$ 41,000
Contingent consideration payable period			2 years
Contingent consideration			$ 0	0		$ 0	$ 0
DNCS [Member]
Business Acquisition [Line Items]
Cash consideration, net of cash acquired		$ 30,000
Fair value discount rate		4.75%
Long-term note payment period		20 years
Liabilities incurred		$ 5,088
Payment terms							The long-term note requires ten annual principal payments of $500, followed by an additional ten annual principal payments of $250, for total future cash payments of $7,500. The fair value of the long-term note was determined by applying a discount rate of 4.75% to the payments over the 20-year payment period.
Total future cash payments		7,500
DNCS [Member] | First 10 Years [Member]
Business Acquisition [Line Items]
Annual principal payment		500
DNCS [Member] | Years 11 Through 20 [Member]
Business Acquisition [Line Items]
Annual principal payment		$ 250
Progressive Waste Solutions Ltd. [Member]
Business Acquisition [Line Items]
Contingent consideration payable period							1 year
Issuance of common shares to acquire Progressive Waste, shares | shares	52,145,919
Closing price per share | $ / shares										$ 67.18
Acquisition-related costs							$ 31,588
Revenues						687,108
Income before income tax provision						68,289
Goodwill expected to be deductible for tax purposes				303,594		303,594	303,594
Goodwill acquired							2,926,507
Trade receivables acquired in business combination gross contractual amount				238,952		238,952	238,952
Trade receivables acquired In business combination expected to be uncollectible amount				7,503		7,503	$ 7,503
Progressive Waste Solutions Ltd. [Member] | Waste Connections, Inc. [Member]
Business Acquisition [Line Items]
Stockholders equity stock conversion ratio							2.076843
Percentage of combined company owned									70.00%
Progressive Waste Solutions Ltd. [Member] | Progressive Waste [Member]
Business Acquisition [Line Items]
Percentage of combined company owned									30.00%
Other Acquisition [Member]
Business Acquisition [Line Items]
Acquisition-related costs							$ 773
Number of immaterial businesses acquired in period | entity							10
Goodwill expected to be deductible for tax purposes				4,716		4,716	$ 4,716
Goodwill acquired							4,716
Trade receivables acquired in business combination gross contractual amount				947		947	947
Trade receivables acquired In business combination expected to be uncollectible amount				426		$ 426	$ 426
Fair value of acquired working capital is provisional | entity							4
Debt [Member]
Business Acquisition [Line Items]
Liabilities incurred							$ 1,729,274	$ 6,091
Debt [Member] | Progressive Waste Solutions Ltd. [Member]
Business Acquisition [Line Items]
Liabilities incurred	$ 1,729,274						1,729,274
Debt [Member] | Progressive Waste Solutions Ltd. [Member] | Credit Agreement [Member]
Business Acquisition [Line Items]
Liabilities incurred							$ 1,659,465
Tax-exempt Bonds [Member] | Progressive Waste Solutions Ltd. [Member]
Business Acquisition [Line Items]
Liabilities incurred	64,000
Other Long-term Liabilities [Member} | Progressive Waste Solutions Ltd. [Member]
Business Acquisition [Line Items]
Liabilities incurred	$ 5,809
Contingent Consideration [Member] | Progressive Waste Solutions Ltd. [Member]
Business Acquisition [Line Items]
Fair value discount rate	2.00%
Contingent payable fair value										$ 10,488
Contingent Consideration [Member] | Progressive Waste Solutions Ltd. [Member] | Maximum [Member]
Business Acquisition [Line Items]
Contingent payable fair value										$ 5,000
Deferred Income Taxes [Member]
Business Acquisition [Line Items]
Increase in deferred income taxes				$ 112,661

Acquisitions (Summary of Consid

Acquisitions (Summary of Consideration Transferred to Acquire Businesses and Amounts of Identifiable Assets Acquired, Liabilities Assumed and Noncontrolling Interests) (Detail) - USD ($) $ in Thousands	Jun. 02, 2016	Sep. 30, 2016	Sep. 30, 2015
Fair value of consideration transferred:
Cash			$ 112,090
Consideration transferred			118,181
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts receivable			6,434
Prepaid expenses and other current assets			392
Property and equipment			32,425
Indefinite-lived intangibles			1,257
Other assets			977
Deferred revenue			(2,470)
Other long-term liabilities			(1,061)
Total identifiable net assets			80,214
Goodwill		$ 2,931,223	37,967
Accounts Payable and Accrued Liabilities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts payable and accrued liabilities			(2,597)
Debt [Member]
Fair value of consideration transferred:
Liabilities incurred		1,729,274	6,091
Contingent Consideration [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Other long-term liabilities			(515)
Other Acquisition [Member]
Fair value of consideration transferred:
Cash		13,703
Consideration transferred		13,703
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts receivable		521
Prepaid expenses and other current assets		477
Property and equipment		4,397
Other assets		261
Deferred revenue		(659)
Total identifiable net assets		8,987
Goodwill		4,716
Other Acquisition [Member] | Accounts Payable and Accrued Liabilities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts payable and accrued liabilities		(744)
Other Acquisition [Member] | Contingent Consideration [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Other long-term liabilities		(345)
Progressive Waste Solutions Ltd. [Member]
Fair value of consideration transferred:
Shares issued		3,503,162
Less: cash acquired		(65,739)
Consideration transferred		5,232,436
Net fair value of consideration transferred		5,166,697
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts receivable		231,449
Prepaid expenses and other current assets		29,348
Property and equipment		2,100,015
Other assets		6,343
Deferred revenue		(35,635)
Other long-term liabilities		(185,545)
Deferred income taxes		(336,777)
Total identifiable net assets		2,240,190
Goodwill		2,926,507
Progressive Waste Solutions Ltd. [Member] | Restricted Assets [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Other assets		16,551
Progressive Waste Solutions Ltd. [Member] | Accounts Payable and Accrued Liabilities [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts payable and accrued liabilities		(267,153)
Progressive Waste Solutions Ltd. [Member] | Debt [Member]
Fair value of consideration transferred:
Liabilities incurred	$ 1,729,274	1,729,274
Progressive Waste Solutions Ltd. [Member] | Contingent Consideration [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Other long-term liabilities		(15,902)
Contracts [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles			4,231
Contracts [Member] | Progressive Waste Solutions Ltd. [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles		223,885
Customer Lists [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles			4,070
Customer Lists [Member] | Other Acquisition [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles		5,079
Customer Lists [Member] | Progressive Waste Solutions Ltd. [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles		255,112
Permits and Other [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles			34,998
Other Intangibles
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles			$ 2,073
Other Intangibles | Progressive Waste Solutions Ltd. [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Intangibles		$ 218,499

Acquisitions (Pro Forma Results

Acquisitions (Pro Forma Results of Operations) (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Acquisitions [Abstract]
Total revenue	$ 3,136,249	$ 3,092,513
Net income	$ 279,907	$ (81,256)
Basic income per share	$ 1.60	$ (0.46)
Diluted income per share	$ 1.60	$ (0.46)

Goodwill and Intangible Asset42

Goodwill and Intangible Assets, Net (Narrative) (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)segment	Sep. 30, 2015USD ($)segment	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Number of operating segments | segment		6
Number of reporting units | segment		6	4
Goodwill impairment charge			$ 411,786
Goodwill	$ 1,319,970	$ 4,351,170	1,319,970	$ 1,422,825	$ 1,693,789
Property and equipment, net		4,773,096		2,738,288
Indefinite-lived intangible assets		$ 216,392		216,548
Long-term Franchise Agreements and Contracts [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period of acquired intangible assets		15 years 6 months
Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period of acquired intangible assets		11 years 7 months 6 days
Permits and Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period of acquired intangible assets		20 years
Exploration and Production [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value discount rate	11.60%
Goodwill impairment charge	$ 411,786		411,786
Goodwill	77,343	$ 77,343	$ 77,343	77,343	$ 468,070
Impairments on long-lived assets	63,928
Impairment charges on indefinite-lived intangible assets	$ 38,300
Exploration and Production Facility Permits [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets		$ 21,348		$ 21,504

Goodwill and Intangible Asset43

Goodwill and Intangible Assets, Net (Intangible Assets Exclusive of Goodwill) (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	$ 1,167,097	$ 465,479
Intangible assets, exclusive of goodwill, gross	1,421,996	720,378
Finite-lived intangible assets, accumulated amortization	(219,181)	(170,733)
Intangible assets, accumulated impairment loss	(38,507)	(38,351)
Finite-lived intangible assets, net carrying amount	947,916	294,746
Intangible assets, net, exclusive of goodwill	1,164,308	511,294
Indefinite-lived intangible assets, gross carrying amount	254,899	254,899
Indefinite-lived intangible assets	216,392	216,548
Solid Waste Collection and Transportation Permits [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Intangible assets, accumulated impairment loss
Indefinite-lived intangible assets, gross carrying amount	152,761	152,761
Indefinite-lived intangible assets	152,761	152,761
Material Recycling Facility Permits [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Intangible assets, accumulated impairment loss
Indefinite-lived intangible assets, gross carrying amount	42,283	42,283
Indefinite-lived intangible assets	42,283	42,283
Exploration and Production Facility Permits [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Intangible assets, accumulated impairment loss	(38,507)	(38,351)
Indefinite-lived intangible assets, gross carrying amount	59,855	59,855
Indefinite-lived intangible assets	21,348	21,504
Long-term Franchise Agreements and Contracts [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	433,711	210,384
Finite-lived intangible assets, accumulated amortization	(77,025)	(60,205)
Finite-lived intangible assets, net carrying amount	356,686	150,179
Customer Lists [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	433,780	173,855
Finite-lived intangible assets, accumulated amortization	(123,312)	(96,941)
Finite-lived intangible assets, net carrying amount	310,468	76,914
Permits and Other [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount	299,606	81,240
Finite-lived intangible assets, accumulated amortization	(18,844)	(13,587)
Finite-lived intangible assets, net carrying amount	$ 280,762	$ 67,653

Goodwill and Intangible Asset44

Goodwill and Intangible Assets, Net (Estimated Future Amortization Expense of Amortizable Intangible Assets) (Detail) $ in Thousands	Sep. 30, 2016USD ($)
Goodwill and Intangible Assets, Net [Abstract]
For the year ending December 31, 2016	$ 76,035
For the year ending December 31, 2017	105,045
For the year ending December 31, 2018	98,556
For the year ending December 31, 2019	88,582
For the year ending December 31, 2020	$ 80,115

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Detail) - USD ($)		Jun. 02, 2016	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long term debt			$ 3,680,316,000		$ 2,157,285,000
Debt issuance costs			13,508,000	$ 6,651,000
Cash and cash equivalents			119,335,000	23,553,000	$ 10,974,000	$ 14,353,000
Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capicity			$ 3,200,000,000
Covenant decription			as of the last day of each fiscal quarter, the ratio of (a) (i) Consolidated Total Funded Debt (as defined in the Credit Agreement) as of such date less (ii) the sum of cash and cash equivalents of the Company and its subsidiaries on a dollar-for-dollar basis as of such date in excess of $50,000 up to a maximum of $200,000 (such that the maximum amount of reduction pursuant to this calculation does not exceed $150,000) to (b) Consolidated EBITDA (as defined in the Credit Agreement), measured for the preceding 12 months, to not more than 3.50 to 1.00 (or 3.75 to 1.00 during material acquisition periods, subject to certain limitations). The Credit Agreement also includes a financial covenant requiring the ratio of Consolidated EBIT (as defined in the Credit Agreement) to Consolidated Total Interest Expense (as defined in the Credit Agreement), in each case, measured for the preceding 12 months, to be not less than 2.75 to 1.00. During the continuance of an event of default, the Lenders may take a number of actions, including, among others, declaring the entire amount then outstanding under the Credit Agreement to be due and payable.
Covenant compliance			As of September 30, 2016, the Company was in compliance with all applicable covenants in the Credit Agreement.
Maturity date			Jun. 1, 2021
Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capicity			$ 1,562,500,000
Long term debt	[1]		357,947,000
Credit facility outstanding			357,947,000
Credit Agreement [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capicity			$ 1,637,500,000
Credit Agreement [Member] | Minimum [Member]
Debt Instrument [Line Items]
Required interest coverage ratio			2.75
Credit Agreement [Member] | Minimum [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate	[1]		2.08%
Credit Agreement [Member] | Maximum [Member]
Debt Instrument [Line Items]
Reguired leverage ratio during material acquisition period			3.75
Required leverage ratio			3.50
Credit Agreement [Member] | Maximum [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capicity			$ 500,000,000
Credit Agreement [Member] | Maximum [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate	[1]		2.95%
Credit Agreement [Member] | Maximum [Member] | Swing Line Loans [Member]
Debt Instrument [Line Items]
Swing line loans			$ 75,000,000
Prior Credit Agreement [Member]
Debt Instrument [Line Items]
Covenant compliance			As of December 31, 2015, Old Waste Connections was in compliance with all applicable covenants in the 2015 Old Waste Connections Credit Agreement
Commitment fee					0.15%
Prior Credit Agreement [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Credit facility outstanding					$ 78,373,000
Revolving credit term loan maximum borrowing capacity					250,000,000
Prior Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capicity					1,200,000,000
Long term debt	[2]				390,000,000
Credit facility outstanding					390,000,000
Prior Credit Agreement [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Credit facility outstanding					800,000,000
Aggregate principal amount					800,000,000
Prior Credit Agreement [Member] | Swing Line Loans [Member]
Debt Instrument [Line Items]
Credit facility outstanding					$ 5,000,000
Prior Credit Agreement [Member] | Minimum [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate	[2]				1.44%
Prior Credit Agreement [Member] | Maximum [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate	[2]				3.70%
2016 Master Note Purchase Agreement [Member]
Debt Instrument [Line Items]
Covenant compliance			As of September 30, 2016, the Company was in compliance with all applicable covenants in the 2016 NPA
Maximum limit of aggregate principal amount of notes outstanding			$ 1,500,000,000
Assumed 2008 Note Purchase Agreement [Member]
Debt Instrument [Line Items]
Covenant compliance			As of September 30, 2016, the Company was in compliance with all applicable covenants in the 2008 NPA
Maximum limit of aggregate principal amount of notes outstanding			$ 1,250,000,000
Tax-exempt Bonds [Member]
Debt Instrument [Line Items]
Long term debt	[1]		$ 95,430,000		$ 31,430,000
Tax-exempt Bonds [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	[1]		0.84%
Tax-exempt Bonds [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	[1]		0.96%
Notes Payable to Sellers and Other Third Parties [Member]
Debt Instrument [Line Items]
Long term debt	[1]		$ 14,439,000		10,855,000
Notes Payable to Sellers and Other Third Parties [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	[1]		3.00%
Notes Payable to Sellers and Other Third Parties [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	[1]		24.81%
Senior Notes [Member] | 2016 Master Note Purchase Agreement [Member]
Debt Instrument [Line Items]
Debt issuance costs			$ 5,319,000
Aggregate principal amount			750,000,000
Senior Notes [Member] | Assumed 2008 Note Purchase Agreement [Member]
Debt Instrument [Line Items]
Aggregate principal amount			825,000,000
Senior Notes [Member] | Senior Notes due 2016 [Member]
Debt Instrument [Line Items]
Long term debt					$ 100,000,000
Interest rate					3.30%
Senior Notes [Member] | Senior Notes due 2018 [Member]
Debt Instrument [Line Items]
Long term debt			$ 50,000,000		$ 50,000,000
Interest rate			4.00%		4.00%
Aggregate principal amount			$ 50,000,000
Senior Notes [Member] | Senior Notes due 2019 [Member]
Debt Instrument [Line Items]
Long term debt			$ 175,000,000		$ 175,000,000
Interest rate			5.25%		5.25%
Aggregate principal amount			$ 175,000,000
Senior Notes [Member] | Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Long term debt			$ 100,000,000		$ 100,000,000
Interest rate			4.64%		4.64%
Aggregate principal amount			$ 100,000,000
Senior Notes [Member] | New Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Long term debt			$ 150,000,000
Maturity date			Jun. 1, 2021
Interest rate			2.39%
Aggregate principal amount			$ 150,000,000
Senior Notes [Member] | Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Long term debt			$ 125,000,000		$ 125,000,000
Interest rate			3.09%		3.09%
Aggregate principal amount			$ 125,000,000
Senior Notes [Member] | Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Long term debt			$ 200,000,000
Maturity date			Jun. 1, 2023
Interest rate			2.75%		2.75%
Aggregate principal amount			$ 200,000,000
Senior Notes [Member] | Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Long term debt			$ 375,000,000		$ 375,000,000
Interest rate			3.41%		3.41%
Aggregate principal amount			$ 375,000,000
Senior Notes [Member] | Senior Notes due 2026 [Member]
Debt Instrument [Line Items]
Long term debt			$ 400,000,000
Maturity date			Jun. 1, 2026
Interest rate			3.03%		3.03%
Aggregate principal amount			$ 400,000,000
Term Loan Facility [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Long term debt	[1]		$ 1,637,500,000
Interest rate	[1]		1.72%
Term Loan Facility [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility maximum increase to borrowing capacity			$ 500,000,000
Maximum amount of increase in commitments under the credit agreement			3,700,000,000
Term Loan Facility [Member] | Prior Credit Agreement [Member]
Debt Instrument [Line Items]
Long term debt	[2]				$ 800,000,000
Interest rate	[2]				1.44%
Other Assets [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Prepaid expense, debt issuance costs			6,913,000
Debt [Member]
Debt Instrument [Line Items]
Liabilities incurred			1,729,274,000	$ 6,091,000
Debt [Member] | Progressive Waste Solutions Ltd. [Member]
Debt Instrument [Line Items]
Liabilities incurred		$ 1,729,274,000	1,729,274,000
Debt [Member] | Credit Agreement [Member] | Progressive Waste Solutions Ltd. [Member]
Debt Instrument [Line Items]
Liabilities incurred			1,659,465,000
Debt [Member] | Prior Credit Agreement [Member] | Progressive Waste Solutions Ltd. [Member]
Debt Instrument [Line Items]
Liabilities incurred		1,659,465,000
Tax-exempt Bonds [Member] | Progressive Waste Solutions Ltd. [Member]
Debt Instrument [Line Items]
Liabilities incurred		64,000,000
Other Long-term Liabilities [Member} | Progressive Waste Solutions Ltd. [Member]
Debt Instrument [Line Items]
Liabilities incurred		$ 5,809,000
Credit Agreement Covenant [Member] | Credit Agreement [Member] | Minimum [Member]
Debt Instrument [Line Items]
Cash and cash equivalents			50,000,000
Credit Agreement Covenant [Member] | Credit Agreement [Member] | Maximum [Member]
Debt Instrument [Line Items]
Cash and cash equivalents			200,000,000
Credit Agreement Covenant [Member] | Other Assets [Member] | Credit Agreement [Member] | Maximum [Member]
Debt Instrument [Line Items]
Cash and cash equivalents			$ 150,000,000
Base Rate [Member] | Prior Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate					3.70%
Base Rate [Member] | Prior Credit Agreement [Member] | Swing Line Loans [Member]
Debt Instrument [Line Items]
Margin rate for loans					0.50%
Base Rate [Member] | Canadian Prime Rate Loans and Swing Line Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Margin rate for loans			0.00%
Base Rate [Member] | Canadian Prime Rate Loans and Swing Line Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Margin rate for loans			0.50%
LIBOR [Member] | Credit Agreement [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Long term debt			$ 1,637,500,000
Interest rate			1.72%
LIBOR [Member] | Prior Credit Agreement [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Margin rate for loans					1.20%
LIBOR [Member] | Prior Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility outstanding					$ 385,000,000
Interest rate					1.44%
LIBOR [Member] | Prior Credit Agreement [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Margin rate for loans					1.20%
Interest rate					1.44%
LIBOR [Member] | Drawing Fees for Bankers' Acceptance and BA Loans and Letter of Credit [Member] | Minimum [Member]
Debt Instrument [Line Items]
Margin rate for loans			1.00%
LIBOR [Member] | Drawing Fees for Bankers' Acceptance and BA Loans and Letter of Credit [Member] | Maximum [Member]
Debt Instrument [Line Items]
Margin rate for loans			1.50%
Canadian Prime Rate [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility outstanding			$ 11,436,000
Interest rate applicable			2.95%
Canadian Bankers Acceptance Loan [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility outstanding			$ 346,511,000
Interest rate applicable			2.08%
[1]	Interest rates represent the interest rates incurred at September 30, 2016
[2]	Interest rates represent the interest rates incurred at December 31, 2015

Long-Term Debt (Long-Term Debt)

Long-Term Debt (Long-Term Debt) (Detail) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total debt		$ 3,680,316	$ 2,157,285
Less - current portion		(1,624)	(2,127)
Less - debt issuance costs		(16,721)	(8,031)
Long-term debt and notes payable		3,661,971	2,147,127
Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total debt	[1]	$ 357,947
Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	[1]	2.08%
Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	[1]	2.95%
Credit Agreement [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Total debt	[1]	$ 1,637,500
Interest rate	[1]	1.72%
Prior Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total debt	[2]		$ 390,000
Prior Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	[2]		1.44%
Prior Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	[2]		3.70%
Prior Credit Agreement [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Total debt	[2]		$ 800,000
Interest rate	[2]		1.44%
Senior Notes due 2016 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total debt			$ 100,000
Interest rate			3.30%
Debt instrument maturity date year		2,016
Senior Notes due 2018 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total debt		$ 50,000	$ 50,000
Interest rate		4.00%	4.00%
Debt instrument maturity date year		2,018
Senior Notes due 2019 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total debt		$ 175,000	$ 175,000
Interest rate		5.25%	5.25%
Debt instrument maturity date year		2,019
Senior Notes due 2021 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total debt		$ 100,000	$ 100,000
Interest rate		4.64%	4.64%
Debt instrument maturity date year		2,021
New Senior Notes due 2021 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total debt		$ 150,000
Interest rate		2.39%
Debt instrument maturity date year		2,021
Senior Notes due 2022 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total debt		$ 125,000	$ 125,000
Interest rate		3.09%	3.09%
Debt instrument maturity date year		2,022
Senior Notes due 2023 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total debt		$ 200,000
Interest rate		2.75%	2.75%
Debt instrument maturity date year		2,023
Senior Notes due 2025 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total debt		$ 375,000	$ 375,000
Interest rate		3.41%	3.41%
Debt instrument maturity date year		2,025
Senior Notes due 2026 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total debt		$ 400,000
Interest rate		3.03%	3.03%
Debt instrument maturity date year		2,026
Tax-exempt Bonds [Member]
Debt Instrument [Line Items]
Total debt	[1]	$ 95,430	$ 31,430
Tax-exempt Bonds [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	[1]	0.84%
Tax-exempt Bonds [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	[1]	0.96%
Notes Payable to Sellers and Other Third Parties [Member]
Debt Instrument [Line Items]
Total debt	[1]	$ 14,439	$ 10,855
Notes Payable to Sellers and Other Third Parties [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	[1]	3.00%
Notes Payable to Sellers and Other Third Parties [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	[1]	24.81%
[1]	Interest rates represent the interest rates incurred at September 30, 2016
[2]	Interest rates represent the interest rates incurred at December 31, 2015

Long-Term Debt (Details of the

Long-Term Debt (Details of the Company's Credit Agreement) (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2016	Dec. 31, 2015
Line of Credit Facility [Line Items]
Amount drawn		$ 3,680,316	$ 2,157,285
Revolving Credit Facility [Member] | Credit Agreement [Member]
Line of Credit Facility [Line Items]
Amount drawn		357,947
Available		$ 956,682
Commitment - rate applicable		0.15%
Amount drawn	[1]	$ 357,947
Letter of Credit [Member] | Credit Agreement [Member]
Line of Credit Facility [Line Items]
Letter of credit		247,871
LIBOR [Member] | Term Loan Facility [Member] | Credit Agreement [Member]
Line of Credit Facility [Line Items]
Amount drawn		$ 1,637,500
Interest rate applicable		1.72%
Canadian Prime Rate [Member] | Revolving Credit Facility [Member] | Credit Agreement [Member]
Line of Credit Facility [Line Items]
Amount drawn		$ 11,436
Interest rate applicable		2.95%
Canadian Bankers Acceptance Loan [Member] | Revolving Credit Facility [Member] | Credit Agreement [Member]
Line of Credit Facility [Line Items]
Amount drawn		$ 346,511
Interest rate applicable		2.08%
[1]	Interest rates represent the interest rates incurred at September 30, 2016

Segment Reporting (Narrative) (

Segment Reporting (Narrative) (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)customersegment	Sep. 30, 2015USD ($)
Business Acquisition [Line Items]
Number of contracts or customers accounted for more than 10% of the Company's total revenues at the consolidated or reportable segment level | customer	0
Number of operating segments | segment	6
Number of reportable segments | segment	6
Acquisition-related costs		$ 1,372
Progressive Waste Solutions Ltd. [Member]
Business Acquisition [Line Items]
Acquisition-related costs	$ 31,588
Severance expenses	24,245
Synergy bonus	5,300
Excise taxes	14,466
Equity based compensation expense assumed	$ 17,806

Segment Reporting (Summary of F

Segment Reporting (Summary of Financial Information Concerning Company's Reportable Segments) (Detail) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2016USD ($)		Sep. 30, 2015USD ($)		Sep. 30, 2016USD ($)segment	Sep. 30, 2015USD ($)
Segment Reporting Information [Line Items]
Revenue		$ 1,084,922		$ 547,938		$ 2,327,241	$ 1,585,350
Segment EBITDA	[1]	319,036		187,229		$ 637,482	530,672
Number of operating segments | segment						6
Intercompany Revenues [Member]
Segment Reporting Information [Line Items]
Revenue	[2]	(153,323)		(71,246)		$ (327,050)	(202,169)
Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue		1,238,245		619,184		2,654,291	1,787,519
Segment EBITDA		337,335		184,755		740,135	525,816
Southern [Member]
Segment Reporting Information [Line Items]
Revenue		279,909		37,488		437,378	107,983
Segment EBITDA	[1]	62,189		9,730		98,906	26,715
Southern [Member] | Intercompany Revenues [Member]
Segment Reporting Information [Line Items]
Revenue	[2]	(37,818)		(5,954)		(60,485)	(17,614)
Southern [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue		317,727		43,442		497,863	125,597
Western [Member]
Segment Reporting Information [Line Items]
Revenue		246,891		230,454		702,556	658,468
Segment EBITDA	[1]	84,214		76,279		237,839	218,185
Western [Member] | Intercompany Revenues [Member]
Segment Reporting Information [Line Items]
Revenue	[2]	(30,050)		(27,026)		(87,160)	(76,261)
Western [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue		276,941		257,480		789,716	734,729
Eastern [Member]
Segment Reporting Information [Line Items]
Revenue		194,806		93,993		445,186	271,300
Segment EBITDA	[1]	59,019		30,641		138,456	87,134
Eastern [Member] | Intercompany Revenues [Member]
Segment Reporting Information [Line Items]
Revenue	[2]	(34,719)		(19,157)		(81,379)	(54,488)
Eastern [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue		229,525		113,150		526,565	325,788
Canada [Member]
Segment Reporting Information [Line Items]
Revenue		177,745				238,329
Segment EBITDA	[1]	64,915				88,471
Canada [Member] | Intercompany Revenues [Member]
Segment Reporting Information [Line Items]
Revenue	[2]	(26,413)				(35,931)
Canada [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue		204,158				274,260
Central [Member]
Segment Reporting Information [Line Items]
Revenue		155,267	[3]	134,110		414,874	375,533
Segment EBITDA	[1]	58,079	[3]	50,564		154,510	138,779
Central [Member] | Intercompany Revenues [Member]
Segment Reporting Information [Line Items]
Revenue	[2]	(20,842)	[3]	(16,101)		(53,130)	(44,342)
Central [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue		176,109	[3]	150,211		468,004	419,875
Exploration and Production [Member]
Segment Reporting Information [Line Items]
Revenue		30,304		51,893	[3]	88,918	172,066
Segment EBITDA	[1]	8,919		17,541	[3]	21,953	55,003
Exploration and Production [Member] | Intercompany Revenues [Member]
Segment Reporting Information [Line Items]
Revenue	[2]	(3,481)		(3,008)	[3]	(8,965)	(9,464)
Exploration and Production [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue		33,785		54,901	[3]	97,883	181,530
Corporate [Member]
Segment Reporting Information [Line Items]
Revenue	[3]
Segment EBITDA	[1],[3]	$ (18,299)		2,474		$ (102,653)	4,856
Corporate [Member] | Intercompany Revenues [Member]
Segment Reporting Information [Line Items]
Revenue	[2],[3]
Corporate [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	[3]
[1]	For those items included in the determination of segment EBITDA, the accounting policies of the segments are the same as those described in Old Waste Connections' most recent Annual Report on Form 10-K, with the exception of foreign currency transaction gains (losses) for which the accounting policy is described in Note 2 in these Condensed Consolidated Financial Statements.
[2]	Intercompany revenues reflect each segment's total intercompany sales, including intercompany sales within a segment and between segments. Transactions within and between segments are generally made on a basis intended to reflect the market value of the service.
[3]	Corporate functions include accounting, legal, tax, treasury, information technology, risk management, human resources, training and other administrative functions. Amounts reflected are net of allocations to the six operating segments. For the three and nine months ended September 30, 2016, amounts also include costs associated with the Progressive Waste acquisition.

Segment Reporting (Total Assets

Segment Reporting (Total Assets for Reportable Segments) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Assets	$ 11,187,693	$ 5,121,798
Southern [Member]
Segment Reporting Information [Line Items]
Assets	2,867,903	259,046
Western [Member]
Segment Reporting Information [Line Items]
Assets	1,504,750	1,498,296
Eastern [Member]
Segment Reporting Information [Line Items]
Assets	1,542,612	1,062,761
Canada [Member]
Segment Reporting Information [Line Items]
Assets	2,618,008
Central [Member]
Segment Reporting Information [Line Items]
Assets	1,296,360	1,070,505
Exploration and Production [Member]
Segment Reporting Information [Line Items]
Assets	1,072,818	1,115,234
Corporate [Member]
Segment Reporting Information [Line Items]
Assets	$ 285,242	$ 115,956

Segment Reporting (Changes in G

Segment Reporting (Changes in Goodwill by Reportable Segment) (Detail) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Goodwill [Line Items]
Goodwill, Beginning Balance			$ 1,422,825	$ 1,693,789
Goodwill acquired			2,931,223	37,967
Impairment loss				(411,786)
Impact of changes in foreign currency			(2,878)
Goodwill, Ending Balance		$ 1,319,970	4,351,170	1,319,970
Southern [Member]
Goodwill [Line Items]
Goodwill transferred	[1]		95,710	92,510
Goodwill acquired			1,338,806	3,341
Goodwill, Ending Balance		95,851	1,434,516	95,851
Western [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance			373,820	372,915
Goodwill acquired			2,696	870
Goodwill, Ending Balance		373,785	376,516	373,785
Eastern [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance			499,237	392,423
Goodwill transferred	[1]		(39,705)	(55,206)
Goodwill acquired			75,769	6,855
Goodwill, Ending Balance		344,072	535,301	344,072
Canada [Member]
Goodwill [Line Items]
Goodwill acquired			1,465,720
Impact of changes in foreign currency			(2,878)
Goodwill, Ending Balance			1,462,842
Central [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance			472,425	460,381
Goodwill transferred	[1]		(56,005)	(37,304)
Goodwill acquired			48,232	5,842
Goodwill, Ending Balance		428,919	464,652	428,919
Exploration and Production [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance			77,343	468,070
Goodwill acquired				21,059
Impairment loss		(411,786)		(411,786)
Goodwill, Ending Balance		$ 77,343	$ 77,343	$ 77,343
[1]	In June 2016, as a result of the Progressive Waste acquisition, described in Note 6, the Company realigned its reporting structure and changed its three geographic operating segments (Western, Central and Eastern) to five geographic operating segments (Southern, Western, Eastern, Canada and Central). Additionally, the Company realigned certain of the Company's districts between operating segments. This realignment resulted in the reallocation of goodwill among its segments, which is reflected in the "Goodwill transferred" line item.

Segment Reporting (Reconciliati

Segment Reporting (Reconciliation of Primary Measure of Segment Profitability to Income Before Income Tax Provision) (Detail) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2016	Sep. 30, 2015
Segment EBITDA	[1]	$ 319,036		$ 187,229		$ 637,482	$ 530,672
Depreciation		(125,744)		(61,373)		(270,988)	(178,318)
Amortization of intangibles		(26,944)		(7,195)		(48,719)	(21,458)
Other operating items		(7,682)		(493,813)		(4,634)	(494,158)
Interest expense		(27,621)		(16,367)		(65,291)	(47,386)
Other income (expense), net		671		(1,303)		179	(1,430)
Foreign currency transaction gain		(350)				339
Income (loss) before income tax provision		131,366		(392,822)		248,368	(212,078)
Southern [Member]
Segment EBITDA	[1]	62,189		9,730		98,906	26,715
Western [Member]
Segment EBITDA	[1]	84,214		76,279		237,839	218,185
Eastern [Member]
Segment EBITDA	[1]	59,019		30,641		138,456	87,134
Canada [Member]
Segment EBITDA	[1]	64,915				88,471
Central [Member]
Segment EBITDA	[1]	58,079	[2]	50,564		154,510	138,779
Exploration and Production [Member]
Segment EBITDA	[1]	8,919		17,541	[2]	21,953	55,003
Corporate [Member]
Segment EBITDA	[1],[2]	(18,299)		2,474		(102,653)	4,856
Reportable Segments [Member]
Segment EBITDA		$ 337,335		$ 184,755		$ 740,135	$ 525,816
[1]	For those items included in the determination of segment EBITDA, the accounting policies of the segments are the same as those described in Old Waste Connections' most recent Annual Report on Form 10-K, with the exception of foreign currency transaction gains (losses) for which the accounting policy is described in Note 2 in these Condensed Consolidated Financial Statements.
[2]	Corporate functions include accounting, legal, tax, treasury, information technology, risk management, human resources, training and other administrative functions. Amounts reflected are net of allocations to the six operating segments. For the three and nine months ended September 30, 2016, amounts also include costs associated with the Progressive Waste acquisition.

Segment Reporting (Total Report

Segment Reporting (Total Reported Revenues by Service Line) (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue from External Customer [Line Items]
Revenues		$ 1,084,922	$ 547,938	$ 2,327,241	$ 1,585,350
Percentage of reported revenue		100.00%	100.00%	100.00%	100.00%
Solid Waste Collection [Member]
Revenue from External Customer [Line Items]
Revenues		$ 757,809	$ 353,240	$ 1,614,256	$ 1,020,928
Percentage of reported revenue		69.90%	64.50%	69.40%	64.40%
Solid Waste Disposal and Transfer [Member]
Revenue from External Customer [Line Items]
Revenues		$ 233,539	$ 114,120	$ 497,620	$ 307,318
Percentage of reported revenue		21.50%	20.80%	21.40%	19.40%
Solid Waste Recycling [Member]
Revenue from External Customer [Line Items]
Revenues		$ 29,615	$ 12,058	$ 56,322	$ 34,960
Percentage of reported revenue		2.70%	2.20%	2.40%	2.20%
E&P Waste Treatment, Recovery and Disposal [Member]
Revenue from External Customer [Line Items]
Revenues		$ 30,065	$ 51,176	$ 88,031	$ 172,224
Percentage of reported revenue		2.80%	9.30%	3.80%	10.90%
Intermodal and Other [Member]
Revenue from External Customer [Line Items]
Revenues		$ 33,894	$ 17,344	$ 71,012	$ 49,920
Percentage of reported revenue		3.10%	3.20%	3.00%	3.10%
Intercompany Revenues [Member]
Revenue from External Customer [Line Items]
Revenues	[1]	$ (153,323)	$ (71,246)	$ (327,050)	$ (202,169)
Intercompany Revenues [Member] | Solid Waste Collection [Member]
Revenue from External Customer [Line Items]
Revenues		(2,472)	(1,250)	(5,571)	(3,150)
Intercompany Revenues [Member] | Solid Waste Disposal and Transfer [Member]
Revenue from External Customer [Line Items]
Revenues		(144,459)	(66,322)	(307,308)	(187,486)
Intercompany Revenues [Member] | Solid Waste Recycling [Member]
Revenue from External Customer [Line Items]
Revenues		(2,523)	(155)	(4,554)	(654)
Intercompany Revenues [Member] | E&P Waste Treatment, Recovery and Disposal [Member]
Revenue from External Customer [Line Items]
Revenues		(3,608)	(3,519)	(9,228)	(10,879)
Intercompany Revenues [Member] | Intermodal and Other [Member]
Revenue from External Customer [Line Items]
Revenues		(261)		(389)
Reportable Segments [Member]
Revenue from External Customer [Line Items]
Revenues		1,238,245	619,184	2,654,291	1,787,519
Reportable Segments [Member] | Solid Waste Collection [Member]
Revenue from External Customer [Line Items]
Revenues		760,281	354,490	1,619,827	1,024,078
Reportable Segments [Member] | Solid Waste Disposal and Transfer [Member]
Revenue from External Customer [Line Items]
Revenues		377,998	180,442	804,928	494,804
Reportable Segments [Member] | Solid Waste Recycling [Member]
Revenue from External Customer [Line Items]
Revenues		32,138	12,213	60,876	35,614
Reportable Segments [Member] | E&P Waste Treatment, Recovery and Disposal [Member]
Revenue from External Customer [Line Items]
Revenues		33,673	54,695	97,259	183,103
Reportable Segments [Member] | Intermodal and Other [Member]
Revenue from External Customer [Line Items]
Revenues		$ 34,155	$ 17,344	$ 71,401	$ 49,920
[1]	Intercompany revenues reflect each segment's total intercompany sales, including intercompany sales within a segment and between segments. Transactions within and between segments are generally made on a basis intended to reflect the market value of the service.

Derivative Financial Instrume54

Derivative Financial Instruments (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)agreement	Sep. 30, 2015USD ($)
Derivative Financial Instruments [Abstract]
Number of interest rate swap agreements	12
Number of fuel hedge agreements	4
Ineffectiveness recognized on the fuel hedges | $	$ 0	$ 0

Derivative Financial Instrume55

Derivative Financial Instruments (Company's Derivative Instruments of Interest Rate Swaps) (Details) - LIBOR [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Interest Rate Swap One [Member]
Derivative [Line Items]
Date entered	2011-12
Notional amount	$ 175,000
Fixed interest rate paid	1.60%	[1]
Variable interest rate received	1-month LIBOR
Effective date	2014-02
Expiration date	2017-02
Interest Rate Swap Two [Member]
Derivative [Line Items]
Date entered	2014-04
Notional amount	$ 100,000
Fixed interest rate paid	1.80%	[1]
Variable interest rate received	1-month LIBOR
Effective date	2014-07
Expiration date	2019-07
Interest Rate Swap Three [Member]
Derivative [Line Items]
Date entered	2014-05
Notional amount	$ 50,000
Fixed interest rate paid	2.344%	[1]
Variable interest rate received	1-month LIBOR
Effective date	2015-10
Expiration date	2020-10
Interest Rate Swap Four [Member]
Derivative [Line Items]
Date entered	2014-05
Notional amount	$ 25,000
Fixed interest rate paid	2.326%	[1]
Variable interest rate received	1-month LIBOR
Effective date	2015-10
Expiration date	2020-10
Interest Rate Swap Five [Member]
Derivative [Line Items]
Date entered	2014-05
Notional amount	$ 50,000
Fixed interest rate paid	2.35%	[1]
Variable interest rate received	1-month LIBOR
Effective date	2015-10
Expiration date	2020-10
Interest Rate Swap Six [Member]
Derivative [Line Items]
Date entered	2014-05
Notional amount	$ 50,000
Fixed interest rate paid	2.35%	[1]
Variable interest rate received	1-month LIBOR
Effective date	2015-10
Expiration date	2020-10
Interest Rate Swap Seven [Member]
Derivative [Line Items]
Date entered	2016-04
Notional amount	$ 100,000
Fixed interest rate paid	1.00%	[1]
Variable interest rate received	1-month LIBOR
Effective date	2017-02
Expiration date	2020-02
Interest Rate Swap Eight [Member]
Derivative [Line Items]
Date entered	2016-06
Notional amount	$ 75,000
Fixed interest rate paid	0.85%	[1]
Variable interest rate received	1-month LIBOR
Effective date	2017-02
Expiration date	2020-02
Interest Rate Swap Nine [Member]
Derivative [Line Items]
Date entered	2016-06
Notional amount	$ 150,000
Fixed interest rate paid	0.95%	[1]
Variable interest rate received	1-month LIBOR
Effective date	2018-01
Expiration date	2021-01
Interest Rate Swap Ten [Member]
Derivative [Line Items]
Date entered	2016-06
Notional amount	$ 150,000
Fixed interest rate paid	0.95%	[1]
Variable interest rate received	1-month LIBOR
Effective date	2018-01
Expiration date	2021-01
Interest Rate Swap Eleven [Member]
Derivative [Line Items]
Date entered	2016-07
Notional amount	$ 50,000
Fixed interest rate paid	0.90%	[1]
Variable interest rate received	1-month LIBOR
Effective date	2018-01
Expiration date	2021-01
Interest Rate Swap Twelve [Member]
Derivative [Line Items]
Date entered	2016-07
Notional amount	$ 50,000
Fixed interest rate paid	0.89%	[1]
Variable interest rate received	1-month LIBOR
Effective date	2018-01
Expiration date	2021-01
[1]	Plus applicable margin.

Derivative Financial Instrume56

Derivative Financial Instruments (Company's Derivative Instruments of Fuel Hedge Agreements) (Details) - Fuel [Member]	9 Months Ended
	Sep. 30, 2016gal / M$ / gal
Fuel Hedge Agreement One [Member]
Derivative [Line Items]
Date entered	2015-05
Notional amount (in gallons per month) | gal / M	300,000
Diesel rate paid fixed (per gallon) | $ / gal	3.2800
Diesel rate received variable	DOE Diesel Fuel Index*	[1]
Effective date	2016-01
Expiration date	2017-12
Fuel Hedge Agreement Two [Member]
Derivative [Line Items]
Date entered	2015-05
Notional amount (in gallons per month) | gal / M	200,000
Diesel rate paid fixed (per gallon) | $ / gal	3.2750
Diesel rate received variable	DOE Diesel Fuel Index*	[1]
Effective date	2016-01
Expiration date	2017-12
Fuel Hedge Agreement Three [Member]
Derivative [Line Items]
Date entered	2016-07
Notional amount (in gallons per month) | gal / M	500,000
Diesel rate paid fixed (per gallon) | $ / gal	2.4988
Diesel rate received variable	DOE Diesel Fuel Index*	[1]
Effective date	2017-01
Expiration date	2017-12
Fuel Hedge Agreement Four [Member]
Derivative [Line Items]
Date entered	2016-07
Notional amount (in gallons per month) | gal / M	1,000,000
Diesel rate paid fixed (per gallon) | $ / gal	2.6345
Diesel rate received variable	DOE Diesel Fuel Index*	[1]
Effective date	2018-01
Expiration date	2018-12
[1]	If the national U.S. on-highway average price for a gallon of diesel fuel ("average price"), as published by the U.S. Department of Energy ("DOE"), exceeds the contract price per gallon, the Company receives the difference between the average price and the contract price (multiplied by the notional number of gallons) from the counterparty. If the average price is less than the contract price per gallon, the Company pays the difference to the counterparty.

Derivative Financial Instrume57

Derivative Financial Instruments (Fair Values of Derivative Instruments Designated as Cash Flow Hedges) (Details) - USD ($) $ in Thousands		Sep. 30, 2016		Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, asset derivatives		$ 12
Derivatives designated as cash flow hedges, liability derivatives		(15,598)		$ (19,645)
Interest Rate Swap [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, liability derivatives		(4,636)	[1]	(5,425)
Interest Rate Swap [Member] | Other Long-term Liabilities [Member}
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, liability derivatives		(7,009)		(4,320)
Fuel [Member] | Commodity Contract [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, liability derivatives		(3,953)	[2]	(5,699)
Fuel [Member] | Commodity Contract [Member] | Other Long-term Liabilities [Member}
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, liability derivatives				(4,201)
Fuel [Member] | Commodity Contract [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, asset derivatives
Fuel [Member] | Commodity Contract [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as cash flow hedges, asset derivatives	[2]	$ 12
[1]	Represents the estimated amount of the existing unrealized losses on interest rate swaps as of September 30, 2016 (based on the interest rate yield curve at that date), included in AOCL expected to be reclassified into pre-tax earnings within the next 12 months. The actual amounts reclassified into earnings are dependent on future movements in interest rates.
[2]	Represents the estimated amount of the existing unrealized losses on fuel hedges as of September 30, 2016 (based on the forward DOE diesel fuel index curve at that date), included in AOCL expected to be reclassified into pre-tax earnings within the next 12 months. The actual amounts reclassified into earnings are dependent on future movements in diesel fuel prices.

Derivative Financial Instrume58

Derivative Financial Instruments (Impact of Cash Flow Hedges on Results of Operations, Comprehensive Income and Accumulated Other Comprehensive Loss) (Details) - Cash Flow Hedging [Member] - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized as AOCL on derivatives, net of tax (effective portion)	[1]	$ 3,228	$ (6,825)	$ (3,055)	$ (10,913)
Amount of (gain) or loss reclassified from AOCL into earnings, net of tax (effective portion)	[2],[3]	2,064	1,186	6,193	3,270
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (gain) or loss reclassified from AOCL into earnings, net of tax (effective portion)	[2],[3]	1,234	645	3,338	1,929
Cost Of Operations [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (gain) or loss reclassified from AOCL into earnings, net of tax (effective portion)	[2],[3]	830	541	2,855	1,341
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized as AOCL on derivatives, net of tax (effective portion)	[1]	2,598	(3,786)	(3,896)	(6,528)
Fuel [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized as AOCL on derivatives, net of tax (effective portion)	[1]	$ 630	$ (3,039)	$ 841	$ (4,385)
[1]	In accordance with the derivatives and hedging guidance, the effective portions of the changes in fair values of interest rate swaps and fuel hedges have been recorded in equity as a component of AOCL. As the critical terms of the interest rate swaps match the underlying debt being hedged, no ineffectiveness is recognized on these swaps and, therefore, all unrealized changes in fair value are recorded in AOCL. Because changes in the actual price of diesel fuel and changes in the DOE index price do not offset exactly each reporting period, the Company assesses whether the fuel hedges are highly effective using the cumulative dollar offset approach.
[2]	Amounts reclassified from AOCL into earnings related to realized gains and losses on interest rate swaps are recognized when interest payments or receipts occur related to the swap contracts, which correspond to when interest payments are made on the Company's hedged debt.
[3]	Amounts reclassified from AOCL into earnings related to realized gains and losses on the fuel hedges are recognized when settlement payments or receipts occur related to the hedge contracts, which correspond to when the underlying fuel is consumed.

Fair Value of Financial Instr59

Fair Value of Financial Instruments (Carrying Values and Fair Values of Debt Instruments) (Detail) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Carrying value of senior notes		$ 3,680,316	$ 2,157,285
Senior Notes [Member] | 3.30% Senior Notes Due 2016 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes			100,000
Fair value of senior notes	[1]		$ 100,536
Interest rate of senior notes			3.30%
Senior note year due		2,016
Senior Notes [Member] | 4.00% Senior Notes Due 2018 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes		$ 50,000	$ 50,000
Fair value of senior notes	[1]	$ 52,061	$ 51,860
Interest rate of senior notes		4.00%	4.00%
Senior note year due		2,018
Senior Notes [Member] | 5.25% Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes		$ 175,000	$ 175,000
Fair value of senior notes	[1]	$ 193,707	$ 190,985
Interest rate of senior notes		5.25%	5.25%
Senior note year due		2,019
Senior Notes [Member] | 4.64% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes		$ 100,000	$ 100,000
Fair value of senior notes	[1]	$ 109,906	$ 107,613
Interest rate of senior notes		4.64%	4.64%
Senior note year due		2,021
Senior Notes [Member] | 2.39% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes		$ 150,000
Fair value of senior notes	[1]	$ 150,372
Interest rate of senior notes		2.39%
Senior note year due		2,021
Senior Notes [Member] | 3.09% Senior Notes Due 2022 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes		$ 125,000	$ 125,000
Fair value of senior notes	[1]	$ 129,017	$ 123,516
Interest rate of senior notes		3.09%	3.09%
Senior note year due		2,022
Senior Notes [Member] | 2.75% Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes		$ 200,000
Fair value of senior notes	[1]	$ 201,146
Interest rate of senior notes		2.75%
Senior note year due		2,023
Senior Notes [Member] | 3.41% Senior Notes Due 2025 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes		$ 375,000	$ 375,000
Fair value of senior notes	[1]	$ 392,507	$ 370,245
Interest rate of senior notes		3.41%	3.41%
Senior note year due		2,025
Senior Notes [Member] | 3.03% Senior Notes Due 2026 [Member]
Debt Instrument [Line Items]
Carrying value of senior notes		$ 400,000
Fair value of senior notes	[1]	$ 405,719
Interest rate of senior notes		3.03%
Senior note year due		2,026
[1]	Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value is based on quotes of bonds with similar ratings in similar industries.

Net Income (Loss) Per Share I60

Net Income (Loss) Per Share Information (Basic and Diluted Net Income Per Common Share) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator:
Net income (loss) attributable to Waste Connections for basic and diluted earnings per share	$ 88,617	$ (257,009)	$ 160,948	$ (147,825)
Denominator:
Basic shares outstanding	175,336,967	123,269,902	146,214,552	123,783,217
Dilutive effect of stock options and warrants	39,006		34,896
Dilutive effect of restricted stock units	390,786		460,332
Diluted shares outstanding	175,766,759	123,269,902	146,709,780	123,783,217

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Detail) - $ / gal	Sep. 30, 2016	Dec. 31, 2015
Fair Value [Abstract]
Minimum range of DOE index curve used in DCF model	2.45	2.21
Maximum range of DOE index curve used in DCF model	2.75	2.64
Weighted average DOE index curve used in DCF model	2.64	2.43

Fair Value Measurements (Assets

Fair Value Measurements (Assets and Liabilities Measured at Fair Value on Recurring Basis) (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted assets	$ 56,946	$ 46,148
Contingent consideration	(51,689)	(49,394)
Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instrument - net	(11,645)	(9,745)
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted assets	56,946	46,148
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instrument - net	(11,645)	(9,745)
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	(51,689)	(49,394)
Fuel [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instrument - net	(3,941)	(9,900)
Fuel [Member] | Fair Value, Inputs, Level 3 [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instrument - net	$ (3,941)	$ (9,900)

Fair Value Measurements (Change

Fair Value Measurements (Change in Fair Value for Level 3 Derivatives) (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Fair Value [Abstract]
Beginning balance	$ (9,900)	$ (1,979)
Realized losses included in earnings	4,616	2,165
Unrealized losses included in AOCL	1,343	(7,069)
Ending balance	$ (3,941)	$ (6,883)

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value for Level 3 Liabilities) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Fair Value [Abstract]
Beginning balance	$ 49,394	$ 70,165
Contingent consideration recorded at acquisition date	16,247	515
Payment of contingent consideration recorded at acquisition date	(12,105)	(190)
Payment of contingent consideration recorded in earnings	(413)
Adjustments to contingent consideration	(2,563)	(19,809)
Interest accretion expense	1,129	2,428
Ending balance	$ 51,689	$ 53,109

Other Comprehensive Income (L65

Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Components of Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment, gross	$ (16,642)		$ (3,991)
Other comprehensive income (loss), gross total	(9,068)	$ (9,042)	69	$ (12,293)
Income tax benefit related to items of other comprehensive loss	(2,282)	3,403	(922)	4,650
Amounts reclassified, net of tax			6,193	3,270
Changes in fair value, net of tax			(3,055)	(10,913)
Foreign currency translation adjustment, net	(16,642)		(3,991)
Other comprehensive income (loss), total, net of tax	(11,350)	(5,639)	(853)	(7,643)
Interest Rate Swap [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified, gross	1,678	1,041	5,081	3,114
Changes in fair value, gross	3,535	(6,066)	(6,980)	(10,503)
Amounts reclassified, tax effect	(444)	(396)	(1,743)	(1,185)
Changes in fair value, tax effect	(937)	2,280	3,084	3,975
Amounts reclassified, net of tax	1,234	645	3,338	1,929
Changes in fair value, net of tax	2,598	(3,786)	(3,896)	(6,528)
Fuel [Member] | Commodity Contract [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified, gross	1,342	874	4,616	2,165
Changes in fair value, gross	1,019	(4,891)	1,343	(7,069)
Amounts reclassified, tax effect	(512)	(333)	(1,761)	(824)
Changes in fair value, tax effect	(389)	1,852	(502)	2,684
Amounts reclassified, net of tax	830	541	2,855	1,341
Changes in fair value, net of tax	$ 630	$ (3,039)	$ 841	$ (4,385)

Other Comprehensive Income (L66

Other Comprehensive Income (Loss) (Amounts Included in Accumulated Other Comprehensive Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Components of Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ (12,171)	$ (5,593)
Amounts reclassified into earnings			6,193	3,270
Changes in fair value			(3,055)	(10,913)
Foreign currency translation adjustment	$ (16,642)		(3,991)
Ending balance	(13,024)	$ (13,236)	(13,024)	(13,236)
Foreign Currency Translation Adjustment [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment			(3,991)
Ending balance	(3,991)		(3,991)
Interest Rate Swap [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(6,037)	(4,372)
Amounts reclassified into earnings	1,234	645	3,338	1,929
Changes in fair value	2,598	(3,786)	(3,896)	(6,528)
Ending balance	(6,595)	(8,971)	(6,595)	(8,971)
Fuel [Member] | Commodity Contract [Member]
Components of Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(6,134)	(1,221)
Amounts reclassified into earnings	830	541	2,855	1,341
Changes in fair value	630	(3,039)	841	(4,385)
Ending balance	$ (2,438)	$ (4,265)	$ (2,438)	$ (4,265)

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Detail) - USD ($) $ / shares in Units, $ in Thousands	Oct. 26, 2016	Jul. 19, 2016	Jun. 02, 2016	Oct. 31, 2016	Oct. 31, 2015	Sep. 30, 2015	Jul. 31, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Jun. 01, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares held in trust													490,112
Shares sold										205,373
Shares issued								175,140,948		175,140,948	175,140,948			122,375,955
Preferred stock, shares issued								0		0	0
Other long-term liabilities						$ 1,061			$ 1,061			$ 1,061
Maximum number of shares authorized for repurchase		8,770,732
Period for stock repurchase program		1 year
Stock repurchase plan expiration date		Aug. 7, 2017
Daily repurchase of shares, maximum							60,150
Average daily trading volume during period							240,601
Repurchase of common stock (shares)											0	1,962,989
Aggregate cost of stock repurchased												$ 91,165
Shares of treasury stock												1,050,820
Treasury stock at cost												$ 49,458
Cash dividend per share					$ 0.145	$ 0.13		$ 0.145	$ 0.13		$ 0.435	$ 0.39
Cash dividend per common share, increase					$ 0.015
Cash dividends on common stock											$ 61,001	$ 48,246
Dividends per share amount								$ 0.145
Special Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued								0		0	0
Treasury Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of treasury stock												1,050,820
Treasury shares						1,050,820			1,050,820			1,050,820
Treasury stock at cost												$ 49,458
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant-date fair value of award											$ 57.46
Vested and unissued											27,362
Shares outstanding								839,043		839,043	839,043			1,007,301
Units granted in period											302,149
Units forfeited in period											40,419
Vested deferred RSUs outstanding						256,621		244,225	256,621	244,225	244,225	256,621
Restricted Stock Units (RSUs) [Member] | Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding								284,739		284,739	284,739		490,112
Vested and unissued			418,242							246,267
Other long-term liabilities													$ 25,925
Units vested in period										25,972
Restricted units vested in period										7,346
Units granted in period										0
Units forfeited in period										6,189
Units cash settled in period										205,373
Accelerated vesting in period										$ 3,420
Vesting in period										4,277
Unrecognized compensation cost, other than options								$ 2,831		2,831	$ 2,831
Fair value of share based compensation outstanding less unrecognized compensation expense								$ 18,276		$ 18,276	$ 18,276
Restricted Stock Units (RSUs) [Member] | Maximum [Member] | Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award										3 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant-date fair value of award											$ 56.75
Shares outstanding								284,762		284,762	284,762			293,413
Units granted in period											147,644
Units forfeited in period											33,335
Performance Shares [Member] | Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award											4 years
Performance Shares [Member] | Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding								81,888		81,888	81,888		206,856
Vested and unissued			38,409							59,173
Other long-term liabilities													$ 7,218
Units vested in period										75,282
Units granted in period										0
Units forfeited in period										0
Units cash settled in period										124,968
Accelerated vesting in period										$ 4,130
Vesting in period										1,952
Unrecognized compensation cost, other than options								$ 1,701		1,701	$ 1,701
Fair value of share based compensation outstanding less unrecognized compensation expense								4,433		$ 4,433	4,433
Performance Shares [Member] | Minimum [Member] | Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award										1 month
Performance Shares [Member] | Maximum [Member] | Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award										3 years
Employee Stock Option [Member] | Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other long-term liabilities													$ 13,022
Units vested in period										63,475
Accelerated vesting in period										$ 472
Fair value of share based compensation outstanding less unrecognized compensation expense								$ 16,817		$ 16,817	$ 16,817
Outstanding share based options								451,535		451,535	451,535		456,110
Outstanding options vested								403,789		403,789	403,789		325,045
Share based options vested in period										22,159
Options granted in period										0
Options forfeited in period										0
Options cash settled in period										4,575
Value of options vested in period										$ 3,449
Unrecognized compensation costs, options								$ 218		$ 218	$ 218
Employee Stock Option [Member] | Minimum [Member] | Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award										1 month
Employee Stock Option [Member] | Maximum [Member] | Progressive Waste Solutions Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of award										9 months
Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends, declared date				Oct. 26, 2016
Dividends per share amount	$ 0.18
Dividends, date to be paid				Nov. 21, 2016
Dividends, date of record				Nov. 7, 2016

Stockholders' Equity (Summary o

Stockholders' Equity (Summary of Activity Related to Restricted Stock Units) (Detail)	9 Months Ended
	Sep. 30, 2016shares
Restricted Stock Units (RSUs) [Member]
Unvested shares
Outstanding, shares at December 31, 2015	1,007,301
Granted	302,149
Forfeited	(40,419)
Vested and issued	(402,626)
Vested and unissued	(27,362)
Outstanding, shares at September 30, 2016	839,043
Performance Shares [Member]
Unvested shares
Outstanding, shares at December 31, 2015	293,413
Granted	147,644
Forfeited	(33,335)
Vested and issued	(122,960)
Outstanding, shares at September 30, 2016	284,762

Commitments and Contingencies (

Commitments and Contingencies (Narrative) (Detail) $ in Thousands	Dec. 02, 2014USD ($)
Commitments and Contingencies [Abstract]
Estimated clean up costs	$ 342,000

Subsequent Event (Details)

Subsequent Event (Details) - $ / shares	Oct. 26, 2016	Jul. 19, 2016	Oct. 31, 2016	Sep. 30, 2016
Subsequent Event [Line Items]
Period for stock repurchase program		1 year
Stock repurchase plan expiration date		Aug. 7, 2017
Dividends per share amount				$ 0.145
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends, declared date			Oct. 26, 2016
Dividends per share amount	$ 0.18
Increase in regular quarterly cash dividend per share	0.035
Dividends per share amount	$ 0.18
Dividends, date to be paid			Nov. 21, 2016
Dividends, date of record			Nov. 7, 2016