Westinghouse Air Brake Technologies (WAB) 10-Q 1 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 27, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Trading Symbol	WAB
Entity Registrant Name	WESTINGHOUSE AIR BRAKE TECHNOLOGIES CORP
Entity Central Index Key	943,452
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		95,999,248

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current Assets
Cash and cash equivalents	$ 228,080	$ 398,484
Accounts receivable	792,726	667,596
Unbilled accounts receivable	351,613	274,912
Inventories	764,781	658,510
Deposit in escrow	0	744,748
Other current assets	139,925	123,381
Total current assets	2,277,125	2,867,631
Property, plant and equipment	988,223	912,230
Accumulated depreciation	(437,856)	(393,854)
Property, plant and equipment, net	550,367	518,376
Other Assets
Goodwill	2,384,758	2,078,765
Other intangibles, net	1,140,387	1,053,860
Other noncurrent assets	97,013	62,386
Total other assets	3,622,158	3,195,011
Total Assets	6,449,650	6,581,018
Current Liabilities
Accounts payable	512,905	530,211
Customer deposits	373,815	256,591
Accrued compensation	151,952	145,324
Accrued warranty	134,964	123,190
Current portion of long-term debt	49,748	129,809
Other accrued liabilities	242,056	261,514
Total current liabilities	1,465,440	1,446,639
Long-term debt	1,824,156	1,762,967
Accrued postretirement and pension benefits	108,182	110,597
Deferred income taxes	282,557	245,680
Accrued warranty	13,800	15,802
Other long-term liabilities	19,146	22,508
Total Liabilities	3,713,281	3,604,193
Commitments and contingent liabilities
Equity
Preferred stock, 1,000,000 shares authorized, no shares issued	0	0
Common stock, $0.01 par value; 200,000,000 shares authorized: 132,349,534 shares issued and 95,999,582 and 95,425,432 outstanding at September 30, 2017 and December 31, 2016, respectively	1,323	1,323
Additional paid-in capital	900,536	869,951
Treasury stock, at cost, 36,349,952 and 36,924,102 shares, at September 30, 2017 and December 31, 2016, respectively	(828,103)	(838,950)
Retained earnings	2,735,876	2,553,258
Accumulated other comprehensive loss	(91,930)	(379,605)
Total Westinghouse Air Brake Technologies Corporation shareholders' equity	2,717,702	2,205,977
Noncontrolling interest	18,667	770,848
Total Equity	2,736,369	2,976,825
Total Liabilities and Equity	$ 6,449,650	$ 6,581,018

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	132,349,534	132,349,534
Common stock, shares outstanding (in shares)	95,999,582	95,425,432
Treasury stock, shares (in shares)	36,349,952	36,924,102

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Net sales	$ 957,931	$ 675,574	$ 2,806,218	$ 2,171,206
Cost of sales	(704,728)	(463,093)	(2,009,345)	(1,466,156)
Gross profit	253,203	212,481	796,873	705,050
Selling, general and administrative expenses	(117,838)	(70,757)	(367,753)	(241,118)
Engineering expenses	(24,709)	(16,289)	(71,511)	(52,271)
Amortization expense	(8,645)	(5,339)	(27,039)	(16,100)
Total operating expenses	(151,192)	(92,385)	(466,303)	(309,489)
Income from operations	102,011	120,096	330,570	395,561
Other income and expenses
Interest expense, net	(17,893)	(6,057)	(51,025)	(15,897)
Other income (expense), net	(2,933)	1,188	(2,166)	113
Income from operations before income taxes	81,185	115,227	277,379	379,777
Income tax expense	(12,746)	(32,799)	(64,776)	(112,701)
Net income	68,439	82,428	212,603	267,076
Less: Net (Gain) Loss attributable to noncontrolling interest	(1,040)	0	710	0
Net income attributable to Wabtec shareholders	$ 67,399	$ 82,428	$ 213,313	$ 267,076
Basic
Net income attributable to Wabtec shareholders (in dollars per share)	$ 0.70	$ 0.92	$ 2.23	$ 2.94
Diluted
Net income attributable to Wabtec shareholders (in dollars per share)	$ 0.70	$ 0.91	$ 2.22	$ 2.92
Weighted average shares outstanding
Basic (in shares)	95,709	89,589	95,163	90,546
Diluted (in shares)	96,316	90,293	95,808	91,316

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income attributable to Wabtec shareholders	$ 67,399	$ 82,428	$ 213,313	$ 267,076
Foreign currency translation gain (loss)	82,905	2,734	277,984	(7,385)
Unrealized gain (loss) on derivative contracts	15,021	1,169	18,400	(1,740)
Unrealized gain (loss) on pension benefit plans and post-retirement benefit plans	27	982	(3,017)	(652)
Other comprehensive income (loss) before tax	97,953	4,885	293,367	(9,777)
Income tax (expense) benefit related to components of other comprehensive income	(5,333)	(594)	(5,692)	441
Other comprehensive income (loss), net of tax	92,620	4,291	287,675	(9,336)
Comprehensive income attributable to Wabtec shareholders	$ 160,019	$ 86,719	$ 500,988	$ 257,740

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating Activities
Net income	$ 212,603	$ 267,076
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization	76,970	49,375
Stock-based compensation expense	14,539	14,788
Loss on disposal of property, plant and equipment	1,633	151
Excess income tax benefits from exercise of stock options	0	(446)
Changes in operating assets and liabilities, net of acquisitions
Accounts receivable and unbilled accounts receivable	(60,246)	(38,362)
Inventories	(53,365)	2,301
Accounts payable	(121,389)	(43,777)
Accrued income taxes	(35,942)	5,952
Accrued liabilities and customer deposits	81,270	(8,353)
Other assets and liabilities	(89,562)	(1,812)
Net cash provided by operating activities	26,511	246,893
Investing Activities
Purchase of property, plant and equipment	(60,263)	(31,676)
Proceeds from disposal of property, plant and equipment	1,066	140
Acquisitions of businesses, net of cash acquired	(114,175)	(84,355)
Release of deposit in escrow	23,548	0
Net cash used for investing activities	(149,824)	(115,891)
Financing Activities
Proceeds from debt	883,473	346,000
Payments of debt	(918,919)	(215,850)
Purchase of treasury stock	0	(212,176)
Proceeds from exercise of stock options and other benefit plans	2,888	1,773
Payment of income tax withholding on share-based compensation	(6,798)	(9,006)
Excess income tax benefits from exercise of equity options	0	446
Cash dividends ($0.32 and $0.26 per share for the nine months ended September 30, 2017 and 2016, respectively)	(30,693)	(23,523)
Net cash used for financing activities	(70,049)	(112,336)
Effect of changes in currency exchange rates	22,958	5,525
(Decrease) Increase in cash	(170,404)	24,191
Cash, beginning of period	398,484	226,191
Cash, end of period	$ 228,080	$ 250,382

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Cash Flows [Abstract]
Cash dividends, per share (in dollars per share)	$ 0.32	$ 0.26

Business

Business	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	BUSINESS Westinghouse Air Brake Technologies Corporation (“Wabtec” or the "Company") is one of the world’s largest providers of value-added, technology-based products and services for the global rail industry. Our products are found on virtually all U.S. locomotives, freight cars and passenger transit vehicles, as well as in more than 100 countries throughout the world. Our products enhance safety, improve productivity and reduce maintenance costs for customers, and many of our core products and services are essential in the safe and efficient operation of freight rail and passenger transit vehicles. Wabtec is a global company with operations in 31 countries. In the first nine months of 2017 , approximately 65% of the Company’s revenues came from customers outside the United States.

Accounting Policies

Accounting Policies	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Accounting Policies	ACCOUNTING POLICIES Basis of Presentation The unaudited condensed consolidated interim financial statements have been prepared in accordance with generally accepted accounting principles ("GAAP") in the United States of America and the rules and regulations of the Securities and Exchange Commission and include the accounts of Wabtec and its subsidiaries in which Wabtec has a controlling interest. These condensed consolidated interim financial statements do not include all of the information and footnotes required for complete financial statements. In management’s opinion, these financial statements reflect all adjustments of a normal, recurring nature necessary for a fair presentation of the results for the interim periods presented. Results for these interim periods are not necessarily indicative of results to be expected for the full year. The Company operates on a four-four-five week accounting quarter, and the quarters end on or about March 31, June 30, September 30, and December 31. The notes included herein should be read in conjunction with the audited consolidated financial statements included in Wabtec’s Annual Report on Form 10-K for the year ended December 31, 2016 . The December 31, 2016 information has been derived from the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 . Revenue Recognition Revenue is recognized in accordance with Accounting Standards Codification (“ASC”) 605 “Revenue Recognition.” Revenue is recognized when products have been shipped to the respective customers, title has passed and the price for the product has been determined. In general, the Company recognizes revenue from long-term contracts based on the percentage of completion method of accounting. The units-of-delivery method or other input-based or output-based measures, as appropriate, are used to measure the progress toward completion of individual contracts. Contract revenues and cost estimates are reviewed and revised quarterly at a minimum and adjustments are reflected in the accounting period as such amounts are determined. Provisions are made currently for estimated losses on uncompleted contracts. Unbilled accounts receivables were $351.6 million and $274.9 million , customer deposits were $373.8 million and $256.6 million , and provisions for loss contracts were $93.8 million and $60.5 million at September 30, 2017 and December 31, 2016 , respectively. Pre-Production Costs Certain pre-production costs relating to long-term production and supply contracts have been deferred and will be recognized over the life of the contracts. Deferred pre-production costs were $28.8 million and $29.4 million at September 30, 2017 and December 31, 2016 , respectively. Reclassifications Certain prior year amounts have been reclassified, where necessary, to conform to the current year presentation. Refer to Recently Adopted Accounting Pronouncements below. Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles in the United States requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting period. Actual amounts could differ from the estimates. On an ongoing basis, management reviews its estimates based on currently available information. Changes in facts and circumstances may result in revised estimates. Financial Derivatives and Hedging Activities As part of its risk management strategy, the Company utilizes derivative financial instruments to manage its exposure due to changes in foreign currencies and interest rates. For further information regarding financial derivatives and hedging activities, refer to Footnotes 12 and 13. Foreign Currency Translation Assets and liabilities of foreign subsidiaries, except for the Company’s Mexican operations whose functional currency is the U.S. Dollar, are translated at the rate of exchange in effect on the balance sheet date while income and expenses are translated at the average rates of exchange prevailing during the period. Foreign currency gains and losses resulting from transactions and the translation of financial statements are recorded in the Company’s consolidated financial statements based upon the provisions of ASC 830 “Foreign Currency Matters.” The effects of currency exchange rate changes on intercompany transactions and balances of a long-term investment nature are accumulated and carried as a component of accumulated other comprehensive loss. The effects of currency exchange rate changes on intercompany transactions that are denominated in a currency other than an entity’s functional currency are charged or credited to earnings. Noncontrolling Interests In accordance with ASC 810 "Consolidation", the Company has classified noncontrolling interests as equity on the condensed consolidated balance sheets as of September 30, 2017 and December 31, 2016 . Net income attributable to noncontrolling interests for the three and nine months ended September 30, 2017 was a $1.0 million gain and a $0.7 million loss, respectively, and was not material for the three and nine months ended September 30, 2016 . Other comprehensive income attributable to noncontrolling interests for the three and nine months ended September 30, 2017 and 2016 was not material. Recently Issued Accounting Pronouncements In March 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2017-07 "Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost". The amendments in this update require the service cost component of net benefit costs to be reported in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit costs are required to be presented in the income statement separately from the service cost component and outside income from operations. This update also allows the service cost component to be eligible for capitalization when applicable. The ASU is effective for public companies in the fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption was permitted as of the beginning of an annual period. The amendments should be applied retrospectively for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the income statement and prospectively for the capitalization of the service cost component of net periodic pension cost and net periodic postretirement benefit in assets. The Company does not expect the adoption of this guidance in 2018 to have a material impact on the Company's financial statements. In January 2017, the FASB issued ASU No. 2017-04 "Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment". The amendments in this update eliminate the requirement to perform Step 2 of the goodwill impairment test. Instead, an entity should perform a goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value up to the carrying amount of the goodwill. The ASU is effective for public companies in the fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted. The impact of adopting this guidance could result in a change in the overall conclusion as to whether or not a reporting units' goodwill is impaired and the amount of an impairment charge recognized in the event a reporting units' carrying value exceeds its fair value. All of the Company's reporting units had fair values that were substantially greater than the carrying value as of the Company's last quantitative goodwill impairment test, which was performed as of October 1, 2016. In November 2016, the FASB issued ASU No. 2016-18 "Statement of Cash Flows (Topic 230): Restricted Cash". The amendments in this update require a statement of cash flows to explain the change during the period in total cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The ASU is effective for public companies in the fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the potential impact of adopting this guidance on its consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 814)" which requires lessees to recognize a right of use asset and lease liability on the balance sheet for all leases with terms longer than 12 months. For leases with terms less than 12 months, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize a right of use asset and lease liability. The ASU is effective for public companies in the fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company is currently evaluating the potential impact of adopting this guidance on its consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contract with Customers.” The ASU will supersede most of the existing revenue recognition requirements in U.S. GAAP and will require entities to recognize revenue at an amount that reflects the consideration to which the Company expects to be entitled in exchange for transferring goods or services to a customer. The new standard also requires significantly expanded disclosures regarding the qualitative and quantitative information of an entity’s nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The Board voted to propose that the standard would take effect for reporting periods beginning after December 15, 2017 and that early adoption would be allowed as of the original effective date. The impact of adopting the new standard on net sales and operating income for the three and nine months ended September 30, 2017 and 2016 is not expected to be material. The Company also does not expect a material impact to the consolidated balance sheet. The impact to results is not anticipated to be material because the analysis of the Company's current contracts under the new revenue recognition standard supports how the Company is currently recognizing revenue over time and at a point in time; however, the Company's conclusions may evolve as management completes its contract reviews and evaluation. The Company plans to adopt this accounting standard update using the modified retrospective method, with the cumulative effect of initially applying this update recognized in the first reporting period of 2018. The Company is in the process of drafting an updated accounting policy, evaluating new disclosure requirements and identifying and implementing appropriate changes to its business processes, systems and controls to support recognition and disclosure under the new guidance. The Company believes it is following an appropriate timeline to appropriately adopt this new standard on January 1, 2018. Recently Adopted Accounting Pronouncements In March 2016, the FASB issued ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting”. The ASU simplifies several aspects for the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The ASU became effective for public companies during interim and annual reporting periods beginning after December 15, 2016. In accordance with this update, the Company began recognizing all excess tax deficiencies and tax benefits from share-based payment awards as a benefit or expense to income tax in the income statement. This update has been adopted prospectively in accordance with the ASU and the impact of adoption on the income statement was not material. Additionally in accordance with this update, the Company began classifying excess income tax benefits from exercise of stock options as an operating activity on the consolidated statement of cash flows. The Company elected to adopt this amendment retrospectively and the impact of the adoption on operating and financing cash flows for the three and nine months ended September 30, 2016 was not material. In November 2015, the FASB issued ASU No. 2015-17, "Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes" which simplifies the presentation of deferred income taxes by requiring deferred tax assets and liabilities to be classified as noncurrent on the balance sheet. The Company elected to early adopt this ASU as of December 31, 2016; therefore, all deferred income tax assets and liabilities are classified in the noncurrent deferred income taxes line-items on the consolidated balance sheets. Other Comprehensive Income Comprehensive income comprises both net income and the change in equity from transactions and other events and circumstances from nonowner sources. The changes in accumulated other comprehensive loss by component, net of tax, for the nine months ended September 30, 2017 are as follows: In thousands Foreign currency translation Derivative contracts Pension and post retirement benefit plans Total Balance at December 31, 2016 $ (321,033 ) $ (2,957 ) $ (55,615 ) $ (379,605 ) Other comprehensive income (loss) before reclassifications 277,984 11,424 (4,715 ) 284,693 Amounts reclassified from accumulated other comprehensive income — 1,206 1,776 2,982 Net current period other comprehensive income (loss) 277,984 12,630 (2,939 ) 287,675 Balance at September 30, 2017 $ (43,049 ) $ 9,673 $ (58,554 ) $ (91,930 ) Reclassifications out of accumulated other comprehensive loss for the three months ended September 30, 2017 are as follows: In thousands Amount reclassified from accumulated other comprehensive income Affected line item in the Condensed Consolidated Statements of Income Amortization of defined pension and post retirement items Amortization of initial net obligation and prior service cost $ (422 ) Cost of sales Amortization of net loss 1,240 Cost of sales 818 Income from Operations (226 ) Income tax expense $ 592 Net income Derivative contracts Realized loss on derivative contracts $ 497 Interest expense, net (131 ) Income tax expense $ 366 Net income Reclassifications out of accumulated other comprehensive loss for the nine months ended September 30, 2017 are as follows: In thousands Amount reclassified from accumulated other comprehensive income Affected line item in the Condensed Consolidated Statements of Income Amortization of defined pension and post retirement items Amortization of initial net obligation and prior service cost $ (1,266 ) Cost of sales Amortization of net loss 3,720 Cost of sales 2,454 Income from Operations (678 ) Income tax expense $ 1,776 Net income Derivative contracts Realized loss on derivative contracts $ 1,653 Interest expense, net (447 ) Income tax expense $ 1,206 Net income The changes in accumulated other comprehensive loss by component, net of tax, for the nine months ended September 30, 2016 are as follows: Foreign Derivative Pension and Total Balance at December 31, 2015 $ (227,349 ) $ (2,987 ) $ (46,383 ) $ (276,719 ) Other comprehensive income (loss) before reclassifications (7,385 ) (2,192 ) (1,969 ) (11,546 ) Amounts reclassified from accumulated other comprehensive income — 883 1,327 2,210 Net current period other comprehensive (loss) (7,385 ) (1,309 ) (642 ) (9,336 ) Balance at September 30, 2016 $ (234,734 ) $ (4,296 ) $ (47,025 ) $ (286,055 ) Reclassifications out of accumulated other comprehensive loss for the three months ended September 30, 2016 are as follows: In thousands Amount reclassified from Affected line item in the Amortization of defined pension and post retirement items Amortization of initial net obligation and prior service cost $ 6 Cost of sales Amortization of net loss 611 Cost of sales 617 Income from Operations (175 ) Income tax expense $ 442 Net income Derivative contracts Realized loss on derivative contracts $ 338 Interest expense, net (96 ) Income tax expense $ 242 Net income Reclassifications out of accumulated other comprehensive loss for the nine months ended September 30, 2016 are as follows: In thousands Amount reclassified from Affected line item in the Amortization of defined pension and post retirement items Amortization of initial net obligation and prior service cost $ (801 ) Cost of sales Amortization of net loss 2,702 Cost of sales 1,901 Income from Operations (574 ) Income tax expense $ 1,327 Net income Derivative contracts Realized loss on derivative contracts $ 1,265 Interest expense, net (382 ) Income tax expense $ 883 Net income

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Acquisitions	ACQUISITIONS Faiveley Transport On November 30, 2016, the Company acquired majority ownership of Faiveley Transport S.A. (“Faiveley Transport”) under the terms of a Share Purchase Agreement (“Share Purchase Agreement”). Faiveley Transport is a leading global provider of value-added, integrated systems and services for the railway industry with annual sales of about $1.2 billion and more than 5,700 employees in 24 countries. Faiveley Transport supplies railway manufacturers, operators and maintenance providers with a range of value-added, technology-based systems and services in Energy & Comfort (air conditioning, power collectors and converters, and passenger information), Access & Mobility (passenger access systems and platform doors), and Brakes and Safety (braking systems and couplers). The transaction was structured as a step acquisition as follows: • On November 30, 2016, the Company acquired majority ownership of Faiveley Transport, after completing the purchase of the Faiveley family’s ownership interest under the terms of the Share Purchase Agreement, which directed the Company to pay €100 per share of Faiveley Transport, payable between 25% and 45% in cash at the election of those shareholders and the remainder payable in Wabtec stock. The Faiveley family’s ownership interest acquired by the Company represented approximately 51% of outstanding share capital and approximately 49% of the outstanding voting shares of Faiveley Transport. Upon completion of the share purchase under the Share Purchase Agreement, Wabtec commenced a tender offer for the remaining publicly traded Faiveley Transport shares. The public shareholders had the option to elect to receive €100 per share in cash or 1.1538 shares of Wabtec common stock per share of Faiveley Transport. The common stock portion of the consideration was subject to a cap on issuance of Wabtec common shares that was equivalent to the rates of cash and stock elected by the 51% owners. • On February 3, 2017, the initial cash tender offer was closed, which resulted in the Company acquiring approximately 27% of additional outstanding share capital and voting rights of Faiveley Transport for approximately $411.8 million in cash and $25.2 million in Wabtec stock. After the initial cash tender offer, the Company owned approximately 78% of outstanding share capital and 76% of voting rights. • On March 6, 2017, the final cash tender offer was closed, which resulted in the Company acquiring approximately 21% of additional outstanding share capital and 22% of additional outstanding voting rights of Faiveley Transport for approximately $303.2 million in cash and $0.3 million in Wabtec stock. After the final cash tender offer, the Company owned approximately 99% of the share capital and 98% of the voting rights of Faiveley Transport. • On March 21, 2017, a mandatory squeeze-out procedure was finalized, which resulted in the Company acquiring the Faiveley Transport shares not tendered in the offers for approximately $17.5 million in cash. This resulted in the Company owning 100% of the share capital and voting rights of Faiveley Transport. As of November 30, 2016, the date the Company acquired 51% of the share capital and 49% of the voting interest in Faiveley Transport, Faiveley Transport was consolidated under the variable interest entity model as the Company concluded that it was the primary beneficiary of Faiveley Transport as it then possessed the power to direct the activities of Faiveley Transport that most significantly impact its economic performance and it then possessed the obligation and right to absorb losses and benefits from Faiveley Transport. The aggregate value of consideration paid for 100% ownership of Faiveley Transport was $1,736.1 million including $944.3 million in cash, $560.2 million in stock or approximately 6.6 million shares, $409.9 million in debt assumed, less $178.3 million in cash acquired. The $744.7 million included as deposits in escrow on the consolidated balance sheet at December 31, 2016 was cash designated for use as consideration for the tender offers. The fair values of the assets acquired and liabilities assumed are preliminarily determined using the income, cost and market approaches. The fair value measurements were primarily based on significant inputs that are not observable in the market and are considered Level 3. The December 31, 2016 consolidated balance sheet includes the assets and liabilities of Faiveley Transport, which have been measured at fair value. The fair value of the noncontrolling interest was preliminarily determined using the market price of Faiveley Transport’s publicly traded common stock multiplied by the number of publicly traded common shares outstanding at the acquisition date and is considered Level 1. The acquisition of the noncontrolling interest in the three months ended March 31, 2017 resulted in a $8.9 million increase to additional paid-in capital on the consolidated balance sheet which represents the difference in consideration paid to acquire the noncontrolling interest and the carrying value of noncontrolling interest at acquisition. The following table summarizes the preliminary estimated fair values of the Faiveley Transport assets acquired and liabilities assumed: In thousands Assets acquired Cash and cash equivalents $ 178,318 Accounts receivable 444,741 Inventories 205,649 Other current assets 70,930 Property, plant, and equipment 148,746 Goodwill 1,257,360 Trade names 346,328 Customer relationships 233,529 Patents 1,201 Other noncurrent assets 183,252 Total assets acquired 3,070,054 Liabilities assumed Current liabilities 805,992 Debt 409,899 Other noncurrent liabilities 347,348 Total liabilities assumed 1,563,239 Net assets acquired $ 1,506,815 These estimates are preliminary in nature and subject to adjustments, which could be material. Any necessary adjustments will be finalized within one year from the date of acquisition. During the nine months ended September 30, 2017 , the estimated fair values for customer relationships and current liabilities were adjusted by $21.8 million and $51.8 million , respectively, for changes to initial estimates based on information that existed at the date of acquisition. Additionally, the estimated fair values for accounts receivable and current liabilities were adjusted by $2.8 million and $36.2 million , respectively, to correct errors in the preliminary estimated fair values of the Faiveley Transport assets acquired and liabilities assumed. Other noncurrent assets were adjusted by $29.0 million to record the deferred tax impact of these adjustments. As a result of these adjustments and other immaterial adjustments related to changes to initial estimates based on information that existed at the date of acquisition, goodwill increased by $69.1 million . Accounts receivable and current liabilities were adjusted by $64.3 million to correct an error in the preliminary estimated fair values of Faiveley Transport assets and liabilities assumed related to a factoring arrangement with recourse. Substantially all of the accounts receivable acquired are expected to be collectible. Included in current liabilities is $25.9 million of accrued compensation for acquired share-based stock plans that are obligated to be settled in cash. Contingent liabilities assumed as part of the transaction were not material. These contingent liabilities are related to contract disputes, environmental, legal and tax matters. Contingent liabilities are recorded at fair value in purchase accounting, aside from those pertaining to uncertainty in income taxes which is an exception to the fair value basis of accounting. Goodwill was calculated as the difference between the acquisition date fair value of the consideration transferred and the fair value of the net assets acquired, and represents the future economic benefits, including synergies and assembled workforce, the Company expects to achieve as a result of the acquisition. Purchased goodwill is not expected to be deductible for tax purposes. The goodwill has been preliminarily allocated to the Transit segment. For the three and nine months ended September 30, 2017 , the Company’s consolidated statement of income included $294.4 million and $851.8 million of revenues, respectively, from Faiveley Transport. Other Acquisitions The Company has made the following acquisitions operating as a business unit or component of a business unit in the Freight Segment: • On April 5, 2017 , the Company acquired Thermal Transfer Corporation ("TTC"), a leading provider of heat transfer solutions for industrial applications, for a purchase price of approximately $32.5 million , net of cash acquired, resulting in preliminary goodwill of $16.3 million , all of which will be deductible for tax purposes. • On March 14, 2017 , the Company acquired Aero Transportation Products ("ATP"), a manufacturer of engineered covering systems for hopper freight cars, for a purchase price of approximately $65.3 million , net of cash acquired, resulting in preliminary goodwill of $31.9 million , all of which will be deductible for tax purposes. • On December 14, 2016 , the Company acquired Workhorse Rail LLC ("Workhorse"), a supplier of engineered freight car components mainly for the aftermarket, for a purchase price of approximately $43.8 million , net of cash acquired, resulting in preliminary goodwill of $24.4 million , 37.8% of which will be deductible for tax purposes. • On November 17, 2016 , the Company acquired the assets of Precision Turbo & Engine ("Precision Turbo"), a designer and manufacturer of high-performance, aftermarket turbochargers, wastegates, and heat exchangers for the automotive performance market, for a purchase price of approximately $13.8 million , net of cash acquired, resulting in preliminary goodwill of $4.0 million , all of which will be deductible for tax purposes. • On May 5, 2016 , the Company acquired Unitrac Railroad Materials ("Unitrac"), a leading designer and manufacturer of railroad products and track work services, for a purchase price of approximately $14.8 million , net of cash acquired, resulting in goodwill of $2.4 million , all of which will be deductible for tax purposes. The Company has made the following acquisitions operating as a business unit or component of a business unit in the Transit Segment: • On October 2, 2017 , subsequent to the close of our accounting quarter, the Company acquired AM General Contractor ("AM"), a manufacturer of safety systems, mainly for transit rail cars with annual sales of about $25.0 million . • On August 1, 2016 , the Company acquired Gerken Group SA ("Gerken"), a manufacturer of specialty carbon and graphite products for rail and other industrial applications, for a purchase price of approximately $62.8 million , net of cash acquired, resulting in goodwill of $17.5 million , none of which will be deductible for tax purposes. The acquisitions listed above include escrow deposits of $38.4 million , which act as security for indemnity and other claims in accordance with the purchase and related escrow agreements. The following table summarizes the preliminary estimated fair values of the assets acquired and liabilities assumed at the date of the acquisition for TTC, ATP, Workhorse, and Precision Turbo. For the Unitrac and Gerken acquisitions, the following table summarizes the final fair value of the assets acquired and liabilities assumed at the date of acquisition. TTC ATP Workhorse Precision Turbo Gerken Unitrac In thousands April 5, March 14, December 14, November 17, August 1, May 5, Current assets $ 3,746 $ 11,666 $ 9,137 $ 4,145 $ 32,706 $ 11,476 Property, plant & equipment 5,909 5,354 — 1,346 7,667 1,768 Goodwill 16,309 31,934 24,373 4,019 17,470 2,442 Other intangible assets 12,300 22,100 19,400 5,200 30,560 1,230 Other assets — — — — 1,706 — Total assets acquired 38,264 71,054 52,910 14,710 90,109 16,916 Total liabilities assumed (5,753 ) (5,800 ) (9,083 ) (884 ) (27,262 ) (2,145 ) Net assets acquired $ 32,511 $ 65,254 $ 43,827 $ 13,826 $ 62,847 $ 14,771 Of the $671.8 million of total acquired other intangible assets, $367.6 million was assigned to trade names, $296.7 million was assigned to customer relationships, and $5.0 million was assigned to intellectual property. The trade names were determined to have indefinite useful lives, while the intellectual property and customer relationships’ average useful lives are 20 years , and the non-compete agreements' useful life is five years . The Company also made smaller acquisitions not listed above which are individually and collectively immaterial. The following unaudited pro forma consolidated financial information presents income statement results as if the acquisitions listed above had occurred on January 1, 2016: In thousands Three Months Ended Three Months Ended Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 Net sales $ 957,931 $ 995,869 $ 2,817,550 $ 3,168,195 Gross profit 253,203 301,554 799,695 977,743 Net income attributable to Wabtec shareholders 67,399 99,085 214,370 323,878 Diluted earnings per share As Reported $ 0.70 $ 0.91 $ 2.22 $ 2.92 Pro forma $ 0.70 $ 1.02 $ 2.23 $ 3.30

Inventories

Inventories	9 Months Ended
	Sep. 30, 2017
Inventory Disclosure [Abstract]
Inventories	INVENTORIES The components of inventory, net of reserves, were: In thousands September 30, December 31, Raw materials $ 391,207 $ 331,465 Work-in-progress 196,319 145,462 Finished goods 177,255 181,583 Total inventories $ 764,781 $ 658,510

Intangibles

Intangibles	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Intangibles	INTANGIBLES The change in the carrying amount of goodwill by segment for the nine months ended September 30, 2017 is as follows: In thousands Freight Segment Transit Segment Total Balance at December 31, 2016 $ 550,902 $ 1,527,863 $ 2,078,765 Adjustment to preliminary purchase allocation (13,395 ) 77,302 63,907 Acquisitions 62,158 4,999 67,157 Foreign currency impact 9,407 165,522 174,929 Balance at September 30, 2017 $ 609,072 $ 1,775,686 $ 2,384,758 As of September 30, 2017 and December 31, 2016 , the Company’s trade names had a net carrying amount of $583.7 million and $510.5 million , respectively, and the Company believes these intangibles have indefinite lives. Intangible assets of the Company, other than goodwill and trade names, consist of the following: In thousands September 30, December 31, Patents, non-compete and other intangibles, net of accumulated amortization of $42,237 and $42,538 $ 15,001 $ 15,360 Customer relationships, net of accumulated amortization of $117,676 and $87,334 541,705 528,068 Total $ 556,706 $ 543,428 The weighted average remaining useful life of patents, customer relationships and other intangibles were 10 years , 17 years and 15 years , respectively. Amortization expense for intangible assets was $8.6 million and $27.0 million for the three and nine months ended September 30, 2017 , and $5.3 million and $16.1 million for the three and nine months ended September 30, 2016 , respectively. Amortization expense for the five succeeding years is estimated to be as follows: Remainder of 2017 $ 8,873 2018 34,794 2019 33,537 2020 32,014 2021 31,827

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Long-Term Debt	LONG-TERM DEBT Long-term debt consisted of the following: In thousands September 30, December 31, 3.45% Senior Notes, due 2026, net of unamortized debt $ 747,590 $ 747,474 4.375% Senior Notes, due 2023, net of unamortized 248,502 248,310 Revolving Credit Facility, net of unamortized 855,321 796,150 Schuldschein Loan 11,812 98,671 Other Borrowings 9,150 1,153 Capital Leases 1,529 1,018 Total 1,873,904 1,892,776 Less - current portion 49,748 129,809 Long-term portion $ 1,824,156 $ 1,762,967 Wabtec's acquisition of the controlling stake of Faiveley Transport triggered the early repayment of a syndicated loan and the mandatory offer to investors to repay the U.S. and Schuldschein private placements. Both the syndicated loan and U.S. private placements were repaid in full in December 2016. 3.45% Senior Notes Due November 2026 On November 3 2016, the Company issued $750.0 million of Senior Notes due in 2026 (the "2016 Notes"). The 2016 Notes were issued at 99.965% of face value. Interest on the 2016 Notes accrues at a rate of 3.45% per annum and is payable semi-annually on May 15 and November 15 of each year. The proceeds were used to finance the cash portion of the Faiveley Transport acquisition, refinance Faiveley Transport's indebtedness, and for general corporate purposes. The principal balance is due in full at maturity. The Company incurred $2.7 million of deferred financing costs related to the issuance of the 2016 Notes. The 2016 Notes are senior unsecured obligations of the Company and rank pari passu with all existing and future senior debt and senior to all existing and future subordinated indebtedness of the Company. The indenture under which the 2016 Notes were issued contains covenants and restrictions which limit among other things, the following: the incurrence of indebtedness, payment of dividends and certain distributions, sale of assets, change in control, mergers and consolidations and the incurrence of liens. The Company is in compliance with the restrictions and covenants in the indenture under which the 2016 Notes were issued and expects that these restrictions and covenants will not be any type of limiting factor in executing our operating activities. 4.375% Senior Notes Due August 2023 In August 2013 , the Company issued $250.0 million of Senior Notes due in 2023 (the “2013 Notes”). The 2013 Notes were issued at 99.879% of face value. Interest on the 2013 Notes accrues at a rate of 4.375% per annum and is payable semi-annually on February 15 and August 15 of each year. The proceeds were used to repay debt outstanding under the Company’s existing credit agreement, and for general corporate purposes. The principal balance is due in full at maturity. The Company incurred $2.6 million of deferred financing costs related to the issuance of the 2013 Notes. The 2013 Notes are senior unsecured obligations of the Company and rank pari passu with all existing and future senior debt and senior to all existing and future subordinated indebtedness of the Company. The indenture under which the 2013 Notes were issued contains covenants and restrictions which limit among other things, the following: the incurrence of indebtedness, payment of dividends and certain distributions, sale of assets, change in control, mergers and consolidations and the incurrence of liens. The Company is in compliance with the restrictions and covenants in the indenture under which the 2013 Notes were issued and expects that these restrictions and covenants will not be any type of limiting factor in executing our operating activities. 2016 Refinancing Credit Agreement On June 22, 2016 , the Company amended and restated its existing revolving credit facility with a consortium of commercial banks. The “2016 Refinancing Credit Agreement” provides the Company with a $1.2 billion , five years revolving credit facility and a $400.0 million delayed draw term loan (the “Term Loan”). The Company incurred approximately $3.3 million of deferred financing costs related to the 2016 Refinancing Credit Agreement. The facility expires on June 22, 2021 . The 2016 Refinancing Credit Agreement borrowings bear variable interest rates indexed as described below. At September 30, 2017 , the Company had available bank borrowing capacity, net of $35.4 million of letters of credit, of approximately $686.7 million , subject to certain financial covenant restrictions. The Term Loan was initially drawn on November 25, 2016 . The Company incurred 10 basis point commitment fee from June 22, 2016 until the initial draw. Under the 2016 Refinancing Credit Agreement, the Company may elect a Base Rate of interest for U.S. Dollar denominated loans or, for certain currencies, an interest rate based on the London Interbank Offered Rate (“LIBOR”) of interest, or other rates appropriate for such currencies (in any case, “the Alternate Rate”). The Base Rate adjusts on a daily basis and is the greater of the Federal Funds Effective Rate plus 0.5% per annum, the PNC, N.A. prime rate or the Daily LIBOR Rate plus 100 basis points, plus a margin that ranges from 0 to 75 basis points. The Alternate Rate is based on the quoted rates specific to the applicable currency, plus a margin that ranges from 75 to 175 basis points. Both the Base Rate and Alternate Rate margins are dependent on the Company’s consolidated total indebtedness to EBITDA ratios. The initial Base Rate margin is 0 basis points and the Alternate Rate margin is 175 basis points. At September 30, 2017 , the weighted average interest rate on the Company’s variable rate debt was 2.89% . On January 12, 2012, the Company entered into a forward starting interest rate swap agreement with a notional value of $150.0 million . The effective date of the interest rate swap agreement was July 31, 2013 , and the termination date was November 7, 2016 . The impact of the interest rate swap agreement converted a portion of the Company’s outstanding debt from a variable rate to a fixed-rate borrowing. During the term of the interest rate swap agreement the interest rate on the notional value was fixed at 1.415% plus the Alternate Rate margin. On June 5, 2014 , the Company entered into a forward starting interest rate swap agreement with a notional value of $150.0 million . The effective date of the interest rate swap agreement was November 7, 2016 , and the termination date is December 19, 2018 . The impact of the interest rate swap agreement converts a portion of the Company’s outstanding debt from a variable rate to a fixed-rate borrowing. During the term of the interest rate swap agreement the interest rate on the notional value will be fixed at 2.56% plus the Alternate Rate margin. As for these agreements, the Company is exposed to credit risk in the event of nonperformance by the counterparties. However, since only the cash interest payments are exchanged, exposure is significantly less than the notional amount. The counterparties are large financial institutions with excellent credit ratings and history of performance. The Company currently believes the risk of nonperformance is negligible. The 2016 Refinancing Credit Agreement limits the Company’s ability to declare or pay cash dividends and prohibits the Company from declaring or making other distributions, subject to certain exceptions. The 2016 Refinancing Credit Agreement contains various other covenants and restrictions including the following limitations: incurrence of additional indebtedness; mergers, consolidations, sales of assets and acquisitions; additional liens; sale and leasebacks; permissible investments, loans and advances; certain debt payments; and imposes a minimum interest expense coverage ratio of 3.0 and a maximum debt to EBITDA ratio of 3.25 . The Company is in compliance with the restrictions and covenants of the 2016 Refinancing Credit Agreement and does not expect that these measurements will limit the Company in executing its operating activities. 2013 Refinancing Credit Agreement On December 19, 2013 , the Company amended its then existing revolving credit facility with a consortium of commercial banks. This “2013 Refinancing Credit Agreement” provided the Company with an $800.0 million , five -year revolving credit facility. The Company incurred approximately $1.0 million of deferred financing cost related to the 2013 Refinancing Credit Agreement. The 2013 Refinancing Credit Agreement was replaced by the 2016 Refinancing Credit Agreement. Under the 2013 Refinancing Credit Agreement, the Company could have elected a Base Rate of interest for U.S. Dollar denominated loans or, for certain currencies, an interest rate based on the LIBOR of interest, or other rates appropriate for such currencies (in any case, “the Alternate Rate”). The Base Rate adjusted on a daily basis and was the greater of the Federal Funds Effective Rate plus 0.5% per annum, the PNC, N.A. prime rate or the Daily LIBOR Rate plus 100 basis points, plus a margin that ranged from 0 to 75 basis points. The Alternate Rate was based on the quoted rates specific to the applicable currency, plus a margin that ranged from 75 to 175 basis points. Both the Base Rate and Alternate Rate margins were dependent on the Company’s consolidated total indebtedness to EBITDA ratios. Schuldschein Loan, Due 2024 In conjunction with the acquisition of Faiveley Transport, Wabtec acquired $137.2 million of a Schuldschein private placement loan which was originally issued by Faiveley Transport on March 5, 2014 in Germany, in which approximately 20 international investors participated. This loan is denominated in euros. Subsequent to the acquisition of Faiveley Transport, the Company repaid $125.8 million of the outstanding Schuldshein loan. The remaining balance of $11.8 million as of September 30, 2017 has a maturity of seven years and bears a fixed rate of 4.00% . The Schuldschein loan is senior unsecured and ranks pari passu with all existing and future senior debt and senior to all existing and future subordinated indebtedness of the Company. The Schuldshein loan agreement contains covenants and undertakings which limit, among other things, the following: factoring of receivables, the incurrence of indebtedness, sale of assets, change of control, mergers and consolidations and incurrence of liens. At September 30, 2017 , the Company is in compliance with the undertakings and covenants contained in the loan agreement.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2017
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	EMPLOYEE BENEFIT PLANS Defined Benefit Pension Plans The Company sponsors defined benefit pension plans that cover certain U.S., Canadian, German and United Kingdom employees and which provide benefits of stated amounts for each year of service of the employee. The Company uses a December 31 measurement date for the plans. The following tables provide information regarding the Company’s defined benefit pension plans summarized by U.S. and international components. U.S. International Three Months Ended September 30, Three Months Ended September 30, In thousands, except percentages 2017 2016 2017 2016 Net periodic benefit cost Service cost $ 86 $ 84 $ 614 $ 258 Interest cost 356 369 1,677 1,257 Expected return on plan assets (433 ) (519 ) (2,910 ) (2,437 ) Net amortization/deferrals 248 229 685 397 Net periodic benefit cost $ 257 $ 163 $ 66 $ (525 ) U.S. International Nine Months Ended Nine Months Ended In thousands, except percentages 2017 2016 2017 2016 Net periodic benefit cost Service cost $ 258 $ 252 $ 1,842 $ 986 Interest cost 1,068 1,107 5,031 4,193 Expected return on plan assets (1,299 ) (1,557 ) (8,730 ) (7,723 ) Net amortization/deferrals 744 687 2,055 1,452 Curtailment loss recognized — — — 240 Net periodic benefit (credit) cost $ 771 $ 489 $ 198 $ (852 ) Assumptions Discount Rate 3.95 % 4.21 % 2.51 % 3.56 % Expected long-term rate of return 4.95 % 5.70 % 4.93 % 5.81 % Rate of compensation increase 3.00 % 3.00 % 2.54 % 3.10 % The Company’s funding methods are based on governmental requirements and differ from those methods used to recognize pension expense. The Company expects to contribute $7.1 million and $0.5 million to the international and U.S. plans, respectively, during 2017. Post Retirement Benefit Plans In addition to providing pension benefits, the Company has provided certain unfunded postretirement health care and life insurance benefits for a portion of North American employees. The Company is not obligated to pay health care and life insurance benefits to individuals who had retired prior to 1990. The Company uses a December 31 measurement date for all post retirement plans. The following tables provide information regarding the Company’s postretirement benefit plans summarized by U.S. and international components. U.S. International Three Months Ended September 30, Three Months Ended September 30, In thousands, except percentages 2017 2016 2017 2016 Net periodic benefit cost Service cost $ 1 $ 1 $ 7 $ 7 Interest cost 88 97 24 25 Net amortization/deferrals (73 ) (105 ) (7 ) (9 ) Net periodic benefit (credit) cost $ 16 $ (7 ) $ 24 $ 23 U.S. International Nine Months Ended Nine Months Ended In thousands, except percentages 2017 2016 2017 2016 Net periodic benefit cost Service cost $ 3 $ 3 $ 21 $ 21 Interest cost 264 291 72 75 Net amortization/deferrals (219 ) (315 ) (21 ) (27 ) Net periodic (credit) benefit cost $ 48 $ (21 ) $ 72 $ 69 Assumptions Discount Rate 3.76 % 3.95 % 3.46 % 3.90 %

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	STOCK-BASED COMPENSATION As of September 30, 2017 , the Company maintains employee stock-based compensation plans for stock options, restricted stock, and incentive stock units as governed by the 2011 Stock Incentive Compensation Plan (the “2011 Plan”) and the 2000 Stock Incentive Plan, as amended (the “2000 Plan”). The 2011 Plan has a term through May 10, 2027 and provides a maximum of 3,800,000 shares for grants or awards, plus any shares which remain available under the 2000 Plan. The 2011 Plan was approved by stockholders of Wabtec on May 11, 2011, and an amendment and restatement of the 2011 Plan was approved by the Stockholders of Wabtec on May 10, 2017. The Company also maintains a Non-Employee Directors’ Fee and Stock Option Plan (“the Directors Plan”). Stock-based compensation expense was $14.5 million and $14.8 million for the nine months ended September 30, 2017 and 2016 , respectively. Included in stock-based compensation expense for the nine months ended September 30, 2017 is $1.2 million of expense related to stock options, $5.3 million related to restricted stock, $3.2 million related to restricted stock units, $3.7 million related to incentive stock units and $1.1 million related to units issued for Directors’ fees. At September 30, 2017 , unamortized compensation expense related to stock options, non-vested restricted shares units and incentive stock units expected to vest totaled $29.7 million and will be recognized over a weighted average period of 1.4 years . Stock Options Stock options are granted to eligible employees and directors at the fair market value, which is the average of the high and low Wabtec stock price on the date of grant. Under the 2011 Plan and the 2000 Plan, options become exercisable over a four -year vesting period and expire 10 years from the date of grant. The following table summarizes the Company’s stock option activity and related information for the 2011 Plan, the 2000 Plan and the Directors Plan for the nine months ended September 30, 2017 : Options Weighted Average Exercise Price Weighted Average Remaining Contractual Life Aggregate Intrinsic value (in thousands) Outstanding at December 31, 2016 1,098,823 $ 35.39 4.3 $ 52,332 Granted 65,522 87.09 0 Exercised (133,927 ) 21.84 7,220 Canceled (4,266 ) 72.91 13 Outstanding at September 30, 2017 1,026,152 40.30 4.1 36,377 Exercisable at September 30, 2017 838,004 32.15 3.4 36,537 The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions: Nine Months Ended 2017 2016 Dividend yield 0.23 % 0.26 % Risk-free interest rate 2.17 % 1.47 % Stock price volatility 23.4 % 26.9 % Expected life (years) 5.0 5.0 The dividend yield is based on the Company’s dividend rate and the current market price of the underlying common stock at the date of grant. Expected life in years is determined from historical stock option exercise data. Expected volatility is based on the historical volatility of the Company’s stock. The risk-free interest rate is based on the U.S. Treasury bond rates for the expected life of the option. Restricted Stock, Restricted Units and Incentive Stock Beginning in 2006, the Company adopted a restricted stock program. As provided for under the 2011 Plan and 2000 Plan, eligible employees are granted restricted stock that generally vests over four years from the date of grant. Under the Directors Plan, restricted stock units vest one year from the date of grant. In addition, the Company has issued incentive stock units to eligible employees that vest upon attainment of certain cumulative three -year performance goals. Based on the Company’s performance for each three -year period then ended, the incentive stock units can vest, with underlying shares of common stock being awarded in an amount ranging from 0% to 200% of the amount of initial incentive stock units granted. The incentive stock units included in the table below represent the number of incentive stock units that are expected to vest based on the Company’s estimate for meeting those established performance targets. As of September 30, 2017 , the Company estimates that it will achieve 73% , 68% and 80% for the incentive stock awards expected to vest based on performance for the three -year periods ending December 31, 2017 , 2018 , and 2019 , respectively, and has recorded incentive compensation expense accordingly. If our estimate of the number of these incentive stock units expected to vest changes in a future accounting period, cumulative compensation expense could increase or decrease and will be recognized in the current period for the elapsed portion of the vesting period and would change future expense for the remaining vesting period. Compensation expense for the non-vested restricted stock and incentive stock units is based on the average of the high and low Wabtec stock price on the date of grant and recognized over the applicable vesting period. The following table summarizes the restricted stock activity and related information for the 2011 Plan, the 2000 Plan and the Directors Plan, and incentive stock units activity for the 2011 Plan and the 2000 Plan with related information for the nine months ended September 30, 2017 : Restricted Stock and Units Incentive Stock Units Weighted Average Grant Date Fair Value Outstanding at December 31, 2016 396,295 424,750 $ 72.18 Granted 153,571 157,025 86.11 Vested (131,553 ) (153,271 ) 70.02 Adjustment for incentive stock awards expected to vest — (100,424 ) 75.43 Canceled (6,590 ) (5,158 ) 74.99 Outstanding at September 30, 2017 411,723 322,922

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The overall effective income tax rate was 15.7% and 23.4% for the three and nine months ended September 30, 2017 , respectively, and 28.5% and 29.7% for the three and nine months ended September 30, 2016 , respectively. For the three and nine months ended September 30, 2017 , the decrease in the effective rate is primarily due to $9.5 million of favorable deferred tax net benefits recorded in the three months ended September 30, 2017 and the result of a lower earnings mix in higher tax rate jurisdictions. The net favorable deferred tax benefits related to the adjustment of deferred tax liabilities which had originally been established in prior periods in several foreign jurisdictions. These adjustments were not material to the current year-to-date financial statements or prior years annual financial statements. As of September 30, 2017 and December 31, 2016 , the liability for income taxes associated with uncertain tax positions was $5.7 million , of which $3.2 million , if recognized, would favorably affect the Company’s effective tax rate. The Company includes interest and penalties related to uncertain tax positions in income tax expense. As of September 30, 2017 , the total accrued interest and penalties were $0.6 million and $0.3 million , respectively. As of December 31, 2016 , the total accrued interest and penalties were $0.8 million and $0.3 million , respectively. At this time, the Company believes it is reasonably possible that unrecognized tax benefits of approximately $3.6 million may change within the next 12 months due to the expiration of statutory review periods and current examinations. With limited exceptions, the Company is no longer subject to examination by various U.S. and foreign taxing authorities for years before 2013.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE The computation of basic and diluted earnings per share for net income attributable to Wabtec shareholders is as follows: Three Months Ended In thousands, except per share data 2017 2016 Numerator Numerator for basic and diluted earnings per common share - net income attributable to Wabtec shareholders $ 67,399 $ 82,428 Less: dividends declared - common shares and non-vested restricted stock (11,518 ) (8,958 ) Undistributed earnings 55,881 73,470 Percentage allocated to common shareholders (1) 99.7 % 99.7 % 55,713 73,250 Add: dividends declared - common shares 11,485 8,933 Numerator for basic and diluted earnings per common share $ 67,198 $ 82,183 Denominator Denominator for basic earnings per common share - weighted average shares 95,709 89,589 Effect of dilutive securities: Assumed conversion of dilutive stock-based compensation plans 607 704 Denominator for diluted earnings per common share - adjusted weighted average shares and assumed conversion 96,316 90,293 Net income attributable to Wabtec shareholders per common share Basic $ 0.70 $ 0.92 Diluted $ 0.70 $ 0.91 (1) Basic weighted-average common shares outstanding 95,709 89,589 Basic weighted-average common shares outstanding and non-vested restricted stock expected to vest 95,983 89,838 Percentage allocated to common shareholders 99.7 % 99.7 % Nine Months Ended In thousands, except per share data 2017 2016 Numerator Numerator for basic and diluted earnings per common share - net income attributable to Wabtec shareholders $ 213,313 $ 267,076 Less: dividends declared - common shares and non-vested restricted stock (30,693 ) (23,523 ) Undistributed earnings 182,620 243,553 Percentage allocated to common shareholders (1) 99.4 % 99.7 % 181,524 242,822 Add: dividends declared - common shares 30,508 23,452 Numerator for basic and diluted earnings per common share $ 212,032 $ 266,274 Denominator Denominator for basic earnings per common share - weighted average shares 95,163 90,546 Effect of dilutive securities: Assumed conversion of dilutive stock-based compensation plans 645 770 Denominator for diluted earnings per common share - adjusted weighted average shares and assumed conversion 95,808 91,316 Net income attributable to Wabtec shareholders per common share Basic $ 2.23 $ 2.94 Diluted $ 2.22 $ 2.92 (1) Basic weighted-average common shares outstanding 95,163 90,546 Basic weighted-average common shares outstanding and non-vested restricted stock expected to vest 95,740 90,819 Percentage allocated to common shareholders 99.4 % 99.7 % The Company’s non-vested restricted stock contains rights to receive nonforfeitable dividends, and thus are participating securities requiring the two-class method of computing earnings per share. The calculation of earnings per share for common stock shown above excludes the income attributable to the non-vested restricted stock from the numerator and excludes the dilutive impact of those shares from the denominator.

Warranties

Warranties	9 Months Ended
	Sep. 30, 2017
Product Warranties Disclosures [Abstract]
Warranties	WARRANTIES The following table reconciles the changes in the Company’s product warranty reserve as follows: In thousands 2017 2016 Balance at beginning of year $ 138,992 $ 92,064 Warranty expense 33,108 22,788 Acquisitions 3,412 7,571 Warranty claim payments (33,492 ) (27,693 ) Foreign currency impact/other 6,744 (620 ) Balance at September 30 $ 148,764 $ 94,110

Derivative Financial Instrument

Derivative Financial Instruments and Hedging	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments and Hedging	DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING Foreign Currency Hedging The Company uses forward contracts to mitigate its foreign currency exchange rate exposure due to forecasted sales of finished goods and future settlement of foreign currency denominated assets and liabilities. Derivatives used to hedge forecasted transactions and specific cash flows associated with foreign currency denominated financial assets and liabilities that meet the criteria for hedge accounting are designated as cash flow hedges. The effective portion of gain and losses is deferred as a component of accumulated other comprehensive income and is recognized in earnings at the time the hedged item affects earnings, in the same line item as the underlying hedged item. The contracts are scheduled to mature within two years. For the three and nine months ended September 30, 2017 and September 30, 2016 , the amounts reclassified into income were not material. Other Activities The Company enters into certain derivative contracts in accordance with its risk management strategy that do not meet the criteria for hedge accounting but which have the impact of largely mitigating foreign currency exposure. These foreign exchange contracts are accounted for on a full mark to market basis through earnings, with gains and losses recorded as a component of other expense, net. The net unrealized gain related to these contracts was $0.2 million for the three months ended September 30, 2017 . These contracts are scheduled to mature within one year. The following table summarizes the gross notional amounts and fair values of the designated and non-designated hedges discussed in the above sections as of September 30, 2017 . In millions Designated Non-Designated Total Gross notional amount $ 728.7 $ 406.4 $ 1,135.1 Fair Value: Other current assets 4.4 0.2 4.6 Other current liabilities — — — Total $ 4.4 $ 0.2 $ 4.6 The following table summarizes the gross notional amounts and fair values of the designated and non-designated hedges discussed in the above sections as of December 31, 2016 . In millions Designated Non-Designated Total Gross notional amount $ 911.0 $ 490.0 $ 1,401.0 Fair Value: Other current assets 1.1 0.4 1.5 Other current liabilities (0.5 ) (0.2 ) (0.7 ) Total $ 0.6 $ 0.2 $ 0.8 Interest Rate Hedging The Company uses interest rate swaps to manage interest rate exposures. The Company is exposed to interest rate volatility with regard to existing floating rate debt. Primary exposure includes the London Interbank Offered Rates (LIBOR). Derivatives used to hedge risk associated with changes in the fair value of certain variable-rate debt are primarily designated as fair value hedges. Consequently, changes in the fair value of these derivatives, along with changes in the fair value of debt obligations are recognized in current period earnings. Refer to footnote 13 for further information on interest rate swaps. As of September 30, 2017 , the Company has recorded a current liability of $2.0 million and an accumulated other comprehensive loss of $1.2 million , net of tax, related to these agreements .

Fair Value Measurement and Fair

Fair Value Measurement and Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurement and Fair Value of Financial Instruments	FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS ASC 820 “Fair Value Measurements and Disclosures” defines fair value, establishes a framework for measuring fair value and explains the related disclosure requirements. ASC 820 indicates, among other things, that a fair value measurement assumes that the transaction to sell an asset or transfer a liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability and defines fair value based upon an exit price model. Valuation Hierarchy ASC 820 establishes a valuation hierarchy for disclosure of the inputs to valuation used to measure fair value. This hierarchy prioritizes the inputs into three broad levels as follows. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 inputs are unobservable inputs based on the Company’s assumptions used to measure assets and liabilities at fair value. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The following table provides the liabilities carried at fair value measured on a recurring basis as of September 30, 2017 , which are included in other current liabilities on the Condensed Consolidated Balance sheet: Fair Value Measurements at September 30, 2017 Using In thousands Total Carrying Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Interest rate swap agreements $ 1,952 $ — $ 1,952 $ — Total $ 1,952 $ — $ 1,952 $ — The following table provides the liabilities carried at fair value measured on a recurring basis as of December 31, 2016 , which is included in other current liabilities on the Condensed Consolidated Balance sheet: Fair Value Measurements at December 31, 2016 Using In thousands Total Carrying Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Interest rate swap agreements $ 3,888 $ — $ 3,888 $ — Total $ 3,888 $ — $ 3,888 $ — To reduce the impact of interest rate changes on a portion of its variable-rate debt, the Company entered into interest rate swaps which effectively converted a portion of the debt from variable to fixed-rate borrowings during the term of the swap contracts. For certain derivative contracts whose fair values are based upon trades in liquid markets, such as interest rate swaps, valuation model inputs can generally be verified and valuation techniques do not involve significant management judgment. The fair values of such financial instruments are generally classified within Level 2 of the fair value hierarchy. As a result of our global operating activities the Company is exposed to market risks from changes in foreign currency exchange rates, which may adversely affect our operating results and financial position. When deemed appropriate, the Company minimizes these risks through entering into foreign currency forward contracts. The foreign currency forward contracts are valued using broker quotations, or market transactions in either the listed or over-the counter markets. As such, these derivative instruments are classified within Level 2. The Company’s cash and cash equivalents are highly liquid investments purchased with an original maturity of three months or less and are considered Level 1 on the fair value valuation hierarchy. The fair value of cash and cash equivalents approximated the carrying value at September 30, 2017 and December 31, 2016 . The Company’s defined benefit pension plan assets consist primarily of equity security funds, debt security funds and temporary cash and cash equivalent investments. Generally, all plan assets are considered Level 2 based on the fair value valuation hierarchy. These investments are comprised of a number of investment funds that invest in a diverse portfolio of assets including equity securities, corporate and governmental bonds, and money markets. Trusts are valued at the net asset value (“NAV”) as determined by their custodian. NAV represent the accumulation of the unadjusted quoted close prices on the reporting date for the underlying investments divided by the total shares outstanding at the reporting dates. The 2013 and 2016 Notes are considered Level 2 based on the fair value valuation hierarchy. The estimated fair values and related carrying values of the Company’s financial instruments are as follows: September 30, 2017 December 31, 2016 In thousands Carry Value Fair Value Carry Fair Interest rate swap agreement $ 1,952 $ 1,952 $ 3,888 $ 3,888 4.375% Senior Notes 248,502 264,000 248,310 260,265 3.45% Senior Notes 747,590 739,050 747,474 719,273 The fair value of the Company’s interest rate swap agreements and the 2013 and 2016 Notes were based on dealer quotes and represent the estimated amount the Company would pay to the counterparty to terminate the agreement.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Claims have been filed against the Company and certain of its affiliates in various jurisdictions across the United States by persons alleging bodily injury as a result of exposure to asbestos-containing products. Further information and detail on these claims is described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 , in Note 19 therein, filed on February 28, 2017. During the first nine months of 2017 , there were no material changes to the information described in the Form 10-K. From time to time, the Company is involved in litigation related to claims arising out of the Company's operations in the ordinary course of business, including claims based on product liability, contracts, intellectual property, or other causes of action. Further information and detail on any potentially material litigation is as described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 , in Note 19 therein, filed on February 28, 2017. Except as described below, there have been no material changes to the information described in the Form 10-K, including with respect to the litigation with Siemens described therein. Xorail, Inc., a wholly owned subsidiary of the Company (“Xorail”), has received notices from Denver Transit Constructors (“Denver Transit”) alleging breach of contract related to the operating of constant warning wireless crossings, and late delivery of the Train Management & Dispatch System (“TMDS”) for the Denver Eagle P3 Project, which is owned by the Denver Regional Transit District ("RTD"). No damages have been asserted for the alleged late delivery of the TMDS, and Xorail is in the final stages of successfully implementing a recovery plan concerning the TMDS issues. With regard to the wireless crossings, as of September 8, 2017, Denver Transit alleged that total damages were $36.8 million through July 31, 2017, and are continuing to accumulate. The crossings have not been certified for use without flaggers, which Denver Transit alleges is due to Xorail's failure to achieve constant warning times satisfactory to the Federal Railway Administration ("FRA") and the Public Utility Commission ("PUC"). No claims have been filed by Denver Transit with regard to either issue. Xorail has denied Denver Transit’s assertions regarding the wireless crossings, and Denver Transit has also notified RTD that Denver Transit considers the new certification requirements imposed by FRA and/or PUC as a change in law, for which neither Denver Transit nor its subcontractors are liable. Xorail has worked with Denver Transit to modify its system to meet the FRA’s and PUC's previously undefined, and evolving, certification requirements. On September 28, 2017, the FRA granted a 5 year approval of the modified wireless crossing system as currently implemented; however, the PUC has not granted approval of the modified system and therefore the crossings are still not certified for use without flaggers. Denver Transit and RTD are continuing to seek approval from PUC. The Company does not believe that it has any liability with respect to the wireless crossing issue.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION Wabtec has two reportable segments—the Freight Segment and the Transit Segment. The key factors used to identify these reportable segments are the organization and alignment of the Company’s internal operations, the nature of the products and services, and customer type. The business segments are: Freight Segment primarily manufactures and services components for new and existing freight cars and locomotives, builds new switcher locomotives, rebuilds freight locomotives, supplies railway electronics, positive train control equipment, signal design and engineering services, and provides related heat exchange and cooling systems. Customers include large, publicly traded railroads, leasing companies, manufacturers of original equipment such as locomotives and freight cars, and utilities. Transit Segment primarily manufactures and services components for new and existing passenger transit vehicles, typically regional trains, high speed trains, subway cars, light-rail vehicles and buses, builds new commuter locomotives, refurbishes subway cars, provides heating, ventilation, and air conditioning equipment, and doors for buses and subways. Customers include public transit authorities and municipalities, leasing companies, and manufacturers of subway cars and buses around the world. The Company evaluates its business segments’ operating results based on income from operations. Intersegment sales are accounted for at prices that are generally established by reference to similar transactions with unaffiliated customers. Corporate activities include general corporate expenses, elimination of intersegment transactions, interest income and expense and other unallocated charges. Since certain administrative and other operating expenses have not been allocated to business segments, the results in the following tables are not necessarily a measure computed in accordance with generally accepted accounting principles and may not be comparable to other companies. Segment financial information for the three months ended September 30, 2017 is as follows: In thousands Freight Segment Transit Segment Corporate Activities and Elimination Total Sales to external customers $ 340,185 $ 617,746 $ — $ 957,931 Intersegment sales/(elimination) 8,376 4,494 (12,870 ) — Total sales $ 348,561 $ 622,240 $ (12,870 ) $ 957,931 Income (loss) from operations $ 61,596 $ 47,531 $ (7,116 ) $ 102,011 Interest expense and other, net — — (20,826 ) (20,826 ) Income (loss) from operations before income taxes $ 61,596 $ 47,531 $ (27,942 ) $ 81,185 Segment financial information for the three months ended September 30, 2016 is as follows: In thousands Freight Segment Transit Segment Corporate Activities and Elimination Total Sales to external customers $ 361,998 $ 313,576 $ — $ 675,574 Intersegment sales/(elimination) 10,341 1,823 (12,164 ) — Total sales $ 372,339 $ 315,399 $ (12,164 ) $ 675,574 Income (loss) from operations $ 77,999 $ 51,164 $ (9,067 ) $ 120,096 Interest expense and other, net — — (4,869 ) (4,869 ) Income (loss) from operations before income taxes $ 77,999 $ 51,164 $ (13,936 ) $ 115,227 Segment financial information for the nine months ended September 30, 2017 is as follows: In thousands Freight Segment Transit Segment Corporate Activities and Elimination Total Sales to external customers $ 1,032,959 $ 1,773,259 $ — $ 2,806,218 Intersegment sales/(elimination) 27,602 16,253 (43,855 ) — Total sales $ 1,060,561 $ 1,789,512 $ (43,855 ) $ 2,806,218 Income (loss) from operations $ 196,328 $ 155,901 $ (21,659 ) $ 330,570 Interest expense and other, net — — (53,191 ) (53,191 ) Income (loss) from operations before income taxes $ 196,328 $ 155,901 $ (74,850 ) $ 277,379 Segment financial information for the nine months ended September 30, 2016 is as follows: In thousands Freight Transit Corporate Total Sales to external customers $ 1,201,734 $ 969,472 $ — $ 2,171,206 Intersegment sales/(elimination) 29,765 7,606 (37,371 ) — Total sales $ 1,231,499 $ 977,078 $ (37,371 ) $ 2,171,206 Income (loss) from operations $ 276,990 $ 148,321 $ (29,750 ) $ 395,561 Interest expense and other, net — — (15,784 ) (15,784 ) Income (loss) from operations before income taxes $ 276,990 $ 148,321 $ (45,534 ) $ 379,777 Sales by product line are as follows: Three Months Ended September 30, In thousands 2017 2016 Specialty Products & Electronics $ 335,143 $ 334,349 Transit Products 276,913 44,996 Brake Products 177,165 134,900 Remanufacturing, Overhaul & Build 132,018 129,264 Other 36,692 32,065 Total sales $ 957,931 $ 675,574 Nine Months Ended In thousands 2017 2016 Specialty Products & Electronics $ 975,006 $ 1,051,806 Transit Products 789,096 143,434 Brake Products 550,181 428,785 Remanufacturing, Overhaul & Build 387,634 444,278 Other 104,301 102,903 Total sales $ 2,806,218 $ 2,171,206

Guarantor Subsidiaries Financia

Guarantor Subsidiaries Financial Information	9 Months Ended
	Sep. 30, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Guarantor Subsidiaries Financial Information	GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION The obligations under the Company's 2016 Notes, 2013 Notes, and Revolving Credit Facility and Term Loan are fully and unconditionally guaranteed by all U.S. subsidiaries as guarantors. Each guarantor is 100% owned by the parent company. In accordance with positions established by the Securities and Exchange Commission, the following shows separate financial information with respect to the parent, the guarantor subsidiaries and the non-guarantor subsidiaries. The principal elimination entries eliminate investment in subsidiaries and certain intercompany balances and transactions. Balance Sheet for September 30, 2017 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Cash and cash equivalents $ 3,049 $ 6,082 $ 218,949 $ — $ 228,080 Receivables, net 75,123 232,060 837,156 — 1,144,339 Inventories 132,044 140,745 491,992 — 764,781 Current assets - other 39,216 4,283 96,426 — 139,925 Total current assets 249,432 383,170 1,644,523 — 2,277,125 Property, plant and equipment, net 51,196 134,397 364,774 — 550,367 Goodwill 25,276 549,198 1,810,284 — 2,384,758 Investment in subsidiaries 6,304,037 2,508,725 — (8,812,762 ) — Other intangibles, net 30,905 251,485 857,997 — 1,140,387 Other long term assets 29,724 6,273 61,016 — 97,013 Total assets $ 6,690,570 $ 3,833,248 $ 4,738,594 $ (8,812,762 ) $ 6,449,650 Current liabilities $ 162,470 199,511 $ 1,103,459 — $ 1,465,440 Inter-company 2,031,256 (1,942,433 ) (88,823 ) — — Long-term debt 1,740,541 25 83,590 — 1,824,156 Long-term liabilities - other 38,601 87,935 297,149 — 423,685 Total liabilities 3,972,868 (1,654,962 ) 1,395,375 — 3,713,281 Shareholders' equity 2,717,702 5,489,597 3,323,165 (8,812,762 ) 2,717,702 Non-controlling interest — (1,387 ) 20,054 — 18,667 Total shareholders' equity $ 2,717,702 $ 5,488,210 $ 3,343,219 $ (8,812,762 ) $ 2,736,369 Total Liabilities and Shareholders' Equity $ 6,690,570 $ 3,833,248 $ 4,738,594 $ (8,812,762 ) $ 6,449,650 Balance Sheet for December 31, 2016 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Cash and cash equivalents $ 2,522 $ 9,496 $ 386,466 $ — $ 398,484 Receivables, net 79,041 202,779 660,688 — 942,508 Inventories 120,042 128,076 410,392 — 658,510 Current assets - other 52,576 (17,844 ) 833,397 — 868,129 Total current assets 254,181 322,507 2,290,943 — 2,867,631 Property, plant and equipment, net 49,031 126,661 342,684 — 518,376 Goodwill 25,275 477,472 1,576,018 — 2,078,765 Investment in subsidiaries 5,388,613 1,325,150 — (6,713,763 ) — Other intangibles, net 31,897 204,512 817,451 — 1,053,860 Other long term assets 9,592 (1,914 ) 54,708 — 62,386 Total assets $ 5,758,589 $ 2,454,388 $ 5,081,804 $ (6,713,763 ) $ 6,581,018 Current liabilities $ 194,983 196,956 $ 1,054,700 — $ 1,446,639 Inter-company 1,562,399 (1,848,777 ) 286,378 — — Long-term debt 1,761,933 58 976 — 1,762,967 Long-term liabilities - other 33,298 74,977 286,312 — 394,587 Total liabilities 3,552,613 (1,576,786 ) 1,628,366 — 3,604,193 Shareholders' equity 2,205,976 4,032,250 2,681,514 (6,713,763 ) 2,205,977 Non-controlling interest — (1,076 ) 771,924 — 770,848 Total shareholders' equity $ 2,205,976 $ 4,031,174 $ 3,453,438 $ (6,713,763 ) $ 2,976,825 Total Liabilities and Shareholders' Equity $ 5,758,589 $ 2,454,388 $ 5,081,804 $ (6,713,763 ) $ 6,581,018 Income Statement for the Three Months Ended September 30, 2017 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Net Sales $ 134,906 $ 270,116 $ 587,289 $ (34,380 ) $ 957,931 Cost of sales (111,775 ) (176,291 ) (444,704 ) 28,042 (704,728 ) Gross profit (loss) 23,131 93,825 142,585 (6,338 ) 253,203 Total operating expenses (22,714 ) (29,991 ) (98,487 ) — (151,192 ) Income (loss) from operations 417 63,834 44,098 (6,338 ) 102,011 Interest (expense) income, net (19,222 ) 1,143 186 — (17,893 ) Other income (expense), net 274 (356 ) (2,851 ) — (2,933 ) Equity earnings (loss) 80,874 19,806 — (100,680 ) — Pretax income (loss) 62,343 84,427 41,433 (107,018 ) 81,185 Income tax expense 5,056 (5 ) (17,797 ) — (12,746 ) Net income (loss) 67,399 84,422 23,636 (107,018 ) 68,439 Less: Net income attributable to noncontrolling interest — 155 (1,195 ) — (1,040 ) Net income (loss) attributable to Wabtec shareholders $ 67,399 $ 84,577 $ 22,441 $ (107,018 ) $ 67,399 Comprehensive income (loss) attributable to Wabtec shareholders $ 66,813 $ 84,577 $ 115,647 $ (107,018 ) $ 160,019 Income Statement for the Three Months Ended September 30, 2016 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Net Sales $ 155,731 $ 259,174 $ 295,336 $ (34,667 ) $ 675,574 Cost of sales (109,414 ) (186,546 ) (211,392 ) 44,259 (463,093 ) Gross profit (loss) 46,317 72,628 83,944 9,592 212,481 Total operating expenses (21,979 ) (29,019 ) (41,387 ) — (92,385 ) (Loss) income from operations 24,338 43,609 42,557 9,592 120,096 Interest (expense) income, net (7,854 ) 1,728 69 — (6,057 ) Other income (expense), net 6,600 (86 ) (5,326 ) — 1,188 Equity earnings (loss) 86,731 27,099 — (113,830 ) — Pretax income (loss) 109,815 72,350 37,300 (104,238 ) 115,227 Income tax expense (27,387 ) 1,567 (6,979 ) — (32,799 ) Net income (loss) 82,428 73,917 30,321 (104,238 ) 82,428 Less: Net income attributable to noncontrolling interest — — — — — Net income attributable to Wabtec shareholders $ 82,428 $ 73,917 $ 30,321 $ (104,238 ) $ 82,428 Comprehensive income (loss) attributable to Wabtec shareholders $ 82,987 $ 73,916 $ 34,054 $ (104,238 ) $ 86,719 Income Statement for the Nine Months Ended September 30, 2017 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Net Sales $ 417,156 $ 778,893 $ 1,708,646 $ (98,477 ) $ 2,806,218 Cost of sales (311,037 ) (503,686 ) (1,270,668 ) 76,046 (2,009,345 ) Gross profit (loss) 106,119 275,207 437,978 (22,431 ) 796,873 Total operating expenses (79,960 ) (89,935 ) (296,408 ) — (466,303 ) Income (loss) from operations 26,159 185,272 141,570 (22,431 ) 330,570 Interest (expense) income, net (52,565 ) 5,554 (4,014 ) — (51,025 ) Other income (expense), net 3,127 (2,233 ) (3,060 ) — (2,166 ) Equity earnings (loss) 246,103 69,954 — (316,057 ) — Pretax income (loss) 222,824 258,547 134,496 (338,488 ) 277,379 Income tax expense (9,511 ) (22 ) (55,243 ) — (64,776 ) Net income (loss) 213,313 258,525 79,253 (338,488 ) 212,603 Less: Net income attributable to noncontrolling interest — 311 399 — 710 Net income (loss) attributable to Wabtec shareholders $ 213,313 $ 258,836 $ 79,652 $ (338,488 ) $ 213,313 Comprehensive income (loss) attributable to Wabtec shareholders $ 214,482 $ 258,838 $ 366,156 $ (338,488 ) $ 500,988 Income Statement for the Nine Months Ended September 30, 2016 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Net Sales $ 494,350 $ 865,850 $ 924,559 $ (113,553 ) $ 2,171,206 Cost of sales (356,575 ) (561,361 ) (641,550 ) 93,330 (1,466,156 ) Gross profit (loss) 137,775 304,489 283,009 (20,223 ) 705,050 Total operating expenses (88,916 ) (91,967 ) (128,606 ) — (309,489 ) (Loss) income from operations 48,859 212,522 154,403 (20,223 ) 395,561 Interest (expense) income, net (21,608 ) 5,049 662 — (15,897 ) Other income (expense), net 17,640 (3,956 ) (13,571 ) — 113 Equity earnings (loss) 308,681 111,917 — (420,598 ) — Pretax income (loss) 353,572 325,532 141,494 (440,821 ) 379,777 Income tax expense (86,495 ) (380 ) (25,826 ) — (112,701 ) Net income (loss) 267,077 325,152 115,668 (440,821 ) 267,076 Less: Net income attributable to noncontrolling interest — — — — — Net income attributable to Wabtec shareholders $ 267,077 $ 325,152 $ 115,668 $ (440,821 ) $ 267,076 Comprehensive income (loss) attributable to Wabtec shareholders $ 266,355 $ 325,152 $ 107,054 $ (440,821 ) $ 257,740 Condensed Statement of Cash Flows for the Nine Months Ended September 30, 2017 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Net cash (used for) provided by operating activities $ (38,954 ) $ 115,816 $ (27,921 ) $ (22,430 ) $ 26,511 Net cash used for investing activities (12,591 ) (110,741 ) (26,492 ) — (149,824 ) Net cash provided by (used for) financing activities 52,072 (8,489 ) (136,062 ) 22,430 (70,049 ) Effect of changes in currency exchange rates — — 22,958 — 22,958 Increase (decrease) in cash 527 (3,414 ) (167,517 ) — (170,404 ) Cash, beginning of period 2,522 9,496 386,466 — 398,484 Cash, end of period $ 3,049 $ 6,082 $ 218,949 $ — $ 228,080 Condensed Statement of Cash Flows for the Nine Months Ended September 30, 2016 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Net cash (used for) provided by operating activities $ (53,967 ) $ 220,963 $ 100,120 $ (20,223 ) $ 246,893 Net cash used for investing activities (5,067 ) (26,693 ) (84,131 ) — (115,891 ) Net cash provided by (used for) financing activities 70,272 (193,669 ) (9,162 ) 20,223 (112,336 ) Effect of changes in currency exchange rates — — 5,525 — 5,525 Increase (decrease) in cash 11,238 601 12,352 — 24,191 Cash, beginning of period — 13,157 213,034 — 226,191 Cash, end of period $ 11,238 $ 13,758 $ 225,386 $ — $ 250,382

Other Income (Expense), Net

Other Income (Expense), Net	9 Months Ended
	Sep. 30, 2017
Other Income and Expenses [Abstract]
Other Income (Expense), Net	OTHER INCOME (EXPENSE), NET The components of other income (expense) are as follows: Three Months Ended Nine Months Ended September 30, In thousands 2017 2016 2017 2016 Foreign currency (loss) gain $ (4,113 ) $ 880 $ (5,202 ) $ (488 ) Equity income 520 — 1,587 — Other miscellaneous expense 660 308 1,449 601 Total other income (expense), net $ (2,933 ) $ 1,188 $ (2,166 ) $ 113

Accounting Policies (Policies)

Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Basis of Presentation	The unaudited condensed consolidated interim financial statements have been prepared in accordance with generally accepted accounting principles ("GAAP") in the United States of America and the rules and regulations of the Securities and Exchange Commission and include the accounts of Wabtec and its subsidiaries in which Wabtec has a controlling interest. These condensed consolidated interim financial statements do not include all of the information and footnotes required for complete financial statements. In management’s opinion, these financial statements reflect all adjustments of a normal, recurring nature necessary for a fair presentation of the results for the interim periods presented. Results for these interim periods are not necessarily indicative of results to be expected for the full year. The Company operates on a four-four-five week accounting quarter, and the quarters end on or about March 31, June 30, September 30, and December 31. The notes included herein should be read in conjunction with the audited consolidated financial statements included in Wabtec’s Annual Report on Form 10-K for the year ended December 31, 2016 . The December 31, 2016 information has been derived from the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 .
Revenue Recognition	Certain pre-production costs relating to long-term production and supply contracts have been deferred and will be recognized over the life of the contracts. Revenue is recognized in accordance with Accounting Standards Codification (“ASC”) 605 “Revenue Recognition.” Revenue is recognized when products have been shipped to the respective customers, title has passed and the price for the product has been determined. In general, the Company recognizes revenue from long-term contracts based on the percentage of completion method of accounting. The units-of-delivery method or other input-based or output-based measures, as appropriate, are used to measure the progress toward completion of individual contracts. Contract revenues and cost estimates are reviewed and revised quarterly at a minimum and adjustments are reflected in the accounting period as such amounts are determined. Provisions are made currently for estimated losses on uncompleted contracts
Reclassifications	Certain prior year amounts have been reclassified, where necessary, to conform to the current year presentation. Refer to Recently Adopted Accounting Pronouncements below.
Use of Estimates	The preparation of financial statements in conformity with generally accepted accounting principles in the United States requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting period. Actual amounts could differ from the estimates. On an ongoing basis, management reviews its estimates based on currently available information. Changes in facts and circumstances may result in revised estimates.
Financial Derivatives and Hedging Activities	As part of its risk management strategy, the Company utilizes derivative financial instruments to manage its exposure due to changes in foreign currencies and interest rates. For further information regarding financial derivatives and hedging activities, refer to Footnotes 12 and 13.
Foreign Currency Translation	Assets and liabilities of foreign subsidiaries, except for the Company’s Mexican operations whose functional currency is the U.S. Dollar, are translated at the rate of exchange in effect on the balance sheet date while income and expenses are translated at the average rates of exchange prevailing during the period. Foreign currency gains and losses resulting from transactions and the translation of financial statements are recorded in the Company’s consolidated financial statements based upon the provisions of ASC 830 “Foreign Currency Matters.” The effects of currency exchange rate changes on intercompany transactions and balances of a long-term investment nature are accumulated and carried as a component of accumulated other comprehensive loss. The effects of currency exchange rate changes on intercompany transactions that are denominated in a currency other than an entity’s functional currency are charged or credited to earnings.
Noncontrolling Interests	In accordance with ASC 810 "Consolidation", the Company has classified noncontrolling interests as equity on the condensed consolidated balance sheets as of September 30, 2017 and December 31, 2016 .
Recently Issued Accounting Pronouncements	In March 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2017-07 "Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost". The amendments in this update require the service cost component of net benefit costs to be reported in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit costs are required to be presented in the income statement separately from the service cost component and outside income from operations. This update also allows the service cost component to be eligible for capitalization when applicable. The ASU is effective for public companies in the fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption was permitted as of the beginning of an annual period. The amendments should be applied retrospectively for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the income statement and prospectively for the capitalization of the service cost component of net periodic pension cost and net periodic postretirement benefit in assets. The Company does not expect the adoption of this guidance in 2018 to have a material impact on the Company's financial statements. In January 2017, the FASB issued ASU No. 2017-04 "Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment". The amendments in this update eliminate the requirement to perform Step 2 of the goodwill impairment test. Instead, an entity should perform a goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value up to the carrying amount of the goodwill. The ASU is effective for public companies in the fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted. The impact of adopting this guidance could result in a change in the overall conclusion as to whether or not a reporting units' goodwill is impaired and the amount of an impairment charge recognized in the event a reporting units' carrying value exceeds its fair value. All of the Company's reporting units had fair values that were substantially greater than the carrying value as of the Company's last quantitative goodwill impairment test, which was performed as of October 1, 2016. In November 2016, the FASB issued ASU No. 2016-18 "Statement of Cash Flows (Topic 230): Restricted Cash". The amendments in this update require a statement of cash flows to explain the change during the period in total cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The ASU is effective for public companies in the fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the potential impact of adopting this guidance on its consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 814)" which requires lessees to recognize a right of use asset and lease liability on the balance sheet for all leases with terms longer than 12 months. For leases with terms less than 12 months, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize a right of use asset and lease liability. The ASU is effective for public companies in the fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company is currently evaluating the potential impact of adopting this guidance on its consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contract with Customers.” The ASU will supersede most of the existing revenue recognition requirements in U.S. GAAP and will require entities to recognize revenue at an amount that reflects the consideration to which the Company expects to be entitled in exchange for transferring goods or services to a customer. The new standard also requires significantly expanded disclosures regarding the qualitative and quantitative information of an entity’s nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The Board voted to propose that the standard would take effect for reporting periods beginning after December 15, 2017 and that early adoption would be allowed as of the original effective date. The impact of adopting the new standard on net sales and operating income for the three and nine months ended September 30, 2017 and 2016 is not expected to be material. The Company also does not expect a material impact to the consolidated balance sheet. The impact to results is not anticipated to be material because the analysis of the Company's current contracts under the new revenue recognition standard supports how the Company is currently recognizing revenue over time and at a point in time; however, the Company's conclusions may evolve as management completes its contract reviews and evaluation. The Company plans to adopt this accounting standard update using the modified retrospective method, with the cumulative effect of initially applying this update recognized in the first reporting period of 2018. The Company is in the process of drafting an updated accounting policy, evaluating new disclosure requirements and identifying and implementing appropriate changes to its business processes, systems and controls to support recognition and disclosure under the new guidance. The Company believes it is following an appropriate timeline to appropriately adopt this new standard on January 1, 2018. Recently Adopted Accounting Pronouncements In March 2016, the FASB issued ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting”. The ASU simplifies several aspects for the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The ASU became effective for public companies during interim and annual reporting periods beginning after December 15, 2016. In accordance with this update, the Company began recognizing all excess tax deficiencies and tax benefits from share-based payment awards as a benefit or expense to income tax in the income statement. This update has been adopted prospectively in accordance with the ASU and the impact of adoption on the income statement was not material. Additionally in accordance with this update, the Company began classifying excess income tax benefits from exercise of stock options as an operating activity on the consolidated statement of cash flows. The Company elected to adopt this amendment retrospectively and the impact of the adoption on operating and financing cash flows for the three and nine months ended September 30, 2016 was not material. In November 2015, the FASB issued ASU No. 2015-17, "Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes" which simplifies the presentation of deferred income taxes by requiring deferred tax assets and liabilities to be classified as noncurrent on the balance sheet. The Company elected to early adopt this ASU as of December 31, 2016; therefore, all deferred income tax assets and liabilities are classified in the noncurrent deferred income taxes line-items on the consolidated balance sheets.
Other Comprehensive Income	Comprehensive income comprises both net income and the change in equity from transactions and other events and circumstances from nonowner sources.

Accounting Policies (Tables)

Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax	The changes in accumulated other comprehensive loss by component, net of tax, for the nine months ended September 30, 2017 are as follows: In thousands Foreign currency translation Derivative contracts Pension and post retirement benefit plans Total Balance at December 31, 2016 $ (321,033 ) $ (2,957 ) $ (55,615 ) $ (379,605 ) Other comprehensive income (loss) before reclassifications 277,984 11,424 (4,715 ) 284,693 Amounts reclassified from accumulated other comprehensive income — 1,206 1,776 2,982 Net current period other comprehensive income (loss) 277,984 12,630 (2,939 ) 287,675 Balance at September 30, 2017 $ (43,049 ) $ 9,673 $ (58,554 ) $ (91,930 ) The changes in accumulated other comprehensive loss by component, net of tax, for the nine months ended September 30, 2016 are as follows: Foreign Derivative Pension and Total Balance at December 31, 2015 $ (227,349 ) $ (2,987 ) $ (46,383 ) $ (276,719 ) Other comprehensive income (loss) before reclassifications (7,385 ) (2,192 ) (1,969 ) (11,546 ) Amounts reclassified from accumulated other comprehensive income — 883 1,327 2,210 Net current period other comprehensive (loss) (7,385 ) (1,309 ) (642 ) (9,336 ) Balance at September 30, 2016 $ (234,734 ) $ (4,296 ) $ (47,025 ) $ (286,055 )
Reclassifications Out of Accumulated Other Comprehensive Loss	Reclassifications out of accumulated other comprehensive loss for the three months ended September 30, 2016 are as follows: In thousands Amount reclassified from Affected line item in the Amortization of defined pension and post retirement items Amortization of initial net obligation and prior service cost $ 6 Cost of sales Amortization of net loss 611 Cost of sales 617 Income from Operations (175 ) Income tax expense $ 442 Net income Derivative contracts Realized loss on derivative contracts $ 338 Interest expense, net (96 ) Income tax expense $ 242 Net income Reclassifications out of accumulated other comprehensive loss for the nine months ended September 30, 2016 are as follows: In thousands Amount reclassified from Affected line item in the Amortization of defined pension and post retirement items Amortization of initial net obligation and prior service cost $ (801 ) Cost of sales Amortization of net loss 2,702 Cost of sales 1,901 Income from Operations (574 ) Income tax expense $ 1,327 Net income Derivative contracts Realized loss on derivative contracts $ 1,265 Interest expense, net (382 ) Income tax expense $ 883 Net income Reclassifications out of accumulated other comprehensive loss for the three months ended September 30, 2017 are as follows: In thousands Amount reclassified from accumulated other comprehensive income Affected line item in the Condensed Consolidated Statements of Income Amortization of defined pension and post retirement items Amortization of initial net obligation and prior service cost $ (422 ) Cost of sales Amortization of net loss 1,240 Cost of sales 818 Income from Operations (226 ) Income tax expense $ 592 Net income Derivative contracts Realized loss on derivative contracts $ 497 Interest expense, net (131 ) Income tax expense $ 366 Net income Reclassifications out of accumulated other comprehensive loss for the nine months ended September 30, 2017 are as follows: In thousands Amount reclassified from accumulated other comprehensive income Affected line item in the Condensed Consolidated Statements of Income Amortization of defined pension and post retirement items Amortization of initial net obligation and prior service cost $ (1,266 ) Cost of sales Amortization of net loss 3,720 Cost of sales 2,454 Income from Operations (678 ) Income tax expense $ 1,776 Net income Derivative contracts Realized loss on derivative contracts $ 1,653 Interest expense, net (447 ) Income tax expense $ 1,206 Net income

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Summary of Preliminary Estimated Fair Values of the Assets Acquired and Liabilities Assumed at the Date of the Acquisition	The following table summarizes the preliminary estimated fair values of the assets acquired and liabilities assumed at the date of the acquisition for TTC, ATP, Workhorse, and Precision Turbo. For the Unitrac and Gerken acquisitions, the following table summarizes the final fair value of the assets acquired and liabilities assumed at the date of acquisition. TTC ATP Workhorse Precision Turbo Gerken Unitrac In thousands April 5, March 14, December 14, November 17, August 1, May 5, Current assets $ 3,746 $ 11,666 $ 9,137 $ 4,145 $ 32,706 $ 11,476 Property, plant & equipment 5,909 5,354 — 1,346 7,667 1,768 Goodwill 16,309 31,934 24,373 4,019 17,470 2,442 Other intangible assets 12,300 22,100 19,400 5,200 30,560 1,230 Other assets — — — — 1,706 — Total assets acquired 38,264 71,054 52,910 14,710 90,109 16,916 Total liabilities assumed (5,753 ) (5,800 ) (9,083 ) (884 ) (27,262 ) (2,145 ) Net assets acquired $ 32,511 $ 65,254 $ 43,827 $ 13,826 $ 62,847 $ 14,771 The following table summarizes the preliminary estimated fair values of the Faiveley Transport assets acquired and liabilities assumed: In thousands Assets acquired Cash and cash equivalents $ 178,318 Accounts receivable 444,741 Inventories 205,649 Other current assets 70,930 Property, plant, and equipment 148,746 Goodwill 1,257,360 Trade names 346,328 Customer relationships 233,529 Patents 1,201 Other noncurrent assets 183,252 Total assets acquired 3,070,054 Liabilities assumed Current liabilities 805,992 Debt 409,899 Other noncurrent liabilities 347,348 Total liabilities assumed 1,563,239 Net assets acquired $ 1,506,815
Pro Forma Financial Information	The following unaudited pro forma consolidated financial information presents income statement results as if the acquisitions listed above had occurred on January 1, 2016: In thousands Three Months Ended Three Months Ended Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 Net sales $ 957,931 $ 995,869 $ 2,817,550 $ 3,168,195 Gross profit 253,203 301,554 799,695 977,743 Net income attributable to Wabtec shareholders 67,399 99,085 214,370 323,878 Diluted earnings per share As Reported $ 0.70 $ 0.91 $ 2.22 $ 2.92 Pro forma $ 0.70 $ 1.02 $ 2.23 $ 3.30

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2017
Inventory Disclosure [Abstract]
Components of Inventory, Net of Reserves	The components of inventory, net of reserves, were: In thousands September 30, December 31, Raw materials $ 391,207 $ 331,465 Work-in-progress 196,319 145,462 Finished goods 177,255 181,583 Total inventories $ 764,781 $ 658,510

Intangibles (Tables)

Intangibles (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Change in the Carrying Amount of Goodwill by Segment	The change in the carrying amount of goodwill by segment for the nine months ended September 30, 2017 is as follows: In thousands Freight Segment Transit Segment Total Balance at December 31, 2016 $ 550,902 $ 1,527,863 $ 2,078,765 Adjustment to preliminary purchase allocation (13,395 ) 77,302 63,907 Acquisitions 62,158 4,999 67,157 Foreign currency impact 9,407 165,522 174,929 Balance at September 30, 2017 $ 609,072 $ 1,775,686 $ 2,384,758
Intangible Assets of the Company, Other Than Goodwill and Trade Names	Intangible assets of the Company, other than goodwill and trade names, consist of the following: In thousands September 30, December 31, Patents, non-compete and other intangibles, net of accumulated amortization of $42,237 and $42,538 $ 15,001 $ 15,360 Customer relationships, net of accumulated amortization of $117,676 and $87,334 541,705 528,068 Total $ 556,706 $ 543,428
Amortization Expense	Amortization expense for the five succeeding years is estimated to be as follows: Remainder of 2017 $ 8,873 2018 34,794 2019 33,537 2020 32,014 2021 31,827

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Schedule of Long-term Debt	Long-term debt consisted of the following: In thousands September 30, December 31, 3.45% Senior Notes, due 2026, net of unamortized debt $ 747,590 $ 747,474 4.375% Senior Notes, due 2023, net of unamortized 248,502 248,310 Revolving Credit Facility, net of unamortized 855,321 796,150 Schuldschein Loan 11,812 98,671 Other Borrowings 9,150 1,153 Capital Leases 1,529 1,018 Total 1,873,904 1,892,776 Less - current portion 49,748 129,809 Long-term portion $ 1,824,156 $ 1,762,967

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2017
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Components of Net Periodic Benefit Cost	The following tables provide information regarding the Company’s defined benefit pension plans summarized by U.S. and international components. U.S. International Three Months Ended September 30, Three Months Ended September 30, In thousands, except percentages 2017 2016 2017 2016 Net periodic benefit cost Service cost $ 86 $ 84 $ 614 $ 258 Interest cost 356 369 1,677 1,257 Expected return on plan assets (433 ) (519 ) (2,910 ) (2,437 ) Net amortization/deferrals 248 229 685 397 Net periodic benefit cost $ 257 $ 163 $ 66 $ (525 ) U.S. International Nine Months Ended Nine Months Ended In thousands, except percentages 2017 2016 2017 2016 Net periodic benefit cost Service cost $ 258 $ 252 $ 1,842 $ 986 Interest cost 1,068 1,107 5,031 4,193 Expected return on plan assets (1,299 ) (1,557 ) (8,730 ) (7,723 ) Net amortization/deferrals 744 687 2,055 1,452 Curtailment loss recognized — — — 240 Net periodic benefit (credit) cost $ 771 $ 489 $ 198 $ (852 ) Assumptions Discount Rate 3.95 % 4.21 % 2.51 % 3.56 % Expected long-term rate of return 4.95 % 5.70 % 4.93 % 5.81 % Rate of compensation increase 3.00 % 3.00 % 2.54 % 3.10 %
Other Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Components of Net Periodic Benefit Cost	The following tables provide information regarding the Company’s postretirement benefit plans summarized by U.S. and international components. U.S. International Three Months Ended September 30, Three Months Ended September 30, In thousands, except percentages 2017 2016 2017 2016 Net periodic benefit cost Service cost $ 1 $ 1 $ 7 $ 7 Interest cost 88 97 24 25 Net amortization/deferrals (73 ) (105 ) (7 ) (9 ) Net periodic benefit (credit) cost $ 16 $ (7 ) $ 24 $ 23 U.S. International Nine Months Ended Nine Months Ended In thousands, except percentages 2017 2016 2017 2016 Net periodic benefit cost Service cost $ 3 $ 3 $ 21 $ 21 Interest cost 264 291 72 75 Net amortization/deferrals (219 ) (315 ) (21 ) (27 ) Net periodic (credit) benefit cost $ 48 $ (21 ) $ 72 $ 69 Assumptions Discount Rate 3.76 % 3.95 % 3.46 % 3.90 %

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Option Activity	The following table summarizes the Company’s stock option activity and related information for the 2011 Plan, the 2000 Plan and the Directors Plan for the nine months ended September 30, 2017 : Options Weighted Average Exercise Price Weighted Average Remaining Contractual Life Aggregate Intrinsic value (in thousands) Outstanding at December 31, 2016 1,098,823 $ 35.39 4.3 $ 52,332 Granted 65,522 87.09 0 Exercised (133,927 ) 21.84 7,220 Canceled (4,266 ) 72.91 13 Outstanding at September 30, 2017 1,026,152 40.30 4.1 36,377 Exercisable at September 30, 2017 838,004 32.15 3.4 36,537
Share-Based Fair Value of Each Option Grant Weighted-Average Assumptions	The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions: Nine Months Ended 2017 2016 Dividend yield 0.23 % 0.26 % Risk-free interest rate 2.17 % 1.47 % Stock price volatility 23.4 % 26.9 % Expected life (years) 5.0 5.0
Restricted Stock Activity and Incentive Stock Awards Activity	The following table summarizes the restricted stock activity and related information for the 2011 Plan, the 2000 Plan and the Directors Plan, and incentive stock units activity for the 2011 Plan and the 2000 Plan with related information for the nine months ended September 30, 2017 : Restricted Stock and Units Incentive Stock Units Weighted Average Grant Date Fair Value Outstanding at December 31, 2016 396,295 424,750 $ 72.18 Granted 153,571 157,025 86.11 Vested (131,553 ) (153,271 ) 70.02 Adjustment for incentive stock awards expected to vest — (100,424 ) 75.43 Canceled (6,590 ) (5,158 ) 74.99 Outstanding at September 30, 2017 411,723 322,922

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The computation of basic and diluted earnings per share for net income attributable to Wabtec shareholders is as follows: Three Months Ended In thousands, except per share data 2017 2016 Numerator Numerator for basic and diluted earnings per common share - net income attributable to Wabtec shareholders $ 67,399 $ 82,428 Less: dividends declared - common shares and non-vested restricted stock (11,518 ) (8,958 ) Undistributed earnings 55,881 73,470 Percentage allocated to common shareholders (1) 99.7 % 99.7 % 55,713 73,250 Add: dividends declared - common shares 11,485 8,933 Numerator for basic and diluted earnings per common share $ 67,198 $ 82,183 Denominator Denominator for basic earnings per common share - weighted average shares 95,709 89,589 Effect of dilutive securities: Assumed conversion of dilutive stock-based compensation plans 607 704 Denominator for diluted earnings per common share - adjusted weighted average shares and assumed conversion 96,316 90,293 Net income attributable to Wabtec shareholders per common share Basic $ 0.70 $ 0.92 Diluted $ 0.70 $ 0.91 (1) Basic weighted-average common shares outstanding 95,709 89,589 Basic weighted-average common shares outstanding and non-vested restricted stock expected to vest 95,983 89,838 Percentage allocated to common shareholders 99.7 % 99.7 % Nine Months Ended In thousands, except per share data 2017 2016 Numerator Numerator for basic and diluted earnings per common share - net income attributable to Wabtec shareholders $ 213,313 $ 267,076 Less: dividends declared - common shares and non-vested restricted stock (30,693 ) (23,523 ) Undistributed earnings 182,620 243,553 Percentage allocated to common shareholders (1) 99.4 % 99.7 % 181,524 242,822 Add: dividends declared - common shares 30,508 23,452 Numerator for basic and diluted earnings per common share $ 212,032 $ 266,274 Denominator Denominator for basic earnings per common share - weighted average shares 95,163 90,546 Effect of dilutive securities: Assumed conversion of dilutive stock-based compensation plans 645 770 Denominator for diluted earnings per common share - adjusted weighted average shares and assumed conversion 95,808 91,316 Net income attributable to Wabtec shareholders per common share Basic $ 2.23 $ 2.94 Diluted $ 2.22 $ 2.92 (1) Basic weighted-average common shares outstanding 95,163 90,546 Basic weighted-average common shares outstanding and non-vested restricted stock expected to vest 95,740 90,819 Percentage allocated to common shareholders 99.4 % 99.7 %

Warranties (Tables)

Warranties (Tables)	9 Months Ended
	Sep. 30, 2017
Product Warranties Disclosures [Abstract]
Changes in Product Warranty Reserve	The following table reconciles the changes in the Company’s product warranty reserve as follows: In thousands 2017 2016 Balance at beginning of year $ 138,992 $ 92,064 Warranty expense 33,108 22,788 Acquisitions 3,412 7,571 Warranty claim payments (33,492 ) (27,693 ) Foreign currency impact/other 6,744 (620 ) Balance at September 30 $ 148,764 $ 94,110

Derivative Financial Instrume35

Derivative Financial Instruments and Hedging (Tables)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Notional Amounts and Fair Value	The following table summarizes the gross notional amounts and fair values of the designated and non-designated hedges discussed in the above sections as of September 30, 2017 . In millions Designated Non-Designated Total Gross notional amount $ 728.7 $ 406.4 $ 1,135.1 Fair Value: Other current assets 4.4 0.2 4.6 Other current liabilities — — — Total $ 4.4 $ 0.2 $ 4.6 The following table summarizes the gross notional amounts and fair values of the designated and non-designated hedges discussed in the above sections as of December 31, 2016 . In millions Designated Non-Designated Total Gross notional amount $ 911.0 $ 490.0 $ 1,401.0 Fair Value: Other current assets 1.1 0.4 1.5 Other current liabilities (0.5 ) (0.2 ) (0.7 ) Total $ 0.6 $ 0.2 $ 0.8

Fair Value Measurement and Fa36

Fair Value Measurement and Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Liabilities Carried at Fair Value Measured on Recurring Basis	The following table provides the liabilities carried at fair value measured on a recurring basis as of September 30, 2017 , which are included in other current liabilities on the Condensed Consolidated Balance sheet: Fair Value Measurements at September 30, 2017 Using In thousands Total Carrying Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Interest rate swap agreements $ 1,952 $ — $ 1,952 $ — Total $ 1,952 $ — $ 1,952 $ — The following table provides the liabilities carried at fair value measured on a recurring basis as of December 31, 2016 , which is included in other current liabilities on the Condensed Consolidated Balance sheet: Fair Value Measurements at December 31, 2016 Using In thousands Total Carrying Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Interest rate swap agreements $ 3,888 $ — $ 3,888 $ — Total $ 3,888 $ — $ 3,888 $ —
Estimated Fair Values and Related Carrying Values of Financial Instruments	The estimated fair values and related carrying values of the Company’s financial instruments are as follows: September 30, 2017 December 31, 2016 In thousands Carry Value Fair Value Carry Fair Interest rate swap agreement $ 1,952 $ 1,952 $ 3,888 $ 3,888 4.375% Senior Notes 248,502 264,000 248,310 260,265 3.45% Senior Notes 747,590 739,050 747,474 719,273

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Segment Financial Information	Segment financial information for the three months ended September 30, 2017 is as follows: In thousands Freight Segment Transit Segment Corporate Activities and Elimination Total Sales to external customers $ 340,185 $ 617,746 $ — $ 957,931 Intersegment sales/(elimination) 8,376 4,494 (12,870 ) — Total sales $ 348,561 $ 622,240 $ (12,870 ) $ 957,931 Income (loss) from operations $ 61,596 $ 47,531 $ (7,116 ) $ 102,011 Interest expense and other, net — — (20,826 ) (20,826 ) Income (loss) from operations before income taxes $ 61,596 $ 47,531 $ (27,942 ) $ 81,185 Segment financial information for the three months ended September 30, 2016 is as follows: In thousands Freight Segment Transit Segment Corporate Activities and Elimination Total Sales to external customers $ 361,998 $ 313,576 $ — $ 675,574 Intersegment sales/(elimination) 10,341 1,823 (12,164 ) — Total sales $ 372,339 $ 315,399 $ (12,164 ) $ 675,574 Income (loss) from operations $ 77,999 $ 51,164 $ (9,067 ) $ 120,096 Interest expense and other, net — — (4,869 ) (4,869 ) Income (loss) from operations before income taxes $ 77,999 $ 51,164 $ (13,936 ) $ 115,227 Segment financial information for the nine months ended September 30, 2017 is as follows: In thousands Freight Segment Transit Segment Corporate Activities and Elimination Total Sales to external customers $ 1,032,959 $ 1,773,259 $ — $ 2,806,218 Intersegment sales/(elimination) 27,602 16,253 (43,855 ) — Total sales $ 1,060,561 $ 1,789,512 $ (43,855 ) $ 2,806,218 Income (loss) from operations $ 196,328 $ 155,901 $ (21,659 ) $ 330,570 Interest expense and other, net — — (53,191 ) (53,191 ) Income (loss) from operations before income taxes $ 196,328 $ 155,901 $ (74,850 ) $ 277,379 Segment financial information for the nine months ended September 30, 2016 is as follows: In thousands Freight Transit Corporate Total Sales to external customers $ 1,201,734 $ 969,472 $ — $ 2,171,206 Intersegment sales/(elimination) 29,765 7,606 (37,371 ) — Total sales $ 1,231,499 $ 977,078 $ (37,371 ) $ 2,171,206 Income (loss) from operations $ 276,990 $ 148,321 $ (29,750 ) $ 395,561 Interest expense and other, net — — (15,784 ) (15,784 ) Income (loss) from operations before income taxes $ 276,990 $ 148,321 $ (45,534 ) $ 379,777
Sales by Product	Sales by product line are as follows: Three Months Ended September 30, In thousands 2017 2016 Specialty Products & Electronics $ 335,143 $ 334,349 Transit Products 276,913 44,996 Brake Products 177,165 134,900 Remanufacturing, Overhaul & Build 132,018 129,264 Other 36,692 32,065 Total sales $ 957,931 $ 675,574 Nine Months Ended In thousands 2017 2016 Specialty Products & Electronics $ 975,006 $ 1,051,806 Transit Products 789,096 143,434 Brake Products 550,181 428,785 Remanufacturing, Overhaul & Build 387,634 444,278 Other 104,301 102,903 Total sales $ 2,806,218 $ 2,171,206

Guarantor Subsidiaries Financ38

Guarantor Subsidiaries Financial Information (Tables)	9 Months Ended
	Sep. 30, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Balance Sheet	Balance Sheet for September 30, 2017 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Cash and cash equivalents $ 3,049 $ 6,082 $ 218,949 $ — $ 228,080 Receivables, net 75,123 232,060 837,156 — 1,144,339 Inventories 132,044 140,745 491,992 — 764,781 Current assets - other 39,216 4,283 96,426 — 139,925 Total current assets 249,432 383,170 1,644,523 — 2,277,125 Property, plant and equipment, net 51,196 134,397 364,774 — 550,367 Goodwill 25,276 549,198 1,810,284 — 2,384,758 Investment in subsidiaries 6,304,037 2,508,725 — (8,812,762 ) — Other intangibles, net 30,905 251,485 857,997 — 1,140,387 Other long term assets 29,724 6,273 61,016 — 97,013 Total assets $ 6,690,570 $ 3,833,248 $ 4,738,594 $ (8,812,762 ) $ 6,449,650 Current liabilities $ 162,470 199,511 $ 1,103,459 — $ 1,465,440 Inter-company 2,031,256 (1,942,433 ) (88,823 ) — — Long-term debt 1,740,541 25 83,590 — 1,824,156 Long-term liabilities - other 38,601 87,935 297,149 — 423,685 Total liabilities 3,972,868 (1,654,962 ) 1,395,375 — 3,713,281 Shareholders' equity 2,717,702 5,489,597 3,323,165 (8,812,762 ) 2,717,702 Non-controlling interest — (1,387 ) 20,054 — 18,667 Total shareholders' equity $ 2,717,702 $ 5,488,210 $ 3,343,219 $ (8,812,762 ) $ 2,736,369 Total Liabilities and Shareholders' Equity $ 6,690,570 $ 3,833,248 $ 4,738,594 $ (8,812,762 ) $ 6,449,650 Balance Sheet for December 31, 2016 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Cash and cash equivalents $ 2,522 $ 9,496 $ 386,466 $ — $ 398,484 Receivables, net 79,041 202,779 660,688 — 942,508 Inventories 120,042 128,076 410,392 — 658,510 Current assets - other 52,576 (17,844 ) 833,397 — 868,129 Total current assets 254,181 322,507 2,290,943 — 2,867,631 Property, plant and equipment, net 49,031 126,661 342,684 — 518,376 Goodwill 25,275 477,472 1,576,018 — 2,078,765 Investment in subsidiaries 5,388,613 1,325,150 — (6,713,763 ) — Other intangibles, net 31,897 204,512 817,451 — 1,053,860 Other long term assets 9,592 (1,914 ) 54,708 — 62,386 Total assets $ 5,758,589 $ 2,454,388 $ 5,081,804 $ (6,713,763 ) $ 6,581,018 Current liabilities $ 194,983 196,956 $ 1,054,700 — $ 1,446,639 Inter-company 1,562,399 (1,848,777 ) 286,378 — — Long-term debt 1,761,933 58 976 — 1,762,967 Long-term liabilities - other 33,298 74,977 286,312 — 394,587 Total liabilities 3,552,613 (1,576,786 ) 1,628,366 — 3,604,193 Shareholders' equity 2,205,976 4,032,250 2,681,514 (6,713,763 ) 2,205,977 Non-controlling interest — (1,076 ) 771,924 — 770,848 Total shareholders' equity $ 2,205,976 $ 4,031,174 $ 3,453,438 $ (6,713,763 ) $ 2,976,825 Total Liabilities and Shareholders' Equity $ 5,758,589 $ 2,454,388 $ 5,081,804 $ (6,713,763 ) $ 6,581,018
Condensed Income Statement	Income Statement for the Three Months Ended September 30, 2017 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Net Sales $ 134,906 $ 270,116 $ 587,289 $ (34,380 ) $ 957,931 Cost of sales (111,775 ) (176,291 ) (444,704 ) 28,042 (704,728 ) Gross profit (loss) 23,131 93,825 142,585 (6,338 ) 253,203 Total operating expenses (22,714 ) (29,991 ) (98,487 ) — (151,192 ) Income (loss) from operations 417 63,834 44,098 (6,338 ) 102,011 Interest (expense) income, net (19,222 ) 1,143 186 — (17,893 ) Other income (expense), net 274 (356 ) (2,851 ) — (2,933 ) Equity earnings (loss) 80,874 19,806 — (100,680 ) — Pretax income (loss) 62,343 84,427 41,433 (107,018 ) 81,185 Income tax expense 5,056 (5 ) (17,797 ) — (12,746 ) Net income (loss) 67,399 84,422 23,636 (107,018 ) 68,439 Less: Net income attributable to noncontrolling interest — 155 (1,195 ) — (1,040 ) Net income (loss) attributable to Wabtec shareholders $ 67,399 $ 84,577 $ 22,441 $ (107,018 ) $ 67,399 Comprehensive income (loss) attributable to Wabtec shareholders $ 66,813 $ 84,577 $ 115,647 $ (107,018 ) $ 160,019 Income Statement for the Three Months Ended September 30, 2016 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Net Sales $ 155,731 $ 259,174 $ 295,336 $ (34,667 ) $ 675,574 Cost of sales (109,414 ) (186,546 ) (211,392 ) 44,259 (463,093 ) Gross profit (loss) 46,317 72,628 83,944 9,592 212,481 Total operating expenses (21,979 ) (29,019 ) (41,387 ) — (92,385 ) (Loss) income from operations 24,338 43,609 42,557 9,592 120,096 Interest (expense) income, net (7,854 ) 1,728 69 — (6,057 ) Other income (expense), net 6,600 (86 ) (5,326 ) — 1,188 Equity earnings (loss) 86,731 27,099 — (113,830 ) — Pretax income (loss) 109,815 72,350 37,300 (104,238 ) 115,227 Income tax expense (27,387 ) 1,567 (6,979 ) — (32,799 ) Net income (loss) 82,428 73,917 30,321 (104,238 ) 82,428 Less: Net income attributable to noncontrolling interest — — — — — Net income attributable to Wabtec shareholders $ 82,428 $ 73,917 $ 30,321 $ (104,238 ) $ 82,428 Comprehensive income (loss) attributable to Wabtec shareholders $ 82,987 $ 73,916 $ 34,054 $ (104,238 ) $ 86,719 Income Statement for the Nine Months Ended September 30, 2017 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Net Sales $ 417,156 $ 778,893 $ 1,708,646 $ (98,477 ) $ 2,806,218 Cost of sales (311,037 ) (503,686 ) (1,270,668 ) 76,046 (2,009,345 ) Gross profit (loss) 106,119 275,207 437,978 (22,431 ) 796,873 Total operating expenses (79,960 ) (89,935 ) (296,408 ) — (466,303 ) Income (loss) from operations 26,159 185,272 141,570 (22,431 ) 330,570 Interest (expense) income, net (52,565 ) 5,554 (4,014 ) — (51,025 ) Other income (expense), net 3,127 (2,233 ) (3,060 ) — (2,166 ) Equity earnings (loss) 246,103 69,954 — (316,057 ) — Pretax income (loss) 222,824 258,547 134,496 (338,488 ) 277,379 Income tax expense (9,511 ) (22 ) (55,243 ) — (64,776 ) Net income (loss) 213,313 258,525 79,253 (338,488 ) 212,603 Less: Net income attributable to noncontrolling interest — 311 399 — 710 Net income (loss) attributable to Wabtec shareholders $ 213,313 $ 258,836 $ 79,652 $ (338,488 ) $ 213,313 Comprehensive income (loss) attributable to Wabtec shareholders $ 214,482 $ 258,838 $ 366,156 $ (338,488 ) $ 500,988 Income Statement for the Nine Months Ended September 30, 2016 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Net Sales $ 494,350 $ 865,850 $ 924,559 $ (113,553 ) $ 2,171,206 Cost of sales (356,575 ) (561,361 ) (641,550 ) 93,330 (1,466,156 ) Gross profit (loss) 137,775 304,489 283,009 (20,223 ) 705,050 Total operating expenses (88,916 ) (91,967 ) (128,606 ) — (309,489 ) (Loss) income from operations 48,859 212,522 154,403 (20,223 ) 395,561 Interest (expense) income, net (21,608 ) 5,049 662 — (15,897 ) Other income (expense), net 17,640 (3,956 ) (13,571 ) — 113 Equity earnings (loss) 308,681 111,917 — (420,598 ) — Pretax income (loss) 353,572 325,532 141,494 (440,821 ) 379,777 Income tax expense (86,495 ) (380 ) (25,826 ) — (112,701 ) Net income (loss) 267,077 325,152 115,668 (440,821 ) 267,076 Less: Net income attributable to noncontrolling interest — — — — — Net income attributable to Wabtec shareholders $ 267,077 $ 325,152 $ 115,668 $ (440,821 ) $ 267,076 Comprehensive income (loss) attributable to Wabtec shareholders $ 266,355 $ 325,152 $ 107,054 $ (440,821 ) $ 257,740
Condensed Cash Flow Statement	Condensed Statement of Cash Flows for the Nine Months Ended September 30, 2017 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Net cash (used for) provided by operating activities $ (38,954 ) $ 115,816 $ (27,921 ) $ (22,430 ) $ 26,511 Net cash used for investing activities (12,591 ) (110,741 ) (26,492 ) — (149,824 ) Net cash provided by (used for) financing activities 52,072 (8,489 ) (136,062 ) 22,430 (70,049 ) Effect of changes in currency exchange rates — — 22,958 — 22,958 Increase (decrease) in cash 527 (3,414 ) (167,517 ) — (170,404 ) Cash, beginning of period 2,522 9,496 386,466 — 398,484 Cash, end of period $ 3,049 $ 6,082 $ 218,949 $ — $ 228,080 Condensed Statement of Cash Flows for the Nine Months Ended September 30, 2016 : In thousands Parent Guarantors Non-Guarantors Elimination Consolidated Net cash (used for) provided by operating activities $ (53,967 ) $ 220,963 $ 100,120 $ (20,223 ) $ 246,893 Net cash used for investing activities (5,067 ) (26,693 ) (84,131 ) — (115,891 ) Net cash provided by (used for) financing activities 70,272 (193,669 ) (9,162 ) 20,223 (112,336 ) Effect of changes in currency exchange rates — — 5,525 — 5,525 Increase (decrease) in cash 11,238 601 12,352 — 24,191 Cash, beginning of period — 13,157 213,034 — 226,191 Cash, end of period $ 11,238 $ 13,758 $ 225,386 $ — $ 250,382

Other Income (Expense), Net (Ta

Other Income (Expense), Net (Tables)	9 Months Ended
	Sep. 30, 2017
Other Income and Expenses [Abstract]
Components of Other Income (Expense)	The components of other income (expense) are as follows: Three Months Ended Nine Months Ended September 30, In thousands 2017 2016 2017 2016 Foreign currency (loss) gain $ (4,113 ) $ 880 $ (5,202 ) $ (488 ) Equity income 520 — 1,587 — Other miscellaneous expense 660 308 1,449 601 Total other income (expense), net $ (2,933 ) $ 1,188 $ (2,166 ) $ 113

Business - Additional Informati

Business - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017country
Product Information [Line Items]
Number of countries company operates	31
Sales Revenue Outside United States | Customer Concentration Risk
Product Information [Line Items]
Percent of revenue from customers outside the U.S. (as a percent)	65.00%
Minimum
Product Information [Line Items]
Number of countries where product is found (more than)	100

Accounting Policies - Additiona

Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Accounting Policies [Abstract]
Unbilled accounts receivable	$ 351,613		$ 351,613		$ 274,912
Customer deposits	373,815		373,815		256,591
Provisions for loss contracts	93,800		93,800		60,500
Deferred pre-production costs	28,800		28,800		$ 29,400
Net gain (loss) attributable to noncontrolling interest	$ 1,040	$ 0	$ (710)	$ 0

Accounting Policies - Accumulat

Accounting Policies - Accumulated Other Comprehensive Loss by Component, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			$ 2,205,977
Other comprehensive income (loss) before reclassifications			284,693	$ (11,546)
Amounts reclassified from accumulated other comprehensive income			2,982	2,210
Other comprehensive income (loss), net of tax	$ 92,620	$ 4,291	287,675	(9,336)
Ending balance	2,717,702		2,717,702
Foreign currency translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(321,033)	(227,349)
Other comprehensive income (loss) before reclassifications			277,984	(7,385)
Amounts reclassified from accumulated other comprehensive income			0	0
Other comprehensive income (loss), net of tax			277,984	(7,385)
Ending balance	(43,049)	(234,734)	(43,049)	(234,734)
Derivative contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(2,957)	(2,987)
Other comprehensive income (loss) before reclassifications			11,424	(2,192)
Amounts reclassified from accumulated other comprehensive income			1,206	883
Other comprehensive income (loss), net of tax			12,630	(1,309)
Ending balance	9,673	(4,296)	9,673	(4,296)
Pension and post retirement benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(55,615)	(46,383)
Other comprehensive income (loss) before reclassifications			(4,715)	(1,969)
Amounts reclassified from accumulated other comprehensive income			1,776	1,327
Other comprehensive income (loss), net of tax			(2,939)	(642)
Ending balance	(58,554)	(47,025)	(58,554)	(47,025)
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(379,605)	(276,719)
Ending balance	$ (91,930)	$ (286,055)	$ (91,930)	$ (286,055)

Accounting Policies - Reclassif

Accounting Policies - Reclassifications Out of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Cost of sales	$ 704,728	$ 463,093	$ 2,009,345	$ 1,466,156
Income from Operations	81,185	115,227	277,379	379,777
Income tax expense	(12,746)	(32,799)	(64,776)	(112,701)
Interest expense, net	(17,893)	(6,057)	(51,025)	(15,897)
Net income attributable to Wabtec shareholders	67,399	82,428	213,313	267,076
Reclassification out of Accumulated Other Comprehensive Income | Pension and post retirement benefit plans
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Income from Operations	818	617	2,454	1,901
Income tax expense	(226)	(175)	(678)	(574)
Net income attributable to Wabtec shareholders	592	442	1,776	1,327
Reclassification out of Accumulated Other Comprehensive Income | Amortization of initial net obligation and prior service cost
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Cost of sales	(422)	6	(1,266)	(801)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of net loss
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Cost of sales	1,240	611	3,720	2,702
Reclassification out of Accumulated Other Comprehensive Income | Derivative contracts
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Income tax expense	(131)	(96)	(447)	(382)
Interest expense, net	497	338	1,653	1,265
Net income attributable to Wabtec shareholders	$ 366	$ 242	$ 1,206	$ 883

Acquisitions - Additional Infor

Acquisitions - Additional Information (Details) shares in Millions	Oct. 02, 2017USD ($)	Mar. 21, 2017USD ($)	Mar. 06, 2017USD ($)	Feb. 03, 2017USD ($)	Nov. 30, 2016USD ($)employeecountry	Sep. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Mar. 21, 2017USD ($)shares	Jun. 30, 2017USD ($)	Sep. 30, 2017USD ($)	Apr. 05, 2017USD ($)	Mar. 14, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 14, 2016USD ($)	Nov. 30, 2016€ / shares	Nov. 17, 2016USD ($)	Aug. 01, 2016USD ($)	May 05, 2016USD ($)
Business Acquisition [Line Items]
Escrow deposits						$ 0				$ 0			$ 744,748,000
Adjustment to preliminary purchase allocation										63,907,000
Goodwill						2,384,758,000				2,384,758,000			2,078,765,000
Acquired indefinite-lived intangible assets						671,800,000				671,800,000
Customer Relationships
Business Acquisition [Line Items]
Acquired indefinite-lived intangible assets						296,700,000				$ 296,700,000
Intangible assets, weighted average useful life (years)										20 years
Noncompete Agreements
Business Acquisition [Line Items]
Intangible assets, weighted average useful life (years)										5 years
Intellectual Property
Business Acquisition [Line Items]
Acquired indefinite-lived intangible assets						5,000,000				$ 5,000,000
Intangible assets, weighted average useful life (years)										20 years
Trade Names
Business Acquisition [Line Items]
Acquired indefinite-lived intangible assets						367,600,000				$ 367,600,000
Faiveley Transport
Business Acquisition [Line Items]
Annual sales of Faiveley					$ 1,200,000,000
Number of employees (more than) | employee					5,700
Number of countries Faiveley operates in | country					24
Purchase price per share (in euros per share) | € / shares															€ 100
Outstanding share capital acquired (as a percent)															51.00%
Percentage of voting interests in Faiveley (as a percent)		100.00%	22.00%	27.00%				100.00%							49.00%
Share conversion ratio															1.1538
Additional share capital acquired (as a percent)			21.00%	27.00%
Cash payment for acquisition		$ 17,500,000	$ 303,200,000	$ 411,800,000				$ 944,300,000
Equity issued in acquisition			$ 300,000	$ 25,200,000				$ 560,200,000
Cumulative share capital acquired (as a percent)		100.00%	99.00%	78.00%				100.00%
Cumulative voting rights acquired (as a percent)		100.00%	98.00%	76.00%				100.00%
Business combination, consideration transferred								$ 1,736,100,000
Equity issued in acquisition (in shares) | shares								6.6
Debt assumed in acquisition								$ 409,900,000
Cash acquired in acquisition								178,300,000
Escrow deposits													$ 744,700,000
Acquisition of noncontrolling interest							$ 8,900,000
Adjustment to current liabilities acquired									$ 51,800,000
Accounts receivable		$ 444,741,000						444,741,000
Current liabilities		805,992,000						805,992,000
Adjustment to other noncurrent assets									29,000,000
Adjustment to preliminary purchase allocation									69,100,000
Accrued share based compensation acquired in acquisition						25,900,000				25,900,000
Revenue reported by acquired entity						294,400,000				851,800,000
Goodwill		$ 1,257,360,000						$ 1,257,360,000
Faiveley Transport | Customer Relationships
Business Acquisition [Line Items]
Adjustment to customer relationships acquired										21,800,000
Faiveley Transport | Restatement Adjustment | Fair Value of Receivables
Business Acquisition [Line Items]
Accounts receivable									2,800,000
Faiveley Transport | Restatement Adjustment | Fair Value of Current Liabilities
Business Acquisition [Line Items]
Current liabilities									36,200,000
Faiveley Transport | Restatement Adjustment | Fair Value of Assets Acquired and Liabilities Assumed
Business Acquisition [Line Items]
Accounts receivable									$ 64,300,000
Current liabilities							$ 64,300,000
Faiveley Transport | Minimum
Business Acquisition [Line Items]
Percentage of business acquisition consideration payable in cash (as a percent)															25.00%
Faiveley Transport | Maximum
Business Acquisition [Line Items]
Percentage of business acquisition consideration payable in cash (as a percent)															45.00%
Acquisitions other than Faiveley
Business Acquisition [Line Items]
Escrow deposits						$ 38,400,000				$ 38,400,000
TTC
Business Acquisition [Line Items]
Purchase price, net of cash acquired											$ 32,511,000
Goodwill											16,309,000
Goodwill tax deduction											$ 16,300,000
ATP
Business Acquisition [Line Items]
Purchase price, net of cash acquired												$ 65,254,000
Goodwill												31,934,000
Goodwill tax deduction												$ 31,900,000
Workhorse
Business Acquisition [Line Items]
Purchase price, net of cash acquired														$ 43,827,000
Goodwill														$ 24,373,000
Goodwill deductible for taxes (as a percent)														37.80%
Precision Turbo
Business Acquisition [Line Items]
Purchase price, net of cash acquired																$ 13,826,000
Goodwill																4,019,000
Goodwill tax deduction																$ 4,000,000
Unitrac
Business Acquisition [Line Items]
Purchase price, net of cash acquired																		$ 14,771,000
Goodwill																		2,442,000
Goodwill tax deduction																		$ 2,400,000
AM General Contractor | Subsequent Event
Business Acquisition [Line Items]
Annual sales of Faiveley	$ 25,000,000
Gerken
Business Acquisition [Line Items]
Purchase price, net of cash acquired																	$ 62,847,000
Goodwill																	17,470,000
Goodwill tax deduction																	$ 0

Acquisitions - Summary of Preli

Acquisitions - Summary of Preliminary Estimated Fair Values of Faiveley Transport Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 21, 2017	Dec. 31, 2016
Assets acquired
Goodwill	$ 2,384,758		$ 2,078,765
Faiveley Transport
Assets acquired
Cash and cash equivalents		$ 178,318
Accounts receivable		444,741
Inventories		205,649
Other current assets		70,930
Property, plant & equipment		148,746
Goodwill		1,257,360
Other assets		183,252
Total assets acquired		3,070,054
Liabilities assumed
Current liabilities		805,992
Debt		409,899
Other noncurrent liabilities		347,348
Total liabilities assumed		1,563,239
Net assets acquired		1,506,815
Faiveley Transport | Trade Names
Assets acquired
Intangible assets acquired		346,328
Faiveley Transport | Customer Relationships
Assets acquired
Intangible assets acquired		233,529
Faiveley Transport | Patents
Assets acquired
Intangible assets acquired		$ 1,201

Acquisitions - Summary of Pre46

Acquisitions - Summary of Preliminary Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Apr. 05, 2017	Mar. 14, 2017	Dec. 31, 2016	Dec. 14, 2016	Nov. 17, 2016	Aug. 01, 2016	May 05, 2016
Business Acquisition [Line Items]
Goodwill	$ 2,384,758			$ 2,078,765
TTC
Business Acquisition [Line Items]
Current assets		$ 3,746
Property, plant & equipment		5,909
Goodwill		16,309
Other intangible assets		12,300
Other assets		0
Total assets acquired		38,264
Total liabilities assumed		(5,753)
Net assets acquired		$ 32,511
ATP
Business Acquisition [Line Items]
Current assets			$ 11,666
Property, plant & equipment			5,354
Goodwill			31,934
Other intangible assets			22,100
Other assets			0
Total assets acquired			71,054
Total liabilities assumed			(5,800)
Net assets acquired			$ 65,254
Workhorse
Business Acquisition [Line Items]
Current assets					$ 9,137
Property, plant & equipment					0
Goodwill					24,373
Other intangible assets					19,400
Other assets					0
Total assets acquired					52,910
Total liabilities assumed					(9,083)
Net assets acquired					$ 43,827
Precision Turbo
Business Acquisition [Line Items]
Current assets						$ 4,145
Property, plant & equipment						1,346
Goodwill						4,019
Other intangible assets						5,200
Other assets						0
Total assets acquired						14,710
Total liabilities assumed						(884)
Net assets acquired						$ 13,826
Gerken
Business Acquisition [Line Items]
Current assets							$ 32,706
Property, plant & equipment							7,667
Goodwill							17,470
Other intangible assets							30,560
Other assets							1,706
Total assets acquired							90,109
Total liabilities assumed							(27,262)
Net assets acquired							$ 62,847
Unitrac
Business Acquisition [Line Items]
Current assets								$ 11,476
Property, plant & equipment								1,768
Goodwill								2,442
Other intangible assets								1,230
Other assets								0
Total assets acquired								16,916
Total liabilities assumed								(2,145)
Net assets acquired								$ 14,771

Acquisitions - Pro Forma Financ

Acquisitions - Pro Forma Financial Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Business Combinations [Abstract]
Net sales	$ 957,931	$ 995,869	$ 2,817,550	$ 3,168,195
Gross profit	253,203	301,554	799,695	977,743
Net income attributable to Wabtec shareholders	$ 67,399	$ 99,085	$ 214,370	$ 323,878
Diluted earnings per share
As Reported (in dollars per share)	$ 0.70	$ 0.91	$ 2.22	$ 2.92
Pro forma (in dollars per share)	$ 0.70	$ 1.02	$ 2.23	$ 3.30

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 391,207	$ 331,465
Work-in-progress	196,319	145,462
Finished goods	177,255	181,583
Total inventories	$ 764,781	$ 658,510

Intangibles - Change in the Car

Intangibles - Change in the Carrying Amount of Goodwill by Segment (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 2,078,765
Adjustment to preliminary purchase allocation	63,907
Acquisitions	67,157
Foreign currency impact	174,929
Ending balance	2,384,758
Freight Segment
Goodwill [Roll Forward]
Beginning balance	550,902
Adjustment to preliminary purchase allocation	(13,395)
Acquisitions	62,158
Foreign currency impact	9,407
Ending balance	609,072
Transit Segment
Goodwill [Roll Forward]
Beginning balance	1,527,863
Adjustment to preliminary purchase allocation	77,302
Acquisitions	4,999
Foreign currency impact	165,522
Ending balance	$ 1,775,686

Intangibles - Additional Inform

Intangibles - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Intangible Assets Disclosure [Line Items]
Trade names	$ 583,700		$ 583,700		$ 510,500
Intangible assets, amortization expense	$ 8,645	$ 5,339	$ 27,039	$ 16,100
Patents
Intangible Assets Disclosure [Line Items]
Intangible assets, weighted average useful life (years)			10 years
Customer Relationships
Intangible Assets Disclosure [Line Items]
Intangible assets, weighted average useful life (years)			17 years
Other Intangibles
Intangible Assets Disclosure [Line Items]
Intangible assets, weighted average useful life (years)			15 years

Intangibles - Intangible Assets

Intangibles - Intangible Assets Other Than Goodwill and Trade Names (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	$ 556,706	$ 543,428
Patents And Other
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	15,001	15,360
Intangible assets, accumulated amortization	42,237	42,538
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	541,705	528,068
Intangible assets, accumulated amortization	$ 117,676	$ 87,334

Intangibles - Amortization Expe

Intangibles - Amortization Expense (Detail) $ in Thousands	Sep. 30, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2017	$ 8,873
2,018	34,794
2,019	33,537
2,020	32,014
2,021	$ 31,827

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Nov. 03, 2016	Aug. 31, 2013
Debt Instrument [Line Items]
Capital Leases	$ 1,529	$ 1,018
Total	1,873,904	1,892,776
Less - current portion	(49,748)	(129,809)
Long-term portion	1,824,156	1,762,967
Revolving Credit Facility
Debt Instrument [Line Items]
Unamortized discount and debt issuance cost	2,801	3,850
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt	855,321	796,150
Other Borrowings
Debt Instrument [Line Items]
Long-term debt	9,150	1,153
Senior Notes Due 2026
Debt Instrument [Line Items]
Long-term debt	$ 747,590	$ 747,474
Stated interest rate (as a percent)	3.45%	3.45%
Unamortized discount and debt issuance cost	$ 2,410	$ 2,526
Senior Notes Due 2026 | Senior Notes
Debt Instrument [Line Items]
Long-term debt	747,590	747,474
Stated interest rate (as a percent)			3.45%
4.375% Senior Notes, due 2023
Debt Instrument [Line Items]
Long-term debt	$ 248,502	$ 248,310
Stated interest rate (as a percent)	4.375%	4.375%
Unamortized discount and debt issuance cost	$ 1,498	$ 1,690
4.375% Senior Notes, due 2023 | Senior Notes
Debt Instrument [Line Items]
Long-term debt	248,502	248,310
Stated interest rate (as a percent)				4.375%
Schuldschein Loan
Debt Instrument [Line Items]
Long-term debt	$ 11,812	$ 98,671

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Details)	Nov. 03, 2016USD ($)	Jun. 22, 2016USD ($)	Dec. 19, 2013USD ($)	Aug. 31, 2013USD ($)	Sep. 30, 2017USD ($)	Mar. 21, 2017USD ($)	Dec. 31, 2016USD ($)	Jun. 05, 2014USD ($)	Mar. 05, 2014USD ($)investor	Jan. 12, 2012USD ($)
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)					2.89%
Forward Starting Interest Rate Swap Agreement
Debt Instrument [Line Items]
Interest rate swap agreements, notional amount								$ 150,000,000		$ 150,000,000
Interest rate on notional value (as a percent)								2.56%		1.415%
Faiveley Transport
Debt Instrument [Line Items]
Acquired loans						$ 1,563,239,000
Senior Notes Due 2026
Debt Instrument [Line Items]
Stated interest rate (as a percent)					3.45%		3.45%
Long-term debt					$ 747,590,000		$ 747,474,000
4.375% Senior Notes, due 2023
Debt Instrument [Line Items]
Stated interest rate (as a percent)					4.375%		4.375%
Long-term debt					$ 248,502,000		$ 248,310,000
2016 Refinancing Credit Agreement
Debt Instrument [Line Items]
Deferred financing cost		$ 3,300,000
Minimum interest expense coverage ratio					3
Maximum debt to EBITDA ratio					3.25
2016 Refinancing Credit Agreement | Federal Funds Effective Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.50%
2016 Refinancing Credit Agreement | LIBOR Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					1.00%
2016 Refinancing Credit Agreement | Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.00%
2016 Refinancing Credit Agreement | Base Rate | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.00%
2016 Refinancing Credit Agreement | Base Rate | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.75%
2016 Refinancing Credit Agreement | Alternative Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					1.75%
2016 Refinancing Credit Agreement | Alternative Rate | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.75%
2016 Refinancing Credit Agreement | Alternative Rate | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					1.75%
2016 Refinancing Credit Agreement | Term Loan
Debt Instrument [Line Items]
Ticking fee		0.10%
2016 Refinancing Credit Agreement | Letter of Credit
Debt Instrument [Line Items]
Line of credit amount outstanding					$ 35,400,000
2013 Refinancing Credit Agreement
Debt Instrument [Line Items]
Deferred financing cost			$ 1,000,000
Debt instrument, basis spread on variable rate					1.00%
Basis spread on effective rate					0.50%
2013 Refinancing Credit Agreement | Base Rate | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.00%
2013 Refinancing Credit Agreement | Base Rate | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.75%
2013 Refinancing Credit Agreement | Alternative Rate | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					0.75%
2013 Refinancing Credit Agreement | Alternative Rate | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate					1.75%
Schuldschein Loan
Debt Instrument [Line Items]
Long-term debt					$ 11,812,000		98,671,000
Schuldschein Loan | Faiveley Transport
Debt Instrument [Line Items]
Stated interest rate (as a percent)					4.00%
Acquired loans									$ 137,200,000
Number of investors | investor									20
Repayments of debt					$ 125,800,000
Long-term debt					$ 11,800,000
Schuldschein Loan | March 2021 | Faiveley Transport
Debt Instrument [Line Items]
Original maturities					7 years
Senior Notes | Senior Notes Due 2026
Debt Instrument [Line Items]
Debt issued	$ 750,000,000
Debt issuance price (as a percent)	99.965%
Stated interest rate (as a percent)	3.45%
Deferred financing cost	$ 2,700,000
Long-term debt					$ 747,590,000		747,474,000
Senior Notes | 4.375% Senior Notes, due 2023
Debt Instrument [Line Items]
Debt issued				$ 250,000,000
Debt issuance price (as a percent)				99.879%
Stated interest rate (as a percent)				4.375%
Deferred financing cost				$ 2,600,000
Long-term debt					248,502,000		248,310,000
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt					855,321,000		$ 796,150,000
Line of Credit | 2016 Refinancing Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility, amount		$ 1,200,000,000
Credit facility loan term, years		5 years
Line of credit facility, amount currently available					$ 686,700,000
Line of Credit | 2016 Refinancing Credit Agreement | Term Loan
Debt Instrument [Line Items]
Revolving credit facility, amount		$ 400,000,000
Line of Credit | 2013 Refinancing Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility, amount			$ 800,000,000
Credit facility loan term, years			5 years

Employee Benefit Plans - Compon

Employee Benefit Plans - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
U.S. Defined Benefit Pension Plans
Net periodic benefit cost
Service cost	$ 86	$ 84	$ 258	$ 252
Interest cost	356	369	1,068	1,107
Expected return on plan assets	(433)	(519)	(1,299)	(1,557)
Net amortization/deferrals	248	229	744	687
Curtailment loss recognized			0	0
Net periodic benefit cost	257	163	$ 771	$ 489
Assumptions
Discount Rate			3.95%	4.21%
Expected long-term rate of return			4.95%	5.70%
Rate of compensation increase			3.00%	3.00%
International Defined Benefit Pension Plans
Net periodic benefit cost
Service cost	614	258	$ 1,842	$ 986
Interest cost	1,677	1,257	5,031	4,193
Expected return on plan assets	(2,910)	(2,437)	(8,730)	(7,723)
Net amortization/deferrals	685	397	2,055	1,452
Curtailment loss recognized			0	240
Net periodic benefit cost	66	(525)	$ 198	$ (852)
Assumptions
Discount Rate			2.51%	3.56%
Expected long-term rate of return			4.93%	5.81%
Rate of compensation increase			2.54%	3.10%
U.S. Post Retirement
Net periodic benefit cost
Service cost	1	1	$ 3	$ 3
Interest cost	88	97	264	291
Net amortization/deferrals	(73)	(105)	(219)	(315)
Net periodic benefit cost	16	(7)	$ 48	$ (21)
Assumptions
Discount Rate			3.76%	3.95%
International Post Retirement
Net periodic benefit cost
Service cost	7	7	$ 21	$ 21
Interest cost	24	25	72	75
Net amortization/deferrals	(7)	(9)	(21)	(27)
Net periodic benefit cost	$ 24	$ 23	$ 72	$ 69
Assumptions
Discount Rate			3.46%	3.90%

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)
International Defined Benefit Pension Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected plan contributions	$ 7.1
U.S. Defined Benefit Pension Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected plan contributions	$ 0.5

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended		12 Months Ended
	Dec. 31, 2019	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2018	Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 14.5	$ 14.8
Unamortized compensation expense expected to be vested		$ 29.7
Recognized weighted average period (in years)		1 year 4 months 26 days
Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 1.2
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		5.3
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		3.2
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 3.7
Award vesting period (in years)		3 years
Performance Shares | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of incentive stock awards expected to be vested and awarded of stocks granted (as a percent)		0.00%
Performance Shares | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of incentive stock awards expected to be vested and awarded of stocks granted (as a percent)		200.00%
Performance Shares | Scenario Forecast
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of incentive stock awards expected to be vested and awarded of stocks granted (as a percent)	80.00%			68.00%	73.00%
2011 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for grant (in shares)		3,800,000
2011 Plan | Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period (in years)		4 years
Plan term (in years)		10 years
2011 Plan | Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period (in years)		4 years
Directors Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 1.1
Directors Plan | Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period (in years)		1 year
2000 Plan | Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period (in years)		4 years
Plan term (in years)		10 years
2000 Plan | Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period (in years)		4 years

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Options Outstanding
Beginning balance (in shares)	1,098,823
Granted (in shares)	65,522
Exercised (in shares)	(133,927)
Canceled (in shares)	(4,266)
Ending balance (in shares)	1,026,152	1,098,823
Exercisable at period end (in shares)	838,004
Weighted-Average Exercise Price per Share
Beginning balance (in dollars per share)	$ 35.39
Granted (in dollars per share)	87.09
Exercised (in dollars per share)	21.84
Canceled (in dollars per share)	72.91
Ending balance (in dollars per share)	40.30	$ 35.39
Exercisable (in dollars per share)	$ 32.15
Weighted-Average Remaining Contractual Life
Outstanding, weighted average remaining contractual life (in years)	4 years 1 month 7 days	4 years 3 months 20 days
Exercisable weighted average remaining contractual life (in years)	3 years 4 months 26 days
Aggregate Intrinsic Value
Beginning balance	$ 52,332
Granted	0
Exercised	7,220
Canceled	13
Ending balance	36,377	$ 52,332
Exercisable	$ 36,537

Stock-Based Compensation - Fair

Stock-Based Compensation - Fair Value of Each Option Grant Weighted Average Assumptions (Detail)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Dividend yield (as a percent)	0.23%	0.26%
Risk-free interest rate (as a percent)	2.17%	1.47%
Stock price volatility (as a percent)	23.40%	26.90%
Expected life (years)	5 years	5 years

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock Activity and Incentive Stock Awards Activity (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, beginning of period (in dollars per share)		$ 72.18
Granted (in dollars per share)	$ 86.11
Vested (in dollars per share)	70.02
Adjustment for incentive stock awards expected to vest (in dollars per share)	75.43
Canceled (in dollars per share)	$ 74.99
Restricted Stock and Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, beginning of period (in shares)	396,295
Granted (in shares)	153,571
Vested (in shares)	(131,553)
Adjustment for incentive stock awards expected to vest (in shares)	0
Canceled (in shares)	(6,590)
Outstanding, end of period (in shares)	411,723
Incentive Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, beginning of period (in shares)	424,750
Granted (in shares)	157,025
Vested (in shares)	(153,271)
Adjustment for incentive stock awards expected to vest (in shares)	(100,424)
Canceled (in shares)	(5,158)
Outstanding, end of period (in shares)	322,922

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Effective income tax rate (as a percent)	15.70%	28.50%	23.40%	29.70%
Favorable deferred tax adjustment	$ 9.5
Liability for uncertain tax positions	5.7		$ 5.7
Unrecognized tax benefits if recognized that would affect effective tax rate	3.2		3.2
Accrued interest related to uncertain tax positions	0.6		0.6		$ 0.8
Accrued penalties related to uncertain tax positions	0.3		0.3		$ 0.3
Unrecognized tax benefits subject to change within the next 12 months	$ 3.6		$ 3.6

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator
Net income attributable to Wabtec shareholders	$ 67,399	$ 82,428	$ 213,313	$ 267,076
Less: dividends declared - common shares and non-vested restricted stock	(11,518)	(8,958)	(30,693)	(23,523)
Undistributed earnings	$ 55,881	$ 73,470	$ 182,620	$ 243,553
Percentage allocated to common shareholders (as a percent)	99.70%	99.70%	99.40%	99.70%
Undistributed earnings allocated to common shareholders	$ 55,713	$ 73,250	$ 181,524	$ 242,822
Add: dividends declared - common shares	11,485	8,933	30,508	23,452
Numerator for basic and diluted earnings per common share	$ 67,198	$ 82,183	$ 212,032	$ 266,274
Denominator
Basic weighted average common shares outstanding (in shares)	95,709	89,589	95,163	90,546
Assumed conversion of dilutive stock-based compensation plans (in shares)	607	704	645	770
Denominator for diluted earnings per common share - adjusted weighted average shares and assumed conversion (in shares)	96,316	90,293	95,808	91,316
Net income attributable to Wabtec shareholders per common share
Basic (in dollars per share)	$ 0.70	$ 0.92	$ 2.23	$ 2.94
Diluted (in dollars per share)	$ 0.70	$ 0.91	$ 2.22	$ 2.92
Basic weighted-average common shares outstanding and non-vested restricted stock expected to vest (in shares)	95,983	89,838	95,740	90,819

Warranties - Changes in Product

Warranties - Changes in Product Warranty Reserve (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance at beginning of year	$ 138,992	$ 92,064
Warranty expense	33,108	22,788
Acquisitions	3,412	7,571
Warranty claim payments	(33,492)	(27,693)
Foreign currency impact/other	6,744	(620)
Balance at end of period	$ 148,764	$ 94,110

Derivative Financial Instrume64

Derivative Financial Instruments and Hedging - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Interest rate swap agreements
Derivative [Line Items]
Interest rate swap agreement, current liability	$ 1,952		$ 1,952		$ 3,888
Non-Designated | Foreign Exchange Forward
Derivative [Line Items]
Derivative term (in years)			1 year
Unrealized gain (loss) on derivative contracts	200
Cash Flow Hedging | Designated | Foreign Currency Contracts
Derivative [Line Items]
Derivative term (in years)			2 years
Derivative instruments amounts reclassified into income	0	$ 0	$ 0	$ 0
Fair Value Hedging | Designated | Interest rate swap agreements
Derivative [Line Items]
Interest rate swap agreement, current liability	2,000		2,000
Accumulated other comprehensive loss	$ 1,200		$ 1,200

Derivative Financial Instrume65

Derivative Financial Instruments and Hedging - Summary of Notional Amounts and Fair Value (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Derivative [Line Items]
Gross notional amount	$ 1,135,100,000	$ 1,401,000,000
Total	4,600,000	800,000
Other current assets
Derivative [Line Items]
Derivative asset fair value	4,600,000	1,500,000
Other current liabilities
Derivative [Line Items]
Liabilities at fair value	0	(700,000)
Designated
Derivative [Line Items]
Gross notional amount	728,700,000	911,000,000
Total	4,400,000	600,000
Designated | Other current assets
Derivative [Line Items]
Derivative asset fair value	4,400,000	1,100,000
Designated | Other current liabilities
Derivative [Line Items]
Liabilities at fair value	0	(500,000)
Non-Designated
Derivative [Line Items]
Gross notional amount	406,400,000	490,000,000
Total	200,000	200,000
Non-Designated | Other current assets
Derivative [Line Items]
Derivative asset fair value	200,000	400,000
Non-Designated | Other current liabilities
Derivative [Line Items]
Liabilities at fair value	$ 0	$ (200,000)

Fair Value Measurement and Fa66

Fair Value Measurement and Fair Value of Financial Instruments - Liabilities Carried at Fair Value Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Measurements, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Interest rate swap agreement, current liability	$ 1,952	$ 3,888
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities at fair value	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities at fair value	1,952	3,888
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities at fair value	0	0
Interest rate swap agreements
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Interest rate swap agreement, current liability	1,952	3,888
Liabilities at fair value	1,952	3,888
Interest rate swap agreements | Fair Value, Measurements, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Interest rate swap agreement, current liability	1,952	3,888
Interest rate swap agreements | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities at fair value	0	0
Interest rate swap agreements | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities at fair value	1,952	3,888
Interest rate swap agreements | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities at fair value	$ 0	$ 0

Fair Value Measurement and Fa67

Fair Value Measurement and Fair Value of Financial Instruments - Estimated Fair Values and Related Carrying Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Interest rate swap agreements
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carry value	$ 1,952	$ 3,888
Fair value	1,952	3,888
4.375% Senior Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carry value	248,502	248,310
Fair value	$ 264,000	$ 260,265
Stated interest rate (as a percent)	4.375%	4.375%
3.45% Senior Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carry value	$ 747,590	$ 747,474
Fair value	$ 739,050	$ 719,273
Stated interest rate (as a percent)	3.45%	3.45%

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - Subsidiaries - Threatened Litigation	Sep. 08, 2017USD ($)	Sep. 30, 2017USD ($)claim
Denver Transit
Loss Contingencies [Line Items]
Number of claims filed (claims) | claim		0
Denver Transit, Delivery of Train Management System
Loss Contingencies [Line Items]
Damages alleged		$ 0
Denver Transit, Installation of Constant Wireless Crossings
Loss Contingencies [Line Items]
Damages alleged	$ 36,800,000

Segment Information - Additiona

Segment Information - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017segment
Segment Reporting [Abstract]
Number of reportable segments	2

Segment Information - Segment F

Segment Information - Segment Financial Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Total sales	$ 957,931	$ 675,574	$ 2,806,218	$ 2,171,206
Income (loss) from operations	102,011	120,096	330,570	395,561
Interest expense and other, net	(20,826)	(4,869)	(53,191)	(15,784)
Income from operations before income taxes	81,185	115,227	277,379	379,777
Freight Segment
Segment Reporting Information [Line Items]
Total sales	340,185	361,998	1,032,959	1,201,734
Income from operations before income taxes	61,596	77,999	196,328	276,990
Transit Segment
Segment Reporting Information [Line Items]
Total sales	617,746	313,576	1,773,259	969,472
Income from operations before income taxes	47,531	51,164	155,901	148,321
Operating Segments | Freight Segment
Segment Reporting Information [Line Items]
Total sales	348,561	372,339	1,060,561	1,231,499
Income (loss) from operations	61,596	77,999	196,328	276,990
Interest expense and other, net	0	0	0	0
Operating Segments | Transit Segment
Segment Reporting Information [Line Items]
Total sales	622,240	315,399	1,789,512	977,078
Income (loss) from operations	47,531	51,164	155,901	148,321
Interest expense and other, net	0	0	0	0
Intersegment sales/(elimination)
Segment Reporting Information [Line Items]
Total sales	(12,870)	(12,164)	(43,855)	(37,371)
Intersegment sales/(elimination) | Freight Segment
Segment Reporting Information [Line Items]
Total sales	8,376	10,341	27,602	29,765
Intersegment sales/(elimination) | Transit Segment
Segment Reporting Information [Line Items]
Total sales	4,494	1,823	16,253	7,606
Corporate Activities and Elimination
Segment Reporting Information [Line Items]
Total sales	(12,870)	(12,164)	(43,855)	(37,371)
Income (loss) from operations	(7,116)	(9,067)	(21,659)	(29,750)
Interest expense and other, net	(20,826)	(4,869)	(53,191)	(15,784)
Income from operations before income taxes	$ (27,942)	$ (13,936)	$ (74,850)	$ (45,534)

Segment Information - Sales by

Segment Information - Sales by Product (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Total sales	$ 957,931	$ 675,574	$ 2,806,218	$ 2,171,206
Specialty Products & Electronics
Segment Reporting Information [Line Items]
Total sales	335,143	334,349	975,006	1,051,806
Transit Products
Segment Reporting Information [Line Items]
Total sales	276,913	44,996	789,096	143,434
Brake Products
Segment Reporting Information [Line Items]
Total sales	177,165	134,900	550,181	428,785
Remanufacturing, Overhaul & Build
Segment Reporting Information [Line Items]
Total sales	132,018	129,264	387,634	444,278
Other
Segment Reporting Information [Line Items]
Total sales	$ 36,692	$ 32,065	$ 104,301	$ 102,903

Guarantor Subsidiaries Financ72

Guarantor Subsidiaries Financial Information - Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 228,080	$ 398,484	$ 250,382	$ 226,191
Receivables, net	1,144,339	942,508
Inventories	764,781	658,510
Current assets - other	139,925	868,129
Total current assets	2,277,125	2,867,631
Property, plant and equipment, net	550,367	518,376
Goodwill	2,384,758	2,078,765
Investment in subsidiaries	0	0
Other intangibles, net	1,140,387	1,053,860
Other noncurrent assets	97,013	62,386
Total Assets	6,449,650	6,581,018
Current liabilities	1,465,440	1,446,639
Inter-company	0	0
Long-term debt	1,824,156	1,762,967
Long-term liabilities - other	423,685	394,587
Total Liabilities	3,713,281	3,604,193
Shareholders' equity	2,717,702	2,205,977
Noncontrolling interest	18,667	770,848
Total Equity	2,736,369	2,976,825
Total Liabilities and Equity	6,449,650	6,581,018
Elimination
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	0	0
Receivables, net	0	0
Inventories	0	0
Current assets - other	0	0
Total current assets	0	0
Property, plant and equipment, net	0	0
Goodwill	0	0
Investment in subsidiaries	(8,812,762)	(6,713,763)
Other intangibles, net	0	0
Other noncurrent assets	0	0
Total Assets	(8,812,762)	(6,713,763)
Current liabilities	0	0
Inter-company	0	0
Long-term debt	0	0
Long-term liabilities - other	0	0
Total Liabilities	0	0
Shareholders' equity	(8,812,762)	(6,713,763)
Noncontrolling interest	0	0
Total Equity	(8,812,762)	(6,713,763)
Total Liabilities and Equity	(8,812,762)	(6,713,763)
Parent
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	3,049	2,522	11,238	0
Receivables, net	75,123	79,041
Inventories	132,044	120,042
Current assets - other	39,216	52,576
Total current assets	249,432	254,181
Property, plant and equipment, net	51,196	49,031
Goodwill	25,276	25,275
Investment in subsidiaries	6,304,037	5,388,613
Other intangibles, net	30,905	31,897
Other noncurrent assets	29,724	9,592
Total Assets	6,690,570	5,758,589
Current liabilities	162,470	194,983
Inter-company	2,031,256	1,562,399
Long-term debt	1,740,541	1,761,933
Long-term liabilities - other	38,601	33,298
Total Liabilities	3,972,868	3,552,613
Shareholders' equity	2,717,702	2,205,976
Noncontrolling interest	0	0
Total Equity	2,717,702	2,205,976
Total Liabilities and Equity	6,690,570	5,758,589
Guarantors
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	6,082	9,496	13,758	13,157
Receivables, net	232,060	202,779
Inventories	140,745	128,076
Current assets - other	4,283	(17,844)
Total current assets	383,170	322,507
Property, plant and equipment, net	134,397	126,661
Goodwill	549,198	477,472
Investment in subsidiaries	2,508,725	1,325,150
Other intangibles, net	251,485	204,512
Other noncurrent assets	6,273	(1,914)
Total Assets	3,833,248	2,454,388
Current liabilities	199,511	196,956
Inter-company	(1,942,433)	(1,848,777)
Long-term debt	25	58
Long-term liabilities - other	87,935	74,977
Total Liabilities	(1,654,962)	(1,576,786)
Shareholders' equity	5,489,597	4,032,250
Noncontrolling interest	(1,387)	(1,076)
Total Equity	5,488,210	4,031,174
Total Liabilities and Equity	3,833,248	2,454,388
Non-Guarantors
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	218,949	386,466	$ 225,386	$ 213,034
Receivables, net	837,156	660,688
Inventories	491,992	410,392
Current assets - other	96,426	833,397
Total current assets	1,644,523	2,290,943
Property, plant and equipment, net	364,774	342,684
Goodwill	1,810,284	1,576,018
Investment in subsidiaries	0	0
Other intangibles, net	857,997	817,451
Other noncurrent assets	61,016	54,708
Total Assets	4,738,594	5,081,804
Current liabilities	1,103,459	1,054,700
Inter-company	(88,823)	286,378
Long-term debt	83,590	976
Long-term liabilities - other	297,149	286,312
Total Liabilities	1,395,375	1,628,366
Shareholders' equity	3,323,165	2,681,514
Noncontrolling interest	20,054	771,924
Total Equity	3,343,219	3,453,438
Total Liabilities and Equity	$ 4,738,594	$ 5,081,804

Guarantor Subsidiaries Financ73

Guarantor Subsidiaries Financial Information - Condensed Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 957,931	$ 675,574	$ 2,806,218	$ 2,171,206
Cost of sales	(704,728)	(463,093)	(2,009,345)	(1,466,156)
Gross profit	253,203	212,481	796,873	705,050
Total operating expenses	(151,192)	(92,385)	(466,303)	(309,489)
Income from operations	102,011	120,096	330,570	395,561
Interest expense, net	(17,893)	(6,057)	(51,025)	(15,897)
Other income (expense), net	(2,933)	1,188	(2,166)	113
Equity earnings (loss)	0	0	0	0
Income from operations before income taxes	81,185	115,227	277,379	379,777
Income tax expense	(12,746)	(32,799)	(64,776)	(112,701)
Net income	68,439	82,428	212,603	267,076
Less: Net (Gain) Loss attributable to noncontrolling interest	(1,040)	0	710	0
Net income attributable to Wabtec shareholders	67,399	82,428	213,313	267,076
Comprehensive income attributable to Wabtec shareholders	160,019	86,719	500,988	257,740
Elimination
Condensed Financial Statements, Captions [Line Items]
Net sales	(34,380)	(34,667)	(98,477)	(113,553)
Cost of sales	28,042	44,259	76,046	93,330
Gross profit	(6,338)	9,592	(22,431)	(20,223)
Total operating expenses	0	0	0	0
Income from operations	(6,338)	9,592	(22,431)	(20,223)
Interest expense, net	0	0	0	0
Other income (expense), net	0	0	0	0
Equity earnings (loss)	(100,680)	(113,830)	(316,057)	(420,598)
Income from operations before income taxes	(107,018)	(104,238)	(338,488)	(440,821)
Income tax expense	0	0	0	0
Net income	(107,018)	(104,238)	(338,488)	(440,821)
Less: Net (Gain) Loss attributable to noncontrolling interest	0	0	0	0
Net income attributable to Wabtec shareholders	(107,018)	(104,238)	(338,488)	(440,821)
Comprehensive income attributable to Wabtec shareholders	(107,018)	(104,238)	(338,488)	(440,821)
Parent
Condensed Financial Statements, Captions [Line Items]
Net sales	134,906	155,731	417,156	494,350
Cost of sales	(111,775)	(109,414)	(311,037)	(356,575)
Gross profit	23,131	46,317	106,119	137,775
Total operating expenses	(22,714)	(21,979)	(79,960)	(88,916)
Income from operations	417	24,338	26,159	48,859
Interest expense, net	(19,222)	(7,854)	(52,565)	(21,608)
Other income (expense), net	274	6,600	3,127	17,640
Equity earnings (loss)	80,874	86,731	246,103	308,681
Income from operations before income taxes	62,343	109,815	222,824	353,572
Income tax expense	5,056	(27,387)	(9,511)	(86,495)
Net income	67,399	82,428	213,313	267,077
Less: Net (Gain) Loss attributable to noncontrolling interest	0	0	0	0
Net income attributable to Wabtec shareholders	67,399	82,428	213,313	267,077
Comprehensive income attributable to Wabtec shareholders	66,813	82,987	214,482	266,355
Guarantors
Condensed Financial Statements, Captions [Line Items]
Net sales	270,116	259,174	778,893	865,850
Cost of sales	(176,291)	(186,546)	(503,686)	(561,361)
Gross profit	93,825	72,628	275,207	304,489
Total operating expenses	(29,991)	(29,019)	(89,935)	(91,967)
Income from operations	63,834	43,609	185,272	212,522
Interest expense, net	1,143	1,728	5,554	5,049
Other income (expense), net	(356)	(86)	(2,233)	(3,956)
Equity earnings (loss)	19,806	27,099	69,954	111,917
Income from operations before income taxes	84,427	72,350	258,547	325,532
Income tax expense	(5)	1,567	(22)	(380)
Net income	84,422	73,917	258,525	325,152
Less: Net (Gain) Loss attributable to noncontrolling interest	155	0	311	0
Net income attributable to Wabtec shareholders	84,577	73,917	258,836	325,152
Comprehensive income attributable to Wabtec shareholders	84,577	73,916	258,838	325,152
Non-Guarantors
Condensed Financial Statements, Captions [Line Items]
Net sales	587,289	295,336	1,708,646	924,559
Cost of sales	(444,704)	(211,392)	(1,270,668)	(641,550)
Gross profit	142,585	83,944	437,978	283,009
Total operating expenses	(98,487)	(41,387)	(296,408)	(128,606)
Income from operations	44,098	42,557	141,570	154,403
Interest expense, net	186	69	(4,014)	662
Other income (expense), net	(2,851)	(5,326)	(3,060)	(13,571)
Equity earnings (loss)	0	0	0	0
Income from operations before income taxes	41,433	37,300	134,496	141,494
Income tax expense	(17,797)	(6,979)	(55,243)	(25,826)
Net income	23,636	30,321	79,253	115,668
Less: Net (Gain) Loss attributable to noncontrolling interest	(1,195)	0	399	0
Net income attributable to Wabtec shareholders	22,441	30,321	79,652	115,668
Comprehensive income attributable to Wabtec shareholders	$ 115,647	$ 34,054	$ 366,156	$ 107,054

Guarantor Subsidiaries Financ74

Guarantor Subsidiaries Financial Information - Condensed Cash Flow Statement (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Condensed Financial Statements, Captions [Line Items]
Net cash (used for) provided by operating activities	$ 26,511	$ 246,893
Net cash used for investing activities	(149,824)	(115,891)
Net cash provided by (used for) financing activities	(70,049)	(112,336)
Effect of changes in currency exchange rates	22,958	5,525
(Decrease) Increase in cash	(170,404)	24,191
Cash, beginning of period	398,484	226,191
Cash, end of period	228,080	250,382
Elimination
Condensed Financial Statements, Captions [Line Items]
Net cash (used for) provided by operating activities	(22,430)	(20,223)
Net cash used for investing activities	0	0
Net cash provided by (used for) financing activities	22,430	20,223
Effect of changes in currency exchange rates	0	0
(Decrease) Increase in cash	0	0
Cash, beginning of period	0	0
Cash, end of period	0	0
Parent
Condensed Financial Statements, Captions [Line Items]
Net cash (used for) provided by operating activities	(38,954)	(53,967)
Net cash used for investing activities	(12,591)	(5,067)
Net cash provided by (used for) financing activities	52,072	70,272
Effect of changes in currency exchange rates	0	0
(Decrease) Increase in cash	527	11,238
Cash, beginning of period	2,522	0
Cash, end of period	3,049	11,238
Guarantors
Condensed Financial Statements, Captions [Line Items]
Net cash (used for) provided by operating activities	115,816	220,963
Net cash used for investing activities	(110,741)	(26,693)
Net cash provided by (used for) financing activities	(8,489)	(193,669)
Effect of changes in currency exchange rates	0	0
(Decrease) Increase in cash	(3,414)	601
Cash, beginning of period	9,496	13,157
Cash, end of period	6,082	13,758
Non-Guarantors
Condensed Financial Statements, Captions [Line Items]
Net cash (used for) provided by operating activities	(27,921)	100,120
Net cash used for investing activities	(26,492)	(84,131)
Net cash provided by (used for) financing activities	(136,062)	(9,162)
Effect of changes in currency exchange rates	22,958	5,525
(Decrease) Increase in cash	(167,517)	12,352
Cash, beginning of period	386,466	213,034
Cash, end of period	$ 218,949	$ 225,386

Other Income (Expense), Net - C

Other Income (Expense), Net - Components of Other Income Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other Income and Expenses [Abstract]
Foreign currency (loss) gain	$ (4,113)	$ 880	$ (5,202)	$ (488)
Equity income	520	0	1,587	0
Other miscellaneous expense	660	308	1,449	601
Total other income (expense), net	$ (2,933)	$ 1,188	$ (2,166)	$ 113