Itron (ITRI) 10-Q 6 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	9 Months Ended
	Sep. 30, 2018	Oct. 31, 2018
Entity Information [Line Items]
Entity Registrant Name	ITRON INC /WA/
Entity Central Index Key	780,571
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Amendment Flag	false
Trading Symbol	ITRI
Entity Common Stock, Shares Outstanding		39,416,335

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Revenues	$ 595,962	$ 486,747	$ 1,789,073	$ 1,467,421
Cost of revenues
Cost of revenues	398,865	320,992	1,235,544	965,752
Gross profit	197,097	165,755	553,529	501,669
Operating expenses
Sales and marketing	47,204	40,529	144,573	126,298
Research and development	47,239	42,455	162,298	126,246
General and administrative	42,352	39,598	188,260	119,883
Amortization of intangible assets	17,960	5,625	53,699	15,144
Restructuring	666	(678)	82,908	7,417
Total operating expenses	155,421	127,529	631,738	394,988
Operating income (loss)	41,676	38,226	(78,209)	106,681
Other income (expense)
Interest income	431	729	1,725	1,468
Interest expense	(14,171)	(3,466)	(44,320)	(10,076)
Other income (expense), net	(2,434)	(1,995)	(2,598)	(7,951)
Total other income (expense)	(16,174)	(4,732)	(45,193)	(16,559)
Income (loss) before income taxes	25,502	33,494	(123,402)	90,122
Income tax benefit (provision)	(5,715)	(6,640)	1,692	(32,247)
Net income (loss)	19,787	26,854	(121,710)	57,875
Net income (loss) attributable to noncontrolling interests	(95)	1,278	1,417	2,357
Net income (loss) attributable to Itron, Inc.	$ 19,882	$ 25,576	$ (123,127)	$ 55,518
Earnings (loss) per common share - Basic (in dollars per share)	$ 0.51	$ 0.66	$ (3.14)	$ 1.44
Earnings (loss) per common share - Diluted (in dollars per share)	$ 0.50	$ 0.65	$ (3.14)	$ 1.41
Weighted average common shares outstanding - Basic (in shares)	39,340	38,713	39,177	38,624
Weighted average common shares outstanding - Diluted (in shares)	39,909	39,467	39,177	39,339
Product [Member]
Revenues
Revenues	$ 525,716	$ 433,984	$ 1,578,740	$ 1,321,062
Cost of revenues
Cost of revenues	357,194	284,762	1,106,586	865,288
Service [Member]
Revenues
Revenues	70,246	52,763	210,333	146,359
Cost of revenues
Cost of revenues	$ 41,671	$ 36,230	$ 128,958	$ 100,464

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 19,787	$ 26,854	$ (121,710)	$ 57,875
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(678)	14,930	(18,538)	50,393
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	908	126	2,563	187
Pension benefit obligation adjustment	392	410	1,207	1,004
Total other comprehensive income (loss), net of tax	622	15,466	(14,768)	51,584
Total comprehensive income (loss), net of tax	20,409	42,320	(136,478)	109,459
Comprehensive income (loss) attributable to noncontrolling interests, net of tax	(95)	1,278	1,417	2,357
Comprehensive income (loss) attributable to Itron, Inc.	$ 20,504	$ 41,042	$ (137,895)	$ 107,102

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 109,044	$ 176,274
Accounts receivable, net	449,592	398,029
Inventories	208,038	193,835
Other current assets	101,511	81,604
Total current assets	868,185	849,742
Property, plant, and equipment, net	220,795	200,768
Deferred tax assets, net	56,874	49,971
Restricted cash	2,055	311,010
Other long-term assets	48,746	43,666
Intangible assets, net	278,192	95,228
Goodwill	1,121,895	555,762
Total assets	2,596,742	2,106,147
Current liabilities
Accounts payable	274,950	262,166
Other current liabilities	72,385	56,736
Wages and benefits payable	101,491	90,505
Taxes payable	20,558	16,100
Current portion of debt	24,375	19,688
Current portion of warranty	29,736	21,150
Unearned revenue	92,350	41,438
Total current liabilities	615,845	507,783
Long-term debt	1,005,377	593,572
Long-term warranty	13,624	13,712
Pension benefit obligation	96,081	95,717
Deferred tax liabilities, net	1,462	1,525
Other long-term obligations	152,021	88,206
Total liabilities	1,884,410	1,300,515
Commitments and contingencies (Note 11)
Equity
Preferred stock, no par value, 10 million shares authorized, no shares issued or outstanding	0	0
Common stock, no par value, 75 million shares authorized, 39,400 and 38,771 shares issued and outstanding	1,326,719	1,294,767
Accumulated other comprehensive loss, net	(185,246)	(170,478)
Accumulated deficit	(449,273)	(337,873)
Total Itron, Inc. shareholders' equity	692,200	786,416
Noncontrolling interests	20,132	19,216
Total equity	712,332	805,632
Total liabilities and equity	$ 2,596,742	$ 2,106,147

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	39,400,000	38,771,000
Common stock, shares outstanding (in shares)	39,400,000	38,771,000
Preferred stock, no par value (in dollars per share)	$ 0
Preferred stock, shares authorized (in share)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating activities
Net income (loss)	$ (121,710)	$ 57,875
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	92,428	46,000
Stock-based compensation	23,069	15,254
Amortization of prepaid debt fees	5,825	800
Deferred taxes, net	(13,141)	7,615
Restructuring, non-cash	569	(720)
Other adjustments, net	(30)	3,111
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	7,774	2,537
Inventories	(10,072)	(30,843)
Other current assets	(9,797)	(23,492)
Other long-term assets	3,817	10,460
Accounts payable, other current liabilities, and taxes payable	4,494	34,987
Wages and benefits payable	2,166	6,218
Unearned revenue	27,869	(5,679)
Warranty	3,167	(10,285)
Other operating, net	50,955	663
Net cash provided by operating activities	67,383	114,501
Investing activities
Acquisitions of property, plant, and equipment	(42,493)	(33,493)
Business acquisitions, net of cash equivalents acquired	(803,075)	(98,848)
Other investing, net	(181)	10
Net cash used in investing activities	(845,749)	(132,331)
Financing activities
Proceeds from borrowings	611,938	35,000
Payments on debt	(182,297)	(24,844)
Issuance of common stock	8,283	2,797
Prepaid debt fees	(24,042)	0
Other financing, net	(5,526)	1,216
Net cash provided by financing activities	408,356	14,169
Effect of foreign exchange rate changes on cash, cash equivalents, and restricted cash	(6,175)	7,680
(Decrease) increase in cash, cash equivalents, and restricted cash	(376,185)	4,019
Cash, cash equivalents, and restricted cash at beginning of period	487,335	133,565
Cash, cash equivalents, and restricted cash at end of period	111,150	137,584
Supplemental disclosure of cash flow information:
Income taxes, net	6,367	25,423
Interest	$ 34,539	$ 7,629

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Financial Statement Preparation The condensed consolidated financial statements presented in this Quarterly Report on Form 10-Q are unaudited and reflect entries necessary for the fair presentation of the Consolidated Statements of Operations and the Consolidated Statements of Comprehensive Income (Loss) for the three and nine months ended September 30, 2018 and 2017 , the Consolidated Balance Sheets as of September 30, 2018 and December 31, 2017 , and the Consolidated Statements of Cash Flows for the nine months ended September 30, 2018 and 2017 of Itron, Inc. and its subsidiaries. All entries required for the fair presentation of the financial statements are of a normal recurring nature, except as disclosed. The results of operations for the three and nine months ended September 30, 2018 are not necessarily indicative of the results expected for the full year or for any other period. Certain information and notes normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) regarding interim results. These condensed consolidated financial statements should be read in conjunction with the audited financial statements and notes included in our 2017 Annual Report on Form 10-K filed with the SEC on February 28, 2018 . There have been no significant changes in financial statement preparation or significant accounting policies since December 31, 2017, with the exception of the adoption of Accounting Standards Codification (ASC) 606, Revenue from Contracts with Customers (ASC 606). On January 1, 2018, we adopted ASC 606 using the modified retrospective method applied to those contracts that were not completed. Results for reporting periods beginning after January 1, 2018 are presented under ASC 606, while prior period amounts are not adjusted and continue to be reported in accordance with our historic accounting under ASC 605, Revenue Recognition (ASC 605). The cumulative impact of adoption was a net decrease to accumulated deficit of $10.9 million as of January 1, 2018, with the impact primarily related to multiple element arrangements that contain software and software related elements. As we had not established vendor specific objective evidence of fair value for certain of our software and software related elements, we historically combined them as one unit of account and recognized the combined unit of account using the combined services approach. Under ASC 606, these software and software related elements are generally determined to be distinct performance obligations. As such, we are able to recognize revenue as we satisfy the performance obligations, either at a point in time or over time. For contracts that were modified prior to January 1, 2018, we have reflected the aggregate effect of all modifications prior to the date of initial adoption in order to identify the satisfied and unsatisfied performance obligations, determine the transaction price, and allocate the transaction price to satisfied and unsatisfied performance obligations. The impact to revenues for the three and nine months ended September 30, 2018 was immaterial as a result of applying ASC 606. Refer to the updated Revenue Recognition accounting policy described below and Note 16 for additional disclosures regarding our revenues from contracts with customers and the adoption of ASC 606. Reclassifications Certain reclassifications have been made to prior period consolidated financial statements to conform to classifications used in the current period. These reclassifications had no impact on net income (loss), shareholders' equity or cash flows as previously reported. Restricted Cash and Cash Equivalents Cash and cash equivalents that are contractually restricted from operating use are classified as restricted cash and cash equivalents. The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Consolidated Statements of Cash Flows: September 30, 2018 December 31, 2017 September 30, 2017 (in thousands) Cash and cash equivalents $ 109,044 $ 176,274 $ 137,584 Current restricted cash included in other current assets 51 51 — Long-term restricted cash 2,055 311,010 — Total cash, cash equivalents, and restricted cash $ 111,150 $ 487,335 $ 137,584 Revenue Recognition The majority of our revenues consist primarily of hardware sales, but may also include the license of software, software implementation services, cloud services and software as a service ("SaaS"), project management services, installation services, consulting services, post-sale maintenance support, and extended or noncustomary warranties. We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance, and collectability of consideration is probable. In determining whether the definition of a contract has been met, we will consider whether the arrangement creates enforceable rights and obligations, which involves evaluation of agreement terms that would allow for the customer to terminate the agreement. If the customer is able to terminate the agreement without providing further consideration to us, the agreement would not be considered to meet the definition of a contract. Many of our revenue arrangements involve multiple performance obligations consisting of hardware, meter reading system software, installation, and/or project management services. Separate contracts entered into with the same customer (or related parties of the customer) at or near the same time are accounted for as a single contract where one or more of the following criteria are met: • The contracts are negotiated as a package with a single commercial objective; • The amount of consideration to be paid in one contract depends on the price or performance of the other contract; or • The goods or services promised in the contracts (or some goods or services promised in each of the contracts) are a single performance obligation. Once the contract has been defined, we evaluate whether the promises in the contract should be accounted for as more than one performance obligation. This evaluation requires significant judgment, and the decision to separate the combined or single contract into multiple performance obligations could change the amount of revenue and profit recognized in a given period. For some of our contracts, the customer contracts with us to provide a significant service of integrating, customizing or modifying goods or services in the contract in which case the goods or services would be combined into a single performance obligation. It is common that we may promise to provide multiple distinct goods or services within a contract in which case we separate the contract into more than one performance obligation. If a contract is separated into more than one performance obligation, we allocate the total transaction price to each performance obligation in an amount based on the estimated relative standalone selling prices of the promised goods or services underlying each performance obligation. If applicable, for goods or services where we have observable standalone sales, the observable standalone sales are used to determine the standalone selling price. For the majority of our goods and services, we do not have observable standalone sales. As a result, we estimate the standalone selling price using either the adjusted market assessment approach or the expected cost plus a margin approach. Approaches used to estimate the standalone selling price for a given good or service will maximize the use of observable inputs and considers several factors, including our pricing practices, costs to provide a good or service, the type of good or service, and availability of other transactional data, among others. We determine the estimated standalone selling prices of goods or services used in our allocation of arrangement consideration on an annual basis or more frequently if there is a significant change in our business or if we experience significant variances in our transaction prices. Many of our contracts with customers include variable consideration, which can include liquidated damage provisions, rebates and volume and early payment discounts. Some of our contracts with customers contain clauses for liquidated damages related to the timing of delivery or milestone accomplishments, which could become material in an event of failure to meet the contractual deadlines. At the inception of the arrangement and on an ongoing basis, we evaluate the probability and magnitude of having to pay liquidated damages. We estimate variable consideration using the expected value method, taking into consideration contract terms, historical customer behavior and historical sales. In the case of liquidated damages, we also take into consideration progress towards meeting contractual milestones, including whether milestones have not been achieved, specified rates, if applicable, stated in the contract, and history of paying liquidated damages to the customer or similar customers. Variable consideration is included in the transaction price if, in our judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur. In the normal course of business, we do not accept product returns unless the item is defective as manufactured. We establish provisions for estimated returns and warranties. In addition, we do not typically provide customers with the right to a refund. Hardware revenues are recognized at a point in time. Transfer of control is typically at the time of shipment, receipt by the customer, or, if applicable, upon receipt of customer acceptance provisions. We will recognize revenue prior to receipt of customer acceptance for hardware in cases where the customer acceptance provision is determined to be a formality. Transfer of control would not occur until receipt of customer acceptance in hardware arrangements where such provisions are subjective or where we do not have history of meeting the acceptance criteria. Perpetual software licenses are considered to be a right to use intellectual property and are recognized at a point in time. Transfer of control is considered to be at the point at which it is available to the customer to download and use or upon receipt of customer acceptance. In certain contracts, software licenses may be sold with professional services that include implementation services that include a significant service of integrating, customizing or modifying the software. In these instances, the software license is combined into single performance obligation with the implementation services and recognized over time as the implementation services are performed. Hardware and software licenses (when not combined with professional services) are typically billed when shipped and revenue recognized at a point-in-time. As a result, the timing of revenue recognition and invoicing does not have a significant impact on contract assets and liabilities. Professional services, which include implementation, project management, installation, and consulting services are recognized over time. We measure progress towards satisfying these performance obligations using input methods, most commonly based on the costs incurred in relation to the total expected costs to provide the service. We expect this method to best depict our performance in transferring control of services promised to the customer or represents a reasonable proxy for measuring progress. The estimate of expected costs to provide services requires judgment. Cost estimates take into consideration past history and the specific scope requested by the customer and are updated quarterly. We may also offer professional services on a stand-ready basis over a specified period of time, in which case revenue would be recognized ratably over the term. Invoicing of these services is commensurate with performance and occurs on a monthly basis. As such, these services do not have a significant impact on contract assets and contract liabilities. Cloud services and SaaS arrangements where customers have access to certain of our software within a cloud-based IT environment that we manage, host and support are offered to customers on a subscription basis. Revenue for the cloud services and SaaS offerings are generally recognized over time, ratably over the contact term commencing with the date the services are made available to the customer. Services, including professional services, cloud services and SaaS arrangements, are commonly billed on a monthly basis in arrears and typically result in an unbilled receivable, which is not considered a contract asset as our right to consideration is unconditional. Certain of our revenue arrangements include an extended or noncustomary warranty provisions that covers all or a portion of a customer's replacement or repair costs beyond the standard or customary warranty period. Whether or not the extended warranty is separately priced in the arrangement, such warranties are considered to be a separate good or service, and a portion of the transaction price is allocated to this extended warranty performance obligation. This revenue is recognized, ratably over the extended warranty coverage period. Hardware and software post-sale maintenance support fees are recognized over time, ratably over the life of the related service contract. Shipping and handling costs and incidental expenses billed to customers are recognized as revenue, with the associated cost charged to cost of revenues. We recognize sales, use, and value added taxes billed to our customers on a net basis. Support fees are typically billed on an annual basis, resulting in a contract liability. Payment terms with customers can vary by customer; however, amounts billed are typically payable within 30 to 90 days, depending on the destination country. We do not make a practice of offering financing as part of our contracts with customers. We incur certain incremental costs to obtain contracts with customers, primarily in the form of sales commissions. Where the amortization period is one year or less, we have elected to apply the practical expedient and recognize the related commissions In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-02, Leases (Topic 842) (ASU 2016-02) , which requires substantially all leases be recognized by lessees on their balance sheet as a right-of-use asset and corresponding lease liability, including leases currently accounted for as operating leases. The new standard also will result in enhanced quantitative and qualitative disclosures, including significant judgments made by management, to provide greater insight into the extent of revenue and expense recognized and expected to be recognized from existing leases. The standard requires modified retrospective adoption and will be effective for annual reporting periods beginning after December 15, 2018, with early adoption permitted. In July 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases (ASU 2018-10), to clarify, improve, and correct various aspects of ASU 2016-02, and also issued ASU 2018-11, Targeted Improvements to Topic 842, Leases (ASU 2018-11), to simplify transition requirements and, for lessors, provide a practical expedient for the separation of nonlease components from lease components. The effective date and transition requirements in ASU 2018-10 and ASU 2018-11 are the same as the effective date and transition requirements of ASU 2016-02. We currently believe the most significant impact relates to our real estate leases and the increased financial statement disclosures, but are continuing to evaluate the effect that the updated standard will have on our consolidated results of operations, financial position, cash flows, and related financial statement disclosures. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) (ASU 2016-13), which replaces the incurred loss impairment methodology in current GAAP with a methodology based on expected credit losses. This estimate of expected credit losses uses a broader range of reasonable and supportable information. This change will result in earlier recognition of credit losses. ASU 2016-13 is effective for annual reporting periods, and interim periods within those years, beginning after December 15, 2019. We are currently evaluating the impact of this standard on our consolidated financial statements, including accounting policies, processes, and systems. In October 2016, the FASB issued ASU 2016-16, Income Taxes: Intra-Entity Transfers of Assets Other Than Inventory (Topic 740) (ASU 2016-16), which removes the prohibition in ASC 740 against the immediate recognition of the current and deferred income tax effects of intra-entity transfers of assets other than inventory. Under ASU 2016-16, the selling entity is required to recognize a current tax expense or benefit upon transfer of the asset. Similarly, the purchasing entity is required to recognize a deferred tax asset or deferred tax liability, as well as the related deferred tax benefit or expense, upon receipt of the asset. The resulting deferred tax asset or deferred tax liability is measured by computing the difference between the tax basis of the asset in the buyer's jurisdiction and its financial reporting carrying value in the consolidated financial statements and multiplying such difference by the enacted tax rate in the buyer's jurisdiction. ASU 2016-16 is effective for fiscal years beginning after December 15, 2017 with early adoption permitted. We adopted this standard effective January 1, 2018 using the modified retrospective transition method, recognizing a $0.9 million one-time decrease to accumulated deficit. In March 2017, the FASB issued ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (ASU 2017-07), which provides additional guidance on the presentation of net benefit costs in the income statement. ASU 2017-07 requires an employer disaggregate the service cost component from the other components of net benefit cost and to disclose other components outside of a subtotal of income from operations. It also allows only the service cost component of net benefit costs to be eligible for capitalization. ASU 2017-07 is effective for fiscal years beginning after December 15, 2017 with early adoption permitted. We adopted this standard on January 1, 2018 retrospectively for the presentation of the service cost component of net periodic pension cost in the statement of operations, and prospectively for the capitalization of the service cost component of net periodic pension cost. For applying the retrospective presentation requirements, we elected to utilize amounts previously disclosed in our defined benefit pension plan footnote for the prior comparative periods as the estimation basis for applying the retrospective presentation. This resulted in a reclassification of an immaterial amount of net periodic pension benefit costs from operating income to other income (expense) in all periods presented on the Consolidated Statements of Operations. In August 2017, the FASB issued ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities (ASU 2017-12), which amends and simplifies existing guidance in order to allow companies to more accurately present the economic effects of risk management activities in the financial statements. This update expands and refines hedge accounting for both nonfinancial and financial risk components and aligns the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. Additionally, the amendments in ASU 2017-12 provide new guidance about income statement classification and eliminates the requirement to separately measure and report hedge ineffectiveness. ASU 2017-12 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. We adopted this standard on April 1, 2018 and it did not materially impact our consolidated results of operations, financial position, cash flows, or related financial statement disclosures. In August 2018, the FASB issued ASU 2018-13, Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement (ASU 2018-13) which amends the disclosure requirements under ASC 820, Fair Value Measurements . ASU 2018-13 is effective for us beginning with our interim financial reports for the first quarter of 2020. In August 2018, the FASB issued ASU 2018-14, Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans (ASU 2018-14) which amends the disclosure requirements under ASC 715-20, Compensation—Retirement Benefits—Defined Benefit Plans

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The following table sets forth the computation of basic and diluted earnings (loss) per share (EPS): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands, except per share data) Net income (loss) available to common shareholders $ 19,882 $ 25,576 $ (123,127 ) $ 55,518 Weighted average common shares outstanding - Basic 39,340 38,713 39,177 38,624 Dilutive effect of stock-based awards 569 754 — 715 Weighted average common shares outstanding - Diluted 39,909 39,467 39,177 39,339 Earnings (loss) per common share - Basic $ 0.51 $ 0.66 $ (3.14 ) $ 1.44 Earnings (loss) per common share - Diluted $ 0.50 $ 0.65 $ (3.14 ) $ 1.41 Stock-based Awards For stock-based awards, the dilutive effect is calculated using the treasury stock method. Under this method, the dilutive effect is computed as if the awards were exercised at the beginning of the period (or at time of issuance, if later) and assumes the related proceeds were used to repurchase common stock at the average market price during the period. Related proceeds include the amount the employee must pay upon exercise and the future compensation cost associated with the stock award. Approximately 0.5 million and 1.1 million stock-based awards were excluded from the calculation of diluted EPS for the three and nine months ended September 30, 2018 , respectively, because they were anti-dilutive. Approximately 0.2 million stock-based awards were excluded from the calculation of diluted EPS for both the three and nine months ended September 30, 2017

Certain Balance Sheet Component

Certain Balance Sheet Components	9 Months Ended
	Sep. 30, 2018
Balance Sheet Related Disclosures [Abstract]
Certain Balance Sheet Components	Certain Balance Sheet Components A summary of accounts receivable from contracts with customers is as follows: Accounts receivable, net September 30, 2018 December 31, 2017 (in thousands) Trade receivables (net of allowance of $3,822 and $3,957) $ 422,567 $ 369,047 Unbilled receivables 27,025 28,982 Total accounts receivable, net $ 449,592 $ 398,029 Allowance for doubtful accounts activity Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Beginning balance $ 4,552 $ 3,502 $ 3,957 $ 3,320 Provision (recovery) for doubtful accounts, net (105 ) 769 1,149 1,513 Accounts written-off (624 ) (310 ) (1,129 ) (1,115 ) Effect of change in exchange rates (1 ) 30 (155 ) 273 Ending balance $ 3,822 $ 3,991 $ 3,822 $ 3,991 Inventories September 30, 2018 December 31, 2017 (in thousands) Materials $ 128,744 $ 126,656 Work in process 8,595 9,863 Finished goods 70,699 57,316 Total inventories $ 208,038 $ 193,835 Property, plant, and equipment, net September 30, 2018 December 31, 2017 (in thousands) Machinery and equipment $ 318,218 $ 310,753 Computers and software 112,681 104,384 Buildings, furniture, and improvements 149,934 135,566 Land 15,463 18,433 Construction in progress, including purchased equipment 41,423 39,946 Total cost 637,719 609,082 Accumulated depreciation (416,924 ) (408,314 ) Property, plant, and equipment, net $ 220,795 $ 200,768 Depreciation expense Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Depreciation expense $ 12,489 $ 10,907 $ 38,729 $ 30,856

Intangible Assets and Liabiliti

Intangible Assets and Liabilities	9 Months Ended
	Sep. 30, 2018
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible Assets and Liabilities	Intangible Assets and Liabilities The gross carrying amount and accumulated amortization (accretion) of our intangible assets and liabilities, other than goodwill, were as follows: September 30, 2018 December 31, 2017 Gross Accumulated (Amortization) Accretion Net Gross Accumulated Net (in thousands) Intangible Assets Core-developed technology $ 515,949 $ (427,069 ) $ 88,880 $ 429,548 $ (399,969 ) $ 29,579 Customer contracts and relationships 385,148 (210,735 ) 174,413 258,586 (197,582 ) 61,004 Trademarks and trade names 79,739 (69,376 ) 10,363 70,056 (66,004 ) 4,052 Other 12,602 (11,166 ) 1,436 11,661 (11,068 ) 593 Total intangible assets subject to amortization $ 993,438 $ (718,346 ) $ 275,092 $ 769,851 $ (674,623 ) $ 95,228 In-process research and development 3,100 — 3,100 — — — Total intangible assets $ 996,538 $ (718,346 ) $ 278,192 $ 769,851 $ (674,623 ) $ 95,228 Intangible Liabilities Customer contracts and relationships $ (23,900 ) $ 3,913 $ (19,987 ) $ — $ — $ — A summary of intangible assets and liabilities activity is as follows: Nine Months Ended September 30, 2018 2017 (in thousands) Beginning balance, intangible assets, gross $ 769,851 $ 669,896 Intangible assets acquired 242,039 36,500 Effect of change in exchange rates (15,352 ) 57,640 Ending balance, intangible assets, gross $ 996,538 $ 764,036 Beginning balance, intangible liabilities, gross $ — $ — Intangible liabilities acquired (23,900 ) — Effect of change in exchange rates — — Ending balance, intangible liabilities, gross $ (23,900 ) $ — On January 5, 2018, we completed our acquisition of Silver Spring Networks, Inc. (SSNI) by purchasing 100% of the voting stock. Intangible assets acquired in 2018 are primarily based on the preliminary purchase price allocation relating to this acquisition. Acquired intangible assets include in-process research and development (IPR&D), which is not amortized until such time as the associated development projects are completed. Of these projects, $11.3 million were completed during the nine months ended September 30, 2018 and are included in core-developed technology. The remaining IPR&D is expected to be completed in the next year. Acquired intangible liabilities reflect the present value of the projected cash outflows for an existing contract where remaining costs are expected to exceed projected revenues. Refer to Note 17 for additional information regarding this acquisition. Estimated future annual amortization (accretion) is as follows: Year Ending December 31, Amortization Accretion Estimated Annual Amortization, net (in thousands) 2018 (amount remaining at September 30, 2018) $ 19,547 $ (1,304 ) $ 18,243 2019 72,681 (8,233 ) 64,448 2020 52,727 (8,028 ) 44,699 2021 37,314 (1,963 ) 35,351 2022 27,160 (459 ) 26,701 Beyond 2022 65,663 — 65,663 Total intangible assets subject to amortization (accretion) $ 275,092 $ (19,987 ) $ 255,105 We have recognized $18.0 million and $5.6 million of net amortization of intangible assets for the three months ended September 30, 2018 and 2017 , respectively, and $53.7 million and $15.1 million for the nine months ended September 30, 2018 and 2017

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2018
Goodwill Excluding Non Goodwill Intangibles [Abstract]
Goodwill	Goodwill The following table reflects goodwill allocated to each reporting unit: Electricity Gas Water Networks Total Company (in thousands) Goodwill balance at January 1, 2018 Goodwill before impairment $ 500,625 $ 352,703 $ 378,901 $ — $ 1,232,229 Accumulated impairment losses (386,384 ) — (290,083 ) — (676,467 ) Goodwill, net 114,241 352,703 88,818 — 555,762 Goodwill acquired — — — 570,790 570,790 Effect of change in exchange rates (370 ) (3,259 ) (785 ) (243 ) (4,657 ) Goodwill balance at September 30, 2018 Goodwill before impairment 496,565 349,444 374,569 570,547 1,791,125 Accumulated impairment losses (382,694 ) — (286,536 ) — (669,230 ) Goodwill, net $ 113,871 $ 349,444 $ 88,033 $ 570,547 $ 1,121,895

Debt

Debt	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Debt	Debt The components of our borrowings were as follows: September 30, 2018 December 31, 2017 (in thousands) Credit facility: USD denominated term loan $ 641,875 $ 194,063 Multicurrency revolving line of credit 10,000 125,414 Senior notes 400,000 300,000 Total debt 1,051,875 619,477 Less: current portion of debt 24,375 19,688 Less: unamortized prepaid debt fees - term loan 5,208 629 Less: unamortized prepaid debt fees - senior notes 16,915 5,588 Long-term debt $ 1,005,377 $ 593,572 Credit Facility On January 5, 2018, we entered into a credit agreement providing for committed credit facilities in the amount of $1.2 billion U.S. dollars (the 2018 credit facility) which amended and restated in its entirety our credit agreement dated June 23, 2015 and replaced committed facilities in the amount of $725 million . The 2018 credit facility consists of a $650 million U.S. dollar term loan (the term loan) and a multicurrency revolving line of credit (the revolver) with a principal amount of up to $500 million . The revolver also contains a $300 million standby letter of credit sub-facility and a $50 million swingline sub-facility. Both the term loan and the revolver mature on January 5, 2023 and can be repaid without penalty. Amounts repaid on the term loan may not be reborrowed and amounts borrowed under the revolver may be repaid and reborrowed until the revolver's maturity, at which time all outstanding loans together with all accrued and unpaid interest must be repaid. Amounts not borrowed under the revolver are subject to a commitment fee, which is paid in arrears on the last day of each fiscal quarter, ranging from 0.18% to 0.35% per annum depending on our total leverage ratio as of the most recently ended fiscal quarter. The 2018 credit facility permits us and certain of our foreign subsidiaries to borrow in U.S. dollars, euros, British pounds, or, with lender approval, other currencies readily convertible into U.S. dollars. All obligations under the 2018 credit facility are guaranteed by Itron, Inc. and material U.S. domestic subsidiaries and are secured by a pledge of substantially all of the assets of Itron, Inc. and material U.S. domestic subsidiaries, including a pledge of their related assets. This includes a pledge of 100% of the capital stock of material U.S. domestic subsidiaries and up to 66% of the voting stock (100% of the non-voting stock) of first-tier foreign subsidiaries. In addition, the obligations of any foreign subsidiary who is a foreign borrower, as defined by the 2018 credit facility, are guaranteed by the foreign subsidiary and by its direct and indirect foreign parents. The 2018 credit facility includes debt covenants, which contain certain financial thresholds and place certain restrictions on the incurrence of debt, investments, and the issuance of dividends. We were in compliance with the debt covenants under the 2018 credit facility at September 30, 2018 . Under the 2018 credit facility, we elect applicable market interest rates for both the term loan and any outstanding revolving loans. We also pay an applicable margin, which is based on our total leverage ratio as defined in the credit agreement. The applicable rates per annum may be based on either: (1) the LIBOR rate or EURIBOR rate (subject to a floor of 0%), plus an applicable margin, or (2) the Alternate Base Rate , plus an applicable margin. The Alternate Base Rate election is equal to the greatest of three rates: (i) the prime rate , (ii) the Federal Reserve effective rate plus 0.50%, or (iii) one-month LIBOR plus 1.00% . At September 30, 2018 , the interest rate for both the term loan and revolver was 4.25% , which includes the LIBOR rate plus a margin of 2.00% . Senior Notes On December 22, 2017 and January 19, 2018, we issued $300 million and $100 million , respectively, of aggregate principal amount of 5.00% senior notes maturing January 15, 2026 (Notes). The proceeds were used to refinance existing indebtedness related to the acquisition of SSNI, pay related fees and expenses, and for general corporate purposes. Interest on the Notes is payable semi-annually in arrears on January 15 and July 15, commencing on July 15, 2018. The Notes are fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by each of our subsidiaries that guarantee the senior credit facilities. Prior to maturity we may redeem some or all of the Notes, together with accrued and unpaid interest, if any, plus a "make-whole" premium. On or after January 15, 2021, we may redeem some or all of the Notes at any time at declining redemption prices equal to 102.50% beginning on January 15, 2021, 101.25% beginning on January 15, 2022 and 100.00% beginning on January15, 2023 and thereafter to the applicable redemption date. In addition, before January 15, 2021, and subject to certain conditions, we may redeem up to 35% of the aggregate principal amount of Notes with the net proceeds of certain equity offerings at 105.00% of the principal amount thereof to the date of redemption; provided that (i) at least 65% of the aggregate principal amount of Notes remains outstanding after such redemption and (ii) the redemption occurs within 60 days of the closing of any such equity offering. Debt Maturities The amount of required minimum principal payments on our long-term debt in aggregate over the next five years, are as follows: Year Ending December 31, Minimum Payments (in thousands) 2018 (amount remaining at September 30, 2018) $ 4,063 2019 28,438 2020 44,777 2021 60,937 2022 65,000 2023 448,660 Total minimum payments on debt $ 651,875

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments As part of our risk management strategy, we use derivative instruments to hedge certain foreign currency and interest rate exposures. Refer to Note 13 and Note 14 for additional disclosures on our derivative instruments. The fair values of our derivative instruments are determined using the income approach and significant other observable inputs (also known as "Level 2"). We have used observable market inputs based on the type of derivative and the nature of the underlying instrument. The key inputs include interest rate yield curves (swap rates and futures) and foreign exchange spot and forward rates, all of which are available in an active market. We have utilized the mid-market pricing convention for these inputs. We include, as a discount to the derivative asset, the effect of our counterparty credit risk based on current published credit default swap rates when the net fair value of our derivative instruments is in a net asset position. We consider our own nonperformance risk when the net fair value of our derivative instruments is in a net liability position by discounting our derivative liabilities to reflect the potential credit risk to our counterparty through applying a current market indicative credit spread to all cash flows. The fair values of our derivative instruments were as follows: Fair Value Derivative Assets Balance Sheet Location September 30, 2018 December 31, 2017 Derivatives designated as hedging instruments under Subtopic 815-20 (in thousands) Interest rate swap contract Other current assets $ 2,051 $ 658 Interest rate cap contracts Other current assets 607 17 Cross currency swap contract Other current assets 1,711 — Interest rate swap contract Other long-term assets 1,733 1,712 Interest rate cap contracts Other long-term assets 728 179 Cross currency swap contract Other long-term assets 738 — Derivatives not designated as hedging instruments under Subtopic 815-20 Foreign exchange forward contracts Other current assets 69 41 Interest rate cap contracts Other current assets — 25 Interest rate cap contracts Other long-term assets — 268 Total asset derivatives $ 7,637 $ 2,900 Derivative Liabilities Derivatives not designated as hedging instruments under Subtopic 815-20 Foreign exchange forward contracts Other current liabilities $ 240 $ 289 The changes in accumulated other comprehensive income (loss) (AOCI), net of tax, for our derivative and nonderivative hedging instruments, were as follows: 2018 2017 (in thousands) Net unrealized gain (loss) on hedging instruments at January 1, $ (13,414 ) $ (14,337 ) Unrealized gain (loss) on hedging instruments 4,770 (295 ) Realized loss (gain) reclassified into net income (2,207 ) 482 Net unrealized gain (loss) on hedging instruments at September 30, $ (10,851 ) $ (14,150 ) Reclassification of amounts related to hedging instruments are included in interest expense in the Consolidated Statements of Operations for the periods ended September 30, 2018 and 2017 . Included in the net unrealized gain (loss) on hedging instruments at September 30, 2018 and 2017 is a loss of $14.4 million , net of tax, related to our nonderivative net investment hedge, which terminated in 2011. This loss on our net investment hedge will remain in AOCI until such time when earnings are impacted by a sale or liquidation of the associated foreign operation. A summary of the effect of netting arrangements on our financial position related to the offsetting of our recognized derivative assets and liabilities under master netting arrangements or similar agreements is as follows: Offsetting of Derivative Assets Gross Amounts of Recognized Assets Presented in the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheets Derivative Financial Instruments Cash Collateral Received Net Amount (in thousands) September 30, 2018 $ 7,637 $ (102 ) $ — $ 7,535 December 31, 2017 $ 2,900 $ (90 ) $ — $ 2,810 Offsetting of Derivative Liabilities Gross Amounts of Recognized Liabilities Presented in the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheets Derivative Financial Instruments Cash Collateral Pledged Net Amount (in thousands) September 30, 2018 $ 240 $ (102 ) $ — $ 138 December 31, 2017 $ 289 $ (90 ) $ — $ 199 Our derivative assets and liabilities subject to netting arrangements consist of foreign exchange forward and interest rate contracts with five counterparties at September 30, 2018 and three counterparties at December 31, 2017 . No derivative asset or liability balance with any of our counterparties was individually significant at September 30, 2018 or December 31, 2017 . Our derivative contracts with each of these counterparties exist under agreements that provide for the net settlement of all contracts through a single payment in a single currency in the event of default. We have no pledges of cash collateral against our obligations nor have we received pledges of cash collateral from our counterparties under the associated derivative contracts. Cash Flow Hedges As a result of our floating rate debt, we are exposed to variability in our cash flows from changes in the applicable interest rate index. We enter into interest rate caps and swaps to reduce the variability of cash flows from increases in the LIBOR based borrowing rates on our floating rate credit facility. These instruments do not protect us from changes to the applicable margin under our credit facility. At September 30, 2018 , our LIBOR-based debt balance was $652.0 million . In October 2015, we entered into an interest rate swap, which is effective from August 31, 2016 to June 23, 2020, and converts $214 million of our LIBOR based debt from a floating LIBOR interest rate to a fixed interest rate of 1.42% (excluding the applicable margin on the debt). The notional balance will amortize to maturity at the same rate as required minimum payments on our term loan. Changes in the fair value of the interest rate swap are recognized as a component of other comprehensive income (OCI) and are recognized in earnings when the hedged item affects earnings. The amounts paid or received on the hedge are recognized as an adjustment to interest expense along with the earnings effect of the hedged item. The amount of net gains expected to be reclassified into earnings in the next 12 months is $2.1 million . In November 2015, we entered into three interest rate cap contracts with a total notional amount of $100 million at a cost of $1.7 million . The interest rate cap contracts expire on June 23, 2020 and were entered into in order to limit our interest rate exposure on $100 million of our variable LIBOR based debt up to 2.00% . In the event LIBOR is higher than 2.00% , we will pay interest at the capped rate of 2.00% with respect to the $100 million notional amount of such agreements. As of December 31, 2016, due to the accelerated revolver payments from surplus cash, we elected to de-designate two of the interest rate cap contracts as cash flow hedges and discontinued the use of cash flow hedge accounting. The amounts recognized in AOCI from de-designated interest rate cap contracts were maintained in AOCI as the forecasted transactions were still probable to occur, and subsequent changes in fair value were recognized within interest expense. In April 2018, due to increases in our total LIBOR-based debt, we elected to re-designate the two interest rate cap contracts as cash flow hedges. Future changes in the fair value of these instruments will be recognized as a component of OCI, and these changes together with amounts previously maintained in AOCI will be recognized in earnings when the hedged item affects earnings. The amounts paid or received on the hedge are recognized as an adjustment to interest expense along with the earnings effect of the hedged item. The amount of net losses expected to be reclassified into earnings for all interest rate cap contracts in the next 12 months is $0.1 million . In April 2018, we entered into a cross-currency swap which converts $56.0 million of floating LIBOR-based U.S. Dollar denominated debt into 1.38% fixed rate euro denominated debt. This cross-currency swap matures on April 30, 2021 and mitigates the risk associated with fluctuations in currency rates impacting cash flows related to U.S. Dollar denominated debt in a euro functional currency entity. Changes in the fair value of the cross-currency swap are recognized as a component of OCI and will be recognized in earnings when the hedged item affects earnings. The amounts paid or received on the hedge are recognized as an adjustment to interest expense along with the earnings effect of the hedged item. The amount of net gains expected to be reclassified into earnings in the next 12 months is $1.7 million . The before-tax effects of our accounting for derivative instruments designated as hedges on AOCI were as follows: Derivatives in Subtopic 815-20 Cash Flow Hedging Relationships Amount of Gain (Loss) Recognized in OCI on Derivative Gain (Loss) Reclassified from AOCI into Income Location Amount 2018 2017 2018 2017 (in thousands) (in thousands) Three Months Ended September 30, Interest rate swap contract $ 302 $ 81 Interest expense $ 314 $ (92 ) Interest rate cap contracts (220 ) (24 ) Interest expense (149 ) (55 ) Cross currency swap contract 599 — Interest expense 363 — Cross currency swap contract — — Other income/(expense), net (733 ) — Nine Months Ended September 30, Interest rate swap contract $ 2,062 $ (255 ) Interest expense $ 649 $ (637 ) Interest rate cap contracts 149 (225 ) Interest expense (685 ) (148 ) Cross currency swap contract 2,975 — Interest expense 570 — Cross currency swap contract — — Other income/(expense), net 1,635 — These reclassification amounts presented above also represent the loss (gain) recognized in net income (loss) on hedging relationships under Subtopic 815-20 on the Consolidated Statements of Operations. For the three and nine months ended September 30, 2018 and 2017, there were no amounts reclassified from AOCI as a result that a forecasted transaction is no longer probable of occurring, and no amounts excluded from effectiveness testing recognized in earnings based on changes in fair value. Derivatives Not Designated as Hedging Relationships We are also exposed to foreign exchange risk when we enter into non-functional currency transactions, both intercompany and third party. At each period-end, non-functional currency monetary assets and liabilities are revalued with the change recognized to other income and expense. We enter into monthly foreign exchange forward contracts, which are not designated for hedge accounting, with the intent to reduce earnings volatility associated with currency exposures. As of September 30, 2018 , a total of 52 contracts were offsetting our exposures from the Euro, Pound Sterling, Mexican Peso, Chinese Yuan, Canadian Dollar, Hungarian Forint and various other currencies , with notional amounts ranging from $183,000 to $55.5 million . The effect of our derivative instruments not designated as hedges on the Consolidated Statements of Operations was as follows: Derivatives Not Designated as Hedging Instrument under Subtopic 815-20 Location Gain (Loss) Recognized on Derivatives in Other Income (Expense) 2018 2017 Three Months Ended September 30, (in thousands) Foreign exchange forward contracts Other income (expense), net $ (1,149 ) $ (1,760 ) Interest rate cap contracts Interest expense — (36 ) Nine Months Ended September 30, Foreign exchange forward contracts Other income (expense), net $ 964 $ (5,565 ) Interest rate cap contracts Interest expense 377 (337 )

Defined Benefit Pension Plans

Defined Benefit Pension Plans	9 Months Ended
	Sep. 30, 2018
Defined Benefit Plan [Abstract]
Defined Benefit Pension Plans	Defined Benefit Pension Plans We sponsor both funded and unfunded defined benefit pension plans offering death and disability, retirement, and special termination benefits for our international employees, primarily in Germany, France, Italy, Indonesia, Brazil, and Spain. The defined benefit obligation is calculated annually by using the projected unit credit method. The measurement date for the pension plans was December 31, 2017 . Amounts recognized on the Consolidated Balance Sheets consist of: September 30, 2018 December 31, 2017 (in thousands) Assets Plan assets in other long-term assets $ 911 $ 991 Liabilities Current portion of pension benefit obligation in wages and benefits payable 3,091 3,260 Long-term portion of pension benefit obligation 96,081 95,717 Pension benefit obligation, net $ 98,261 $ 97,986 Our asset investment strategy focuses on maintaining a portfolio using primarily insurance funds, which are accounted for as investments and measured at fair value, in order to achieve our long-term investment objectives on a risk adjusted basis. Our general funding policy for these qualified pension plans is to contribute amounts sufficient to satisfy regulatory funding standards of the respective countries for each plan. Net periodic pension benefit costs for our plans include the following components: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Service cost $ 1,008 $ 994 $ 3,025 $ 2,846 Interest cost 567 568 1,767 1,628 Expected return on plan assets (160 ) (152 ) (510 ) (445 ) Amortization of actuarial net loss 383 431 1,178 1,225 Amortization of unrecognized prior service costs 16 16 50 46 Net periodic benefit cost $ 1,814 $ 1,857 $ 5,510 $ 5,300

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation We maintain the Second Amended and Restated 2010 Stock Incentive Plan (Stock Incentive Plan), which allows us to grant stock-based compensation awards, including stock options, restricted stock units, phantom stock, and unrestricted stock units. Under the Stock Incentive Plan, we have 12,623,538 shares of common stock reserved and authorized for issuance subject to stock splits, dividends, and other similar events. At September 30, 2018 , 6,449,209 shares were available for grant under the Stock Incentive Plan. We issue new shares of common stock upon the exercise of stock options or when vesting conditions on restricted stock units are fully satisfied. These shares are subject to a fungible share provision such that the authorized share reserve is reduced by (i) one share for every one share subject to a stock option or share appreciation right granted under the Plan and (ii) 1.7 shares for every one share of common stock that was subject to an award other than an option or share appreciation right. As part of the acquisition of SSNI, we reserved and authorized 2,880,039 shares, collectively, of Itron common stock to be issued under the Stock Incentive Plan for certain SSNI common stock awards that were converted to Itron common stock awards on January 5, 2018 (Acquisition Date) pursuant to the Agreement and Plan of Merger or were available for issuance pursuant to future awards under the Silver Spring Networks, Inc. 2012 Equity Incentive Plan (SSNI Plan). New stock-based compensation awards originally from the SSNI Plan may only be made to individuals who were not employees of Itron as of the Acquisition Date. Notwithstanding the foregoing, there is no fungible share provision for shares originally from the SSNI Plan. We also periodically award phantom stock units, which are settled in cash upon vesting and accounted for as liability-based awards with no impact to the shares available for grant. In addition, we maintain the Employee Stock Purchase Plan (ESPP), for which 305,979 shares of common stock were available for future issuance at September 30, 2018 . Unrestricted stock and ESPP activity for the three and nine months ended September 30, 2018 and 2017 was not significant. Stock-Based Compensation Expense Total stock-based compensation expense and the related tax benefit were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Stock options $ 911 $ 717 $ 2,694 $ 1,974 Restricted stock units 5,381 4,170 19,803 12,538 Unrestricted stock awards 158 232 572 742 Phantom stock units 762 626 2,039 1,510 Total stock-based compensation $ 7,212 $ 5,745 $ 25,108 $ 16,764 Related tax benefit $ 1,259 $ 1,192 $ 4,387 $ 3,520 Stock Options A summary of our stock option activity is as follows: Shares Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Life Aggregate Intrinsic Value Weighted Average Grant Date Fair Value (in thousands) (years) (in thousands) Outstanding, January 1, 2017 959 $ 45.64 6.6 $ 19,125 Granted 135 65.94 $ 21.98 Exercised (36 ) 38.68 972 Forfeited (35 ) 47.38 Expired (47 ) 67.43 Outstanding, September 30, 2017 976 $ 47.60 6.5 $ 30,320 Outstanding, January 1, 2018 956 $ 47.10 6.3 $ 21,965 Converted upon acquisition 42 51.86 $ 14.86 Granted 117 68.90 $ 24.55 Exercised (151 ) 38.98 4,509 Forfeited (3 ) 68.43 Expired (66 ) 95.31 Outstanding, September 30, 2018 895 $ 47.92 6.6 $ 15,332 Exercisable September 30, 2018 590 $ 42.53 5.6 $ 12,867 Expected to vest, September 30, 2018 305 $ 58.35 8.5 $ 2,466 At September 30, 2018 , total unrecognized stock-based compensation expense related to nonvested stock options was $3.5 million , which is expected to be recognized over a weighted average period of approximately 1.6 years . The weighted-average assumptions used to estimate the fair value of stock options granted and the resulting weighted average fair value are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Expected volatility 28.6 % 29.0 % 30.6 % 32.5 % Risk-free interest rate 2.9 % 1.8 % 2.8 % 2.0 % Expected term (years) 6.1 5.5 6.1 5.5 Restricted Stock Units The following table summarizes restricted stock unit activity: Number of Restricted Stock Units Weighted Average Grant Date Fair Value Aggregate Intrinsic Value (in thousands) (in thousands) Outstanding, January 1, 2017 701 Granted 141 $ 65.54 Released (340 ) $ 13,097 Forfeited (23 ) Outstanding, September 30, 2017 479 Outstanding, January 1, 2018 556 $ 47.68 Converted upon acquisition 579 69.40 Granted 262 65.22 Released (494 ) 54.08 $ 26,753 Forfeited (102 ) 68.15 Outstanding, September 30, 2018 801 62.57 Vested but not released, September 30, 2018 9 $ 586 Expected to vest, September 30, 2018 741 $ 47,554 At September 30, 2018 , total unrecognized compensation expense on restricted stock units was $46.0 million , which is expected to be recognized over a weighted average period of approximately 2.1 years . The weighted-average assumptions used to estimate the fair value of performance-based restricted stock units granted and the resulting weighted average fair value are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Expected volatility N/A 27.9 % 28.0 % 28.0 % Risk-free interest rate N/A 1.4 % 2.2 % 1.0 % Expected term (years) N/A 2.3 2.1 1.7 Weighted average fair value N/A $ 80.64 $ 78.56 $ 77.75 There were no performance-based restricted stock units granted for the three months ended September 30, 2018 . Phantom Stock Units The following table summarizes phantom stock unit activity: Number of Phantom Stock Units Weighted Average Grant Date Fair Value (in thousands) Outstanding, January 1, 2017 62 Granted 32 $ 65.55 Released (20 ) Forfeited (7 ) Outstanding, September 30, 2017 67 Expected to vest, September 30, 2017 67 Outstanding, January 1, 2018 63 $ 51.88 Converted upon acquisition 21 69.40 Granted 37 68.06 Released (34 ) 53.55 Forfeited (3 ) 56.47 Outstanding, September 30, 2018 84 62.53 Expected to vest, September 30, 2018 84 At September 30, 2018 , total unrecognized compensation expense on phantom stock units was $3.9 million which is expected to be recognized over a weighted average period of approximately 2.0 years . As of both September 30, 2018 and December 31, 2017 , we have recognized a phantom stock liability of $1.7 million

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We determine the interim tax benefit (provision) by applying an estimate of the annual effective tax rate to the year-to-date pretax book income (loss) and adjusting for discrete items during the reporting period, if any. Tax jurisdictions with losses for which tax benefits cannot be realized are excluded. Our tax rate for the three and nine months ended September 30, 2018 of 22% and 1% , respectively, differed from the federal statutory rate of 21% due primarily to unbenefitted losses experienced in jurisdictions with valuation allowances on deferred tax assets as well as the forecasted mix of earnings in domestic and international jurisdictions, a benefit related to excess stock-based compensation, and uncertain tax positions. Our tax rate for the three and nine months ended September 30, 2017 of 20% and 36% respectively, differed from the federal statutory rate of 35% due to the forecasted mix of earnings in domestic and international jurisdictions, a benefit related to excess stock-based compensation, and losses experienced in jurisdictions with valuation allowances on deferred tax assets. The tax provision for December 31, 2017 included the provisional determination of the impact to our deferred tax positions of the Tax Cuts and Jobs Act. We will continue to review any additional guidance issued by the U.S. Department of the Treasury, Internal Revenue Service, Financial Accounting Standards Board, or other regulatory bodies and adjust our provisional amount during the measurement period, which should not extend beyond one year from the enactment date of December 22, 2017. For the three and nine months ended September 30, 2018 , no changes to these provisional amounts have been recognized. We classify interest expense and penalties related to unrecognized tax liabilities and interest income on tax overpayments as components of income tax expense. The net interest and penalties expense recognized were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Net interest and penalties expense (benefit) $ 414 $ (746 ) $ 1,152 $ (334 ) Accrued interest and penalties recognized were as follows: September 30, 2018 December 31, 2017 (in thousands) Accrued interest $ 3,707 $ 2,706 Accrued penalties 2,396 2,426 Unrecognized tax benefits related to uncertain tax positions and the amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate were as follows: September 30, 2018 December 31, 2017 (in thousands) Unrecognized tax benefits related to uncertain tax positions $ 78,332 $ 56,702 The amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate 76,958 55,312 The increase in unrecognized tax benefits at September 30, 2018 related primarily to $16.7 million of unrecognized tax benefits recognized through purchase accounting on January 5, 2018 as a result of the acquisition of SSNI. At September 30, 2018 , we are under examination by certain tax authorities for the 2010 to 2016 tax years. The material jurisdictions where we are subject to examination include, among others, the United States, France, Germany, Italy, Brazil and the United Kingdom. No material changes have occurred to previously disclosed assessments. We believe we have appropriately accrued for the expected outcome of all tax matters and do not currently anticipate that the ultimate resolution of these examinations will have a material adverse effect on our financial condition, future results of operations, or liquidity.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Guarantees and Indemnifications We are often required to obtain standby letters of credit (LOCs) or bonds in support of our obligations for customer contracts. These standby LOCs or bonds typically provide a guarantee to the customer for future performance, which usually covers the installation phase of a contract and may, on occasion, cover the operations and maintenance phase of outsourcing contracts. Our available lines of credit, outstanding standby LOCs, and performance bonds were as follows: September 30, 2018 December 31, 2017 (in thousands) Credit facilities Multicurrency revolving line of credit $ 500,000 $ 500,000 Long-term borrowings (10,000 ) (125,414 ) Standby LOCs issued and outstanding (41,108 ) (31,881 ) Net available for additional borrowings under the multi-currency revolving line of credit $ 448,892 $ 342,705 Net available for additional standby LOCs under sub-facility 258,892 218,119 Unsecured multicurrency revolving lines of credit with various financial institutions Multicurrency revolving lines of credit $ 106,281 $ 110,477 Standby LOCs issued and outstanding (19,577 ) (21,030 ) Short-term borrowings (180 ) (916 ) Net available for additional borrowings and LOCs $ 86,524 $ 88,531 Unsecured surety bonds in force $ 96,157 $ 51,344 In the event any such standby LOC or bond is called, we would be obligated to reimburse the issuer of the standby LOC or bond; however, we do not believe that any outstanding LOC or bond will be called. A summary of the warranty accrual account activity is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Beginning balance $ 43,719 $ 39,810 $ 34,862 $ 43,302 Assumed liabilities from acquisition — — 5,742 — New product warranties 869 2,708 3,151 6,637 Other adjustments and expirations 659 (4,346 ) 9,141 (2,445 ) Claims activity (2,164 ) (3,773 ) (8,981 ) (14,372 ) Effect of change in exchange rates 277 523 (555 ) 1,800 Ending balance 43,360 34,922 43,360 34,922 Less: current portion of warranty 29,736 21,697 29,736 21,697 Long-term warranty $ 13,624 $ 13,225 $ 13,624 $ 13,225 Total warranty expense is classified within cost of revenues and consists of new product warranties issued, costs related to extended warranty contracts, insurance and supplier recoveries, and other changes and adjustments to warranties. Warranty expense (benefit) was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Total warranty expense (benefit) $ 1,528 $ (3,148 ) $ 12,291 $ (5,318 ) Warranty expense increased during the nine months ended September 30, 2018 compared with the same periods in 2017 primarily due to an insurance recovery in our Water operating segment of $8.0 million We are self-insured for a substantial portion of the cost of our U.S. employee group health insurance. We purchase insurance from a third party, which provides individual and aggregate stop loss protection for these costs. Each reporting period, we expense the costs of our health insurance plan including paid claims, the change in the estimate of incurred but not reported (IBNR) claims, taxes, and administrative fees (collectively, the plan costs). Plan costs were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Plan costs $ 9,205 $ 6,096 $ 25,559 $ 21,592 The IBNR accrual, which is included in wages and benefits payable, was as follows: September 30, 2018 December 31, 2017 (in thousands) IBNR accrual $ 3,449 $ 2,664

Restructuring

Restructuring	9 Months Ended
	Sep. 30, 2018
Restructuring and Related Activities [Abstract]
Restructuring	Restructuring 2018 Projects On February 22, 2018, our Board of Directors approved a restructuring plan (the 2018 Projects) to continue our efforts to optimize our global supply chain and manufacturing operations, research and development, and sales and marketing organizations. We expect to substantially complete the plan by the end of 2020. Many of the affected employees are represented by unions or works councils, which require consultation, and potential restructuring projects may be subject to regulatory approval, both of which could impact the timing of charges, total expected charges, cost recognized, and planned savings in certain jurisdictions. The total expected restructuring costs, the restructuring costs recognized, and the remaining expected restructuring costs related to the 2018 Projects are as follows: Total Expected Costs at September 30, 2018 Costs Recognized During the Nine Months Ended Expected Remaining Costs to be Recognized at September 30, 2018 (in thousands) Employee severance costs $ 81,669 $ 81,669 $ — Asset impairments & net loss on sale or disposal 115 115 — Other restructuring costs 19,356 1,280 18,076 Total $ 101,140 $ 83,064 $ 18,076 Segments: Electricity $ 20,609 $ 19,109 $ 1,500 Gas 52,289 41,583 10,706 Water 21,804 15,934 5,870 Corporate unallocated 6,438 6,438 — Total $ 101,140 $ 83,064 $ 18,076 2016 Projects On September 1, 2016, we announced projects (2016 Projects) to restructure various company activities in order to improve operational efficiencies, reduce expenses and improve competitiveness. We expect to close or consolidate several facilities and reduce our global workforce as a result of the restructuring. The 2016 Projects were initiated during the third quarter of 2016, and we expect to substantially complete the 2016 Projects by the end of 2018. The total expected restructuring costs, the restructuring costs recognized, and the remaining expected restructuring costs related to the 2016 Projects are as follows: Total Expected Costs at September 30, 2018 Costs Recognized in Prior Periods Costs Recognized During the Nine Months Ended Expected Remaining Costs to be Recognized at September 30, 2018 (in thousands) Employee severance costs $ 37,197 $ 39,855 $ (2,658 ) $ — Asset impairments & net loss on sale or disposal 5,375 4,922 453 — Other restructuring costs 16,064 9,435 2,049 4,580 Total $ 58,636 $ 54,212 $ (156 ) $ 4,580 Segments: Electricity $ 11,029 $ 9,025 $ 696 $ 1,308 Gas 30,287 29,181 (791 ) 1,897 Water 14,678 13,761 (302 ) 1,219 Corporate unallocated 2,642 2,245 241 156 Total $ 58,636 $ 54,212 $ (156 ) $ 4,580 The following table summarizes the activity within the restructuring related balance sheet accounts for the 2018 and 2016 Projects during the nine months ended September 30, 2018 : Accrued Employee Severance Asset Impairments & Net Loss on Sale or Disposal Other Accrued Costs Total (in thousands) Beginning balance, January 1, 2018 $ 37,654 $ — $ 2,471 $ 40,125 Costs charged to expense 79,011 568 3,329 82,908 Cash (payments) receipts (23,302 ) 332 (4,478 ) (27,448 ) Net assets disposed and impaired — (900 ) — (900 ) Effect of change in exchange rates (3,996 ) — (2 ) (3,998 ) Ending balance, September 30, 2018 $ 89,367 $ — $ 1,320 $ 90,687 Asset impairments are determined at the asset group level. Revenues and net operating income from the activities we have exited or will exit under the restructuring projects are not material to our operating segments or consolidated results. Other restructuring costs include expenses for employee relocation, professional fees associated with employee severance, and costs to exit the facilities once the operations in those facilities have ceased. Costs associated with restructuring activities are generally presented in the Consolidated Statements of Operations as restructuring, except for certain costs associated with inventory write-downs, which are classified within cost of revenues, and accelerated depreciation expense, which is recognized according to the use of the asset. The current portion of restructuring liabilities were $42.2 million and $32.5 million as of September 30, 2018 and December 31, 2017 . The current portion of restructuring liabilities are classified within other current liabilities on the Consolidated Balance Sheets. The long-term portion of restructuring liabilities balances were $48.5 million and $7.6 million as of September 30, 2018 and December 31, 2017

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2018
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders' Equity Preferred Stock We have authorized the issuance of 10 million shares of preferred stock with no par value. In the event of a liquidation, dissolution, or winding up of the affairs of the corporation, whether voluntary or involuntary, the holders of any outstanding preferred stock will be entitled to be paid a preferential amount per share to be determined by the Board of Directors prior to any payment to holders of common stock. There was no preferred stock issued or outstanding at September 30, 2018 and December 31, 2017 . Other Comprehensive Income (Loss) The before-tax amount, income tax (provision) benefit, and net-of-tax amount related to each component of OCI were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Before-tax amount Foreign currency translation adjustment $ (576 ) $ 14,169 $ (18,554 ) $ 49,755 Foreign currency translation adjustment reclassified into net income — 1,089 — 1,089 Net unrealized gain (loss) on derivative instruments designated as cash flow hedges 712 57 5,216 (480 ) Net hedging (gain) loss reclassified into net income 175 148 (2,198 ) 785 Net defined benefit plan loss reclassified to net income 399 447 1,228 1,271 Total other comprehensive income (loss), before tax 710 15,910 (14,308 ) 52,420 Tax (provision) benefit Foreign currency translation adjustment (102 ) (328 ) 16 (451 ) Net unrealized gain (loss) on derivative instruments designated as cash flow hedges (20 ) (22 ) (446 ) 185 Net hedging (gain) loss reclassified into net income 41 (57 ) (9 ) (303 ) Net defined benefit plan loss reclassified to net income (7 ) (37 ) (21 ) (267 ) Total other comprehensive income (loss) tax benefit (88 ) (444 ) (460 ) (836 ) Net-of-tax amount Foreign currency translation adjustment (678 ) 13,841 (18,538 ) 49,304 Foreign currency translation adjustment reclassified into net income — 1,089 — 1,089 Net unrealized gain (loss) on derivative instruments designated as cash flow hedges 692 35 4,770 (295 ) Net hedging (gain) loss reclassified into net income 216 91 (2,207 ) 482 Net defined benefit plan loss reclassified to net income 392 410 1,207 1,004 Total other comprehensive income (loss), net of tax $ 622 $ 15,466 $ (14,768 ) $ 51,584 The changes in the components of AOCI, net of tax, were as follows: Foreign Currency Translation Adjustments Net Unrealized Gain (Loss) on Derivative Instruments Net Unrealized Gain (Loss) on Nonderivative Instruments Pension Benefit Obligation Adjustments Accumulated Other Comprehensive Income (Loss) (in thousands) Balances at January 1, 2017 $ (182,986 ) $ 43 $ (14,380 ) $ (32,004 ) $ (229,327 ) OCI before reclassifications 49,304 (295 ) — — 49,009 Amounts reclassified from AOCI 1,089 482 — 1,004 2,575 Total other comprehensive income (loss) 50,393 187 — 1,004 51,584 Balances at September 30, 2017 $ (132,593 ) $ 230 $ (14,380 ) $ (31,000 ) $ (177,743 ) Balances at January 1, 2018 $ (128,648 ) $ 966 $ (14,380 ) $ (28,416 ) $ (170,478 ) OCI before reclassifications (18,538 ) 4,770 — — (13,768 ) Amounts reclassified from AOCI — (2,207 ) — 1,207 (1,000 ) Total other comprehensive income (loss) (18,538 ) 2,563 — 1,207 (14,768 ) Balances at September 30, 2018 $ (147,186 ) $ 3,529 $ (14,380 ) $ (27,209 ) $ (185,246 )

Fair Values of Financial Instru

Fair Values of Financial Instruments	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Values of Financial Instruments	Fair Values of Financial Instruments The following table presents the fair values of our financial instruments: September 30, 2018 December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value (in thousands) Assets Cash and cash equivalents $ 109,044 $ 109,044 $ 176,274 $ 176,274 Restricted cash 2,106 2,106 311,061 311,061 Foreign exchange forwards 69 69 41 41 Interest rate swaps 3,784 3,784 2,370 2,370 Interest rate caps 1,335 1,335 489 489 Cross currency swaps 2,449 2,449 — — Liabilities Credit facility USD denominated term loan $ 641,875 $ 649,686 $ 194,063 $ 192,295 Multicurrency revolving line of credit 10,000 10,137 125,414 124,100 Senior notes 400,000 383,000 300,000 301,125 Foreign exchange forwards 240 240 289 289 The following methods and assumptions were used in estimating fair values: Cash, cash equivalents, and restricted cash: Due to the liquid nature of these instruments, the carrying amount approximates fair value (Level 1). Derivatives: See Note 7 for a description of our methods and assumptions in determining the fair value of our derivatives, which were determined using Level 2 inputs. Credit facility - term loan and multicurrency revolving line of credit: The term loan and revolver are not traded publicly. The fair values, which are determined based upon a hypothetical market participant, are calculated using a discounted cash flow model with Level 2 inputs, including estimates of incremental borrowing rates for debt with similar terms, maturities, and credit profiles. Senior Notes: The Notes are not registered securities nor listed on any securities exchange, but may be actively traded by qualified institutional buyers. The fair value is estimated using Level 1 inputs, as it is based on quoted prices for these instruments in active markets. The fair values at September 30, 2018 and December 31, 2017

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Segment Information	Segment Information We operate under the Itron brand worldwide and manage and report under four operating segments: Electricity, Gas, Water, and Networks. Our Water operating segment includes our global water, and heat and allocation solutions. Networks became a new operating segment with the acquisition of SSNI. This structure allows each operating segment to develop its own go-to-market strategy, prioritize its marketing and research and development requirements, and focus on its strategic investments. Our sales and marketing function is managed under each operating segment. Our research and development, service delivery, and manufacturing operations are managed on a worldwide basis to promote a global perspective in our operations and processes and yet still maintain alignment with the operating segments. We have three GAAP measures of segment performance: revenue, gross profit (margin), and operating income (margin). Intersegment revenues are minimal. Certain operating expenses are allocated to our Electricity, Gas, and Water operating segments based upon internally established allocation methodologies. We will not allocate operating expenses to our Networks operating segment until it is fully integrated and managed centrally. Corporate operating expenses, interest income, interest expense, other income (expense), and income tax provision are not allocated to the operating segments, nor are included in the measure of operating segment profit or loss. In addition, we allocate only certain production assets and intangible assets to our operating segments. We do not manage the performance of the operating segments on a balance sheet basis. Segment Products Electricity Standard electricity (electromechanical and electronic) meters; smart network and data platform solutions that include one or several of the following: smart electricity meters; smart electricity communication modules; prepayment systems, including smart key, keypad, and smart card communication technologies; smart systems including handheld, mobile, and fixed network collection technologies; smart network technologies; meter data management software; knowledge application solutions; installation; implementation; and professional services including consulting and analysis. Gas Standard gas meters; smart network and data platform solutions that include one or several of the following: smart gas meters; smart gas communication modules; prepayment systems, including smart key, keypad, and smart card communication technologies; smart systems, including handheld, mobile, and fixed network collection technologies; smart network technologies; meter data management software; knowledge application solutions installation; implementation; and professional services including consulting and analysis. Water Standard water and heat meters; smart network and data platform solutions that include one or several of the following: smart water meters and communication modules; smart heat meters; smart systems including handheld, mobile, and fixed network collection technologies; meter data management software; knowledge application solutions; installation; implementation; and professional services including consulting and analysis. Networks Smart network and data platform solutions for electricity, gas, water and smart cities including advanced metering, distribution automation, demand-side management, and street lights. Solutions include one or several of the following: communications modules, access points, relays and bridges; network operating software, grid management, security and grid analytics managed services and SaaS; installation; implementation; and professional services including consulting and analysis. Revenues, gross profit, and operating income associated with our operating segments were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Product revenues Electricity $ 198,026 $ 199,784 $ 624,139 $ 620,958 Gas 148,660 124,556 408,300 372,555 Water 106,653 109,644 350,814 327,549 Networks 72,377 — 195,487 — Total Company $ 525,716 $ 433,984 $ 1,578,740 $ 1,321,062 Service revenues Electricity $ 38,816 $ 40,358 $ 115,686 $ 108,267 Gas 8,087 7,224 23,218 22,136 Water 5,931 5,181 17,601 15,956 Networks 17,412 — 53,828 — Total Company $ 70,246 $ 52,763 $ 210,333 $ 146,359 Total revenues Electricity $ 236,842 $ 240,142 $ 739,825 $ 729,225 Gas 156,747 131,780 431,518 394,691 Water 112,584 114,825 368,415 343,505 Networks 89,789 — 249,315 — Total Company $ 595,962 $ 486,747 $ 1,789,073 $ 1,467,421 Gross profit Electricity $ 74,549 $ 76,492 $ 221,511 $ 222,387 Gas 55,812 46,529 139,826 147,880 Water 35,139 42,734 110,779 131,402 Networks 31,597 — 81,413 — Total Company $ 197,097 $ 165,755 $ 553,529 $ 501,669 Operating income (loss) Electricity $ 25,853 $ 17,317 $ 52,082 $ 52,240 Gas 31,279 20,469 18,176 59,177 Water 6,859 15,032 3,973 40,702 Networks (15,624 ) — (119,353 ) — Corporate unallocated (6,691 ) (14,592 ) (33,087 ) (45,438 ) Total Company 41,676 38,226 (78,209 ) 106,681 Total other income (expense) (16,174 ) (4,732 ) (45,193 ) (16,559 ) Income (loss) before income taxes $ 25,502 $ 33,494 $ (123,402 ) $ 90,122 For all periods presented, no customer represents more than 10% of total company revenues. We currently buy a majority of our integrated circuit board assemblies from three suppliers. Management believes that other suppliers could provide similar products, but a change in suppliers, disputes with our suppliers, or unexpected constraints on the suppliers' production capacity could adversely affect operating results. Revenues by region were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) United States and Canada $ 376,676 $ 259,796 $ 1,080,709 $ 824,630 Europe, Middle East, and Africa 177,356 171,924 564,178 493,505 Other (1) 41,930 55,027 144,186 149,286 Total revenues $ 595,962 $ 486,747 $ 1,789,073 $ 1,467,421 (1) The Other region includes our operations in Latin America and Asia Pacific. Depreciation and amortization expense associated with our operating segments was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Electricity $ 6,008 $ 6,687 $ 18,952 $ 17,772 Gas 4,363 5,084 12,819 13,831 Water 3,824 3,860 11,941 11,706 Networks 15,214 — 45,449 — Corporate unallocated 1,040 901 3,267 2,691 Total Company $ 30,449 $ 16,532 $ 92,428 $ 46,000 Subsequent Event

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2018
Revenues [Abstract]
Revenue Recognition	Revenues A summary of significant net changes in the contract assets and the contract liabilities balances during the period is as follows: 2018 Contract liabilities, less contract assets (in thousands) Beginning balance, January 1 $ 59,808 Changes due to business combination 36,936 Revenues recognized from beginning contract liability (31,688 ) Increases due to amounts collected or due 200,428 Revenues recognized from current period increases (142,439 ) Other (847 ) Ending balance, September 30 $ 122,198 On January 1, 2018, total contract assets were $11.3 million and total contract liabilities were $71.1 million . On September 30, 2018, total contract assets were $15.7 million and total contract liabilities were $137.9 million . The contract assets primarily relate to contracts that include a retention clause and allocations related to contracts with multiple performance obligations. The contract liabilities primarily relate to deferred revenue, such as extended warranty and maintenance cost. During the three months ended September 30, 2018 , revenue recognized of $1.6 million was related to amounts that was included as a contract liability at January 1, 2018. Transaction price allocated to the remaining performance obligations Total transaction price allocated to remaining performance obligations represent committed but undelivered products and services for contracts and purchase orders at period end. Twelve-month remaining performance obligations represent the portion of total transaction price allocated to remaining performance obligations that we estimate will be recognized as revenue over the next 12 months. Total transaction price allocated to remaining performance obligations is not a complete measure of our future revenues as we also receive orders where the customer may have legal termination rights but are not likely to terminate. Total transaction price allocated to remaining performance obligations related to contracts is approximately $1.1 billion for the next twelve months and approximately $706 million for periods longer than 12 months. The total remaining performance obligations is comprised of product and service components. The service component relates primarily to maintenance agreements for which customers pay a full year's maintenance in advance, and service revenues are generally recognized over the service period. Total transaction price allocated to remaining performance obligations also includes our extended warranty contracts, for which revenue is recognized over the warranty period, and hardware, which is recognized as units are delivered. The estimate of when remaining performance obligations will be recognized requires significant judgment. Cost to obtain a contract and cost to fulfill a contract with a customer Cost to obtain a contract and costs to fulfill a contract were capitalized and amortized using a systematic rational approached to align with the transfer of control of underlying contracts with customers. While amounts were capitalized, amounts are not material for disclosure. Disaggregation of revenue Refer to Note 15 and the Consolidated Statement of Operations for disclosure regarding the disaggregation of revenue into categories which depict how revenue and cash flows are affected by economic factors. Specifically, our operating segments and geographical regions as disclosed, and categories for products, which include hardware and software and services as presented. Impacts on financial statements Under the modified retrospective transition method, we are required to provide additional disclosures during 2018 of the amount by which each financial statement line item is affected in the current reporting period, as compared with the guidance that was in effect before the change, and an explanation of the reasons for significant changes, if any. The effects of ASC 606 and Subtopic ASC 340-40 on our Consolidated Balance Sheet as of September 30, 2018 were total deferred revenue would have been higher by approximately $23 million , of which, approximately $11 million would have been classified as short term. The difference in deferred revenue reflects the timing of revenue recognition related to certain of our customer contracts. The net impact of all adjustments would have resulted in an increase to our accumulated deficit of approximately $18 million . The difference in accumulated deficit reflects the cumulative effect of adoption and the net effect thereof on the Consolidated Statement of Operations for the three and nine months ended September 30, 2018 . The impact of the adoption was not material to the other line items. The effect of ASC 606 and Subtopic ASC 340-40 was not material to the Consolidated Statements of Operations for the three and nine months ended September 30, 2018

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Business Combinations	Business Combinations Silver Spring Networks, Inc. On January 5, 2018, we completed the acquisition of SSNI by purchasing 100% of SSNI's outstanding stock. The acquisition was financed through incremental borrowings and cash on hand. Refer to Note 6 for further discussion of our debt. SSNI provided smart network and data platform solutions for electricity, gas, water and smart cities including advanced metering, distribution automation, demand-side management, and street lights. Solutions include one or several of the following: communications modules, access points, relays and bridges; network operating software, grid management, security and grid analytics managed services and SaaS; installation; implementation; and professional services including consulting and analysis. Itron is managing the SSNI business as our Networks operating segment. The purchase price of SSNI was $809.2 million , which is net of $97.8 million of acquired cash and cash equivalents. Of the total consideration $802.5 million was paid in cash. The remaining $6.7 million relates to the fair value of pre-acquisition service for replacement awards of unvested SSNI options and restricted stock unit awards with an Itron equivalent award. We made a preliminary allocation of the purchase price to the assets acquired and liabilities assumed based on estimated fair value assessments during the first quarter. We are continuing to collect information to determine the fair values of certain intangible assets, working capital, and deferred income taxes, all of which could affect goodwill. The fair values of these assets and liabilities are provisional until we are able to complete our assessment. The following reflects our preliminary allocation of purchase price as of January 5, 2018: Fair Value Weighted Average Useful Life (in thousands) (in years) Current Assets $ 86,444 Property, plant, and equipment 27,670 Other long-term assets (1) (290 ) Identifiable intangible assets Core-developed technology 81,900 5 Customer contract and relationships 134,000 10 Trademark and trade names 10,800 3 Total identified intangible assets subject to amortization 226,700 8 In-process research and development (IPR&D) 14,400 Total identified intangible assets 241,100 Goodwill 570,790 Current liabilities (90,034 ) Customer contract and relationships (23,900 ) 5 Long-term liabilities (2,565 ) Total net assets acquired $ 809,215 (1) Reflects adjustments to deferred tax assets and liabilities, net as a result of the acquisition, and is classified as part of our overall consolidated deferred tax asset. This unfavorable deferred tax asset more than offsets the fair value of other noncurrent assets acquired. The fair values for the identified trademarks and core-developed technology intangible assets were estimated using the relief from royalty method, which values the assets by estimating the savings achieved by ownership of trademark or technology when compared with the cost of licensing it from an independent owner. The fair value of customer contracts and relationship were estimated using the income approach. Under the income approach, the fair value reflects the present value of the projected cash flows that are expected to be generated. The fair value of IPR&D was valued utilizing the replacement cost method, which measures the value of an asset based on the cost to replace the existing asset. IPR&D will be amortized using the straight-line method after the technology is fully developed and is considered a product offering of SSNI. Incremental costs to be incurred for these projects will be recognized as research and development expense as incurred within the Consolidated Statements of Operations. Core-developed technology represents the fair values of SSNI products that have reached technological feasibility and were part of SSNI's product offerings at the date of the acquisition. Customer contracts and relationships represent the fair value of the relationships developed with its customers, including the backlog. The core-developed technology, trademarks, and customer contracts and relationships intangible assets valued using the income approach will be amortized using the estimated discounted cash flows assumed in the valuation models. Goodwill of $570.8 million arising from the acquisition consists largely of the synergies expected from combining the operations of Itron and SSNI, as well as certain intangible assets that do not qualify for separate recognition. All of the goodwill balance was assigned to the Networks reporting unit and operating segment. We will not be able to deduct any of the goodwill balance for income tax purposes. As a part of the business combination, we have incurred $15.6 million of acquisition related expenses for the nine months ended September 30, 2018 , which includes such activities as success fees, certain consulting and advisory costs, and incremental legal and accounting costs. In addition, for the three and nine months ended September 30, 2018 , we recognized $ 9.4 million and $68.3 million respectively, of integration costs, which are expenses related to integrating SSNI into Itron, and includes expenses such as accounting and process integration and the related consulting fees, severance, site closure costs, system integration, and travel associated with knowledge transfers as we consolidate redundant positions. All acquisition and integration related expenses are included within general and administrative expenses in the Consolidated Statement of Operations. The following table presents the revenues and net loss from SSNI operations that are included in our Consolidated Statements of Operations: Three Months Ended September 30, 2018 January 5, 2018 - September 30, 2018 (in thousands) Revenues $ 89,789 $ 249,315 Net loss (10,738 ) (54,411 ) The following supplemental pro forma results are based on the individual historical results of Itron and SSNI, with adjustments to give effect to the combined operations as if the acquisition had been consummated on January 1, 2017. Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 ( in thousands) Revenues $ 595,962 $ 534,315 $ 1,789,073 $ 1,826,824 Net income (loss) 19,882 5,462 (108,427 ) (1,532 ) The significant nonrecurring adjustments reflected in the proforma schedule above are considered material and include the following: • Elimination of transaction costs incurred by SSNI and Itron prior to the acquisition completion • Reclassification of certain expenses incurred after the acquisition to the appropriate periods assuming the acquisition closed on January 1, 2017 The supplemental pro forma results are intended for information purposes only and do not purport to represent what the combined companies' results of operations would actually have been had the transaction in fact occurred at an earlier date or project the results for any future date or period.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Restricted Cash and Cash Equivalents	Restricted Cash and Cash Equivalents Cash and cash equivalents that are contractually restricted from operating use are classified as restricted cash and cash equivalents. The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Consolidated Statements of Cash Flows: September 30, 2018 December 31, 2017 September 30, 2017 (in thousands) Cash and cash equivalents $ 109,044 $ 176,274 $ 137,584 Current restricted cash included in other current assets 51 51 — Long-term restricted cash 2,055 311,010 — Total cash, cash equivalents, and restricted cash $ 111,150 $ 487,335 $ 137,584
Revenue Recognition	Revenue Recognition The majority of our revenues consist primarily of hardware sales, but may also include the license of software, software implementation services, cloud services and software as a service ("SaaS"), project management services, installation services, consulting services, post-sale maintenance support, and extended or noncustomary warranties. We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance, and collectability of consideration is probable. In determining whether the definition of a contract has been met, we will consider whether the arrangement creates enforceable rights and obligations, which involves evaluation of agreement terms that would allow for the customer to terminate the agreement. If the customer is able to terminate the agreement without providing further consideration to us, the agreement would not be considered to meet the definition of a contract. Many of our revenue arrangements involve multiple performance obligations consisting of hardware, meter reading system software, installation, and/or project management services. Separate contracts entered into with the same customer (or related parties of the customer) at or near the same time are accounted for as a single contract where one or more of the following criteria are met: • The contracts are negotiated as a package with a single commercial objective; • The amount of consideration to be paid in one contract depends on the price or performance of the other contract; or • The goods or services promised in the contracts (or some goods or services promised in each of the contracts) are a single performance obligation. Once the contract has been defined, we evaluate whether the promises in the contract should be accounted for as more than one performance obligation. This evaluation requires significant judgment, and the decision to separate the combined or single contract into multiple performance obligations could change the amount of revenue and profit recognized in a given period. For some of our contracts, the customer contracts with us to provide a significant service of integrating, customizing or modifying goods or services in the contract in which case the goods or services would be combined into a single performance obligation. It is common that we may promise to provide multiple distinct goods or services within a contract in which case we separate the contract into more than one performance obligation. If a contract is separated into more than one performance obligation, we allocate the total transaction price to each performance obligation in an amount based on the estimated relative standalone selling prices of the promised goods or services underlying each performance obligation. If applicable, for goods or services where we have observable standalone sales, the observable standalone sales are used to determine the standalone selling price. For the majority of our goods and services, we do not have observable standalone sales. As a result, we estimate the standalone selling price using either the adjusted market assessment approach or the expected cost plus a margin approach. Approaches used to estimate the standalone selling price for a given good or service will maximize the use of observable inputs and considers several factors, including our pricing practices, costs to provide a good or service, the type of good or service, and availability of other transactional data, among others. We determine the estimated standalone selling prices of goods or services used in our allocation of arrangement consideration on an annual basis or more frequently if there is a significant change in our business or if we experience significant variances in our transaction prices. Many of our contracts with customers include variable consideration, which can include liquidated damage provisions, rebates and volume and early payment discounts. Some of our contracts with customers contain clauses for liquidated damages related to the timing of delivery or milestone accomplishments, which could become material in an event of failure to meet the contractual deadlines. At the inception of the arrangement and on an ongoing basis, we evaluate the probability and magnitude of having to pay liquidated damages. We estimate variable consideration using the expected value method, taking into consideration contract terms, historical customer behavior and historical sales. In the case of liquidated damages, we also take into consideration progress towards meeting contractual milestones, including whether milestones have not been achieved, specified rates, if applicable, stated in the contract, and history of paying liquidated damages to the customer or similar customers. Variable consideration is included in the transaction price if, in our judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur. In the normal course of business, we do not accept product returns unless the item is defective as manufactured. We establish provisions for estimated returns and warranties. In addition, we do not typically provide customers with the right to a refund. Hardware revenues are recognized at a point in time. Transfer of control is typically at the time of shipment, receipt by the customer, or, if applicable, upon receipt of customer acceptance provisions. We will recognize revenue prior to receipt of customer acceptance for hardware in cases where the customer acceptance provision is determined to be a formality. Transfer of control would not occur until receipt of customer acceptance in hardware arrangements where such provisions are subjective or where we do not have history of meeting the acceptance criteria. Perpetual software licenses are considered to be a right to use intellectual property and are recognized at a point in time. Transfer of control is considered to be at the point at which it is available to the customer to download and use or upon receipt of customer acceptance. In certain contracts, software licenses may be sold with professional services that include implementation services that include a significant service of integrating, customizing or modifying the software. In these instances, the software license is combined into single performance obligation with the implementation services and recognized over time as the implementation services are performed. Hardware and software licenses (when not combined with professional services) are typically billed when shipped and revenue recognized at a point-in-time. As a result, the timing of revenue recognition and invoicing does not have a significant impact on contract assets and liabilities. Professional services, which include implementation, project management, installation, and consulting services are recognized over time. We measure progress towards satisfying these performance obligations using input methods, most commonly based on the costs incurred in relation to the total expected costs to provide the service. We expect this method to best depict our performance in transferring control of services promised to the customer or represents a reasonable proxy for measuring progress. The estimate of expected costs to provide services requires judgment. Cost estimates take into consideration past history and the specific scope requested by the customer and are updated quarterly. We may also offer professional services on a stand-ready basis over a specified period of time, in which case revenue would be recognized ratably over the term. Invoicing of these services is commensurate with performance and occurs on a monthly basis. As such, these services do not have a significant impact on contract assets and contract liabilities. Cloud services and SaaS arrangements where customers have access to certain of our software within a cloud-based IT environment that we manage, host and support are offered to customers on a subscription basis. Revenue for the cloud services and SaaS offerings are generally recognized over time, ratably over the contact term commencing with the date the services are made available to the customer. Services, including professional services, cloud services and SaaS arrangements, are commonly billed on a monthly basis in arrears and typically result in an unbilled receivable, which is not considered a contract asset as our right to consideration is unconditional. Certain of our revenue arrangements include an extended or noncustomary warranty provisions that covers all or a portion of a customer's replacement or repair costs beyond the standard or customary warranty period. Whether or not the extended warranty is separately priced in the arrangement, such warranties are considered to be a separate good or service, and a portion of the transaction price is allocated to this extended warranty performance obligation. This revenue is recognized, ratably over the extended warranty coverage period. Hardware and software post-sale maintenance support fees are recognized over time, ratably over the life of the related service contract. Shipping and handling costs and incidental expenses billed to customers are recognized as revenue, with the associated cost charged to cost of revenues. We recognize sales, use, and value added taxes billed to our customers on a net basis. Support fees are typically billed on an annual basis, resulting in a contract liability. Payment terms with customers can vary by customer; however, amounts billed are typically payable within 30 to 90 days, depending on the destination country. We do not make a practice of offering financing as part of our contracts with customers. We incur certain incremental costs to obtain contracts with customers, primarily in the form of sales commissions. Where the amortization period is one year or less, we have elected to apply the practical expedient and recognize the related commissions
New Accounting Pronouncements	New Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-02, Leases (Topic 842) (ASU 2016-02) , which requires substantially all leases be recognized by lessees on their balance sheet as a right-of-use asset and corresponding lease liability, including leases currently accounted for as operating leases. The new standard also will result in enhanced quantitative and qualitative disclosures, including significant judgments made by management, to provide greater insight into the extent of revenue and expense recognized and expected to be recognized from existing leases. The standard requires modified retrospective adoption and will be effective for annual reporting periods beginning after December 15, 2018, with early adoption permitted. In July 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases (ASU 2018-10), to clarify, improve, and correct various aspects of ASU 2016-02, and also issued ASU 2018-11, Targeted Improvements to Topic 842, Leases (ASU 2018-11), to simplify transition requirements and, for lessors, provide a practical expedient for the separation of nonlease components from lease components. The effective date and transition requirements in ASU 2018-10 and ASU 2018-11 are the same as the effective date and transition requirements of ASU 2016-02. We currently believe the most significant impact relates to our real estate leases and the increased financial statement disclosures, but are continuing to evaluate the effect that the updated standard will have on our consolidated results of operations, financial position, cash flows, and related financial statement disclosures. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326) (ASU 2016-13), which replaces the incurred loss impairment methodology in current GAAP with a methodology based on expected credit losses. This estimate of expected credit losses uses a broader range of reasonable and supportable information. This change will result in earlier recognition of credit losses. ASU 2016-13 is effective for annual reporting periods, and interim periods within those years, beginning after December 15, 2019. We are currently evaluating the impact of this standard on our consolidated financial statements, including accounting policies, processes, and systems. In October 2016, the FASB issued ASU 2016-16, Income Taxes: Intra-Entity Transfers of Assets Other Than Inventory (Topic 740) (ASU 2016-16), which removes the prohibition in ASC 740 against the immediate recognition of the current and deferred income tax effects of intra-entity transfers of assets other than inventory. Under ASU 2016-16, the selling entity is required to recognize a current tax expense or benefit upon transfer of the asset. Similarly, the purchasing entity is required to recognize a deferred tax asset or deferred tax liability, as well as the related deferred tax benefit or expense, upon receipt of the asset. The resulting deferred tax asset or deferred tax liability is measured by computing the difference between the tax basis of the asset in the buyer's jurisdiction and its financial reporting carrying value in the consolidated financial statements and multiplying such difference by the enacted tax rate in the buyer's jurisdiction. ASU 2016-16 is effective for fiscal years beginning after December 15, 2017 with early adoption permitted. We adopted this standard effective January 1, 2018 using the modified retrospective transition method, recognizing a $0.9 million one-time decrease to accumulated deficit. In March 2017, the FASB issued ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (ASU 2017-07), which provides additional guidance on the presentation of net benefit costs in the income statement. ASU 2017-07 requires an employer disaggregate the service cost component from the other components of net benefit cost and to disclose other components outside of a subtotal of income from operations. It also allows only the service cost component of net benefit costs to be eligible for capitalization. ASU 2017-07 is effective for fiscal years beginning after December 15, 2017 with early adoption permitted. We adopted this standard on January 1, 2018 retrospectively for the presentation of the service cost component of net periodic pension cost in the statement of operations, and prospectively for the capitalization of the service cost component of net periodic pension cost. For applying the retrospective presentation requirements, we elected to utilize amounts previously disclosed in our defined benefit pension plan footnote for the prior comparative periods as the estimation basis for applying the retrospective presentation. This resulted in a reclassification of an immaterial amount of net periodic pension benefit costs from operating income to other income (expense) in all periods presented on the Consolidated Statements of Operations. In August 2017, the FASB issued ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities (ASU 2017-12), which amends and simplifies existing guidance in order to allow companies to more accurately present the economic effects of risk management activities in the financial statements. This update expands and refines hedge accounting for both nonfinancial and financial risk components and aligns the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. Additionally, the amendments in ASU 2017-12 provide new guidance about income statement classification and eliminates the requirement to separately measure and report hedge ineffectiveness. ASU 2017-12 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. We adopted this standard on April 1, 2018 and it did not materially impact our consolidated results of operations, financial position, cash flows, or related financial statement disclosures. In August 2018, the FASB issued ASU 2018-13, Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement (ASU 2018-13) which amends the disclosure requirements under ASC 820, Fair Value Measurements . ASU 2018-13 is effective for us beginning with our interim financial reports for the first quarter of 2020. In August 2018, the FASB issued ASU 2018-14, Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans (ASU 2018-14) which amends the disclosure requirements under ASC 715-20, Compensation—Retirement Benefits—Defined Benefit Plans

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Restricted Cash and Cash Equivalents	The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Consolidated Statements of Cash Flows: September 30, 2018 December 31, 2017 September 30, 2017 (in thousands) Cash and cash equivalents $ 109,044 $ 176,274 $ 137,584 Current restricted cash included in other current assets 51 51 — Long-term restricted cash 2,055 311,010 — Total cash, cash equivalents, and restricted cash $ 111,150 $ 487,335 $ 137,584
Schedule of Cash and Cash Equivalents	The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Consolidated Statements of Cash Flows: September 30, 2018 December 31, 2017 September 30, 2017 (in thousands) Cash and cash equivalents $ 109,044 $ 176,274 $ 137,584 Current restricted cash included in other current assets 51 51 — Long-term restricted cash 2,055 311,010 — Total cash, cash equivalents, and restricted cash $ 111,150 $ 487,335 $ 137,584

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings (loss) per share (EPS): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands, except per share data) Net income (loss) available to common shareholders $ 19,882 $ 25,576 $ (123,127 ) $ 55,518 Weighted average common shares outstanding - Basic 39,340 38,713 39,177 38,624 Dilutive effect of stock-based awards 569 754 — 715 Weighted average common shares outstanding - Diluted 39,909 39,467 39,177 39,339 Earnings (loss) per common share - Basic $ 0.51 $ 0.66 $ (3.14 ) $ 1.44 Earnings (loss) per common share - Diluted $ 0.50 $ 0.65 $ (3.14 ) $ 1.41

Certain Balance Sheet Compone_2

Certain Balance Sheet Components (Tables)	9 Months Ended
	Sep. 30, 2018
Balance Sheet Related Disclosures [Abstract]
Accounts Receivable, Net	Accounts receivable, net September 30, 2018 December 31, 2017 (in thousands) Trade receivables (net of allowance of $3,822 and $3,957) $ 422,567 $ 369,047 Unbilled receivables 27,025 28,982 Total accounts receivable, net $ 449,592 $ 398,029
Allowance for Credit Losses on Financing Receivables	Allowance for doubtful accounts activity Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Beginning balance $ 4,552 $ 3,502 $ 3,957 $ 3,320 Provision (recovery) for doubtful accounts, net (105 ) 769 1,149 1,513 Accounts written-off (624 ) (310 ) (1,129 ) (1,115 ) Effect of change in exchange rates (1 ) 30 (155 ) 273 Ending balance $ 3,822 $ 3,991 $ 3,822 $ 3,991
Inventories	Inventories September 30, 2018 December 31, 2017 (in thousands) Materials $ 128,744 $ 126,656 Work in process 8,595 9,863 Finished goods 70,699 57,316 Total inventories $ 208,038 $ 193,835
Property, Plant, and Equipment, Net	Property, plant, and equipment, net September 30, 2018 December 31, 2017 (in thousands) Machinery and equipment $ 318,218 $ 310,753 Computers and software 112,681 104,384 Buildings, furniture, and improvements 149,934 135,566 Land 15,463 18,433 Construction in progress, including purchased equipment 41,423 39,946 Total cost 637,719 609,082 Accumulated depreciation (416,924 ) (408,314 ) Property, plant, and equipment, net $ 220,795 $ 200,768
Depreciation Expense	Depreciation expense Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Depreciation expense $ 12,489 $ 10,907 $ 38,729 $ 30,856

Intangible Assets and Liabili_2

Intangible Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2018
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Schedule of Intangible Assets by Major Class	The gross carrying amount and accumulated amortization (accretion) of our intangible assets and liabilities, other than goodwill, were as follows: September 30, 2018 December 31, 2017 Gross Accumulated (Amortization) Accretion Net Gross Accumulated Net (in thousands) Intangible Assets Core-developed technology $ 515,949 $ (427,069 ) $ 88,880 $ 429,548 $ (399,969 ) $ 29,579 Customer contracts and relationships 385,148 (210,735 ) 174,413 258,586 (197,582 ) 61,004 Trademarks and trade names 79,739 (69,376 ) 10,363 70,056 (66,004 ) 4,052 Other 12,602 (11,166 ) 1,436 11,661 (11,068 ) 593 Total intangible assets subject to amortization $ 993,438 $ (718,346 ) $ 275,092 $ 769,851 $ (674,623 ) $ 95,228 In-process research and development 3,100 — 3,100 — — — Total intangible assets $ 996,538 $ (718,346 ) $ 278,192 $ 769,851 $ (674,623 ) $ 95,228 Intangible Liabilities Customer contracts and relationships $ (23,900 ) $ 3,913 $ (19,987 ) $ — $ — $ —
Summary of Intangible Asset Account Activity	A summary of intangible assets and liabilities activity is as follows: Nine Months Ended September 30, 2018 2017 (in thousands) Beginning balance, intangible assets, gross $ 769,851 $ 669,896 Intangible assets acquired 242,039 36,500 Effect of change in exchange rates (15,352 ) 57,640 Ending balance, intangible assets, gross $ 996,538 $ 764,036 Beginning balance, intangible liabilities, gross $ — $ — Intangible liabilities acquired (23,900 ) — Effect of change in exchange rates — — Ending balance, intangible liabilities, gross $ (23,900 ) $ —
Schedule of Intangible Assets, Future Amortization Expense	Estimated future annual amortization (accretion) is as follows: Year Ending December 31, Amortization Accretion Estimated Annual Amortization, net (in thousands) 2018 (amount remaining at September 30, 2018) $ 19,547 $ (1,304 ) $ 18,243 2019 72,681 (8,233 ) 64,448 2020 52,727 (8,028 ) 44,699 2021 37,314 (1,963 ) 35,351 2022 27,160 (459 ) 26,701 Beyond 2022 65,663 — 65,663 Total intangible assets subject to amortization (accretion) $ 275,092 $ (19,987 ) $ 255,105

Goodwill (Tables)

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2018
Goodwill Excluding Non Goodwill Intangibles [Abstract]
Schedule of Goodwill	The following table reflects goodwill allocated to each reporting unit: Electricity Gas Water Networks Total Company (in thousands) Goodwill balance at January 1, 2018 Goodwill before impairment $ 500,625 $ 352,703 $ 378,901 $ — $ 1,232,229 Accumulated impairment losses (386,384 ) — (290,083 ) — (676,467 ) Goodwill, net 114,241 352,703 88,818 — 555,762 Goodwill acquired — — — 570,790 570,790 Effect of change in exchange rates (370 ) (3,259 ) (785 ) (243 ) (4,657 ) Goodwill balance at September 30, 2018 Goodwill before impairment 496,565 349,444 374,569 570,547 1,791,125 Accumulated impairment losses (382,694 ) — (286,536 ) — (669,230 ) Goodwill, net $ 113,871 $ 349,444 $ 88,033 $ 570,547 $ 1,121,895

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Schedule of Debt	The components of our borrowings were as follows: September 30, 2018 December 31, 2017 (in thousands) Credit facility: USD denominated term loan $ 641,875 $ 194,063 Multicurrency revolving line of credit 10,000 125,414 Senior notes 400,000 300,000 Total debt 1,051,875 619,477 Less: current portion of debt 24,375 19,688 Less: unamortized prepaid debt fees - term loan 5,208 629 Less: unamortized prepaid debt fees - senior notes 16,915 5,588 Long-term debt $ 1,005,377 $ 593,572
Schedule of Maturities of Long-term Debt	The amount of required minimum principal payments on our long-term debt in aggregate over the next five years, are as follows: Year Ending December 31, Minimum Payments (in thousands) 2018 (amount remaining at September 30, 2018) $ 4,063 2019 28,438 2020 44,777 2021 60,937 2022 65,000 2023 448,660 Total minimum payments on debt $ 651,875

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The fair values of our derivative instruments were as follows: Fair Value Derivative Assets Balance Sheet Location September 30, 2018 December 31, 2017 Derivatives designated as hedging instruments under Subtopic 815-20 (in thousands) Interest rate swap contract Other current assets $ 2,051 $ 658 Interest rate cap contracts Other current assets 607 17 Cross currency swap contract Other current assets 1,711 — Interest rate swap contract Other long-term assets 1,733 1,712 Interest rate cap contracts Other long-term assets 728 179 Cross currency swap contract Other long-term assets 738 — Derivatives not designated as hedging instruments under Subtopic 815-20 Foreign exchange forward contracts Other current assets 69 41 Interest rate cap contracts Other current assets — 25 Interest rate cap contracts Other long-term assets — 268 Total asset derivatives $ 7,637 $ 2,900 Derivative Liabilities Derivatives not designated as hedging instruments under Subtopic 815-20 Foreign exchange forward contracts Other current liabilities $ 240 $ 289
Accumulated OCI for Derivative and Nonderivative Instruments Designated as Hedging Instruments, Net of Tax	The changes in accumulated other comprehensive income (loss) (AOCI), net of tax, for our derivative and nonderivative hedging instruments, were as follows: 2018 2017 (in thousands) Net unrealized gain (loss) on hedging instruments at January 1, $ (13,414 ) $ (14,337 ) Unrealized gain (loss) on hedging instruments 4,770 (295 ) Realized loss (gain) reclassified into net income (2,207 ) 482 Net unrealized gain (loss) on hedging instruments at September 30, $ (10,851 ) $ (14,150 )
Offsetting Assets	A summary of the effect of netting arrangements on our financial position related to the offsetting of our recognized derivative assets and liabilities under master netting arrangements or similar agreements is as follows: Offsetting of Derivative Assets Gross Amounts of Recognized Assets Presented in the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheets Derivative Financial Instruments Cash Collateral Received Net Amount (in thousands) September 30, 2018 $ 7,637 $ (102 ) $ — $ 7,535 December 31, 2017 $ 2,900 $ (90 ) $ — $ 2,810
Offsetting Liabilities	Offsetting of Derivative Liabilities Gross Amounts of Recognized Liabilities Presented in the Consolidated Balance Sheets Gross Amounts Not Offset in the Consolidated Balance Sheets Derivative Financial Instruments Cash Collateral Pledged Net Amount (in thousands) September 30, 2018 $ 240 $ (102 ) $ — $ 138 December 31, 2017 $ 289 $ (90 ) $ — $ 199
Effect of Cash Flow Derivatives on the Balance Sheet and Income Statement, Before Tax	The before-tax effects of our accounting for derivative instruments designated as hedges on AOCI were as follows: Derivatives in Subtopic 815-20 Cash Flow Hedging Relationships Amount of Gain (Loss) Recognized in OCI on Derivative Gain (Loss) Reclassified from AOCI into Income Location Amount 2018 2017 2018 2017 (in thousands) (in thousands) Three Months Ended September 30, Interest rate swap contract $ 302 $ 81 Interest expense $ 314 $ (92 ) Interest rate cap contracts (220 ) (24 ) Interest expense (149 ) (55 ) Cross currency swap contract 599 — Interest expense 363 — Cross currency swap contract — — Other income/(expense), net (733 ) — Nine Months Ended September 30, Interest rate swap contract $ 2,062 $ (255 ) Interest expense $ 649 $ (637 ) Interest rate cap contracts 149 (225 ) Interest expense (685 ) (148 ) Cross currency swap contract 2,975 — Interest expense 570 — Cross currency swap contract — — Other income/(expense), net 1,635 —
Foreign Exchange Derivatives Not Designated As Hedging Instruments	The effect of our derivative instruments not designated as hedges on the Consolidated Statements of Operations was as follows: Derivatives Not Designated as Hedging Instrument under Subtopic 815-20 Location Gain (Loss) Recognized on Derivatives in Other Income (Expense) 2018 2017 Three Months Ended September 30, (in thousands) Foreign exchange forward contracts Other income (expense), net $ (1,149 ) $ (1,760 ) Interest rate cap contracts Interest expense — (36 ) Nine Months Ended September 30, Foreign exchange forward contracts Other income (expense), net $ 964 $ (5,565 ) Interest rate cap contracts Interest expense 377 (337 )

Defined Benefit Pension Plans (

Defined Benefit Pension Plans (Tables)	9 Months Ended
	Sep. 30, 2018
Defined Benefit Plan [Abstract]
Schedule of Amounts Recognized in the Consolidated Balance Sheets	Amounts recognized on the Consolidated Balance Sheets consist of: September 30, 2018 December 31, 2017 (in thousands) Assets Plan assets in other long-term assets $ 911 $ 991 Liabilities Current portion of pension benefit obligation in wages and benefits payable 3,091 3,260 Long-term portion of pension benefit obligation 96,081 95,717 Pension benefit obligation, net $ 98,261 $ 97,986
Schedule of Net Periodic Pension Benefit Costs	Net periodic pension benefit costs for our plans include the following components: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Service cost $ 1,008 $ 994 $ 3,025 $ 2,846 Interest cost 567 568 1,767 1,628 Expected return on plan assets (160 ) (152 ) (510 ) (445 ) Amortization of actuarial net loss 383 431 1,178 1,225 Amortization of unrecognized prior service costs 16 16 50 46 Net periodic benefit cost $ 1,814 $ 1,857 $ 5,510 $ 5,300

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation Expense and Related Tax Benefit	Total stock-based compensation expense and the related tax benefit were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Stock options $ 911 $ 717 $ 2,694 $ 1,974 Restricted stock units 5,381 4,170 19,803 12,538 Unrestricted stock awards 158 232 572 742 Phantom stock units 762 626 2,039 1,510 Total stock-based compensation $ 7,212 $ 5,745 $ 25,108 $ 16,764 Related tax benefit $ 1,259 $ 1,192 $ 4,387 $ 3,520
Employee Stock Options Activity	A summary of our stock option activity is as follows: Shares Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Life Aggregate Intrinsic Value Weighted Average Grant Date Fair Value (in thousands) (years) (in thousands) Outstanding, January 1, 2017 959 $ 45.64 6.6 $ 19,125 Granted 135 65.94 $ 21.98 Exercised (36 ) 38.68 972 Forfeited (35 ) 47.38 Expired (47 ) 67.43 Outstanding, September 30, 2017 976 $ 47.60 6.5 $ 30,320 Outstanding, January 1, 2018 956 $ 47.10 6.3 $ 21,965 Converted upon acquisition 42 51.86 $ 14.86 Granted 117 68.90 $ 24.55 Exercised (151 ) 38.98 4,509 Forfeited (3 ) 68.43 Expired (66 ) 95.31 Outstanding, September 30, 2018 895 $ 47.92 6.6 $ 15,332 Exercisable September 30, 2018 590 $ 42.53 5.6 $ 12,867 Expected to vest, September 30, 2018 305 $ 58.35 8.5 $ 2,466
Stock Options, Valuation Assumptions	The weighted-average assumptions used to estimate the fair value of stock options granted and the resulting weighted average fair value are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Expected volatility 28.6 % 29.0 % 30.6 % 32.5 % Risk-free interest rate 2.9 % 1.8 % 2.8 % 2.0 % Expected term (years) 6.1 5.5 6.1 5.5
Restricted Stock Units Award Activity	The following table summarizes restricted stock unit activity: Number of Restricted Stock Units Weighted Average Grant Date Fair Value Aggregate Intrinsic Value (in thousands) (in thousands) Outstanding, January 1, 2017 701 Granted 141 $ 65.54 Released (340 ) $ 13,097 Forfeited (23 ) Outstanding, September 30, 2017 479 Outstanding, January 1, 2018 556 $ 47.68 Converted upon acquisition 579 69.40 Granted 262 65.22 Released (494 ) 54.08 $ 26,753 Forfeited (102 ) 68.15 Outstanding, September 30, 2018 801 62.57 Vested but not released, September 30, 2018 9 $ 586 Expected to vest, September 30, 2018 741 $ 47,554
Restricted Stock Units, Valuation Assumptions	The weighted-average assumptions used to estimate the fair value of performance-based restricted stock units granted and the resulting weighted average fair value are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Expected volatility N/A 27.9 % 28.0 % 28.0 % Risk-free interest rate N/A 1.4 % 2.2 % 1.0 % Expected term (years) N/A 2.3 2.1 1.7 Weighted average fair value N/A $ 80.64 $ 78.56 $ 77.75
Schedule of Other Share-based Compensation, Activity	The following table summarizes phantom stock unit activity: Number of Phantom Stock Units Weighted Average Grant Date Fair Value (in thousands) Outstanding, January 1, 2017 62 Granted 32 $ 65.55 Released (20 ) Forfeited (7 ) Outstanding, September 30, 2017 67 Expected to vest, September 30, 2017 67 Outstanding, January 1, 2018 63 $ 51.88 Converted upon acquisition 21 69.40 Granted 37 68.06 Released (34 ) 53.55 Forfeited (3 ) 56.47 Outstanding, September 30, 2018 84 62.53 Expected to vest, September 30, 2018 84

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits Related To Uncertain Tax Positions	The net interest and penalties expense recognized were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Net interest and penalties expense (benefit) $ 414 $ (746 ) $ 1,152 $ (334 ) Accrued interest and penalties recognized were as follows: September 30, 2018 December 31, 2017 (in thousands) Accrued interest $ 3,707 $ 2,706 Accrued penalties 2,396 2,426 Unrecognized tax benefits related to uncertain tax positions and the amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate were as follows: September 30, 2018 December 31, 2017 (in thousands) Unrecognized tax benefits related to uncertain tax positions $ 78,332 $ 56,702 The amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate 76,958 55,312

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Line of Credit Facilities	Our available lines of credit, outstanding standby LOCs, and performance bonds were as follows: September 30, 2018 December 31, 2017 (in thousands) Credit facilities Multicurrency revolving line of credit $ 500,000 $ 500,000 Long-term borrowings (10,000 ) (125,414 ) Standby LOCs issued and outstanding (41,108 ) (31,881 ) Net available for additional borrowings under the multi-currency revolving line of credit $ 448,892 $ 342,705 Net available for additional standby LOCs under sub-facility 258,892 218,119 Unsecured multicurrency revolving lines of credit with various financial institutions Multicurrency revolving lines of credit $ 106,281 $ 110,477 Standby LOCs issued and outstanding (19,577 ) (21,030 ) Short-term borrowings (180 ) (916 ) Net available for additional borrowings and LOCs $ 86,524 $ 88,531 Unsecured surety bonds in force $ 96,157 $ 51,344
Schedule of Warranty Accruals	A summary of the warranty accrual account activity is as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Beginning balance $ 43,719 $ 39,810 $ 34,862 $ 43,302 Assumed liabilities from acquisition — — 5,742 — New product warranties 869 2,708 3,151 6,637 Other adjustments and expirations 659 (4,346 ) 9,141 (2,445 ) Claims activity (2,164 ) (3,773 ) (8,981 ) (14,372 ) Effect of change in exchange rates 277 523 (555 ) 1,800 Ending balance 43,360 34,922 43,360 34,922 Less: current portion of warranty 29,736 21,697 29,736 21,697 Long-term warranty $ 13,624 $ 13,225 $ 13,624 $ 13,225
Warranty Expense	Warranty expense (benefit) was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Total warranty expense (benefit) $ 1,528 $ (3,148 ) $ 12,291 $ (5,318 )
Health Benefit Plan Costs and Incurred But Not Reported Accrual Balance	Plan costs were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Plan costs $ 9,205 $ 6,096 $ 25,559 $ 21,592 The IBNR accrual, which is included in wages and benefits payable, was as follows: September 30, 2018 December 31, 2017 (in thousands) IBNR accrual $ 3,449 $ 2,664

Restructuring (Tables)

Restructuring (Tables)	9 Months Ended
	Sep. 30, 2018
Restructuring Project [Line Items]
Schedule of Restructuring Reserve by Type of Cost	The following table summarizes the activity within the restructuring related balance sheet accounts for the 2018 and 2016 Projects during the nine months ended September 30, 2018 : Accrued Employee Severance Asset Impairments & Net Loss on Sale or Disposal Other Accrued Costs Total (in thousands) Beginning balance, January 1, 2018 $ 37,654 $ — $ 2,471 $ 40,125 Costs charged to expense 79,011 568 3,329 82,908 Cash (payments) receipts (23,302 ) 332 (4,478 ) (27,448 ) Net assets disposed and impaired — (900 ) — (900 ) Effect of change in exchange rates (3,996 ) — (2 ) (3,998 ) Ending balance, September 30, 2018 $ 89,367 $ — $ 1,320 $ 90,687
2018 Projects [Member]
Restructuring Project [Line Items]
Restructuring and Related Costs	The total expected restructuring costs, the restructuring costs recognized, and the remaining expected restructuring costs related to the 2018 Projects are as follows: Total Expected Costs at September 30, 2018 Costs Recognized During the Nine Months Ended Expected Remaining Costs to be Recognized at September 30, 2018 (in thousands) Employee severance costs $ 81,669 $ 81,669 $ — Asset impairments & net loss on sale or disposal 115 115 — Other restructuring costs 19,356 1,280 18,076 Total $ 101,140 $ 83,064 $ 18,076 Segments: Electricity $ 20,609 $ 19,109 $ 1,500 Gas 52,289 41,583 10,706 Water 21,804 15,934 5,870 Corporate unallocated 6,438 6,438 — Total $ 101,140 $ 83,064 $ 18,076
2016 Projects [Member]
Restructuring Project [Line Items]
Restructuring and Related Costs	The total expected restructuring costs, the restructuring costs recognized, and the remaining expected restructuring costs related to the 2016 Projects are as follows: Total Expected Costs at September 30, 2018 Costs Recognized in Prior Periods Costs Recognized During the Nine Months Ended Expected Remaining Costs to be Recognized at September 30, 2018 (in thousands) Employee severance costs $ 37,197 $ 39,855 $ (2,658 ) $ — Asset impairments & net loss on sale or disposal 5,375 4,922 453 — Other restructuring costs 16,064 9,435 2,049 4,580 Total $ 58,636 $ 54,212 $ (156 ) $ 4,580 Segments: Electricity $ 11,029 $ 9,025 $ 696 $ 1,308 Gas 30,287 29,181 (791 ) 1,897 Water 14,678 13,761 (302 ) 1,219 Corporate unallocated 2,642 2,245 241 156 Total $ 58,636 $ 54,212 $ (156 ) $ 4,580

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2018
Stockholders' Equity Note [Abstract]
Total Comprehensive Income (Loss)	The before-tax amount, income tax (provision) benefit, and net-of-tax amount related to each component of OCI were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Before-tax amount Foreign currency translation adjustment $ (576 ) $ 14,169 $ (18,554 ) $ 49,755 Foreign currency translation adjustment reclassified into net income — 1,089 — 1,089 Net unrealized gain (loss) on derivative instruments designated as cash flow hedges 712 57 5,216 (480 ) Net hedging (gain) loss reclassified into net income 175 148 (2,198 ) 785 Net defined benefit plan loss reclassified to net income 399 447 1,228 1,271 Total other comprehensive income (loss), before tax 710 15,910 (14,308 ) 52,420 Tax (provision) benefit Foreign currency translation adjustment (102 ) (328 ) 16 (451 ) Net unrealized gain (loss) on derivative instruments designated as cash flow hedges (20 ) (22 ) (446 ) 185 Net hedging (gain) loss reclassified into net income 41 (57 ) (9 ) (303 ) Net defined benefit plan loss reclassified to net income (7 ) (37 ) (21 ) (267 ) Total other comprehensive income (loss) tax benefit (88 ) (444 ) (460 ) (836 ) Net-of-tax amount Foreign currency translation adjustment (678 ) 13,841 (18,538 ) 49,304 Foreign currency translation adjustment reclassified into net income — 1,089 — 1,089 Net unrealized gain (loss) on derivative instruments designated as cash flow hedges 692 35 4,770 (295 ) Net hedging (gain) loss reclassified into net income 216 91 (2,207 ) 482 Net defined benefit plan loss reclassified to net income 392 410 1,207 1,004 Total other comprehensive income (loss), net of tax $ 622 $ 15,466 $ (14,768 ) $ 51,584
Schedule of Accumulated Other Comprehensive Income (Loss)	The changes in the components of AOCI, net of tax, were as follows: Foreign Currency Translation Adjustments Net Unrealized Gain (Loss) on Derivative Instruments Net Unrealized Gain (Loss) on Nonderivative Instruments Pension Benefit Obligation Adjustments Accumulated Other Comprehensive Income (Loss) (in thousands) Balances at January 1, 2017 $ (182,986 ) $ 43 $ (14,380 ) $ (32,004 ) $ (229,327 ) OCI before reclassifications 49,304 (295 ) — — 49,009 Amounts reclassified from AOCI 1,089 482 — 1,004 2,575 Total other comprehensive income (loss) 50,393 187 — 1,004 51,584 Balances at September 30, 2017 $ (132,593 ) $ 230 $ (14,380 ) $ (31,000 ) $ (177,743 ) Balances at January 1, 2018 $ (128,648 ) $ 966 $ (14,380 ) $ (28,416 ) $ (170,478 ) OCI before reclassifications (18,538 ) 4,770 — — (13,768 ) Amounts reclassified from AOCI — (2,207 ) — 1,207 (1,000 ) Total other comprehensive income (loss) (18,538 ) 2,563 — 1,207 (14,768 ) Balances at September 30, 2018 $ (147,186 ) $ 3,529 $ (14,380 ) $ (27,209 ) $ (185,246 )

Fair Values of Financial Inst_2

Fair Values of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Schedule of Fair Values Of Financial Instruments by Balance Sheet Grouping	The following table presents the fair values of our financial instruments: September 30, 2018 December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value (in thousands) Assets Cash and cash equivalents $ 109,044 $ 109,044 $ 176,274 $ 176,274 Restricted cash 2,106 2,106 311,061 311,061 Foreign exchange forwards 69 69 41 41 Interest rate swaps 3,784 3,784 2,370 2,370 Interest rate caps 1,335 1,335 489 489 Cross currency swaps 2,449 2,449 — — Liabilities Credit facility USD denominated term loan $ 641,875 $ 649,686 $ 194,063 $ 192,295 Multicurrency revolving line of credit 10,000 10,137 125,414 124,100 Senior notes 400,000 383,000 300,000 301,125 Foreign exchange forwards 240 240 289 289

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Revenues Gross Profit And Operating Income By Segment	Revenues, gross profit, and operating income associated with our operating segments were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Product revenues Electricity $ 198,026 $ 199,784 $ 624,139 $ 620,958 Gas 148,660 124,556 408,300 372,555 Water 106,653 109,644 350,814 327,549 Networks 72,377 — 195,487 — Total Company $ 525,716 $ 433,984 $ 1,578,740 $ 1,321,062 Service revenues Electricity $ 38,816 $ 40,358 $ 115,686 $ 108,267 Gas 8,087 7,224 23,218 22,136 Water 5,931 5,181 17,601 15,956 Networks 17,412 — 53,828 — Total Company $ 70,246 $ 52,763 $ 210,333 $ 146,359 Total revenues Electricity $ 236,842 $ 240,142 $ 739,825 $ 729,225 Gas 156,747 131,780 431,518 394,691 Water 112,584 114,825 368,415 343,505 Networks 89,789 — 249,315 — Total Company $ 595,962 $ 486,747 $ 1,789,073 $ 1,467,421 Gross profit Electricity $ 74,549 $ 76,492 $ 221,511 $ 222,387 Gas 55,812 46,529 139,826 147,880 Water 35,139 42,734 110,779 131,402 Networks 31,597 — 81,413 — Total Company $ 197,097 $ 165,755 $ 553,529 $ 501,669 Operating income (loss) Electricity $ 25,853 $ 17,317 $ 52,082 $ 52,240 Gas 31,279 20,469 18,176 59,177 Water 6,859 15,032 3,973 40,702 Networks (15,624 ) — (119,353 ) — Corporate unallocated (6,691 ) (14,592 ) (33,087 ) (45,438 ) Total Company 41,676 38,226 (78,209 ) 106,681 Total other income (expense) (16,174 ) (4,732 ) (45,193 ) (16,559 ) Income (loss) before income taxes $ 25,502 $ 33,494 $ (123,402 ) $ 90,122
Revenues By Region	Revenues by region were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) United States and Canada $ 376,676 $ 259,796 $ 1,080,709 $ 824,630 Europe, Middle East, and Africa 177,356 171,924 564,178 493,505 Other (1) 41,930 55,027 144,186 149,286 Total revenues $ 595,962 $ 486,747 $ 1,789,073 $ 1,467,421 (1) The Other region includes our operations in Latin America and Asia Pacific.
Depreciation And Amortization Expense Associated With Segments	Depreciation and amortization expense associated with our operating segments was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Electricity $ 6,008 $ 6,687 $ 18,952 $ 17,772 Gas 4,363 5,084 12,819 13,831 Water 3,824 3,860 11,941 11,706 Networks 15,214 — 45,449 — Corporate unallocated 1,040 901 3,267 2,691 Total Company $ 30,449 $ 16,532 $ 92,428 $ 46,000 Subsequent Event

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2018
Revenues [Abstract]
Contract with Customer, Asset and Liability	A summary of significant net changes in the contract assets and the contract liabilities balances during the period is as follows: 2018 Contract liabilities, less contract assets (in thousands) Beginning balance, January 1 $ 59,808 Changes due to business combination 36,936 Revenues recognized from beginning contract liability (31,688 ) Increases due to amounts collected or due 200,428 Revenues recognized from current period increases (142,439 ) Other (847 ) Ending balance, September 30 $ 122,198

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Schedule of Business Acquisitions, by Acquisition	The following reflects our preliminary allocation of purchase price as of January 5, 2018: Fair Value Weighted Average Useful Life (in thousands) (in years) Current Assets $ 86,444 Property, plant, and equipment 27,670 Other long-term assets (1) (290 ) Identifiable intangible assets Core-developed technology 81,900 5 Customer contract and relationships 134,000 10 Trademark and trade names 10,800 3 Total identified intangible assets subject to amortization 226,700 8 In-process research and development (IPR&D) 14,400 Total identified intangible assets 241,100 Goodwill 570,790 Current liabilities (90,034 ) Customer contract and relationships (23,900 ) 5 Long-term liabilities (2,565 ) Total net assets acquired $ 809,215 (1)
SIlver Spring Networks, Inc. [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Schedule Of Revenues and Earnings Attributable to an Acquired Business		The following table presents the revenues and net loss from SSNI operations that are included in our Consolidated Statements of Operations: Three Months Ended September 30, 2018 January 5, 2018 - September 30, 2018 (in thousands) Revenues $ 89,789 $ 249,315 Net loss (10,738 ) (54,411 )
Business Acquisition, Pro Forma Information	The following supplemental pro forma results are based on the individual historical results of Itron and SSNI, with adjustments to give effect to the combined operations as if the acquisition had been consummated on January 1, 2017. Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 ( in thousands) Revenues $ 595,962 $ 534,315 $ 1,789,073 $ 1,826,824 Net income (loss) 19,882 5,462 (108,427 ) (1,532 )

Summary of Significant Accoun_4

Summary of Significant Accounting Policies Cash, Cash Equivalent, and Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	$ 109,044	$ 176,274	$ 137,584
Current restricted cash included in other current assets	51	51	0
Long-term restricted cash	2,055	311,010	0
Total cash, cash equivalents, and restricted cash	$ 111,150	$ 487,335	$ 137,584	$ 133,565

Summary of Significant Accoun_5

Summary of Significant Accounting Policies New Accounting Pronouncements (Details) $ in Millions	Dec. 31, 2017USD ($)
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	$ 10.9
Accounting Standards Update 2016-16 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	$ 0.9

Computation of Basic and Dilute

Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net income (loss) available to common shareholders	$ 19,882	$ 25,576	$ (123,127)	$ 55,518
Weighted average common shares outstanding - Basic (in shares)	39,340	38,713	39,177	38,624
Dilutive effect of stock-based awards (in shares)	569	754	0	715
Weighted average common shares outstanding - Diluted (in shares)	39,909	39,467	39,177	39,339
Earnings (loss) per common share - Basic (in dollars per share)	$ 0.51	$ 0.66	$ (3.14)	$ 1.44
Earnings (loss) per common share - Diluted (in dollars per share)	$ 0.50	$ 0.65	$ (3.14)	$ 1.41

Earnings Per Share Stock-based

Earnings Per Share Stock-based Awards (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Stock-based awards excluded from diluted EPS calculation (antidilutive) (in shares)	0.5	0.2	1.1	0.2

Certain Balance Sheet Compone_3

Certain Balance Sheet Components Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Accounts Receivable, Net, Current [Abstract]
Trade receivables (net of allowance of $3,822 and $3,957)	$ 422,567	$ 369,047
Unbilled receivables	27,025	28,982
Total accounts receivable, net	$ 449,592	$ 398,029

Certain Balance Sheet Compone_4

Certain Balance Sheet Components Accounts Receivable Allowance for Bad Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Accounts Receivable, Net, Current [Abstract]
Allowance	$ 3,822	$ 4,552	$ 3,957	$ 3,991	$ 3,502	$ 3,320

Certain Balance Sheet Compone_5

Certain Balance Sheet Components Summary of the Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accounts Receivable, Net, Current [Abstract]
Beginning balance	$ 4,552	$ 3,502	$ 3,957	$ 3,320
Provision (recovery) for doubtful accounts, net	(105)	769	1,149	1,513
Accounts written-off	(624)	(310)	(1,129)	(1,115)
Effect of change in exchange rates	(1)	30	(155)	273
Ending balance	$ 3,822	$ 3,991	$ 3,822	$ 3,991

Certain Balance Sheet Compone_6

Certain Balance Sheet Components Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Inventory, Net [Abstract]
Materials	$ 128,744	$ 126,656
Work in process	8,595	9,863
Finished goods	70,699	57,316
Total inventories	$ 208,038	$ 193,835

Certain Balance Sheet Compone_7

Certain Balance Sheet Components Property, Plant, and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment, Net [Abstract]
Machinery and equipment	$ 318,218	$ 310,753
Computers and software	112,681	104,384
Buildings, furniture, and improvements	149,934	135,566
Land	15,463	18,433
Construction in progress, including purchased equipment	41,423	39,946
Total cost	637,719	609,082
Accumulated depreciation	(416,924)	(408,314)
Property, plant, and equipment, net	$ 220,795	$ 200,768

Certain Balance Sheet Compone_8

Certain Balance Sheet Components Depreciation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 12,489	$ 10,907	$ 38,729	$ 30,856

Intangible Assets and Liabili_3

Intangible Assets and Liabilities Gross Carrying Amount and Accumulated Amortization (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Intangible Assets [Line Items]
Intangible assets, Gross	$ 993,438	$ 769,851
Intangible assets, Accumulated (Amortization) Accretion	(718,346)	(674,623)
Intangible assets, Net	275,092	95,228
Intangible assets, Gross	996,538	769,851	$ 764,036	$ 669,896
Intangible assets, Net	278,192	95,228
Intangible liabilities, Gross	(23,900)	0	$ 0	$ 0
Intangible liabilities, Accumulated (Amortization) Accretion	3,913	0
Intangible liabilities, Net	(19,987)	0
Core-developed technology [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	515,949	429,548
Intangible assets, Accumulated (Amortization) Accretion	(427,069)	(399,969)
Intangible assets, Net	88,880	29,579
Customer contracts and relationships [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	385,148	258,586
Intangible assets, Accumulated (Amortization) Accretion	(210,735)	(197,582)
Intangible assets, Net	174,413	61,004
Trademarks and trade names [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	79,739	70,056
Intangible assets, Accumulated (Amortization) Accretion	(69,376)	(66,004)
Intangible assets, Net	10,363	4,052
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	12,602	11,661
Intangible assets, Accumulated (Amortization) Accretion	(11,166)	(11,068)
Intangible assets, Net	1,436	593
In Process Research and Development [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	3,100	0
Intangible assets, Accumulated (Amortization) Accretion	0	0
Intangible assets, Net	$ 3,100	$ 0

Summary of Intangible Asset Acc

Summary of Intangible Asset Account Activity (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Total Intangible Assets [Abstract]
Beginning balance, intangible assets, gross	$ 769,851	$ 669,896
Finite-lived Intangible Assets Acquired	242,039	36,500
Effect of change in exchange rates	(15,352)	57,640
Ending balance, intangible assets, gross	996,538	764,036
Beginning balance, intangible liabilities, gross	0	0
Customer contract and relationships	(23,900)		$ 0
Effect of change in exchange rates	0	0
Ending balance, intangible liabilities, gross	$ (23,900)	$ 0

Intangible Assets and Liabili_4

Intangible Assets and Liabilities Estimated Future Annual Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Intangible Assets [Abstract]
2018 (amount remaining at September 30, 2018)	$ 19,547
2,019	72,681
2,020	52,727
2,021	37,314
2,022	27,160
Beyond 2,022	65,663
Total intangible assets subject to amortization (accretion)	275,092	$ 95,228
2018 (amount remaining at September 30, 2018)	(1,304)
2,019	(8,233)
2,020	(8,028)
2,021	(1,963)
2,022	(459)
Beyond 2,022	0
Intangible liabilities, Net	(19,987)	$ 0
2018 (amount remaining at September 30, 2018)	18,243
2,019	64,448
2,020	44,699
2,021	35,351
2,022	26,701
Beyond 2,022	65,663
Total intangible assets (liabilities), net	$ 255,105

Intangible Assets and Liabili_5

Intangible Assets and Liabilities Intangible Assets Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jan. 05, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Business acquisition, percentage of voting interest acquired					100.00%
In process research and development completed			$ 11,300
Amortization of intangible assets	$ 17,960	$ 5,625	$ 53,699	$ 15,144

Schedule of Goodwill Allocated

Schedule of Goodwill Allocated to Reporting Segments (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Goodwill [Roll Forward]
Goodwill before impairment, at beginning of period	$ 1,232,229
Accumulated impairment losses, at beginning of period	(676,467)
Goodwill, net, at beginning of period	555,762
Goodwill acquired	570,790
Effect of change in exchange rates	(4,657)
Goodwill before impairment, at end of period	1,791,125
Accumulated impairment losses, at end of period	(669,230)
Goodwill, net, at end of period	555,762	$ 1,121,895
Electricity Operating Segment [Member]
Goodwill [Roll Forward]
Goodwill before impairment, at beginning of period	500,625
Accumulated impairment losses, at beginning of period	(386,384)
Goodwill, net, at beginning of period	114,241
Goodwill acquired	0
Effect of change in exchange rates	(370)
Goodwill before impairment, at end of period	496,565
Accumulated impairment losses, at end of period	(382,694)
Goodwill, net, at end of period	114,241	113,871
Gas Operating Segment [Member]
Goodwill [Roll Forward]
Goodwill before impairment, at beginning of period	352,703
Accumulated impairment losses, at beginning of period	0
Goodwill, net, at beginning of period	352,703
Goodwill acquired	0
Effect of change in exchange rates	(3,259)
Goodwill before impairment, at end of period	349,444
Accumulated impairment losses, at end of period	0
Goodwill, net, at end of period	352,703	349,444
Water Operating Segment [Member]
Goodwill [Roll Forward]
Goodwill before impairment, at beginning of period	378,901
Accumulated impairment losses, at beginning of period	(290,083)
Goodwill, net, at beginning of period	88,818
Goodwill acquired	0
Effect of change in exchange rates	(785)
Goodwill before impairment, at end of period	374,569
Accumulated impairment losses, at end of period	(286,536)
Goodwill, net, at end of period	88,818	88,033
Networks Operating Segment [Member]
Goodwill [Roll Forward]
Goodwill before impairment, at beginning of period	0
Accumulated impairment losses, at beginning of period	0
Goodwill, net, at beginning of period	0
Goodwill acquired	570,790
Effect of change in exchange rates	(243)
Goodwill before impairment, at end of period	570,547
Accumulated impairment losses, at end of period	0
Goodwill, net, at end of period	$ 0	$ 570,547

Schedule of Debt (Details)

Schedule of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 19, 2018	Dec. 31, 2017	Dec. 22, 2017
Debt Instrument [Line Items]
Senior notes		$ 100,000		$ 300,000
Total debt	$ 651,875
Current portion of debt	24,375		$ 19,688
Long-term debt	1,005,377		593,572
2018 (amount remaining at September 30, 2018)	4,063
2,019	28,438
2,020	44,777
2,021	60,937
2,022	65,000
2,023	448,660
Secured Debt [Member]
Debt Instrument [Line Items]
Total debt	1,051,875		619,477
Current portion of debt	24,375		19,688
Long-term debt	1,005,377		593,572
USD Denominated Term Loan [Member]
Debt Instrument [Line Items]
USD denominated term loan	641,875		194,063
Unamortized prepaid debt fees	5,208		629
Line of Credit [Member]
Debt Instrument [Line Items]
Multicurrency revolving line of credit	10,000		125,414
Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes	400,000		300,000
Unamortized prepaid debt fees	$ 16,915		$ 5,588

Credit Facility Additional Info

Credit Facility Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Jan. 05, 2018	Dec. 31, 2017	Jun. 23, 2015
Debt Instrument [Line Items]
Debt instrument, face amount		$ 1,200,000		$ 725,000
Line of credit facility, maximum borrowing capacity		500,000
Swingline sub-facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		50,000
Line of credit facility, amount outstanding	$ 0
USD Denominated Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument, face amount		$ 650,000
Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	10,000		$ 125,414
Line of credit facility, remaining borrowing capacity	448,892		$ 342,705
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300,000
Secured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, collateral	All obligations under the 2018 credit facility are guaranteed by Itron, Inc. and material U.S. domestic subsidiaries and are secured by a pledge of substantially all of the assets of Itron, Inc. and material U.S. domestic subsidiaries, including a pledge of their related assets. This includes a pledge of 100% of the capital stock of material U.S. domestic subsidiaries and up to 66% of the voting stock (100% of the non-voting stock) of first-tier foreign subsidiaries. In addition, the obligations of any foreign subsidiary who is a foreign borrower, as defined by the 2018 credit facility, are guaranteed by the foreign subsidiary and by its direct and indirect foreign parents.
Minimum [Member]
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.18%
Maximum [Member]
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.35%
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	the LIBOR rate
Debt instrument, basis spread on variable rate	2.00%
Applicable interest rate	4.25%
EURIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	EURIBOR rate
Alternate base rate (1) [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	the prime rate
Alternate base rate (2) [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	the Federal Reserve effective rate
Debt instrument, basis spread on variable rate	0.50%
Alternate base rate (3) [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	one-month LIBOR
Debt instrument, basis spread on variable rate	1.00%
Alternate base rate [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	Alternate Base Rate

Debt Senior Note Additional Inf

Debt Senior Note Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended		36 Months Ended	37 Months Ended
	Jan. 14, 2023	Jan. 14, 2022	Jan. 15, 2026	Jan. 14, 2021	Sep. 30, 2018	Apr. 30, 2018	Jan. 19, 2018	Dec. 31, 2017	Dec. 22, 2017
Senior Note Additional Information [Abstract]
Senior notes							$ 100,000		$ 300,000
Debt Instrument [Line Items]
Debt Instrument, interest rate, stated percentage						1.38%
Senior Notes [Member]
Senior Note Additional Information [Abstract]
Senior notes					$ 400,000			$ 300,000
Debt Instrument [Line Items]
Debt Instrument, interest rate, stated percentage								5.00%
Scenario, Forecast [Member] | Debt Instrument, Redemption, Period One [Member]
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		102.50%
Scenario, Forecast [Member] | Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage	101.25%
Scenario, Forecast [Member] | Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage			100.00%
Scenario, Forecast [Member] | Debt Instrument, Redemption, Period Four [Member]
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage				105.00%
Scenario, Forecast [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage				35.00%
Scenario, Forecast [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage				65.00%

Derivative and Nonderivative He

Derivative and Nonderivative Hedging Instrument Fair Value Disclosure (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Asset Derivatives [Abstract]
Gross Amounts of Recognized Assets Presented in the Consolidated Balance Sheets	$ 7,637,000	$ 2,900,000
Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Asset Derivatives [Abstract]
Foreign currency derivative instruments not designated as hedging instruments, asset at fair value	69,000	41,000
Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Liability Derivatives [Abstract]
Foreign exchange forward contracts	240,000	289,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Asset Derivatives [Abstract]
Interest rate derivative assets, at fair value	2,051,000	658,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Asset Derivatives [Abstract]
Interest rate derivative assets, at fair value	1,733,000	1,712,000
Interest Rate Cap [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Asset Derivatives [Abstract]
Interest rate derivative assets, at fair value	607,000	17,000
Interest Rate Cap [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Asset Derivatives [Abstract]
Interest rate derivative assets, at fair value	728,000	179,000
Interest Rate Cap [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Asset Derivatives [Abstract]
Interest rate derivative assets, at fair value	0	25,000
Interest Rate Cap [Member] | Not Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Asset Derivatives [Abstract]
Interest rate derivative assets, at fair value	0	268,000
Currency Swap [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Asset Derivatives [Abstract]
Foreign currency fair value hedge asset at fair value	1,711,000	0
Currency Swap [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Asset Derivatives [Abstract]
Foreign currency fair value hedge asset at fair value	$ 738,000	$ 0

Activity of Hedging Instruments

Activity of Hedging Instruments in Accumulated OCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net unrealized gain (loss) on hedging instruments at January 1,			$ (170,478)
Unrealized gain (loss) on derivative instruments	$ 692	$ 35	4,770	$ (295)
Realized losses reclassified into net income (loss)	216	91	(2,207)	482
Net unrealized gain (loss) on hedging instruments at September 30,	(185,246)		(185,246)
Accumulated Net Gain (Loss) from Derivative and Nonderivative Instruments Designated as Hedging Instruments [Member]
Net unrealized gain (loss) on hedging instruments at January 1,			(13,414)	(14,337)
Net unrealized gain (loss) on hedging instruments at September 30,	$ (10,851)	$ (14,150)	$ (10,851)	$ (14,150)

Offsetting of Derivative Assets

Offsetting of Derivative Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross Amounts of Recognized Assets Presented in the Consolidated Balance Sheets	$ 7,637	$ 2,900
Derivative Financial Instruments Not Offset in the Consolidated Balance Sheets	(102)	(90)
Cash Collateral Received Not Offset in the Consolidated Balance Sheets	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	$ 7,535	$ 2,810

Offsetting of Derivative Liabil

Offsetting of Derivative Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross Amounts of Recognized Liabilities Presented in the Consolidated Balance Sheets	$ 240	$ 289
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	(102)	(90)
Cash Collateral Pledged Not Offset in the Consolidated Balance Sheets	0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ 138	$ 199

Derivative Financial Instrume_3

Derivative Financial Instruments Narrative (Details)	12 Months Ended
	Dec. 31, 2015USD ($)	Sep. 30, 2018USD ($)contracts	Apr. 30, 2018USD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Dec. 31, 2016USD ($)
Net unrealized loss on hedging instruments		$ 185,246,000		$ 170,478,000
Total debt		651,875,000
Debt Instrument, interest rate, stated percentage			1.38%
Secured Debt [Member]
Total debt		1,051,875,000		619,477,000
Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments [Member]
Net unrealized loss on hedging instruments		$ 14,380,000		$ 14,380,000	$ 14,380,000	$ 14,380,000
Number of Counterparties [Member]
Derivative counterparties		5		3
Interest Rate Swap [Member]
Number of interest rate derivatives held		1
Derivative, notional amount		$ 214,000,000
Pay fixed interest rate in interest rate swap		1.42%
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net		$ 2,100,000
Interest Rate Cap [Member]
Number of interest rate derivatives held		3
Derivative, notional amount		$ 100,000,000
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net		$ (100,000)
Derivative purchase price	$ 1,700,000
Derivative, cap interest rate		2.00%
Currency Swap [Member]
Derivative, notional amount			$ 56,000,000
Foreign currency cash flow hedge gain (loss) to be reclassified during next 12 months			$ 1,700,000
Forward Contracts [Member]
Number of foreign exchange contracts | contracts		52
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Minimum [Member]
Derivative, notional amount		$ 183,000
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Maximum [Member]
Derivative, notional amount		55,500,000
London Interbank Offered Rate (LIBOR) [Member] | Secured Debt [Member]
Total debt		$ 652,000,000

Effect of Cash Flow Derivatives

Effect of Cash Flow Derivatives on the Balance Sheet and Income Statement, Before Tax (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from AOCI into Income	$ (175)	$ (148)	$ 2,198	$ (785)
Interest Rate Swap [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative	302	81	2,062	(255)
Interest Rate Swap [Member] | Interest Expense [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from AOCI into Income	314	(92)	649	(637)
Interest Rate Cap [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative	(220)	(24)	149	(225)
Interest Rate Cap [Member] | Interest Expense [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from AOCI into Income	(149)	(55)	(685)	(148)
Currency Swap 1 [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative	599	0	2,975	0
Currency Swap 2 [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative	0	0	0	0
Currency Swap [Member] | Interest Expense [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from AOCI into Income	363	0	570	0
Currency Swap [Member] | Other Income (Expense) [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from AOCI into Income	$ (733)	$ 0	$ 1,635	$ 0

Derivatives Not Designated as H

Derivatives Not Designated as Hedging Relationships (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other Income (Expense) [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Foreign exchange forward contracts	$ (1,149)	$ (1,760)	$ 964	$ (5,565)
Interest Rate Cap [Member] | Interest Expense [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Interest rate cap contracts	$ 0	$ (36)	$ 377	$ (337)

Schedule of Amounts Recognized

Schedule of Amounts Recognized in the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Defined Benefit Plan [Abstract]
Plan assets in other long-term assets	$ 911	$ 991
Current portion of pension benefit obligation in wages and benefits payable	3,091	3,260
Long-term portion of pension benefit obligation	96,081	95,717
Pension benefit obligation, net	$ 98,261	$ 97,986

Schedule of Net Periodic Pensio

Schedule of Net Periodic Pension Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Defined Benefit Plan [Abstract]
Service cost	$ 1,008	$ 994	$ 3,025	$ 2,846
Interest cost	567	568	1,767	1,628
Expected return on plan assets	(160)	(152)	(510)	(445)
Amortization of actuarial net loss	383	431	1,178	1,225
Amortization of unrecognized prior service costs	16	16	50	46
Net periodic benefit cost	$ 1,814	$ 1,857	$ 5,510	$ 5,300

Stock-Based Compensation Expens

Stock-Based Compensation Expense and Related Tax Benefit (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options	$ 911	$ 717	$ 2,694	$ 1,974
Restricted stock units	5,381	4,170	19,803	12,538
Unrestricted stock awards	158	232	572	742
Total stock-based compensation	7,212	5,745	25,108	16,764
Related tax benefit	1,259	1,192	4,387	3,520
Phantom Share Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Phantom stock units	$ 762	$ 626	$ 2,039	$ 1,510

Stock Option Summary (Details)

Stock Option Summary (Details) - Employee Stock Option [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
[Line Items]
Outstanding, beginning balance (in shares)	956	959	959
Outstanding, beginning balance, weighted average exercise price per share (in dollars per share)	$ 47.10	$ 45.64	$ 45.64
Outstanding, weighted average remaining contractual life	6 years 7 months 6 days	6 years 6 months	6 years 3 months 18 days	6 years 7 months 6 days
Outstanding, beginning balance, aggregate intrinsic value	$ 21,965	$ 19,125	$ 19,125
Shares converted upon acquisition (in shares)	42
Shares converted upon acquisition, weighted average exercise price (in dollars per share)	$ 51.86
Shares converted upon acquisition, weighted average grant date fair value	$ 14.86
Granted (in shares)	117	135
Granted, weighted average exercise price (in dollars per share)	$ 68.90	$ 65.94
Granted, weighted average grant date fair value	$ 24.55	$ 21.98
Exercised (in shares)	(151)	(36)
Exercised, weighted average exercise price (in dollars per share)	$ 38.98	$ 38.68
Exercised, aggregate intrinsic value	$ 4,509	$ 972
Forfeited (in share)	(3)	(35)
Forfeited, weighted average grant date fair value (in dollars per share)	$ 68.43	$ 47.38
Expired (in shares)	(66)	(47)
Expired, weighted average exercise price (in dollars per share)	$ 95.31	$ 67.43
Outstanding, ending balance (in shares)	895	976	956	959
Outstanding, ending balance, weighted average exercise price per share (in dollars per share)	$ 47.92	$ 47.60	$ 47.10	$ 45.64
Outstanding, weighted average remaining contractual life	6 years 7 months 6 days	6 years 6 months	6 years 3 months 18 days	6 years 7 months 6 days
Outstanding, ending balance, aggregate intrinsic value	$ 15,332	$ 30,320	$ 21,965	$ 19,125
Exercisable (in shares)	590
Exercisable, weighted average exercise price (in dollars per share)	$ 42.53
Exercisable, weighted average remaining contractual term	5 years 7 months 6 days
Exercisable, aggregate intrinsic value	$ 12,867
Expected to Vest [Member]
[Line Items]
Outstanding, weighted average remaining contractual life	8 years 6 months
Outstanding, ending balance (in shares)	305
Outstanding, ending balance, weighted average exercise price per share (in dollars per share)	$ 58.35
Outstanding, weighted average remaining contractual life	8 years 6 months
Outstanding, ending balance, aggregate intrinsic value	$ 2,466

Stock Option Black Scholes Opti

Stock Option Black Scholes Option Pricing Model Assumptions (Details) - Employee Stock Option [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Expected volatility	28.60%	29.00%	30.60%	32.50%
Risk-free interest rate	2.90%	1.80%	2.80%	2.00%
Expected term (years)	6 years 1 month 6 days	5 years 6 months	6 years 1 month 6 days	5 years 6 months

Stock-Based Compensation Restri

Stock-Based Compensation Restricted Stock Units Summary (Details) - Restricted Stock Units (RSUs) [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
[Line Items]
Outstanding, beginning balance (in shares)		556	701
Outstanding, beginning balance, weighted average grant date fair value (in dollars per share)		$ 47.68
Converted upon acquisition (in shares)		579
Converted upon acquisition, weighted average grant date fair value (in dollars per share)		$ 69.40
Granted (in shares)		262	141
Granted, weighted average grant date fair value (in dollars per share)		$ 65.22	$ 65.54
Forfeited (in shares)		(102)	(23)
Forfeited, weighted average grant date fair value (in dollars per share)		$ 68.15
Outstanding, ending balance (in shares)	479	801	479
Outstanding, ending balance, weighted average grant date fair value (in dollars per share)		$ 62.57
Vested and Released [Member]
[Line Items]
Released (in shares)		(494)	(340)
Released, weighted average grant date fair value (in dollars per share)		$ 54.08
Released, aggregate intrinsic value		$ 26,753	$ 13,097
Vested but Not Released [Member]
[Line Items]
Released (in shares)		(9)
Released, aggregate intrinsic value		$ 586
Expected to Vest [Member]
[Line Items]
Outstanding, ending balance (in shares)		741
Expected to vest, aggregate intrinsic value		$ 47,554
Long Term Performance Restricted Stock Award [Member]
[Line Items]
Expected volatility	27.90%	28.00%	28.00%
Risk-free interest rate	1.40%	2.20%	1.00%
Expected term (years)	2 years 3 months 18 days	2 years 1 month 6 days	1 year 8 months 12 days
Granted, weighted average grant date fair value (in dollars per share)	$ 80.64	$ 78.56	$ 77.75

Stock-Based Compensation Long-T

Stock-Based Compensation Long-Term Performance Restricted Stock Unit Award Monte Carlo Pricing Model Assumptions (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, weighted average grant date fair value (in dollars per share)		$ 65.22	$ 65.54
Long Term Performance Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	27.90%	28.00%	28.00%
Risk-free interest rate	1.40%	2.20%	1.00%
Expected term (years)	2 years 3 months 18 days	2 years 1 month 6 days	1 year 8 months 12 days
Granted, weighted average grant date fair value (in dollars per share)	$ 80.64	$ 78.56	$ 77.75

Stock-Based Compensation Phanto

Stock-Based Compensation Phantom Stock Units Summary (Details) - Phantom Share Units (PSUs) [Member] - $ / shares shares in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, beginning balance (in shares)	63	62
Outstanding, beginning balance, weighted average grant date fair value (in dollars per share)	$ 51.88
Converted upon acquisition (in shares)	21
Converted upon acquisition, weighted average grant date fair value (in dollars per share)	$ 69.40
Granted (in shares)	37	32
Granted, weighted average grant date fair value (in dollars per share)	$ 68.06	$ 65.55
Released (in shares)	(34)	(20)
Released, weighted average grant date fair value (in dollars per share)	$ 53.55
Forfeited (in shares)	(3)	(7)
Forfeited, weighted average grant date fair value (in dollars per share)	$ 56.47
Outstanding, ending balance (in shares)	84	67
Outstanding, ending balance, weighted average grant date fair value (in dollars per share)	$ 62.53
Expected to Vest [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, ending balance (in shares)	84	67

Stock-Based Compensation Narrat

Stock-Based Compensation Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2018USD ($)shares	Dec. 31, 2017USD ($)
Employee Stock Option [Member]
[Line Items]
Compensation cost not yet recognized | $	$ 3.5
Unrecognized compensation expense, Expected weighted average period for recognition (years)	1 year 7 months 6 days
Restricted Stock Units (RSUs) [Member]
[Line Items]
Compensation cost not yet recognized | $	$ 46
Unrecognized compensation expense, Expected weighted average period for recognition (years)	2 years 1 month 6 days
Phantom Share Units (PSUs) [Member]
[Line Items]
Compensation cost not yet recognized | $	$ 3.9
Unrecognized compensation expense, Expected weighted average period for recognition (years)	2 years
Deferred compensation share-based Arrangements, liability, current | $	$ 1.7	$ 1.7
Employee Stock Purchase Plan [Member]
[Line Items]
Share-based compensation arrangement by share-based payment award, number of shares available for grant (in shares) | shares	305,979
Stock Incentive Plan [Member]
[Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized (in shares) | shares	12,623,538
Share-based compensation arrangement by share-based payment award, number of shares available for grant (in shares) | shares	6,449,209
Reduction in stock options available for issue	1
Authorized share reserve reduction in awards other than stock options or share appreciation rights available for issue, conversion ratio	1.7
SSNI Plan [Member]
[Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized (in shares) | shares	2,880,039

Income Tax Contingencies (Detai

Income Tax Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Net interest and penalties expense (benefit)	$ 414	$ (746)	$ 1,152	$ (334)
Accrued interest	3,707		3,707		$ 2,706
Accrued penalties	2,396		2,396		2,426
Unrecognized tax benefits related to uncertain tax positions	78,332		78,332		56,702
The amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate	$ 76,958		$ 76,958		$ 55,312

Income Taxes Narrative (Details

Income Taxes Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Examination [Line Items]
Effective income tax rate reconciliation, percent	22.00%	20.00%	1.00%	36.00%
Unrecognized tax benefits	$ 78,332		$ 78,332		$ 56,702
Effective income tax rate reconciliation, at federal statutory income tax rate, percent	21.00%	35.00%	21.00%	35.00%
Minimum [Member]
Income Tax Examination [Line Items]
Open tax year			2,010
Maximum [Member]
Income Tax Examination [Line Items]
Open tax year			2,016
SSNI Plan [Member]
Income Tax Examination [Line Items]
Unrecognized tax benefits	$ 16,700		$ 16,700

Commitments and Contingencies A

Commitments and Contingencies Available Lines of Credit, Outstanding Standby Letter of Credits, and Bonds (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 05, 2018	Dec. 31, 2017
Line of Credit Facility [Line Items]
Multicurrency revolving line of credit		$ 500,000
Net available for additional standby LOCs under sub-facility	$ 258,892		$ 218,119
Credit Facility [Member]
Line of Credit Facility [Line Items]
Multicurrency revolving line of credit	500,000		500,000
Long-term Line of Credit	(10,000)		(125,414)
Letters of Credit Outstanding, Amount	(41,108)		(31,881)
Unsecured Multicurrency Revolving Lines of Credit [Member]
Line of Credit Facility [Line Items]
Multicurrency revolving line of credit	106,281		110,477
Letters of Credit Outstanding, Amount	(19,577)		(21,030)
Short-term borrowings	(180)		(916)
Line of Credit Facility, Remaining Borrowing Capacity	86,524		88,531
Surety Bond [Member]
Line of Credit Facility [Line Items]
Unsecured surety bonds in force	96,157		51,344
Line of Credit [Member]
Line of Credit Facility [Line Items]
Long-term Line of Credit	(10,000)		(125,414)
Line of Credit Facility, Remaining Borrowing Capacity	$ 448,892		$ 342,705

Commitments and Contingencies W

Commitments and Contingencies Warranty Account Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Beginning balance	$ 43,719	$ 39,810	$ 34,862	$ 43,302
Assumed liabilities from acquisition	0	0	5,742	0
New product warranties	869	2,708	3,151	6,637
Other changes/adjustments to warranties	659	(4,346)	9,141	(2,445)
Claims activity	(2,164)	(3,773)	(8,981)	(14,372)
Effect of change in exchange rates	277	523	(555)	1,800
Ending balance	43,360	34,922	43,360	34,922
Less: current portion of warranty	29,736	21,697	29,736	21,697
Long-term warranty	$ 13,624	$ 13,225	$ 13,624	$ 13,225

Commitments and Contingencies_2

Commitments and Contingencies Warranty Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Total warranty expense (benefit)	$ 1,528	$ (3,148)	$ 12,291	$ (5,318)
Unusual or Infrequent Item, or Both, Insurance Proceeds		$ 8,000		$ 8,000

Commitments and Contingencies H

Commitments and Contingencies Health Benefit Plan Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
US Employee Group Health Insurance Expense	$ 9,205	$ 6,096	$ 25,559	$ 21,592

Commitments and Contingencies I

Commitments and Contingencies Incurred But Not Reported Health Benefit Cost Accrual (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
IBNR Accrual	$ 3,449	$ 2,664

Restructuring Restructuring Exp

Restructuring Restructuring Expected Costs - 2018 Projects (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 666	$ (678)	$ 82,908	$ 7,417
2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	101,140		101,140
Restructuring			83,064
Restructuring and Related Cost, Expected Cost Remaining	18,076		18,076
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			79,011
Employee Severance [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	81,669		81,669
Restructuring			81,669
Restructuring and Related Cost, Expected Cost Remaining	0		0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			3,329
Other Restructuring [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	19,356		19,356
Restructuring			1,280
Restructuring and Related Cost, Expected Cost Remaining	18,076		18,076
Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			568
Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	115		115
Restructuring			115
Restructuring and Related Cost, Expected Cost Remaining	0		0
Electricity Operating Segment [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	20,609		20,609
Restructuring			19,109
Restructuring and Related Cost, Expected Cost Remaining	1,500		1,500
Gas Operating Segment [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	52,289		52,289
Restructuring			41,583
Restructuring and Related Cost, Expected Cost Remaining	10,706		10,706
Water Operating Segment [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	21,804		21,804
Restructuring			15,934
Restructuring and Related Cost, Expected Cost Remaining	5,870		5,870
Corporate, Non-Segment [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	6,438		6,438
Restructuring			6,438
Restructuring and Related Cost, Expected Cost Remaining	$ 0		$ 0

Restructuring Expected Costs -

Restructuring Expected Costs - 2016 Projects (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 666	$ (678)	$ 82,908	$ 7,417
2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	58,636		58,636
Restructuring and Related Cost, Cost Incurred to Date					$ 54,212
Restructuring			(156)
Remaining Costs to be Recognized at Period End	4,580		4,580
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			79,011
Employee Severance [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	37,197		37,197
Restructuring and Related Cost, Cost Incurred to Date					39,855
Restructuring			(2,658)
Remaining Costs to be Recognized at Period End	0		0
Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			568
Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	5,375		5,375
Restructuring and Related Cost, Cost Incurred to Date					4,922
Restructuring			453
Remaining Costs to be Recognized at Period End	0		0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			3,329
Other Restructuring [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	16,064		16,064
Restructuring and Related Cost, Cost Incurred to Date					9,435
Restructuring			2,049
Remaining Costs to be Recognized at Period End	4,580		4,580
Electricity Operating Segment [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	11,029		11,029
Restructuring and Related Cost, Cost Incurred to Date					9,025
Restructuring			696
Remaining Costs to be Recognized at Period End	1,308		1,308
Gas Operating Segment [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	30,287		30,287
Restructuring and Related Cost, Cost Incurred to Date					29,181
Restructuring			(791)
Remaining Costs to be Recognized at Period End	1,897		1,897
Water Operating Segment [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	14,678		14,678
Restructuring and Related Cost, Cost Incurred to Date					13,761
Restructuring			(302)
Remaining Costs to be Recognized at Period End	1,219		1,219
Corporate, Non-Segment [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	2,642		2,642
Restructuring and Related Cost, Cost Incurred to Date					$ 2,245
Restructuring			241
Remaining Costs to be Recognized at Period End	$ 156		$ 156

Restructuring Related Balance S

Restructuring Related Balance Sheet Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Beginning balance, January 1, 2018			$ 40,125
Costs charged to expense	$ 666	$ (678)	82,908	$ 7,417
Cash (payments) receipts			(27,448)
Net assets disposed and impaired			(900)
Effect of change in exchange rates			(3,998)
Ending balance, September 30, 2018	90,687		90,687
Accrued Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, January 1, 2018			37,654
Costs charged to expense			79,011
Cash (payments) receipts			(23,302)
Net assets disposed and impaired			0
Effect of change in exchange rates			(3,996)
Ending balance, September 30, 2018	89,367		89,367
Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, January 1, 2018			0
Costs charged to expense			568
Cash (payments) receipts			332
Net assets disposed and impaired			(900)
Effect of change in exchange rates			0
Ending balance, September 30, 2018	0		0
Other Accrued Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, January 1, 2018			2,471
Costs charged to expense			3,329
Cash (payments) receipts			(4,478)
Net assets disposed and impaired			0
Effect of change in exchange rates			(2)
Ending balance, September 30, 2018	$ 1,320		$ 1,320

Restructuring Additional Inform

Restructuring Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Restructuring and Related Activities [Abstract]
Restructuring reserve, current	$ 42.2	$ 32.5
Restructuring reserve, noncurrent	$ 48.5	$ 7.6

Shareholders' Equity Preferred

Shareholders' Equity Preferred Stock (Details) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Equity [Abstract]
Preferred stock, shares authorized (in share)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, no par value (in dollars per share)	$ 0

Shareholders' Equity Other Comp

Shareholders' Equity Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Before-tax amount [Abstract]
Foreign currency translation adjustment	$ (576)	$ 14,169	$ (18,554)	$ 49,755
Foreign currency translation adjustment reclassified into net income	0	1,089	0	1,089
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges	712	57	5,216	(480)
Net hedging (gain) loss reclassified into net income	175	148	(2,198)	785
Net defined benefit plan loss reclassified to net income	399	447	1,228	1,271
Total other comprehensive income (loss), before tax	710	15,910	(14,308)	52,420
Tax (provision) benefit [Abstract]
Foreign currency translation adjustment	(102)	(328)	16	(451)
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges	(20)	(22)	(446)	185
Net hedging (gain) loss reclassified into net income	41	(57)	(9)	(303)
Net defined benefit plan loss reclassified to net income	(7)	(37)	(21)	(267)
Total other comprehensive income (loss) tax benefit	(88)	(444)	(460)	(836)
Net-of-tax amount [Abstract]
Foreign currency translation adjustment	(678)	13,841	(18,538)	49,304
Foreign currency translation adjustment reclassified into net income	0	1,089	0	1,089
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges	692	35	4,770	(295)
Net hedging (gain) loss reclassified into net income	216	91	(2,207)	482
Net defined benefit plan loss reclassified to net income	392	410	1,207	1,004
Total other comprehensive income (loss), net of tax	$ 622	$ 15,466	$ (14,768)	$ 51,584

Shareholders' Equity Accumulate

Shareholders' Equity Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gain (loss) on hedging instruments at January 1,			$ (170,478)
Amounts reclassified from AOCI	$ 0	$ 1,089	0	$ 1,089
Total other comprehensive income (loss), net of tax	622	15,466	(14,768)	51,584
Net unrealized gain (loss) on hedging instruments at September 30,	(185,246)		(185,246)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gain (loss) on hedging instruments at January 1,			(170,478)	(229,327)
OCI before reclassifications			(13,768)	49,009
Amounts reclassified from AOCI			(1,000)	2,575
Total other comprehensive income (loss), net of tax			(14,768)	51,584
Net unrealized gain (loss) on hedging instruments at September 30,	(185,246)	(177,743)	(185,246)	(177,743)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gain (loss) on hedging instruments at January 1,			(128,648)	(182,986)
OCI before reclassifications			(18,538)	49,304
Amounts reclassified from AOCI			0	1,089
Total other comprehensive income (loss), net of tax			(18,538)	50,393
Net unrealized gain (loss) on hedging instruments at September 30,	(147,186)	(132,593)	(147,186)	(132,593)
Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gain (loss) on hedging instruments at January 1,			966	43
OCI before reclassifications			4,770	(295)
Amounts reclassified from AOCI			(2,207)	482
Total other comprehensive income (loss), net of tax			2,563	187
Net unrealized gain (loss) on hedging instruments at September 30,	3,529	230	3,529	230
Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gain (loss) on hedging instruments at January 1,			(14,380)	(14,380)
OCI before reclassifications			0	0
Amounts reclassified from AOCI			0	0
Total other comprehensive income (loss), net of tax			0	0
Net unrealized gain (loss) on hedging instruments at September 30,	(14,380)	(14,380)	(14,380)	(14,380)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gain (loss) on hedging instruments at January 1,			(28,416)	(32,004)
OCI before reclassifications			0	0
Amounts reclassified from AOCI			1,207	1,004
Total other comprehensive income (loss), net of tax			1,207	1,004
Net unrealized gain (loss) on hedging instruments at September 30,	$ (27,209)	$ (31,000)	$ (27,209)	$ (31,000)

Schedule of Fair Values of Fina

Schedule of Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 19, 2018	Dec. 31, 2017	Dec. 22, 2017	Sep. 30, 2017
Assets
Cash and cash equivalents	$ 109,044		$ 176,274		$ 137,584
Liabilities
Senior notes		$ 100,000		$ 300,000
USD Denominated Term Loan [Member]
Liabilities
USD denominated term loan	641,875		194,063
Line of Credit [Member]
Liabilities
Multicurrency revolving line of credit	10,000		125,414
Reported Value Measurement [Member]
Assets
Cash and cash equivalents	109,044		176,274
Restricted cash	2,106		311,061
Foreign exchange forwards	69		41
Liabilities
Senior notes	400,000		300,000
Foreign exchange forwards	240		289
Reported Value Measurement [Member] | USD Denominated Term Loan [Member]
Liabilities
USD denominated term loan	641,875		194,063
Reported Value Measurement [Member] | Line of Credit [Member]
Liabilities
Multicurrency revolving line of credit	10,000		125,414
Reported Value Measurement [Member] | Interest Rate Swap [Member]
Assets
Derivative asset, noncurrent	3,784		2,370
Reported Value Measurement [Member] | Interest Rate Cap [Member]
Assets
Derivative asset, noncurrent	1,335		489
Reported Value Measurement [Member] | Currency Swap [Member]
Assets
Derivative asset, noncurrent	2,449		0
Estimate of Fair Value Measurement [Member]
Assets
Cash and cash equivalents	109,044		176,274
Restricted cash	2,106		311,061
Foreign exchange forwards	69		41
Liabilities
Senior notes	383,000		301,125
Foreign exchange forwards	240		289
Estimate of Fair Value Measurement [Member] | USD Denominated Term Loan [Member]
Liabilities
USD denominated term loan, fair value	649,686		192,295
Estimate of Fair Value Measurement [Member] | Line of Credit [Member]
Liabilities
Multicurrency revolving line of credit, fair value	10,137		124,100
Estimate of Fair Value Measurement [Member] | Interest Rate Swap [Member]
Assets
Derivative asset, noncurrent	3,784		2,370
Estimate of Fair Value Measurement [Member] | Interest Rate Cap [Member]
Assets
Derivative asset, noncurrent	1,335		489
Estimate of Fair Value Measurement [Member] | Currency Swap [Member]
Assets
Derivative asset, noncurrent	$ 2,449		$ 0

Segment Information Narrative (

Segment Information Narrative (Details)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Number of reportable segments	4
Concentration risk, supplier	We currently buy a majority of our integrated circuit board assemblies from three suppliers. Management believes that other suppliers could provide similar products, but a change in suppliers, disputes with our suppliers, or unexpected constraints on the suppliers' production capacity could adversely affect operating results.

Information By Segment (Details

Information By Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenues	$ 595,962	$ 486,747	$ 1,789,073	$ 1,467,421
Gross profit	197,097	165,755	553,529	501,669
Operating income (loss)	41,676	38,226	(78,209)	106,681
Total other income (expense)	(16,174)	(4,732)	(45,193)	(16,559)
Income (loss) before income taxes	25,502	33,494	(123,402)	90,122
Electricity Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	236,842	240,142	739,825	729,225
Gross profit	74,549	76,492	221,511	222,387
Operating income (loss)	25,853	17,317	52,082	52,240
Gas Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	156,747	131,780	431,518	394,691
Gross profit	55,812	46,529	139,826	147,880
Operating income (loss)	31,279	20,469	18,176	59,177
Water Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	112,584	114,825	368,415	343,505
Gross profit	35,139	42,734	110,779	131,402
Operating income (loss)	6,859	15,032	3,973	40,702
Networks Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	89,789	0	249,315	0
Gross profit	31,597	0	81,413	0
Operating income (loss)	(15,624)	0	(119,353)	0
Corporate Unallocated [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	(6,691)	(14,592)	(33,087)	(45,438)
Product [Member]
Segment Reporting Information [Line Items]
Revenues	525,716	433,984	1,578,740	1,321,062
Product [Member] | Electricity Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	198,026	199,784	624,139	620,958
Product [Member] | Gas Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	148,660	124,556	408,300	372,555
Product [Member] | Water Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	106,653	109,644	350,814	327,549
Product [Member] | Networks Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	72,377	0	195,487	0
Service [Member]
Segment Reporting Information [Line Items]
Revenues	70,246	52,763	210,333	146,359
Service [Member] | Electricity Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	38,816	40,358	115,686	108,267
Service [Member] | Gas Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	8,087	7,224	23,218	22,136
Service [Member] | Water Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	5,931	5,181	17,601	15,956
Service [Member] | Networks Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	$ 17,412	$ 0	$ 53,828	$ 0

Segment Information Revenues By

Segment Information Revenues By Region (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues from External Customers [Line Items]
Revenues		$ 595,962	$ 486,747	$ 1,789,073	$ 1,467,421
United States and Canada [Member]
Revenues from External Customers [Line Items]
Revenues		376,676	259,796	1,080,709	824,630
Europe, Middle East, and Africa [Member]
Revenues from External Customers [Line Items]
Revenues		177,356	171,924	564,178	493,505
Other [Member]
Revenues from External Customers [Line Items]
Revenues	[1]	$ 41,930	$ 55,027	$ 144,186	$ 149,286
[1]	The Other region includes our operations in Latin America and Asia Pacific.

Depreciation and Amortization,

Depreciation and Amortization, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 30,449	$ 16,532	$ 92,428	$ 46,000
Electricity Operating Segment [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	6,008	6,687	18,952	17,772
Gas Operating Segment [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	4,363	5,084	12,819	13,831
Water Operating Segment [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	3,824	3,860	11,941	11,706
Networks Operating Segment [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	15,214	0	45,449	0
Corporate Unallocated [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 1,040	$ 901	$ 3,267	$ 2,691

Revenue Recognition Revenue Con

Revenue Recognition Revenue Contract Assets and Liabilities Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Revenue Recognition and Deferred Revenue [Abstract]
Beginning balance, January 1		$ 59,808
Changes due to business combination		36,936
Revenues recognized from beginning contract liability		(31,688)
Increases due to amounts collected or due		200,428
Revenues recognized from current period increases	$ 1,600	(142,439)
Other		(847)
Ending balance, September 30	$ 122,198	$ 122,198

Revenue Recognition Narrative (

Revenue Recognition Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Revenue Recognition and Deferred Revenue [Abstract]
Contract with customer, asset, gross	$ 15,700	$ 15,700	$ 11,300
Contract with customer, liability	137,900	137,900	71,100
Contract with customer, revenue recognized	1,600	(142,439)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings (accumulated deficit)	(449,273)	(449,273)	$ (337,873)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred revenue	23,000	23,000
Deferred revenue, current	11,000	11,000
Retained earnings (accumulated deficit)	$ (18,000)	$ (18,000)

Revenue Recognition Remaing Per

Revenue Recognition Remaing Performance Obligation (Details) $ in Millions	Sep. 30, 2018USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 1,100
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 706

Business Combinations Narrative

Business Combinations Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2018	Jan. 05, 2018
Business Acquisition [Line Items]
Payments to acquire businesses, gross			$ 802,500
Goodwill acquired		$ 570,790
SIlver Spring Networks, Inc. [Member]
Business Acquisition [Line Items]
Purchase price, net of cash				$ 809,215
Cash acquired from acquisition			$ 97,800
Equity interest issued				$ 6,700
Goodwill acquired		570,790
Business acquisition, transaction costs		15,600
Integration costs	$ 9,400	$ 68,300

Business Combinations Purchase

Business Combinations Purchase Price Allocation (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2018	Jan. 05, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Acquired intangible assets, weighted average useful life		8 years
Goodwill acquired		$ 570,790
Customer contract and relationships		(23,900)		$ 0
SIlver Spring Networks, Inc. [Member]
Business Acquisition [Line Items]
Current Assets			$ 86,444
Property, plant, and equipment			27,670
Other long-term assets	[1]		(290)
Identifiable intangible assets			226,700
Total identified intangible assets			241,100
Goodwill acquired		$ 570,790
Current liabilities			(90,034)
Long-term liabilities			(2,565)
Total net assets acquired			809,215
Core Developed Technology [Member]
Business Acquisition [Line Items]
Identifiable intangible assets			81,900
Acquired intangible assets, weighted average useful life		5 years
Customer Contracts And Relationships [Member]
Business Acquisition [Line Items]
Identifiable intangible assets			134,000
Acquired intangible assets, weighted average useful life		10 years
Customer contract and relationships			(23,900)
Acquired finite-lived intangible liabilities, weighted average useful life		5 years
Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Identifiable intangible assets			10,800
Acquired intangible assets, weighted average useful life		3 years
In Process Research and Development [Member]
Business Acquisition [Line Items]
Identifiable intangible assets			$ 14,400
[1]	Reflects adjustments to deferred tax assets and liabilities, net as a result of the acquisition, and is classified as part of our overall consolidated deferred tax asset. This unfavorable deferred tax asset more than offsets the fair value of other noncurrent assets acquired.

Business Combinations Revenue a

Business Combinations Revenue and Earnings Attributed to Business Combination (Details) - SIlver Spring Networks, Inc. [Member] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Business Acquisition [Line Items]
Revenues	$ 89,789	$ 249,315
Net loss	$ (10,738)	$ (54,411)

Business Combinations Pro Forma

Business Combinations Pro Forma Information (Details) - SIlver Spring Networks, Inc. [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Revenues	$ 595,962	$ 534,315	$ 1,789,073	$ 1,826,824
Net income (loss)	$ 19,882	$ 5,462	$ (108,427)	$ (1,532)