Itron (ITRI) 10-Q 7 Aug 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	6 Months Ended
	Jun. 30, 2018	Jul. 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
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Amendment Flag	false
Trading Symbol	ITRI
Entity Common Stock, Shares Outstanding		39,299,394

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Product revenues	$ 515,914	$ 454,713	$ 1,053,024	$ 887,078
Service revenues	69,976	48,369	140,087	93,596
Revenues	585,890	503,082	1,193,111	980,674
Cost of revenues
Product cost of revenues	366,542	293,433	749,392	580,526
Service cost of revenues	42,771	31,372	87,287	64,234
Cost of revenues	409,313	324,805	836,679	644,760
Gross profit	176,577	178,277	356,432	335,914
Operating expenses
Sales and marketing	45,448	44,514	97,369	85,769
Product development	54,775	43,024	115,059	83,791
General and administrative	43,415	43,098	145,908	80,285
Amortization of intangible assets	17,999	4,970	35,739	9,519
Restructuring	(5,623)	5,043	82,242	8,095
Total operating expenses	156,014	140,649	476,317	267,459
Operating income (loss)	20,563	37,628	(119,885)	68,455
Other income (expense)
Interest income	633	470	1,294	739
Interest expense	(14,645)	(3,411)	(30,149)	(6,610)
Other income (expense), net	1,003	(3,120)	(164)	(5,956)
Total other income (expense)	(13,009)	(6,061)	(29,019)	(11,827)
Income (loss) before income taxes	7,554	31,567	(148,904)	56,628
Income tax benefit (provision)	(3,781)	(16,560)	7,407	(25,607)
Net income (loss)	3,773	15,007	(141,497)	31,021
Net income attributable to noncontrolling interests	1,116	910	1,512	1,079
Net income (loss) attributable to Itron, Inc.	$ 2,657	$ 14,097	$ (143,009)	$ 29,942
Earnings (loss) per common share - Basic (in dollars per share)	$ 0.07	$ 0.36	$ (3.66)	$ 0.78
Earnings (loss) per common share - Diluted (in dollars per share)	$ 0.07	$ 0.36	$ (3.66)	$ 0.76
Weighted average common shares outstanding - Basic (in shares)	39,243	38,683	39,095	38,579
Weighted average common shares outstanding - Diluted (in shares)	39,789	39,332	39,095	39,274

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 3,773	$ 15,007	$ (141,497)	$ 31,021
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(34,160)	20,447	(17,860)	35,463
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	486	(231)	1,655	61
Pension benefit obligation adjustment	401	193	815	594
Total other comprehensive income (loss), net of tax	(33,273)	20,409	(15,390)	36,118
Total comprehensive income (loss), net of tax	(29,500)	35,416	(156,887)	67,139
Comprehensive income attributable to noncontrolling interests, net of tax	1,116	910	1,512	1,079
Comprehensive income (loss) attributable to Itron, Inc.	$ (30,616)	$ 34,506	$ (158,399)	$ 66,060

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 162,882	$ 176,274
Accounts receivable, net	443,394	398,029
Inventories	195,056	193,835
Other current assets	95,418	81,604
Total current assets	896,750	849,742
Property, plant, and equipment, net	223,435	200,768
Deferred tax assets, net	58,305	49,971
Restricted cash	2,109	311,010
Other long-term assets	46,787	43,666
Intangible assets, net	296,778	95,228
Goodwill	1,119,409	555,762
Total assets	2,643,573	2,106,147
Current liabilities
Accounts payable	249,013	262,166
Other current liabilities	84,647	56,736
Wages and benefits payable	99,822	90,505
Taxes payable	17,713	16,100
Current portion of debt	20,313	19,688
Current portion of warranty	29,443	21,150
Unearned revenue	94,546	41,438
Total current liabilities	595,497	507,783
Long-term debt	1,098,567	593,572
Long-term warranty	14,276	13,712
Pension benefit obligation	94,386	95,717
Deferred tax liabilities, net	1,455	1,525
Other long-term obligations	156,406	88,206
Total liabilities	1,960,587	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, 39,279 and 38,771 shares issued and outstanding	1,317,781	1,294,767
Accumulated other comprehensive loss, net	(185,868)	(170,478)
Accumulated deficit	(469,155)	(337,873)
Total Itron, Inc. shareholders' equity	662,758	786,416
Noncontrolling interests	20,228	19,216
Total equity	682,986	805,632
Total liabilities and equity	$ 2,643,573	$ 2,106,147

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 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)	39,279,000	38,771,000
Common stock, shares outstanding (in shares)	39,279,000	38,771,000
Preferred stock, no par value (in dollars per share)
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	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities
Net income (loss)	$ (141,497)	$ 31,021
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	61,979	29,468
Stock-based compensation	16,619	10,135
Amortization of prepaid debt fees	4,602	533
Deferred taxes, net	(15,319)	7,077
Restructuring, non-cash	624	80
Other adjustments, net	1,205	2,395
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	12,804	(2,032)
Inventories	3,385	(29,470)
Other current assets	(1,921)	(3,905)
Other long-term assets	4,514	2,186
Accounts payable, other current liabilities, and taxes payable	(16,994)	36,861
Wages and benefits payable	762	12,299
Unearned revenue	31,156	6,701
Warranty	3,756	(4,825)
Other operating, net	51,204	(5,080)
Net cash provided by operating activities	16,879	93,444
Investing activities
Acquisitions of property, plant, and equipment	(29,309)	(21,898)
Business acquisitions, net of cash equivalents acquired	(802,488)	(99,477)
Other investing, net	(543)	(456)
Net cash used in investing activities	(832,340)	(121,831)
Financing activities
Proceeds from borrowings	611,938	35,000
Payments on debt	(92,234)	(20,625)
Issuance of common stock	4,927	2,198
Prepaid debt fees	(24,042)	0
Other financing, net	(2,580)	952
Net cash provided by financing activities	498,009	17,525
Effect of foreign exchange rate changes on cash, cash equivalents, and restricted cash	(4,841)	5,177
Decrease in cash, cash equivalents, and restricted cash	(322,293)	(5,685)
Cash, cash equivalents, and restricted cash at beginning of period	487,335	133,565
Cash, cash equivalents, and restricted cash at end of period	165,042	127,880
Supplemental disclosure of cash flow information:
Income taxes, net	3,426	14,480
Interest	$ 15,383	$ 5,021

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 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 six months ended June 30, 2018 and 2017 , the Consolidated Balance Sheets as of June 30, 2018 and December 31, 2017 , and the Consolidated Statements of Cash Flows for the six months ended June 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 six months ended June 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 six months ended June 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: Six Months Ended June 30, 2018 2017 (in thousands) Cash and cash equivalents $ 162,882 $ 127,880 Current restricted cash included in other current assets 51 — Long-term restricted cash 2,109 — Total cash, cash equivalents, and restricted cash $ 165,042 $ 127,880 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 expense as incurred. Otherwise, such incremental costs are capitalized and amortized over the contract period. Capitalized incremental costs are not material. 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 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 a 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.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands, except per share data) Net income (loss) available to common shareholders $ 2,657 $ 14,097 $ (143,009 ) $ 29,942 Weighted average common shares outstanding - Basic 39,243 38,683 39,095 38,579 Dilutive effect of stock-based awards 546 649 — 695 Weighted average common shares outstanding - Diluted 39,789 39,332 39,095 39,274 Earnings (loss) per common share - Basic $ 0.07 $ 0.36 $ (3.66 ) $ 0.78 Earnings (loss) per common share - Diluted $ 0.07 $ 0.36 $ (3.66 ) $ 0.76 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 0.7 million and 1.1 million stock-based awards were excluded from the calculation of diluted EPS for the three and six months ended June 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 six months ended June 30, 2017 because they were anti-dilutive. These stock-based awards could be dilutive in future periods.

Certain Balance Sheet Component

Certain Balance Sheet Components	6 Months Ended
	Jun. 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 June 30, 2018 December 31, 2017 (in thousands) Trade receivables (net of allowance of $4,552 and $3,957) $ 412,848 $ 369,047 Unbilled receivables 30,546 28,982 Total accounts receivable, net $ 443,394 $ 398,029 Allowance for doubtful accounts activity Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Beginning balance $ 4,774 $ 3,424 $ 3,957 $ 3,320 Provision for doubtful accounts, net 334 441 1,254 744 Accounts written-off (247 ) (475 ) (505 ) (805 ) Effect of change in exchange rates (309 ) 112 (154 ) 243 Ending balance $ 4,552 $ 3,502 $ 4,552 $ 3,502 Inventories June 30, 2018 December 31, 2017 (in thousands) Materials $ 125,917 $ 126,656 Work in process 8,953 9,863 Finished goods 60,186 57,316 Total inventories $ 195,056 $ 193,835 Property, plant, and equipment, net June 30, 2018 December 31, 2017 (in thousands) Machinery and equipment $ 310,855 $ 310,753 Computers and software 110,758 104,384 Buildings, furniture, and improvements 145,893 135,566 Land 15,457 18,433 Construction in progress, including purchased equipment 45,370 39,946 Total cost 628,333 609,082 Accumulated depreciation (404,898 ) (408,314 ) Property, plant, and equipment, net $ 223,435 $ 200,768 Depreciation expense Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Depreciation expense $ 12,908 $ 10,120 $ 26,240 $ 19,949

Intangible Assets and Liabiliti

Intangible Assets and Liabilities	6 Months Ended
	Jun. 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: June 30, 2018 December 31, 2017 Gross Accumulated (Amortization) Accretion Net Gross Accumulated Net (in thousands) Intangible Assets Core-developed technology $ 509,896 $ (413,007 ) $ 96,889 $ 429,548 $ (399,969 ) $ 29,579 Customer contracts and relationships 384,041 (203,890 ) 180,151 258,586 (197,582 ) 61,004 Trademarks and trade names 79,569 (67,709 ) 11,860 70,056 (66,004 ) 4,052 Other 12,601 (11,123 ) 1,478 11,661 (11,068 ) 593 Total intangible assets subject to amortization $ 986,107 $ (695,729 ) $ 290,378 $ 769,851 $ (674,623 ) $ 95,228 In-process research and development 6,400 — 6,400 — — — Total intangible assets $ 992,507 $ (695,729 ) $ 296,778 $ 769,851 $ (674,623 ) $ 95,228 Intangible Liabilities Customer contracts and relationships $ (23,900 ) $ 2,609 $ (21,291 ) $ — $ — $ — A summary of intangible assets and liabilities activity is as follows: Six Months Ended June 30, 2018 2017 (in thousands) Beginning balance, intangible assets, gross $ 769,851 $ 669,896 Intangible assets acquired 241,539 36,500 Effect of change in exchange rates (18,883 ) 40,818 Ending balance, intangible assets, gross $ 992,507 $ 747,214 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, $8.0 million were completed during the first half of 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 June 30, 2018) $ 38,786 $ (2,609 ) $ 36,177 2019 72,012 (8,233 ) 63,779 2020 52,076 (8,028 ) 44,048 2021 36,469 (1,963 ) 34,506 2022 26,282 (458 ) 25,824 Beyond 2022 64,753 — 64,753 Total intangible assets subject to amortization (accretion) $ 290,378 $ (21,291 ) $ 269,087 We have recognized $18.0 million and $5.0 million of net amortization of intangible assets for the three months ended June 30, 2018 and 2017 , respectively, and $35.7 million and $9.5 million for the six months ended June 30, 2018 and 2017 , respectively within operating expenses in the Consolidated Statement of Operations. These expenses relate to intangible assets and liabilities acquired as part of a business combination.

Goodwill

Goodwill	6 Months Ended
	Jun. 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 — — — 572,870 572,870 Effect of change in exchange rates (706 ) (6,669 ) (1,605 ) (243 ) (9,223 ) Goodwill balance at June 30, 2018 Goodwill before impairment 492,367 346,034 370,031 572,627 1,781,059 Accumulated impairment losses (378,832 ) — (282,818 ) — (661,650 ) Goodwill, net $ 113,535 $ 346,034 $ 87,213 $ 572,627 $ 1,119,409

Debt

Debt	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Debt	Debt The components of our borrowings were as follows: June 30, 2018 December 31, 2017 (in thousands) Credit facility: USD denominated term loan $ 645,938 $ 194,063 Multicurrency revolving line of credit 96,000 125,414 Senior notes 400,000 300,000 Total debt 1,141,938 619,477 Less: current portion of debt 20,313 19,688 Less: unamortized prepaid debt fees - term loan 5,559 629 Less: unamortized prepaid debt fees - senior notes 17,499 5,588 Long-term debt $ 1,098,567 $ 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 June 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 June 30, 2018 , the interest rate for both the term loan and revolver was 4.10% , 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 January 15, 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 June 30, 2018) $ 8,125 2019 28,438 2020 44,777 2021 60,938 2022 65,000 2023 534,660 Total minimum payments on debt $ 741,938

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 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 June 30, 2018 December 31, 2017 Derivatives designated as hedging instruments under Subtopic 815-20 (in thousands) Interest rate swap contract Other current assets $ 1,710 $ 658 Interest rate cap contracts Other current assets 396 17 Cross currency swap contract Other current assets 1,523 — Interest rate swap contract Other long-term assets 2,086 1,712 Interest rate cap contracts Other long-term assets 839 179 Cross currency swap contract Other long-term assets 652 — Derivatives not designated as hedging instruments under Subtopic 815-20 Foreign exchange forward contracts Other current assets 195 41 Interest rate cap contracts Other current assets — 25 Interest rate cap contracts Other long-term assets — 268 Total asset derivatives $ 7,401 $ 2,900 Derivative Liabilities Derivatives not designated as hedging instruments under Subtopic 815-20 Foreign exchange forward contracts Other current liabilities $ 276 $ 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 4,078 (330 ) Realized loss (gain) reclassified into net income (2,423 ) 391 Net unrealized gain (loss) on hedging instruments at June 30, $ (11,759 ) $ (14,276 ) Reclassification of amounts related to hedging instruments are included in interest expense in the Consolidated Statements of Operations for the periods ended June 30, 2018 and 2017 . Included in the net unrealized loss on hedging instruments at June 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) June 30, 2018 $ 7,401 $ (276 ) $ — $ 7,125 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) June 30, 2018 $ 276 $ (276 ) $ — $ — 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 June 30, 2018 and December 31, 2017 . No derivative asset or liability balance with any of our counterparties was individually significant at June 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 June 30, 2018 , our LIBOR-based debt balance was $742.0 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 $1.7 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 $1.5 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 June 30, Interest rate swap contract $ 513 $ (517 ) Interest expense $ 246 $ (210 ) Interest rate cap contracts 181 (117 ) Interest expense (466 ) (50 ) Cross currency swap contract 2,376 — Interest expense 207 — Cross currency swap contract — — Other income/(expense), net 2,368 — Six Months Ended June 30, Interest rate swap contract $ 1,760 $ (336 ) Interest expense $ 335 $ (545 ) Interest rate cap contracts 369 (201 ) Interest expense (536 ) (93 ) Cross currency swap contract 2,376 — Interest expense 207 — Cross currency swap contract — — Other income/(expense), net 2,368 — 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 six months ended June 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 June 30, 2018 , a total of 57 contracts were offsetting our exposures from the euro, pound sterling, Indian Rupee, Chinese Yuan, Canadian Dollar, Mexican Peso and various other currencies , with notional amounts ranging from $133,000 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 June 30, (in thousands) Foreign exchange forward contracts Other income (expense), net $ 3,636 $ (2,063 ) Interest rate cap contracts Interest expense 95 (175 ) Six Months Ended June 30, Foreign exchange forward contracts Other income (expense), net $ 2,113 $ (3,805 ) Interest rate cap contracts Interest expense 377 (301 )

Defined Benefit Pension Plans

Defined Benefit Pension Plans	6 Months Ended
	Jun. 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: June 30, 2018 December 31, 2017 (in thousands) Assets Plan assets in other long-term assets $ 938 $ 991 Liabilities Current portion of pension benefit obligation in wages and benefits payable 3,123 3,260 Long-term portion of pension benefit obligation 94,386 95,717 Pension benefit obligation, net $ 96,571 $ 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Service cost $ 968 $ 924 $ 2,017 $ 1,852 Interest cost 591 535 1,200 1,060 Expected return on plan assets (169 ) (147 ) (350 ) (293 ) Amortization of actuarial net loss 392 403 795 794 Amortization of unrecognized prior service costs 17 15 34 30 Net periodic benefit cost $ 1,799 $ 1,730 $ 3,696 $ 3,443 The components of net periodic benefit cost, other than the service cost component, are included in total other income (expense) on the Consolidated Statements of Operations.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 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 June 30, 2018 , 6,571,411 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 322,765 shares of common stock were available for future issuance at June 30, 2018 . Unrestricted stock and ESPP activity for the three and six months ended June 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Stock options $ 952 $ 598 $ 1,783 $ 1,257 Restricted stock units 7,365 4,071 14,422 8,368 Unrestricted stock awards 207 255 414 510 Phantom stock units 587 492 1,277 884 Total stock-based compensation $ 9,111 $ 5,416 $ 17,896 $ 11,019 Related tax benefit $ 1,594 $ 1,100 $ 3,128 $ 2,328 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 132 65.80 $ 21.99 Exercised (34 ) 37.58 933 Forfeited (35 ) 47.38 Expired (47 ) 67.43 Outstanding, June 30, 2017 975 $ 47.54 6.7 $ 21,680 Outstanding, January 1, 2018 956 $ 47.10 6.3 $ 21,965 Converted upon acquisition 42 51.86 $ 14.86 Granted 101 69.30 $ 24.83 Exercised (87 ) 40.08 2,779 Forfeited (3 ) 68.43 Expired (66 ) 95.33 Outstanding, June 30, 2018 943 $ 46.92 6.7 $ 14,066 Exercisable June 30, 2018 648 $ 41.97 5.8 $ 12,006 Expected to vest, June 30, 2018 295 $ 57.82 8.7 $ 2,061 At June 30, 2018 , total unrecognized stock-based compensation expense related to nonvested stock options was $4.1 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 Expected volatility — % 30.8 % 30.9 % 32.6 % Risk-free interest rate — % 1.8 % 2.8 % 2.0 % Expected term (years) N/A 5.5 6.1 5.5 There were no employee stock options granted for the three months ended June 30, 2018. 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 140 $ 65.48 Released (328 ) $ 12,533 Forfeited (19 ) Outstanding, June 30, 2017 494 Outstanding, January 1, 2018 556 $ 47.68 Converted upon acquisition 579 69.40 Granted 150 67.61 Released (445 ) 53.01 $ 23,609 Forfeited (79 ) 68.56 Outstanding, June 30, 2018 761 62.85 Vested but not released, June 30, 2018 11 $ 656 Expected to vest, June 30, 2018 699 $ 41,948 At June 30, 2018 , total unrecognized compensation expense on restricted stock units was $48.8 million , which is expected to be recognized over a weighted average period of approximately 2.2 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 Expected volatility — % 28.0 % 28.0 % 28.0 % Risk-free interest rate — % 1.4 % 2.2 % 1.1 % Expected term (years) N/A 2.5 2.1 1.7 Weighted average fair value $ — $ 75.58 $ 78.56 $ 77.65 There were no performance-based restricted stock units granted for the three months ended June 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 (6 ) Outstanding, June 30, 2017 68 Expected to vest, June 30, 2017 68 Outstanding, January 1, 2018 63 $ 51.88 Converted upon acquisition 21 69.40 Granted 32 69.22 Released (32 ) 52.59 Forfeited (3 ) 57.29 Outstanding, June 30, 2018 81 62.76 Expected to vest, June 30, 2018 81 At June 30, 2018 , total unrecognized compensation expense on phantom stock units was $4.1 million which is expected to be recognized over a weighted average period of approximately 2.1 years . As of June 30, 2018 and December 31, 2017 , we have recognized a phantom stock liability of $1.0 million and $1.7 million , respectively, within wages and benefits payable in the Consolidated Balance Sheets.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 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. Additionally, for certain tax jurisdictions where a reliable estimate of annual income tax expense or benefit cannot be made, we applied the actual effective tax rate to quarter-to-date income. Our tax rate for the three and six months ended June 30, 2018 of 50% and 5% , 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 six months ended June 30, 2017 of 52% and 45% 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 six months ended June 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Net interest and penalties expense $ 315 $ 207 $ 739 $ 413 Accrued interest and penalties recognized were as follows: June 30, 2018 December 31, 2017 (in thousands) Accrued interest $ 3,334 $ 2,706 Accrued penalties 2,359 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: June 30, 2018 December 31, 2017 (in thousands) Unrecognized tax benefits related to uncertain tax positions $ 75,385 $ 56,702 The amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate 74,029 55,312 The increase in unrecognized tax benefits at June 30, 2018 related primarily to $16.4 million of unrecognized tax benefits recognized through purchase accounting on January 5, 2018 as a result of the acquisition of SSNI. At June 30, 2018 , we are under examination by certain tax authorities for the 2010 to 2015 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. Based upon the timing and outcome of examinations, litigation, the impact of legislative, regulatory, and judicial developments, and the impact of these items on the statute of limitations, it is reasonably possible that the related unrecognized tax benefits could change from those recognized within the next twelve months. However, at this time, an estimate of the range of reasonably possible adjustments to the balance of unrecognized tax benefits cannot be made.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 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: June 30, 2018 December 31, 2017 (in thousands) Credit facilities Multicurrency revolving line of credit $ 500,000 $ 500,000 Long-term borrowings (96,000 ) (125,414 ) Standby LOCs issued and outstanding (42,278 ) (31,881 ) Net available for additional borrowings under the multi-currency revolving line of credit $ 361,722 $ 342,705 Net available for additional standby LOCs under sub-facility 257,722 218,119 Unsecured multicurrency revolving lines of credit with various financial institutions Multicurrency revolving lines of credit $ 106,277 $ 110,477 Standby LOCs issued and outstanding (21,274 ) (21,030 ) Short-term borrowings (2,268 ) (916 ) Net available for additional borrowings and LOCs $ 82,735 $ 88,531 Unsecured surety bonds in force $ 96,369 $ 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. We generally provide an indemnification related to the infringement of any patent, copyright, trademark, or other intellectual property right on software or equipment within our sales contracts, which indemnifies the customer from and pays the resulting costs, damages, and attorney's fees awarded against a customer with respect to such a claim provided that: 1) the customer promptly notifies us in writing of the claim and 2) we have the sole control of the defense and all related settlement negotiations. We may also provide an indemnification to our customers for third party claims resulting from damages caused by the negligence or willful misconduct of our employees/agents in connection with the performance of certain contracts. The terms of our indemnifications generally do not limit the maximum potential payments. It is not possible to predict the maximum potential amount of future payments under these or similar agreements. Legal Matters We are subject to various legal proceedings and claims of which the outcomes are subject to significant uncertainty. Our policy is to assess the likelihood of any adverse judgments or outcomes related to legal matters, as well as ranges of probable losses. A determination of the amount of the liability required, if any, for these contingencies is made after an analysis of each known issue. A liability is recognized and charged to operating expense when we determine that a loss is probable and the amount can be reasonably estimated. Additionally, we disclose contingencies for which a material loss is reasonably possible, but not probable. Warranty A summary of the warranty accrual account activity is as follows: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Beginning balance $ 41,979 $ 41,536 $ 34,862 $ 43,302 Assumed liabilities from acquisition — — 5,742 — New product warranties 1,464 1,568 2,282 3,929 Other adjustments and expirations 4,437 219 8,481 1,901 Claims activity (2,708 ) (4,248 ) (6,816 ) (10,599 ) Effect of change in exchange rates (1,453 ) 735 (832 ) 1,277 Ending balance 43,719 39,810 43,719 39,810 Less: current portion of warranty 29,443 25,584 29,443 25,584 Long-term warranty $ 14,276 $ 14,226 $ 14,276 $ 14,226 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 was as follows: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Total warranty expense $ 5,901 $ (6,213 ) $ 10,763 $ (2,170 ) Warranty expense increased during the three and six months ended June 30, 2018 compared with the same periods in 2017 primarily due to an insurance recovery in our Water operating segment of $8.0 million recognized during the second quarter of 2017. This recovery is associated with warranty costs previously recognized as a result of our 2015 product replacement notification to customers who had purchased certain communication modules. Health Benefits 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Plan costs $ 7,673 $ 6,742 $ 16,354 $ 15,496 The IBNR accrual, which is included in wages and benefits payable, was as follows: June 30, 2018 December 31, 2017 (in thousands) IBNR accrual $ 3,280 $ 2,664 Our IBNR accrual and expenses may fluctuate due to the number of plan participants, claims activity, and deductible limits. For our employees located outside of the United States, health benefits are provided primarily through governmental social plans, which are funded through employee and employer tax withholdings.

Restructuring

Restructuring	6 Months Ended
	Jun. 30, 2018
Restructuring and Related Activities [Abstract]
Restructuring	Restructuring 2018 Projects On February 22, 2018, our Board of Directors approved a restructuring plan (2018 Projects). The 2018 Projects will include activities that continue our efforts to optimize our global supply chain and manufacturing operations, product 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 June 30, 2018 Costs Recognized During the Six Months Ended Expected Remaining Costs to be Recognized at June 30, 2018 (in thousands) Employee severance costs $ 81,669 $ 81,669 $ — Other restructuring costs 18,418 418 18,000 Total $ 100,087 $ 82,087 $ 18,000 Segments: Electricity $ 20,746 $ 18,746 $ 2,000 Gas 50,558 41,558 9,000 Water 22,692 15,692 7,000 Corporate unallocated 6,091 6,091 — Total $ 100,087 $ 82,087 $ 18,000 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 competiveness. We expect to close or consolidate several facilities and reduce our global workforce as a result of the restructuring. The 2016 Projects began during the three months ended September 30, 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 June 30, 2018 Costs Recognized in Prior Periods Costs Recognized During the Six Months Ended Expected Remaining Costs to be Recognized at June 30, 2018 (in thousands) Employee severance costs $ 37,846 $ 39,855 $ (2,009 ) $ — Asset impairments & net loss on sale or disposal 5,546 4,922 624 — Other restructuring costs 15,975 9,435 1,540 5,000 Total $ 59,367 $ 54,212 $ 155 $ 5,000 Segments: Electricity $ 11,234 $ 9,025 $ 709 $ 1,500 Gas 31,084 29,181 (97 ) 2,000 Water 14,562 13,761 (699 ) 1,500 Corporate unallocated 2,487 2,245 242 — Total $ 59,367 $ 54,212 $ 155 $ 5,000 The following table summarizes the activity within the restructuring related balance sheet accounts for the 2018 and 2016 Projects during the six months ended June 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 79,660 624 1,958 82,242 Cash payments (16,324 ) — (1,996 ) (18,320 ) Net assets disposed and impaired — (624 ) — (624 ) Effect of change in exchange rates (5,049 ) — (3 ) (5,052 ) Ending balance, June 30, 2018 $ 95,941 $ — $ 2,430 $ 98,371 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 $48.8 million and $32.5 million as of June 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 $49.6 million and $7.6 million as of June 30, 2018 and December 31, 2017 . The long-term portion of restructuring liabilities are classified within other long-term obligations on the Consolidated Balance Sheets, and include facility exit costs and severance accruals.

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 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 June 30, 2018 and December 31, 2017 . Stock Repurchase Authorization On February 23, 2017, Itron's Board of Directors authorized the Company to repurchase up to $50 million of our common stock over a 12-month period, beginning February 23, 2017. There were no repurchases of common stock made prior to plan termination on February 23, 2018. 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Before-tax amount Foreign currency translation adjustment $ (34,271 ) $ 20,520 $ (17,978 ) $ 35,586 Net unrealized gain (loss) on derivative instruments designated as cash flow hedges 3,068 (634 ) 4,504 (537 ) Net hedging (gain) loss reclassified into net income (2,354 ) 259 (2,373 ) 637 Net defined benefit plan loss reclassified to net income 409 418 829 824 Total other comprehensive income (loss), before tax (33,148 ) 20,563 (15,018 ) 36,510 Tax (provision) benefit Foreign currency translation adjustment 111 (73 ) 118 (123 ) Net unrealized gain (loss) on derivative instruments designated as cash flow hedges (173 ) 244 (426 ) 207 Net hedging (gain) loss reclassified into net income (55 ) (100 ) (50 ) (246 ) Net defined benefit plan loss reclassified to net income (8 ) (225 ) (14 ) (230 ) Total other comprehensive income (loss) tax benefit (125 ) (154 ) (372 ) (392 ) Net-of-tax amount Foreign currency translation adjustment (34,160 ) 20,447 (17,860 ) 35,463 Net unrealized gain (loss) on derivative instruments designated as cash flow hedges 2,895 (390 ) 4,078 (330 ) Net hedging (gain) loss reclassified into net income (2,409 ) 159 (2,423 ) 391 Net defined benefit plan loss reclassified to net income 401 193 815 594 Total other comprehensive income (loss), net of tax $ (33,273 ) $ 20,409 $ (15,390 ) $ 36,118 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 35,463 (330 ) — — 35,133 Amounts reclassified from AOCI — 391 — 594 985 Total other comprehensive income (loss) 35,463 61 — 594 36,118 Balances at June 30, 2017 $ (147,523 ) $ 104 $ (14,380 ) $ (31,410 ) $ (193,209 ) Balances at January 1, 2018 $ (128,648 ) $ 966 $ (14,380 ) $ (28,416 ) $ (170,478 ) OCI before reclassifications (17,860 ) 4,078 — — (13,782 ) Amounts reclassified from AOCI — (2,423 ) — 815 (1,608 ) Total other comprehensive income (loss) (17,860 ) 1,655 — 815 (15,390 ) Balances at June 30, 2018 $ (146,508 ) $ 2,621 $ (14,380 ) $ (27,601 ) $ (185,868 )

Fair Values of Financial Instru

Fair Values of Financial Instruments	6 Months Ended
	Jun. 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: June 30, 2018 December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value (in thousands) Assets Cash and cash equivalents $ 162,882 $ 162,882 $ 176,274 $ 176,274 Restricted cash 2,160 2,160 311,061 311,061 Foreign exchange forwards 195 195 41 41 Interest rate swaps 3,796 3,796 2,370 2,370 Interest rate caps 1,235 1,235 489 489 Cross currency swaps 2,175 2,175 — — Liabilities Credit facility USD denominated term loan $ 645,938 $ 654,171 $ 194,063 $ 192,295 Multicurrency revolving line of credit 96,000 97,306 125,414 124,100 Senior notes 400,000 380,000 300,000 301,125 Foreign exchange forwards 276 276 289 289 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 June 30, 2018 and December 31, 2017 do not reflect subsequent changes in the economy, interest rates, tax rates, and other variables that may affect the determination of fair value.

Segment Information

Segment Information	6 Months Ended
	Jun. 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 product development requirements, and focus on its strategic investments. Our sales and marketing function is managed under each operating segment. Our product 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Product revenues Electricity $ 212,236 $ 215,271 $ 426,113 $ 421,174 Gas 129,397 130,872 259,640 247,999 Water 118,574 108,570 244,161 217,905 Networks 55,707 — 123,110 — Total Company $ 515,914 $ 454,713 $ 1,053,024 $ 887,078 Service revenues Electricity $ 38,342 $ 35,061 $ 76,870 $ 67,909 Gas 7,635 7,828 15,131 14,912 Water 6,063 5,480 11,670 10,775 Networks 17,936 — 36,416 — Total Company $ 69,976 $ 48,369 $ 140,087 $ 93,596 Total revenues Electricity $ 250,578 $ 250,332 $ 502,983 $ 489,083 Gas 137,032 138,700 274,771 262,911 Water 124,637 114,050 255,831 228,680 Networks 73,643 — 159,526 — Total Company $ 585,890 $ 503,082 $ 1,193,111 $ 980,674 Gross profit Electricity $ 76,987 $ 78,645 $ 146,962 $ 145,895 Gas 40,543 50,536 84,014 101,351 Water 37,835 49,096 75,640 88,668 Networks 21,212 — 49,816 — Total Company $ 176,577 $ 178,277 $ 356,432 $ 335,914 Operating income (loss) Electricity $ 28,997 $ 17,839 $ 26,229 $ 34,923 Gas 15,245 16,977 (13,103 ) 38,708 Water 8,824 16,866 (2,886 ) 25,670 Networks (28,219 ) — (103,729 ) — Corporate unallocated (4,284 ) (14,054 ) (26,396 ) (30,846 ) Total Company 20,563 37,628 (119,885 ) 68,455 Total other income (expense) (13,009 ) (6,061 ) (29,019 ) (11,827 ) Income (loss) before income taxes $ 7,554 $ 31,567 $ (148,904 ) $ 56,628 For the three and six months ended June 30, 2018 , one customer represented 23% and 22% , respectively, of total Electricity operating segment revenues, and another customer represented 16% for the same three and six months periods. For both the three and six months ended June 30, 2018 , one customer represented 12% of total Gas operating segment revenues. For the three and six ended June 30, 2018 , no single customer represented more than 10% of the Water operating segment revenues. For the three and six months ended June 30, 2018 , one customer represented 18% and 13% , respectively, and another customer represented 15% and 13% , respectively, of total Networks operating segment revenues. For the three months ended June 30, 2018 , one customer represented 10% of total company revenues, and no single customer represented more than 10% of total company revenues for the six months ended June 30, 2018 . For the three and six months ended June 30, 2017 , one customer represented 22% and 20% , respectively, of total Electricity operating segment revenues. For the three months ended June 30, 2017, one customer represented 11% of total company revenues. For the six months ended June 30, 2017, no single customer represented more than 10% of total company revenues. For the three and six months ended June 30, 2017 , no single customer represented more than 10% of the Gas or Water operating segment 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) United States and Canada $ 348,101 $ 295,737 $ 704,033 $ 564,834 Europe, Middle East, and Africa 184,748 158,766 386,822 321,581 Other (1) 53,041 48,579 102,256 94,259 Total revenues $ 585,890 $ 503,082 $ 1,193,111 $ 980,674 (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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Electricity $ 6,419 $ 5,774 $ 12,944 $ 11,085 Gas 4,254 4,503 8,456 8,747 Water 4,008 3,887 8,117 7,846 Networks 15,223 — 30,235 — Corporate unallocated 1,003 926 2,227 1,790 Total Company $ 30,907 $ 15,090 $ 61,979 $ 29,468

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 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 38,816 Revenues recognized from beginning contract liability (30,045 ) Increases due to amounts collected or due 137,882 Revenues recognized from current period increases (75,618 ) Other (2,687 ) Ending balance, June 30 $ 128,156 On January 1, 2018, total contract assets were $11.3 million and total contract liabilities were $71.1 million . On June 30, 2018, total contract assets were $14.3 million and total contract liabilities were $142.4 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 June 30, 2018, revenue recognized of $2.8 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 $1.2 billion for the next twelve months and approximately $692 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 product categories of products, which includes 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 June 30, 2018 were total deferred revenue would have been higher by approximately $21 million , of which, approximately $9 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 $15 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 six months ended June 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 six months ended June 30, 2018 .

Business Combinations

Business Combinations	6 Months Ended
	Jun. 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 $ 86,783 Property, plant, and equipment 27,670 Other long-term assets (1) (1,578 ) Identifiable intangible assets Core-developed technology 81,900 5 Customer contract and relationships 133,500 10 Trademark and trade names 10,800 3 Total identified intangible assets subject to amortization 226,200 8 In-process research and development (IPR&D) 14,400 Total identified intangible assets 240,600 Goodwill 572,870 Current liabilities (91,301 ) Customer contract and relationships (23,900 ) 5 Long-term liabilities (1,928 ) Total net assets acquired $ 809,216 (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 product 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 $572.9 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 six months ended June 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 six months ended June 30, 2018, we recognized $ 12.1 million and $58.9 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: April 1, 2018 - June 30, 2018 January 5, 2018 - June 30, 2018 Revenues $ 73,643 $ 159,526 Net loss (13,919 ) (43,672 ) 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 ( in thousands) Revenues $ 585,890 $ 764,654 $ 1,193,111 $ 1,292,509 Net income (loss) 2,657 20,240 (128,309 ) (6,994 ) 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. Comverge On June 1, 2017, we completed the acquisition of Comverge by purchasing the stock of its parent, Peak Holding Corp. (Comverge). This was financed through borrowings on our multicurrency revolving line of credit and cash on hand. Comverge is a leading provider of integrated demand response and customer engagement solutions that enable electric utilities to ensure grid reliability, lower energy costs for consumers, meet regulatory demands, and enhance the customer experience. Comverge's technologies are complementary to our Electricity operating segment's growing software and services offerings, and will help optimize grid performance and reliability. The purchase price of Comverge was $100.0 million in cash, net of $18.2 million of cash and cash equivalents acquired. We allocated the purchase price to the assets acquired and liabilities assumed based on fair value assessments. The fair values of these assets and liabilities were considered final as of December 31, 2017. The following supplemental pro forma results are based on the individual historical results of Itron and Comverge, with adjustments to give effect to the combined operations as if the acquisition had been consummated on January 1, 2016. Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 ( in thousands) Revenues $ 585,890 $ 511,024 $ 1,193,111 $ 1,002,786 Net income (loss) 2,657 18,954 (143,009 ) 34,061 The significant nonrecurring adjustments reflected in the proforma schedule above are not considered material and include the following: • Elimination of transaction costs incurred by Comverge 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, 2016 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 Accoun24

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 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: Six Months Ended June 30, 2018 2017 (in thousands) Cash and cash equivalents $ 162,882 $ 127,880 Current restricted cash included in other current assets 51 — Long-term restricted cash 2,109 — Total cash, cash equivalents, and restricted cash $ 165,042 $ 127,880
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 expense as incurred. Otherwise, such incremental costs are capitalized and amortized over the contract period. Capitalized incremental costs are not material.
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 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 a 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.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands, except per share data) Net income (loss) available to common shareholders $ 2,657 $ 14,097 $ (143,009 ) $ 29,942 Weighted average common shares outstanding - Basic 39,243 38,683 39,095 38,579 Dilutive effect of stock-based awards 546 649 — 695 Weighted average common shares outstanding - Diluted 39,789 39,332 39,095 39,274 Earnings (loss) per common share - Basic $ 0.07 $ 0.36 $ (3.66 ) $ 0.78 Earnings (loss) per common share - Diluted $ 0.07 $ 0.36 $ (3.66 ) $ 0.76

Certain Balance Sheet Compone26

Certain Balance Sheet Components (Tables)	6 Months Ended
	Jun. 30, 2018
Balance Sheet Related Disclosures [Abstract]
Accounts Receivable, Net	Accounts receivable, net June 30, 2018 December 31, 2017 (in thousands) Trade receivables (net of allowance of $4,552 and $3,957) $ 412,848 $ 369,047 Unbilled receivables 30,546 28,982 Total accounts receivable, net $ 443,394 $ 398,029
Allowance for Credit Losses on Financing Receivables	Allowance for doubtful accounts activity Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Beginning balance $ 4,774 $ 3,424 $ 3,957 $ 3,320 Provision for doubtful accounts, net 334 441 1,254 744 Accounts written-off (247 ) (475 ) (505 ) (805 ) Effect of change in exchange rates (309 ) 112 (154 ) 243 Ending balance $ 4,552 $ 3,502 $ 4,552 $ 3,502
Inventories	Inventories June 30, 2018 December 31, 2017 (in thousands) Materials $ 125,917 $ 126,656 Work in process 8,953 9,863 Finished goods 60,186 57,316 Total inventories $ 195,056 $ 193,835
Property, Plant, and Equipment, Net	Property, plant, and equipment, net June 30, 2018 December 31, 2017 (in thousands) Machinery and equipment $ 310,855 $ 310,753 Computers and software 110,758 104,384 Buildings, furniture, and improvements 145,893 135,566 Land 15,457 18,433 Construction in progress, including purchased equipment 45,370 39,946 Total cost 628,333 609,082 Accumulated depreciation (404,898 ) (408,314 ) Property, plant, and equipment, net $ 223,435 $ 200,768
Depreciation Expense	Depreciation expense Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Depreciation expense $ 12,908 $ 10,120 $ 26,240 $ 19,949

Intangible Assets and Liabili27

Intangible Assets and Liabilities (Tables)	6 Months Ended
	Jun. 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: June 30, 2018 December 31, 2017 Gross Accumulated (Amortization) Accretion Net Gross Accumulated Net (in thousands) Intangible Assets Core-developed technology $ 509,896 $ (413,007 ) $ 96,889 $ 429,548 $ (399,969 ) $ 29,579 Customer contracts and relationships 384,041 (203,890 ) 180,151 258,586 (197,582 ) 61,004 Trademarks and trade names 79,569 (67,709 ) 11,860 70,056 (66,004 ) 4,052 Other 12,601 (11,123 ) 1,478 11,661 (11,068 ) 593 Total intangible assets subject to amortization $ 986,107 $ (695,729 ) $ 290,378 $ 769,851 $ (674,623 ) $ 95,228 In-process research and development 6,400 — 6,400 — — — Total intangible assets $ 992,507 $ (695,729 ) $ 296,778 $ 769,851 $ (674,623 ) $ 95,228 Intangible Liabilities Customer contracts and relationships $ (23,900 ) $ 2,609 $ (21,291 ) $ — $ — $ —
Summary of Intangible Asset Account Activity	A summary of intangible assets and liabilities activity is as follows: Six Months Ended June 30, 2018 2017 (in thousands) Beginning balance, intangible assets, gross $ 769,851 $ 669,896 Intangible assets acquired 241,539 36,500 Effect of change in exchange rates (18,883 ) 40,818 Ending balance, intangible assets, gross $ 992,507 $ 747,214 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 June 30, 2018) $ 38,786 $ (2,609 ) $ 36,177 2019 72,012 (8,233 ) 63,779 2020 52,076 (8,028 ) 44,048 2021 36,469 (1,963 ) 34,506 2022 26,282 (458 ) 25,824 Beyond 2022 64,753 — 64,753 Total intangible assets subject to amortization (accretion) $ 290,378 $ (21,291 ) $ 269,087

Goodwill (Tables)

Goodwill (Tables)	6 Months Ended
	Jun. 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 — — — 572,870 572,870 Effect of change in exchange rates (706 ) (6,669 ) (1,605 ) (243 ) (9,223 ) Goodwill balance at June 30, 2018 Goodwill before impairment 492,367 346,034 370,031 572,627 1,781,059 Accumulated impairment losses (378,832 ) — (282,818 ) — (661,650 ) Goodwill, net $ 113,535 $ 346,034 $ 87,213 $ 572,627 $ 1,119,409

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Schedule of Debt	The components of our borrowings were as follows: June 30, 2018 December 31, 2017 (in thousands) Credit facility: USD denominated term loan $ 645,938 $ 194,063 Multicurrency revolving line of credit 96,000 125,414 Senior notes 400,000 300,000 Total debt 1,141,938 619,477 Less: current portion of debt 20,313 19,688 Less: unamortized prepaid debt fees - term loan 5,559 629 Less: unamortized prepaid debt fees - senior notes 17,499 5,588 Long-term debt $ 1,098,567 $ 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 June 30, 2018) $ 8,125 2019 28,438 2020 44,777 2021 60,938 2022 65,000 2023 534,660 Total minimum payments on debt $ 741,938

Derivative Financial Instrume30

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 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 June 30, 2018 December 31, 2017 Derivatives designated as hedging instruments under Subtopic 815-20 (in thousands) Interest rate swap contract Other current assets $ 1,710 $ 658 Interest rate cap contracts Other current assets 396 17 Cross currency swap contract Other current assets 1,523 — Interest rate swap contract Other long-term assets 2,086 1,712 Interest rate cap contracts Other long-term assets 839 179 Cross currency swap contract Other long-term assets 652 — Derivatives not designated as hedging instruments under Subtopic 815-20 Foreign exchange forward contracts Other current assets 195 41 Interest rate cap contracts Other current assets — 25 Interest rate cap contracts Other long-term assets — 268 Total asset derivatives $ 7,401 $ 2,900 Derivative Liabilities Derivatives not designated as hedging instruments under Subtopic 815-20 Foreign exchange forward contracts Other current liabilities $ 276 $ 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 4,078 (330 ) Realized loss (gain) reclassified into net income (2,423 ) 391 Net unrealized gain (loss) on hedging instruments at June 30, $ (11,759 ) $ (14,276 )
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) June 30, 2018 $ 7,401 $ (276 ) $ — $ 7,125 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) June 30, 2018 $ 276 $ (276 ) $ — $ — 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 June 30, Interest rate swap contract $ 513 $ (517 ) Interest expense $ 246 $ (210 ) Interest rate cap contracts 181 (117 ) Interest expense (466 ) (50 ) Cross currency swap contract 2,376 — Interest expense 207 — Cross currency swap contract — — Other income/(expense), net 2,368 — Six Months Ended June 30, Interest rate swap contract $ 1,760 $ (336 ) Interest expense $ 335 $ (545 ) Interest rate cap contracts 369 (201 ) Interest expense (536 ) (93 ) Cross currency swap contract 2,376 — Interest expense 207 — Cross currency swap contract — — Other income/(expense), net 2,368 —
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 June 30, (in thousands) Foreign exchange forward contracts Other income (expense), net $ 3,636 $ (2,063 ) Interest rate cap contracts Interest expense 95 (175 ) Six Months Ended June 30, Foreign exchange forward contracts Other income (expense), net $ 2,113 $ (3,805 ) Interest rate cap contracts Interest expense 377 (301 )

Defined Benefit Pension Plans (

Defined Benefit Pension Plans (Tables)	6 Months Ended
	Jun. 30, 2018
Defined Benefit Plan [Abstract]
Schedule of Amounts Recognized in the Consolidated Balance Sheets	Amounts recognized on the Consolidated Balance Sheets consist of: June 30, 2018 December 31, 2017 (in thousands) Assets Plan assets in other long-term assets $ 938 $ 991 Liabilities Current portion of pension benefit obligation in wages and benefits payable 3,123 3,260 Long-term portion of pension benefit obligation 94,386 95,717 Pension benefit obligation, net $ 96,571 $ 97,986
Schedule of Net Periodic Pension Benefit Costs	Net periodic pension benefit costs for our plans include the following components: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Service cost $ 968 $ 924 $ 2,017 $ 1,852 Interest cost 591 535 1,200 1,060 Expected return on plan assets (169 ) (147 ) (350 ) (293 ) Amortization of actuarial net loss 392 403 795 794 Amortization of unrecognized prior service costs 17 15 34 30 Net periodic benefit cost $ 1,799 $ 1,730 $ 3,696 $ 3,443

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Stock options $ 952 $ 598 $ 1,783 $ 1,257 Restricted stock units 7,365 4,071 14,422 8,368 Unrestricted stock awards 207 255 414 510 Phantom stock units 587 492 1,277 884 Total stock-based compensation $ 9,111 $ 5,416 $ 17,896 $ 11,019 Related tax benefit $ 1,594 $ 1,100 $ 3,128 $ 2,328
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 132 65.80 $ 21.99 Exercised (34 ) 37.58 933 Forfeited (35 ) 47.38 Expired (47 ) 67.43 Outstanding, June 30, 2017 975 $ 47.54 6.7 $ 21,680 Outstanding, January 1, 2018 956 $ 47.10 6.3 $ 21,965 Converted upon acquisition 42 51.86 $ 14.86 Granted 101 69.30 $ 24.83 Exercised (87 ) 40.08 2,779 Forfeited (3 ) 68.43 Expired (66 ) 95.33 Outstanding, June 30, 2018 943 $ 46.92 6.7 $ 14,066 Exercisable June 30, 2018 648 $ 41.97 5.8 $ 12,006 Expected to vest, June 30, 2018 295 $ 57.82 8.7 $ 2,061
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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 Expected volatility — % 30.8 % 30.9 % 32.6 % Risk-free interest rate — % 1.8 % 2.8 % 2.0 % Expected term (years) N/A 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 140 $ 65.48 Released (328 ) $ 12,533 Forfeited (19 ) Outstanding, June 30, 2017 494 Outstanding, January 1, 2018 556 $ 47.68 Converted upon acquisition 579 69.40 Granted 150 67.61 Released (445 ) 53.01 $ 23,609 Forfeited (79 ) 68.56 Outstanding, June 30, 2018 761 62.85 Vested but not released, June 30, 2018 11 $ 656 Expected to vest, June 30, 2018 699 $ 41,948
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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 Expected volatility — % 28.0 % 28.0 % 28.0 % Risk-free interest rate — % 1.4 % 2.2 % 1.1 % Expected term (years) N/A 2.5 2.1 1.7 Weighted average fair value $ — $ 75.58 $ 78.56 $ 77.65
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 (6 ) Outstanding, June 30, 2017 68 Expected to vest, June 30, 2017 68 Outstanding, January 1, 2018 63 $ 51.88 Converted upon acquisition 21 69.40 Granted 32 69.22 Released (32 ) 52.59 Forfeited (3 ) 57.29 Outstanding, June 30, 2018 81 62.76 Expected to vest, June 30, 2018 81

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Net interest and penalties expense $ 315 $ 207 $ 739 $ 413 Accrued interest and penalties recognized were as follows: June 30, 2018 December 31, 2017 (in thousands) Accrued interest $ 3,334 $ 2,706 Accrued penalties 2,359 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: June 30, 2018 December 31, 2017 (in thousands) Unrecognized tax benefits related to uncertain tax positions $ 75,385 $ 56,702 The amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate 74,029 55,312

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 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: June 30, 2018 December 31, 2017 (in thousands) Credit facilities Multicurrency revolving line of credit $ 500,000 $ 500,000 Long-term borrowings (96,000 ) (125,414 ) Standby LOCs issued and outstanding (42,278 ) (31,881 ) Net available for additional borrowings under the multi-currency revolving line of credit $ 361,722 $ 342,705 Net available for additional standby LOCs under sub-facility 257,722 218,119 Unsecured multicurrency revolving lines of credit with various financial institutions Multicurrency revolving lines of credit $ 106,277 $ 110,477 Standby LOCs issued and outstanding (21,274 ) (21,030 ) Short-term borrowings (2,268 ) (916 ) Net available for additional borrowings and LOCs $ 82,735 $ 88,531 Unsecured surety bonds in force $ 96,369 $ 51,344
Schedule of Warranty Accruals	A summary of the warranty accrual account activity is as follows: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Beginning balance $ 41,979 $ 41,536 $ 34,862 $ 43,302 Assumed liabilities from acquisition — — 5,742 — New product warranties 1,464 1,568 2,282 3,929 Other adjustments and expirations 4,437 219 8,481 1,901 Claims activity (2,708 ) (4,248 ) (6,816 ) (10,599 ) Effect of change in exchange rates (1,453 ) 735 (832 ) 1,277 Ending balance 43,719 39,810 43,719 39,810 Less: current portion of warranty 29,443 25,584 29,443 25,584 Long-term warranty $ 14,276 $ 14,226 $ 14,276 $ 14,226
Warranty Expense	Warranty expense was as follows: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Total warranty expense $ 5,901 $ (6,213 ) $ 10,763 $ (2,170 )
Health Benefit Plan Costs and Incurred But Not Reported Accrual Balance	Plan costs were as follows: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Plan costs $ 7,673 $ 6,742 $ 16,354 $ 15,496 The IBNR accrual, which is included in wages and benefits payable, was as follows: June 30, 2018 December 31, 2017 (in thousands) IBNR accrual $ 3,280 $ 2,664

Restructuring (Tables)

Restructuring (Tables)	6 Months Ended
	Jun. 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 six months ended June 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 79,660 624 1,958 82,242 Cash payments (16,324 ) — (1,996 ) (18,320 ) Net assets disposed and impaired — (624 ) — (624 ) Effect of change in exchange rates (5,049 ) — (3 ) (5,052 ) Ending balance, June 30, 2018 $ 95,941 $ — $ 2,430 $ 98,371
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 June 30, 2018 Costs Recognized During the Six Months Ended Expected Remaining Costs to be Recognized at June 30, 2018 (in thousands) Employee severance costs $ 81,669 $ 81,669 $ — Other restructuring costs 18,418 418 18,000 Total $ 100,087 $ 82,087 $ 18,000 Segments: Electricity $ 20,746 $ 18,746 $ 2,000 Gas 50,558 41,558 9,000 Water 22,692 15,692 7,000 Corporate unallocated 6,091 6,091 — Total $ 100,087 $ 82,087 $ 18,000
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 June 30, 2018 Costs Recognized in Prior Periods Costs Recognized During the Six Months Ended Expected Remaining Costs to be Recognized at June 30, 2018 (in thousands) Employee severance costs $ 37,846 $ 39,855 $ (2,009 ) $ — Asset impairments & net loss on sale or disposal 5,546 4,922 624 — Other restructuring costs 15,975 9,435 1,540 5,000 Total $ 59,367 $ 54,212 $ 155 $ 5,000 Segments: Electricity $ 11,234 $ 9,025 $ 709 $ 1,500 Gas 31,084 29,181 (97 ) 2,000 Water 14,562 13,761 (699 ) 1,500 Corporate unallocated 2,487 2,245 242 — Total $ 59,367 $ 54,212 $ 155 $ 5,000

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	6 Months Ended
	Jun. 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Before-tax amount Foreign currency translation adjustment $ (34,271 ) $ 20,520 $ (17,978 ) $ 35,586 Net unrealized gain (loss) on derivative instruments designated as cash flow hedges 3,068 (634 ) 4,504 (537 ) Net hedging (gain) loss reclassified into net income (2,354 ) 259 (2,373 ) 637 Net defined benefit plan loss reclassified to net income 409 418 829 824 Total other comprehensive income (loss), before tax (33,148 ) 20,563 (15,018 ) 36,510 Tax (provision) benefit Foreign currency translation adjustment 111 (73 ) 118 (123 ) Net unrealized gain (loss) on derivative instruments designated as cash flow hedges (173 ) 244 (426 ) 207 Net hedging (gain) loss reclassified into net income (55 ) (100 ) (50 ) (246 ) Net defined benefit plan loss reclassified to net income (8 ) (225 ) (14 ) (230 ) Total other comprehensive income (loss) tax benefit (125 ) (154 ) (372 ) (392 ) Net-of-tax amount Foreign currency translation adjustment (34,160 ) 20,447 (17,860 ) 35,463 Net unrealized gain (loss) on derivative instruments designated as cash flow hedges 2,895 (390 ) 4,078 (330 ) Net hedging (gain) loss reclassified into net income (2,409 ) 159 (2,423 ) 391 Net defined benefit plan loss reclassified to net income 401 193 815 594 Total other comprehensive income (loss), net of tax $ (33,273 ) $ 20,409 $ (15,390 ) $ 36,118
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 35,463 (330 ) — — 35,133 Amounts reclassified from AOCI — 391 — 594 985 Total other comprehensive income (loss) 35,463 61 — 594 36,118 Balances at June 30, 2017 $ (147,523 ) $ 104 $ (14,380 ) $ (31,410 ) $ (193,209 ) Balances at January 1, 2018 $ (128,648 ) $ 966 $ (14,380 ) $ (28,416 ) $ (170,478 ) OCI before reclassifications (17,860 ) 4,078 — — (13,782 ) Amounts reclassified from AOCI — (2,423 ) — 815 (1,608 ) Total other comprehensive income (loss) (17,860 ) 1,655 — 815 (15,390 ) Balances at June 30, 2018 $ (146,508 ) $ 2,621 $ (14,380 ) $ (27,601 ) $ (185,868 )

Fair Values of Financial Inst37

Fair Values of Financial Instruments (Tables)	6 Months Ended
	Jun. 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: June 30, 2018 December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value (in thousands) Assets Cash and cash equivalents $ 162,882 $ 162,882 $ 176,274 $ 176,274 Restricted cash 2,160 2,160 311,061 311,061 Foreign exchange forwards 195 195 41 41 Interest rate swaps 3,796 3,796 2,370 2,370 Interest rate caps 1,235 1,235 489 489 Cross currency swaps 2,175 2,175 — — Liabilities Credit facility USD denominated term loan $ 645,938 $ 654,171 $ 194,063 $ 192,295 Multicurrency revolving line of credit 96,000 97,306 125,414 124,100 Senior notes 400,000 380,000 300,000 301,125 Foreign exchange forwards 276 276 289 289

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Product revenues Electricity $ 212,236 $ 215,271 $ 426,113 $ 421,174 Gas 129,397 130,872 259,640 247,999 Water 118,574 108,570 244,161 217,905 Networks 55,707 — 123,110 — Total Company $ 515,914 $ 454,713 $ 1,053,024 $ 887,078 Service revenues Electricity $ 38,342 $ 35,061 $ 76,870 $ 67,909 Gas 7,635 7,828 15,131 14,912 Water 6,063 5,480 11,670 10,775 Networks 17,936 — 36,416 — Total Company $ 69,976 $ 48,369 $ 140,087 $ 93,596 Total revenues Electricity $ 250,578 $ 250,332 $ 502,983 $ 489,083 Gas 137,032 138,700 274,771 262,911 Water 124,637 114,050 255,831 228,680 Networks 73,643 — 159,526 — Total Company $ 585,890 $ 503,082 $ 1,193,111 $ 980,674 Gross profit Electricity $ 76,987 $ 78,645 $ 146,962 $ 145,895 Gas 40,543 50,536 84,014 101,351 Water 37,835 49,096 75,640 88,668 Networks 21,212 — 49,816 — Total Company $ 176,577 $ 178,277 $ 356,432 $ 335,914 Operating income (loss) Electricity $ 28,997 $ 17,839 $ 26,229 $ 34,923 Gas 15,245 16,977 (13,103 ) 38,708 Water 8,824 16,866 (2,886 ) 25,670 Networks (28,219 ) — (103,729 ) — Corporate unallocated (4,284 ) (14,054 ) (26,396 ) (30,846 ) Total Company 20,563 37,628 (119,885 ) 68,455 Total other income (expense) (13,009 ) (6,061 ) (29,019 ) (11,827 ) Income (loss) before income taxes $ 7,554 $ 31,567 $ (148,904 ) $ 56,628
Revenues By Region	Revenues by region were as follows: Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) United States and Canada $ 348,101 $ 295,737 $ 704,033 $ 564,834 Europe, Middle East, and Africa 184,748 158,766 386,822 321,581 Other (1) 53,041 48,579 102,256 94,259 Total revenues $ 585,890 $ 503,082 $ 1,193,111 $ 980,674 (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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 (in thousands) Electricity $ 6,419 $ 5,774 $ 12,944 $ 11,085 Gas 4,254 4,503 8,456 8,747 Water 4,008 3,887 8,117 7,846 Networks 15,223 — 30,235 — Corporate unallocated 1,003 926 2,227 1,790 Total Company $ 30,907 $ 15,090 $ 61,979 $ 29,468

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 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 38,816 Revenues recognized from beginning contract liability (30,045 ) Increases due to amounts collected or due 137,882 Revenues recognized from current period increases (75,618 ) Other (2,687 ) Ending balance, June 30 $ 128,156

Business Combinations (Tables)

Business Combinations (Tables)	6 Months Ended
	Jun. 30, 2018	Jun. 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 $ 86,783 Property, plant, and equipment 27,670 Other long-term assets (1) (1,578 ) Identifiable intangible assets Core-developed technology 81,900 5 Customer contract and relationships 133,500 10 Trademark and trade names 10,800 3 Total identified intangible assets subject to amortization 226,200 8 In-process research and development (IPR&D) 14,400 Total identified intangible assets 240,600 Goodwill 572,870 Current liabilities (91,301 ) Customer contract and relationships (23,900 ) 5 Long-term liabilities (1,928 ) Total net assets acquired $ 809,216 (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.
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: April 1, 2018 - June 30, 2018 January 5, 2018 - June 30, 2018 Revenues $ 73,643 $ 159,526 Net loss (13,919 ) (43,672 )
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 June 30, Six Months Ended June 30, 2018 2017 2018 2017 ( in thousands) Revenues $ 585,890 $ 764,654 $ 1,193,111 $ 1,292,509 Net income (loss) 2,657 20,240 (128,309 ) (6,994 )
Comverge [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Acquisition, Pro Forma Information	The following supplemental pro forma results are based on the individual historical results of Itron and Comverge, with adjustments to give effect to the combined operations as if the acquisition had been consummated on January 1, 2016. Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 ( in thousands) Revenues $ 585,890 $ 511,024 $ 1,193,111 $ 1,002,786 Net income (loss) 2,657 18,954 (143,009 ) 34,061

Summary of Significant Accoun41

Summary of Significant Accounting Policies Cash, Cash Equivalent, and Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	$ 162,882	$ 176,274	$ 127,880
Current restricted cash included in other current assets	51		0
Long-term restricted cash	2,109	311,010	0
Total cash, cash equivalents, and restricted cash	$ 165,042	$ 487,335	$ 127,880	$ 133,565

Summary of Significant Accoun42

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		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net income (loss) available to common shareholders	$ 2,657	$ 14,097	$ (143,009)	$ 29,942
Weighted average common shares outstanding - Basic (in shares)	39,243	38,683	39,095	38,579
Dilutive effect of stock-based awards (in shares)	546	649	0	695
Weighted average common shares outstanding - Diluted (in shares)	39,789	39,332	39,095	39,274
Earnings (loss) per common share - Basic (in dollars per share)	$ 0.07	$ 0.36	$ (3.66)	$ 0.78
Earnings (loss) per common share - Diluted (in dollars per share)	$ 0.07	$ 0.36	$ (3.66)	$ 0.76

Earnings Per Share Stock-based

Earnings Per Share Stock-based Awards (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Stock-based awards excluded from diluted EPS calculation (antidilutive) (in shares)	0.7	0.2	1.1	0.2

Certain Balance Sheet Compone45

Certain Balance Sheet Components Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Accounts Receivable, Net, Current [Abstract]
Trade receivables (net of allowance of $4,552 and $3,957)	$ 412,848	$ 369,047
Unbilled receivables	30,546	28,982
Total accounts receivable, net	$ 443,394	$ 398,029

Certain Balance Sheet Compone46

Certain Balance Sheet Components Accounts Receivable Allowance for Bad Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Accounts Receivable, Net, Current [Abstract]
Allowance	$ 4,552	$ 4,774	$ 3,957	$ 3,502	$ 3,424	$ 3,320

Certain Balance Sheet Compone47

Certain Balance Sheet Components Summary of the Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accounts Receivable, Net, Current [Abstract]
Beginning balance	$ 4,774	$ 3,424	$ 3,957	$ 3,320
Provision for doubtful accounts, net	334	441	1,254	744
Accounts written-off	(247)	(475)	(505)	(805)
Effect of change in exchange rates	(309)	112	(154)	243
Ending balance	$ 4,552	$ 3,502	$ 4,552	$ 3,502

Certain Balance Sheet Compone48

Certain Balance Sheet Components Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Inventory, Net [Abstract]
Materials	$ 125,917	$ 126,656
Work in process	8,953	9,863
Finished goods	60,186	57,316
Total inventories	$ 195,056	$ 193,835

Certain Balance Sheet Compone49

Certain Balance Sheet Components Property, Plant, and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment, Net [Abstract]
Machinery and equipment	$ 310,855	$ 310,753
Computers and software	110,758	104,384
Buildings, furniture, and improvements	145,893	135,566
Land	15,457	18,433
Construction in progress, including purchased equipment	45,370	39,946
Total cost	628,333	609,082
Accumulated depreciation	(404,898)	(408,314)
Property, plant, and equipment, net	$ 223,435	$ 200,768

Certain Balance Sheet Compone50

Certain Balance Sheet Components Depreciation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 12,908	$ 10,120	$ 26,240	$ 19,949

Intangible Assets and Liabili51

Intangible Assets and Liabilities Gross Carrying Amount and Accumulated Amortization (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Intangible Assets [Line Items]
Intangible assets, Gross	$ 986,107	$ 769,851
Intangible assets, Accumulated (Amortization) Accretion	(695,729)	(674,623)
Intangible assets, Net	290,378	95,228
Intangible assets, Gross	992,507	769,851	$ 747,214	$ 669,896
Intangible assets, Net	296,778	95,228
Intangible liabilities, Gross	(23,900)	0	$ 0	$ 0
Intangible liabilities, Accumulated (Amortization) Accretion	2,609	0
Intangible liabilities, Net	(21,291)	0
Core-developed technology [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	509,896	429,548
Intangible assets, Accumulated (Amortization) Accretion	(413,007)	(399,969)
Intangible assets, Net	96,889	29,579
Customer contracts and relationships [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	384,041	258,586
Intangible assets, Accumulated (Amortization) Accretion	(203,890)	(197,582)
Intangible assets, Net	180,151	61,004
Trademarks and trade names [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	79,569	70,056
Intangible assets, Accumulated (Amortization) Accretion	(67,709)	(66,004)
Intangible assets, Net	11,860	4,052
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	12,601	11,661
Intangible assets, Accumulated (Amortization) Accretion	(11,123)	(11,068)
Intangible assets, Net	1,478	593
In Process Research and Development [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	6,400	0
Intangible assets, Accumulated (Amortization) Accretion	0	0
Intangible assets, Net	$ 6,400	$ 0

Summary of Intangible Asset Acc

Summary of Intangible Asset Account Activity (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Total Intangible Assets [Abstract]
Beginning balance, intangible assets, gross	$ 769,851	$ 669,896
Finite-lived Intangible Assets Acquired	241,539	36,500
Effect of change in exchange rates	(18,883)	40,818
Ending balance, intangible assets, gross	992,507	747,214
Beginning balance, intangible liabilities, gross	0	0
Intangible liabilities acquired	(23,900)	0
Effect of change in exchange rates	0	0
Ending balance, intangible liabilities, gross	$ (23,900)	$ 0

Intangible Assets and Liabili53

Intangible Assets and Liabilities Estimated Future Annual Amortization Expense (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Intangible Assets [Abstract]
2018 (amount remaining at June 30, 2018)	$ 38,786
2,019	72,012
2,020	52,076
2,021	36,469
2,022	26,282
Beyond 2,022	64,753
Total intangible assets subject to amortization (accretion)	290,378	$ 95,228
2018 (amount remaining at June 30, 2018)	(2,609)
2,019	(8,233)
2,020	(8,028)
2,021	(1,963)
2,022	(458)
Beyond 2,022	0
Intangible liabilities, Net	(21,291)	$ 0
2018 (amount remaining at June 30, 2018)	36,177
2,019	63,779
2,020	44,048
2,021	34,506
2,022	25,824
Beyond 2,022	64,753
Total intangible assets (liabilities), net	$ 269,087

Intangible Assets and Liabili54

Intangible Assets and Liabilities Intangible Assets Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 05, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired					100.00%
In process research and development completed			$ 8,000
Amortization of Intangible Assets	$ 17,999	$ 4,970	$ 35,739	$ 9,519

Schedule of Goodwill Allocated

Schedule of Goodwill Allocated to Reporting Segments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 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	572,870
Effect of change in exchange rates	(9,223)
Goodwill before impairment, at end of period	1,781,059
Accumulated impairment losses, at end of period	(661,650)
Goodwill, net, at end of period	555,762	$ 1,119,409
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	(706)
Goodwill before impairment, at end of period	492,367
Accumulated impairment losses, at end of period	(378,832)
Goodwill, net, at end of period	114,241	113,535
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	(6,669)
Goodwill before impairment, at end of period	346,034
Accumulated impairment losses, at end of period	0
Goodwill, net, at end of period	352,703	346,034
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	(1,605)
Goodwill before impairment, at end of period	370,031
Accumulated impairment losses, at end of period	(282,818)
Goodwill, net, at end of period	88,818	87,213
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	572,870
Effect of change in exchange rates	(243)
Goodwill before impairment, at end of period	572,627
Accumulated impairment losses, at end of period	0
Goodwill, net, at end of period	$ 0	$ 572,627

Schedule of Debt (Details)

Schedule of Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jan. 19, 2018	Dec. 31, 2017	Dec. 22, 2017
Debt Instrument [Line Items]
Senior notes		$ 100,000		$ 300,000
Total debt	$ 741,938
Current portion of debt	20,313		$ 19,688
Long-term debt	1,098,567		593,572
2018 (amount remaining at June 30, 2018)	8,125
2,019	28,438
2,020	44,777
2,021	60,938
2,022	65,000
2,023	534,660
Secured Debt [Member]
Debt Instrument [Line Items]
Total debt	1,141,938		619,477
Current portion of debt	20,313		19,688
Long-term debt	1,098,567		593,572
USD Denominated Term Loan [Member]
Debt Instrument [Line Items]
USD denominated term loan	645,938		194,063
Deferred Finance Costs, Noncurrent, Net	5,559		629
Line of Credit [Member]
Debt Instrument [Line Items]
Multicurrency revolving line of credit	96,000		125,414
Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes	400,000		300,000
Deferred Finance Costs, Noncurrent, Net	$ 17,499		$ 5,588

Credit Facility Additional Info

Credit Facility Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 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	96,000		$ 125,414
Line of Credit Facility, Remaining Borrowing Capacity	361,722		$ 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	4.10%
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	Jun. 30, 2018	Apr. 30, 2018	Jan. 19, 2018	Dec. 31, 2017	Dec. 22, 2017
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage						1.38%
Senior notes							$ 100,000		$ 300,000
Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage								5.00%
Senior notes					$ 400,000			$ 300,000
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, Description				0.35
Scenario, Forecast [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption, Description				0.65

Derivative and Nonderivative He

Derivative and Nonderivative Hedging Instrument Fair Value Disclosure (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Asset Derivatives [Abstract]
Gross Amounts of Recognized Assets Presented in the Consolidated Balance Sheets	$ 7,401,000	$ 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	195,000	41,000
Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Liability Derivatives [Abstract]
Foreign exchange forward contracts	276,000	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	1,710,000	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	2,086,000	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	396,000	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	839,000	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	1,523,000	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	$ 652,000	$ 0

Activity of Hedging Instruments

Activity of Hedging Instruments in Accumulated OCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			$ (170,478)
Unrealized gain (loss) on derivative instruments	$ 2,895	$ (390)	4,078	$ (330)
Realized losses reclassified into net income (loss)	(2,409)	159	(2,423)	391
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(185,868)		(185,868)
Accumulated Net Gain (Loss) from Derivative and Nonderivative Instruments Designated as Hedging Instruments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			(13,414)	(14,337)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	$ (11,759)	$ (14,276)	$ (11,759)	$ (14,276)

Offsetting of Derivative Assets

Offsetting of Derivative Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross Amounts of Recognized Assets Presented in the Consolidated Balance Sheets	$ 7,401	$ 2,900
Derivative Financial Instruments Not Offset in the Consolidated Balance Sheets	(276)	(90)
Cash Collateral Received Not Offset in the Consolidated Balance Sheets	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	$ 7,125	$ 2,810

Offsetting of Derivative Liabil

Offsetting of Derivative Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross Amounts of Recognized Liabilities Presented in the Consolidated Balance Sheets	$ 276	$ 289
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	(276)	(90)
Cash Collateral Pledged Not Offset in the Consolidated Balance Sheets	0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ 0	$ 199

Derivative Financial Instrume63

Derivative Financial Instruments Narrative (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2018USD ($)	Dec. 31, 2015USD ($)	Apr. 30, 2018USD ($)	Dec. 31, 2017USD ($)	Jun. 30, 2017USD ($)	Dec. 31, 2016USD ($)
Net unrealized loss on hedging instruments	$ 185,868,000			$ 170,478,000
Total debt	741,938,000
Debt Instrument, Interest Rate, Stated Percentage			1.38%
Secured Debt [Member]
Total debt	1,141,938,000			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			5
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	$ 1,700,000
Interest Rate Cap [Member]
Number of Interest Rate Derivatives Held	3
Derivative, Notional Amount	$ 100,000,000
Derivative, Cap Interest Rate	2.00%
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ (100,000)
Derivative Purchase Price		$ 1,700,000
Currency Swap [Member]
Derivative, Notional Amount			$ 56,000,000
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months			$ 1,500,000
Forward Contracts [Member]
Description of Derivative Activity Volume	57
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Minimum [Member]
Derivative, Notional Amount	$ 133,000
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	$ 742,000,000

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		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ 2,354	$ (259)	$ 2,373	$ (637)
Interest Rate Swap [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	513	(517)	1,760	(336)
Interest Rate Swap [Member] | Interest Expense [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	246	(210)	335	(545)
Interest Rate Cap [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	181	(117)	369	(201)
Interest Rate Cap [Member] | Interest Expense [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(466)	(50)	(536)	(93)
Currency Swap 1 [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	2,376	0	2,376	0
Currency Swap 2 [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	0	0	0	0
Currency Swap [Member] | Interest Expense [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	207	0	207	0
Currency Swap [Member] | Other Income (Expense) [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ 2,368	$ 0	$ 2,368	$ 0

Derivatives Not Designated as H

Derivatives Not Designated as Hedging Relationships (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other Income (Expense) [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Foreign exchange forward contracts	$ 3,636	$ (2,063)	$ 2,113	$ (3,805)
Interest Rate Cap [Member] | Interest Expense [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	$ 95	$ (175)	$ 377	$ (301)

Schedule of Amounts Recognized

Schedule of Amounts Recognized in the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Defined Benefit Plan [Abstract]
Plan assets in other long-term assets	$ 938	$ 991
Current portion of pension benefit obligation in wages and benefits payable	3,123	3,260
Long-term portion of pension benefit obligation	94,386	95,717
Pension benefit obligation, net	$ 96,571	$ 97,986

Schedule of Net Periodic Pensio

Schedule of Net Periodic Pension Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plan [Abstract]
Service cost	$ 968	$ 924	$ 2,017	$ 1,852
Interest cost	591	535	1,200	1,060
Expected return on plan assets	(169)	(147)	(350)	(293)
Amortization of actuarial net loss	392	403	795	794
Amortization of unrecognized prior service costs	17	15	34	30
Net periodic benefit cost	$ 1,799	$ 1,730	$ 3,696	$ 3,443

Stock-Based Compensation Expens

Stock-Based Compensation Expense and Related Tax Benefit (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options	$ 952	$ 598	$ 1,783	$ 1,257
Restricted stock units	7,365	4,071	14,422	8,368
Unrestricted stock awards	207	255	414	510
Phantom stock units	587	492	1,277	884
Total stock-based compensation	9,111	5,416	17,896	11,019
Related tax benefit	$ 1,594	$ 1,100	$ 3,128	$ 2,328

Stock Option Summary (Details)

Stock Option Summary (Details) - Employee Stock Option [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
[Line Items]
Outstanding, beginning balance, Number	956	959	959
Outstanding, beginning balance, Weighted Average Exercise Price Per Share	$ 47.10	$ 45.64	$ 45.64
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	6 years 8 months 12 days	6 years 8 months 12 days	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, number	42
Shares converted upon acquisition, Weighted Average Exercise Price	$ 51.86
Shares converted upon acquisition, Weighted Average Grant Date Fair Value	$ 14.86
Options granted, number	101	132
Granted, Weighted Average Exercise Price Per Share	$ 69.30	$ 65.80
Granted, Weighted Average Grant Date Fair Value	$ 24.83	$ 21.99
Exercised, Number	(87)	(34)
Exercised, Weighted Average Exercise Price Per Share	$ 40.08	$ 37.58
Exercised, Aggregate Intrinsic Value	$ 2,779	$ 933
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares	(3)	(35)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value	$ 68.43	$ 47.38
Expired, Number	(66)	(47)
Expired, Weighted Average Exercise Price Per Share	$ 95.33	$ 67.43
Outstanding, ending balance, Number	943	975	956	959
Outstanding, ending balance, Weighted Average Exercise Price Per Share	$ 46.92	$ 47.54	$ 47.10	$ 45.64
Outstanding, ending balance, Aggregate Intrinsic Value	$ 14,066	$ 21,680	$ 21,965	$ 19,125
Exercisable, Number	648
Exercisable, Weighted Average Exercise Price Per Share	$ 41.97
Exercisable, Weighted Average Remaining Contractual Term	5 years 9 months 18 days
Exercisable, Aggregate Intrinsic Value	$ 12,006
Expected to Vest [Member]
[Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	8 years 8 months 12 days
Outstanding, ending balance, Number	295
Outstanding, ending balance, Weighted Average Exercise Price Per Share	$ 57.82
Outstanding, ending balance, Aggregate Intrinsic Value	$ 2,061

Stock Option Black Scholes Opti

Stock Option Black Scholes Option Pricing Model Assumptions (Details) - Employee Stock Option [Member] - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Expected volatility	0.00%	30.80%	30.90%	32.60%
Risk-free interest rate	0.00%	1.80%	2.80%	2.00%
Expected term (years)		5 years 6 months	6 years 1 month 6 days	5 years 6 months
Granted, Weighted Average Grant Date Fair Value			$ 24.83	$ 21.99

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		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
[Line Items]
Outstanding, beginning balance, Number			556	701
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 62.85		$ 62.85		$ 47.68
Shares converted upon acquisition, number			579
Shares converted upon acquisition, Weighted Average Grant Date Fair Value			$ 69.40
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			150	140
Weighted average fair value			$ 67.61	$ 65.48
Forfeited, Number			(79)	(19)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value			$ 68.56
Outstanding, ending balance, Number	761	494	761	494
Vested and Released [Member]
[Line Items]
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures			445	328
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value			$ 53.01
Released, Aggregate Intrinsic Value			$ 23,609	$ 12,533
Vested but Not Released [Member]
[Line Items]
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures			11
Released, Aggregate Intrinsic Value			$ 656
Expected to Vest [Member]
[Line Items]
Outstanding, ending balance, Number	699		699
Expected to vest, Aggregate Intrinsic Value	$ 41,948		$ 41,948
Long Term Performance Restricted Stock Award [Member]
[Line Items]
Expected volatility	0.00%	28.00%	28.00%	28.00%
Risk-free interest rate	0.00%	1.40%	2.20%	1.10%
Expected term (years)		2 years 6 months	2 years 1 month 6 days	1 year 8 months 12 days
Weighted average fair value	$ 0	$ 75.58	$ 78.56	$ 77.65

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		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value			$ 67.61	$ 65.48
Long Term Performance Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	0.00%	28.00%	28.00%	28.00%
Risk-free interest rate	0.00%	1.40%	2.20%	1.10%
Expected term (years)		2 years 6 months	2 years 1 month 6 days	1 year 8 months 12 days
Weighted average fair value	$ 0	$ 75.58	$ 78.56	$ 77.65

Stock-Based Compensation Phanto

Stock-Based Compensation Phantom Stock Units Summary (Details) - Phantom Share Units (PSUs) [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 4.1
Outstanding, beginning balance, Number	63	62
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 62.76		$ 51.88
Shares converted upon acquisition, number	21
Shares converted upon acquisition, Weighted Average Grant Date Fair Value	$ 69.40
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	32	32
Weighted average fair value	$ 69.22	$ 65.55
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	(32)	(20)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 52.59
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(3)	(6)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 57.29
Outstanding, ending balance, Number	81	68
Expected to Vest [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, ending balance, Number	81	68

Stock-Based Compensation Narrat

Stock-Based Compensation Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)shares	Dec. 31, 2017USD ($)
Employee Stock Option [Member]
[Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $	$ 4.1
Unrecognized compensation expense, Expected weighted average period for recognition (years)	1 year 7 months 6 days
Restricted Stock Units (RSUs) [Member]
[Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $	$ 48.8
Unrecognized compensation expense, Expected weighted average period for recognition (years)	2 years 2 months 12 days
Phantom Share Units (PSUs) [Member]
[Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $	$ 4.1
Unrecognized compensation expense, Expected weighted average period for recognition (years)	2 years 29 days
Deferred Compensation Share-based Arrangements, Liability, Current | $	$ 1	$ 1.7
Employee Stock Purchase Plan [Member]
[Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares	322,765
Stock Incentive Plan [Member]
[Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | shares	12,623,538
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares	6,571,411
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 | shares	2,880,039

Income Tax Contingencies (Detai

Income Tax Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Net interest and penalties expense	$ 315	$ 207	$ 739	$ 413
Accrued interest	3,334		3,334		$ 2,706
Accrued penalties	2,359		2,359		2,426
Unrecognized tax benefits related to uncertain tax positions	75,385		75,385		56,702
The amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate	$ 74,029		$ 74,029		$ 55,312

Income Taxes Narrative (Details

Income Taxes Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Examination [Line Items]
Effective Income Tax Rate Reconciliation, Percent	50.00%	52.45985%	5.00%	45.21968%
Unrecognized Tax Benefits	$ 75,385		$ 75,385		$ 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			2,015
SSNI Plan [Member]
Income Tax Examination [Line Items]
Unrecognized Tax Benefits	$ 16,400		$ 16,400

Commitments and Contingencies A

Commitments and Contingencies Available Lines of Credit, Outstanding Standby Letter of Credits, and Bonds (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jan. 05, 2018	Dec. 31, 2017
Line of Credit Facility [Line Items]
Multicurrency revolving line of credit		$ 500,000
Line of Credit Facility, Capacity remaining to support letters of credit	$ 257,722		$ 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	96,000		125,414
Letters of Credit Outstanding, Amount	(42,278)		(31,881)
Unsecured Multicurrency Revolving Lines of Credit [Member]
Line of Credit Facility [Line Items]
Multicurrency revolving line of credit	106,277		110,477
Letters of Credit Outstanding, Amount	(21,274)		(21,030)
Short-term borrowings	(2,268)		(916)
Line of Credit Facility, Remaining Borrowing Capacity	82,735		88,531
Surety Bond [Member]
Line of Credit Facility [Line Items]
Unsecured surety bonds in force	96,369		51,344
Line of Credit [Member]
Line of Credit Facility [Line Items]
Long-term Line of Credit	96,000		125,414
Line of Credit Facility, Remaining Borrowing Capacity	$ 361,722		$ 342,705

Commitments and Contingencies W

Commitments and Contingencies Warranty Account Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Beginning balance	$ 41,979	$ 41,536	$ 34,862	$ 43,302
Assumed liabilities from acquisition	0	0	5,742	0
New product warranties	1,464	1,568	2,282	3,929
Other changes/adjustments to warranties	4,437	219	8,481	1,901
Claims activity	(2,708)	(4,248)	(6,816)	(10,599)
Effect of change in exchange rates	(1,453)	735	(832)	1,277
Ending balance	43,719	39,810	43,719	39,810
Less: current portion of warranty	29,443	25,584	29,443	25,584
Long-term warranty	$ 14,276	$ 14,226	$ 14,276	$ 14,226

Commitments and Contingencies79

Commitments and Contingencies Warranty Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Unusual or Infrequent Item, or Both, Insurance Proceeds		$ 8,000		$ 8,000
Total warranty expense	$ 5,901	$ (6,213)	$ 10,763	$ (2,170)

Commitments and Contingencies H

Commitments and Contingencies Health Benefit Plan Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
US Employee Group Health Insurance Expense	$ 7,673	$ 6,742	$ 16,354	$ 15,496

Commitments and Contingencies I

Commitments and Contingencies Incurred But Not Reported Health Benefit Cost Accrual (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
IBNR Accrual	$ 3,280	$ 2,664

Restructuring Restructuring Exp

Restructuring Restructuring Expected Costs - 2018 Projects (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring	$ (5,623)	$ 5,043	$ 82,242	$ 8,095
2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	100,087		100,087
Restructuring			82,087
Restructuring and Related Cost, Expected Cost Remaining	18,000		18,000
Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			624
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			1,958
Other Restructuring [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	18,418		18,418
Restructuring			418
Restructuring and Related Cost, Expected Cost Remaining	18,000		18,000
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			79,660
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
Corporate, Non-Segment [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	6,091		6,091
Restructuring			6,091
Restructuring and Related Cost, Expected Cost Remaining	0		0
Water Operating Segment [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	22,692		22,692
Restructuring			15,692
Restructuring and Related Cost, Expected Cost Remaining	7,000		7,000
Gas Operating Segment [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	50,558		50,558
Restructuring			41,558
Restructuring and Related Cost, Expected Cost Remaining	9,000		9,000
Electricity Operating Segment [Member] | 2018 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	20,746		20,746
Restructuring			18,746
Restructuring and Related Cost, Expected Cost Remaining	$ 2,000		$ 2,000

Restructuring Expected Costs -

Restructuring Expected Costs - 2016 Projects (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring	$ (5,623)	$ 5,043	$ 82,242	$ 8,095
2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	59,367		59,367
Restructuring and Related Cost, Cost Incurred to Date					$ 54,212
Restructuring			155
Remaining Costs to be Recognized at Period End	5,000		5,000
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			79,660
Employee Severance [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	37,846		37,846
Restructuring and Related Cost, Cost Incurred to Date					39,855
Restructuring			(2,009)
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			624
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	5,546		5,546
Restructuring and Related Cost, Cost Incurred to Date					4,922
Restructuring			624
Remaining Costs to be Recognized at Period End	0		0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring			1,958
Other Restructuring [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	15,975		15,975
Restructuring and Related Cost, Cost Incurred to Date					9,435
Restructuring			1,540
Remaining Costs to be Recognized at Period End	5,000		5,000
Electricity Operating Segment [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	11,234		11,234
Restructuring and Related Cost, Cost Incurred to Date					9,025
Restructuring			709
Remaining Costs to be Recognized at Period End	1,500		1,500
Gas Operating Segment [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	31,084		31,084
Restructuring and Related Cost, Cost Incurred to Date					29,181
Restructuring			(97)
Remaining Costs to be Recognized at Period End	2,000		2,000
Water Operating Segment [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	14,562		14,562
Restructuring and Related Cost, Cost Incurred to Date					13,761
Restructuring			(699)
Remaining Costs to be Recognized at Period End	1,500		1,500
Corporate, Non-Segment [Member] | 2016 Projects [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	2,487		2,487
Restructuring and Related Cost, Cost Incurred to Date					$ 2,245
Restructuring			242
Remaining Costs to be Recognized at Period End	$ 0		$ 0

Restructuring Related Balance S

Restructuring Related Balance Sheet Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Beginning balance, January 1, 2018			$ 40,125
Costs charged to expense	$ (5,623)	$ 5,043	82,242	$ 8,095
Cash payments			(18,320)
Net assets disposed and impaired			(624)
Effect of change in exchange rates			(5,052)
Ending balance, June 30, 2018	98,371		98,371
Accrued Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, January 1, 2018			37,654
Costs charged to expense			79,660
Cash payments			(16,324)
Net assets disposed and impaired			0
Effect of change in exchange rates			(5,049)
Ending balance, June 30, 2018	95,941		95,941
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			624
Cash payments			0
Net assets disposed and impaired			(624)
Effect of change in exchange rates			0
Ending balance, June 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			1,958
Cash payments			(1,996)
Net assets disposed and impaired			0
Effect of change in exchange rates			(3)
Ending balance, June 30, 2018	$ 2,430		$ 2,430

Restructuring Additional Inform

Restructuring Additional Information (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Restructuring and Related Activities [Abstract]
Restructuring Reserve, Current	$ 48.8	$ 32.5
Restructuring Reserve, Noncurrent	$ 49.6	$ 7.6

Shareholders' Equity Preferred

Shareholders' Equity Preferred Stock (Details) - $ / shares	Jun. 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)

Shareholders' Equity Stock Repu

Shareholders' Equity Stock Repurchase Plan (Details) - USD ($) shares in Thousands, $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Feb. 23, 2017
Equity [Abstract]
Stock Repurchase Program, Authorized Amount			$ 50
Stock Repurchased During Period, Shares	0	0

Shareholders' Equity Other Comp

Shareholders' Equity Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Before-tax amount [Abstract]
Foreign currency translation adjustment	$ (34,271)	$ 20,520	$ (17,978)	$ 35,586
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges	3,068	(634)	4,504	(537)
Net hedging (gain) loss reclassified into net income	(2,354)	259	(2,373)	637
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	409	418	829	824
Total other comprehensive income (loss), before tax	(33,148)	20,563	(15,018)	36,510
Tax (provision) benefit [Abstract]
Foreign currency translation adjustment	111	(73)	118	(123)
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges	(173)	244	(426)	207
Net hedging (gain) loss reclassified into net income	(55)	(100)	(50)	(246)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	(8)	(225)	(14)	(230)
Total other comprehensive income (loss) tax benefit	(125)	(154)	(372)	(392)
Net-of-tax amount [Abstract]
Foreign currency translation adjustment	(34,160)	20,447	(17,860)	35,463
Net unrealized gain (loss) on derivative instruments designated as cash flow hedges	2,895	(390)	4,078	(330)
Net hedging loss (gain) reclassified into net income	(2,409)	159	(2,423)	391
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax	401	193	815	594
Total other comprehensive income (loss), net of tax	$ (33,273)	$ 20,409	$ (15,390)	$ 36,118

Shareholders' Equity Accumulate

Shareholders' Equity Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			$ (170,478)
Total other comprehensive income (loss), net of tax	$ (33,273)	$ 20,409	(15,390)	$ 36,118
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(185,868)		(185,868)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			(170,478)	(229,327)
OCI before reclassifications			(13,782)	35,133
Amounts reclassified from AOCI			(1,608)	985
Total other comprehensive income (loss), net of tax			(15,390)	36,118
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(185,868)	(193,209)	(185,868)	(193,209)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			(128,648)	(182,986)
OCI before reclassifications			(17,860)	35,463
Amounts reclassified from AOCI			0	0
Total other comprehensive income (loss), net of tax			(17,860)	35,463
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(146,508)	(147,523)	(146,508)	(147,523)
Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			966	43
OCI before reclassifications			4,078	(330)
Amounts reclassified from AOCI			(2,423)	391
Total other comprehensive income (loss), net of tax			1,655	61
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	2,621	104	2,621	104
Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			(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
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(14,380)	(14,380)	(14,380)	(14,380)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			(28,416)	(32,004)
OCI before reclassifications			0	0
Amounts reclassified from AOCI			815	594
Total other comprehensive income (loss), net of tax			815	594
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	$ (27,601)	$ (31,410)	$ (27,601)	$ (31,410)

Schedule of Fair Values of Fina

Schedule of Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jan. 19, 2018	Dec. 31, 2017	Dec. 22, 2017	Jun. 30, 2017
Assets
Cash and cash equivalents	$ 162,882		$ 176,274		$ 127,880
Liabilities
Senior notes		$ 100,000		$ 300,000
USD Denominated Term Loan [Member]
Liabilities
USD denominated term loan	645,938		194,063
Line of Credit [Member]
Liabilities
Multicurrency revolving line of credit	96,000		125,414
Reported Value Measurement [Member]
Assets
Cash and cash equivalents	162,882		176,274
Restricted cash	2,160		311,061
Foreign exchange forwards	195		41
Liabilities
Senior notes	400,000		300,000
Foreign exchange forwards	276		289
Reported Value Measurement [Member] | USD Denominated Term Loan [Member]
Liabilities
USD denominated term loan	645,938		194,063
Reported Value Measurement [Member] | Line of Credit [Member]
Liabilities
Multicurrency revolving line of credit	96,000		125,414
Estimate of Fair Value Measurement [Member]
Assets
Cash and cash equivalents	162,882		176,274
Restricted cash	2,160		311,061
Foreign exchange forwards	195		41
Liabilities
Senior notes	380,000		301,125
Foreign exchange forwards	276		289
Estimate of Fair Value Measurement [Member] | USD Denominated Term Loan [Member]
Liabilities
USD denominated term loan, fair value	654,171		192,295
Estimate of Fair Value Measurement [Member] | Line of Credit [Member]
Liabilities
Multicurrency revolving line of credit, fair value	97,306		124,100
Interest Rate Swap [Member] | Reported Value Measurement [Member]
Assets
Derivative asset, noncurrent	3,796		2,370
Interest Rate Swap [Member] | Estimate of Fair Value Measurement [Member]
Assets
Derivative asset, noncurrent	3,796		2,370
Interest Rate Cap [Member] | Reported Value Measurement [Member]
Assets
Derivative asset, noncurrent	1,235		489
Interest Rate Cap [Member] | Estimate of Fair Value Measurement [Member]
Assets
Derivative asset, noncurrent	1,235		489
Currency Swap [Member] | Reported Value Measurement [Member]
Assets
Derivative asset, noncurrent	2,175		0
Currency Swap [Member] | Estimate of Fair Value Measurement [Member]
Assets
Derivative asset, noncurrent	$ 2,175		$ 0

Information By Segment (Details

Information By Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Product revenues	$ 515,914	$ 454,713	$ 1,053,024	$ 887,078
Service revenues	69,976	48,369	140,087	93,596
Revenues	585,890	503,082	1,193,111	980,674
Gross profit	176,577	178,277	356,432	335,914
Operating income (loss)	20,563	37,628	(119,885)	68,455
Total other income (expense)	(13,009)	(6,061)	(29,019)	(11,827)
Income (loss) before income taxes	7,554	31,567	(148,904)	56,628
Electricity Operating Segment [Member]
Segment Reporting Information [Line Items]
Product revenues	212,236	215,271	426,113	421,174
Service revenues	38,342	35,061	76,870	67,909
Revenues	250,578	250,332	502,983	489,083
Gross profit	76,987	78,645	146,962	145,895
Operating income (loss)	28,997	17,839	26,229	34,923
Gas Operating Segment [Member]
Segment Reporting Information [Line Items]
Product revenues	129,397	130,872	259,640	247,999
Service revenues	7,635	7,828	15,131	14,912
Revenues	137,032	138,700	274,771	262,911
Gross profit	40,543	50,536	84,014	101,351
Operating income (loss)	15,245	16,977	(13,103)	38,708
Water Operating Segment [Member]
Segment Reporting Information [Line Items]
Product revenues	118,574	108,570	244,161	217,905
Service revenues	6,063	5,480	11,670	10,775
Revenues	124,637	114,050	255,831	228,680
Gross profit	37,835	49,096	75,640	88,668
Operating income (loss)	8,824	16,866	(2,886)	25,670
Networks Operating Segment [Member]
Segment Reporting Information [Line Items]
Product revenues	55,707	0	123,110	0
Service revenues	17,936	0	36,416	0
Revenues	73,643	0	159,526	0
Gross profit	21,212	0	49,816	0
Operating income (loss)	(28,219)	0	(103,729)	0
Corporate Unallocated [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	$ (4,284)	$ (14,054)	$ (26,396)	$ (30,846)

Segment Information Narrative (

Segment Information Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting [Abstract]
Number of Reportable Segments			4	3
Revenue, Major Customer [Line Items]
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.
Revenue [Member] | Threshold for Reporting Customer Concentration [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%	10.00%
Revenue [Member] | Threshold for Reporting Customer Concentration [Member] | Gas Operating Segment [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage		10.00%		10.00%
Revenue [Member] | Threshold for Reporting Customer Concentration [Member] | Water Operating Segment [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%	10.00%
Revenue [Member] | Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	10.00%	11.00%
Revenue [Member] | Customer A [Member] | Electricity Operating Segment [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	23.00%	22.00%	22.00%	20.00%
Revenue [Member] | Customer A [Member] | Gas Operating Segment [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	12.00%		12.00%
Revenue [Member] | Customer A [Member] | Networks Operating Segment [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	18.00%		13.00%
Revenue [Member] | Customer B [Member] | Electricity Operating Segment [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	16.00%		16.00%
Revenue [Member] | Customer B [Member] | Networks Operating Segment [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	15.00%		13.00%

Segment Information Revenues By

Segment Information Revenues By Region (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues from External Customers [Line Items]
Revenue, Net		$ 585,890	$ 503,082	$ 1,193,111	$ 980,674
United States and Canada [Member]
Revenues from External Customers [Line Items]
Revenue, Net		348,101	295,737	704,033	564,834
Europe, Middle East, and Africa [Member]
Revenues from External Customers [Line Items]
Revenue, Net		184,748	158,766	386,822	321,581
Other [Member]
Revenues from External Customers [Line Items]
Revenue, Net	[1]	$ 53,041	$ 48,579	$ 102,256	$ 94,259
[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		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 30,907	$ 15,090	$ 61,979	$ 29,468
Electricity Operating Segment [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	6,419	5,774	12,944	11,085
Gas Operating Segment [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	4,254	4,503	8,456	8,747
Water Operating Segment [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	4,008	3,887	8,117	7,846
Networks Operating Segment [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	15,223	0	30,235	0
Corporate Unallocated [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 1,003	$ 926	$ 2,227	$ 1,790

Revenue Recognition Revenue Con

Revenue Recognition Revenue Contract Assets and Liabilities Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Revenue Recognition and Deferred Revenue [Abstract]
Contract with Customer, net		$ 59,808
Contract with Customer, Liability, Increase (Decrease) for Contract Acquired in Business Combination		38,816
Revenue recognized from beginning contract liability		(30,045)
Increases due to amounts billed in the current period		137,882
Revenue recognized from amounts added in the current period	$ 2,800	(75,618)
Other adjustments		(2,687)
Contract with Customer, net	$ 128,156	$ 128,156

Revenue Recognition Narrative (

Revenue Recognition Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Revenue Recognition and Deferred Revenue [Abstract]
Contract with Customer, Asset, Gross	$ 14,300	$ 14,300	$ 11,300
Contract with Customer, Liability	142,400	142,400	71,100
Contract with customer, revenue recognized	2,800	(75,618)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred Revenue, Current	94,546	94,546	41,438
Retained Earnings (Accumulated Deficit)	(469,155)	(469,155)	$ (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	21,000	21,000
Deferred Revenue, Current	9,000	9,000
Retained Earnings (Accumulated Deficit)	$ 15,000	$ 15,000

Revenue Recognition Remaing Per

Revenue Recognition Remaing Performance Obligation (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01 $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation	$ 692
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months

Business Combinations Narrative

Business Combinations Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Jan. 05, 2018
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 802,500
Goodwill acquired		$ 572,870
SIlver Spring Networks, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net				$ 809,216
Cash Acquired from Acquisition		97,800
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned				$ 6,700
Goodwill acquired		572,900
Business Acquisition, Transaction Costs		15,600
Business Combination, Integration Related Costs	$ 12,100	$ 58,900
Comverge [Member]
Business Acquisition [Line Items]
Cash Acquired from Acquisition			$ 18,200
Business Combination, Consideration Transferred, Other			$ 100,000

Business Combinations Purchase

Business Combinations Purchase Price Allocation (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jan. 05, 2018
Business Acquisition [Line Items]
Business Combination, Current Assets				$ 86,783
Business Combination, Property, Plant, and Equipment				27,670
Business Combination, Other Noncurrent Assets	[1]			(1,578)
Business Combination, Intangibles Assets				226,200
Acquired Intangible Assets, Weighted Average Useful Life		8 years
Business Combination, Intangible Assets, Other than Goodwill				240,600
Goodwill acquired		$ 572,870
Business Combination, Current Liabilities				(91,301)
Intangible liabilities acquired		(23,900)	$ 0
Business Combination, Noncurrent Liabilities				(1,928)
SIlver Spring Networks, Inc. [Member]
Business Acquisition [Line Items]
Goodwill acquired		$ 572,900
Business Combination, Goodwill, and Liabilities Assumed, Net				809,216
Core Developed Technology [Member]
Business Acquisition [Line Items]
Business Combination, Intangibles Assets				81,900
Acquired Intangible Assets, Weighted Average Useful Life		5 years
Customer Contracts And Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Intangibles Assets				133,500
Acquired Intangible Assets, Weighted Average Useful Life		10 years
Intangible liabilities acquired		$ (23,900)
Acquired Finite-lived Intangible Liabilities, Weighted Average Useful Life		5 years
Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Intangibles Assets				10,800
Acquired Intangible Assets, Weighted Average Useful Life		3 years
In Process Research and Development [Member]
Business Acquisition [Line Items]
Business Combination, Intangibles 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	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Business Acquisition [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	$ 73,643	$ 159,526
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual	$ (13,919)	$ (43,672)

Business Combinations Pro Forma

Business Combinations Pro Forma Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
SIlver Spring Networks, Inc. [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Acquisition, Pro Forma Revenue	$ 585,890	$ 764,654	$ 1,193,111	$ 1,292,509
Business Acquisition, Pro Forma Net Income (Loss)	2,657	20,240	(128,309)	(6,994)
Comverge [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Acquisition, Pro Forma Revenue	585,890	511,024	1,193,111	1,002,786
Business Acquisition, Pro Forma Net Income (Loss)	$ 2,657	$ 18,954	$ (143,009)	$ 34,061