Belden (BDC) 10-Q 6 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 02, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	BDC
Entity Registrant Name	BELDEN INC.
Entity Central Index Key	0000913142
Current Fiscal Year End Date	--12-31
Entity File Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		39,454,981

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 338,982	$ 420,610
Receivables, net	404,609	465,939
Inventories, net	326,770	316,418
Other current assets	59,381	55,757
Total current assets	1,129,742	1,258,724
Property, plant and equipment, less accumulated depreciation	371,881	365,970
Operating lease right-of-use assets	85,327	0
Goodwill	1,563,827	1,557,653
Intangible assets, less accumulated amortization	495,322	511,093
Deferred income taxes	79,254	56,018
Other long-lived assets	32,605	29,863
Total assets	3,757,958	3,779,321
Current liabilities:
Accounts payable	256,939	352,646
Accrued liabilities	315,117	364,276
Total current liabilities	572,056	716,922
Long-term debt	1,440,492	1,463,200
Postretirement benefits	131,607	132,791
Deferred income taxes	63,385	39,943
Long-term operating lease liabilities	79,091	0
Other long-term liabilities	39,998	38,877
Stockholders’ equity:
Preferred stock	1	1
Common stock	503	503
Additional paid-in capital	1,138,987	1,139,395
Retained earnings	936,479	922,000
Accumulated other comprehensive loss	(45,898)	(74,907)
Treasury stock	(599,161)	(599,845)
Total Belden stockholders’ equity	1,430,911	1,387,147
Noncontrolling interest	418	441
Total stockholders’ equity	1,431,329	1,387,588
Total liabilities and stockholders' equity	$ 3,757,958	$ 3,779,321

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Income Statement [Abstract]
Revenues	$ 587,175	$ 605,565
Cost of sales	(362,447)	(374,971)
Gross profit	224,728	230,594
Selling, general and administrative expenses	(122,788)	(124,872)
Research and development expenses	(34,154)	(37,101)
Amortization of intangibles	(23,341)	(24,418)
Operating income	44,445	44,203
Interest expense, net	(14,193)	(16,978)
Non-operating pension benefit (cost)	547	(275)
Loss on debt extinguishment	0	(19,960)
Income before taxes	30,799	6,990
Income tax expense	(5,621)	(4,420)
Net income	25,178	2,570
Less: Net loss attributable to noncontrolling interest	(24)	(48)
Net income attributable to Belden	25,202	2,618
Less: Preferred stock dividends	8,733	8,733
Net income (loss) attributable to Belden common stockholders	$ 16,469	$ (6,115)
Weighted average number of common shares and equivalents:
Basic (in shares)	39,420	41,633
Diluted (in shares)	39,660	41,633
Basic income per share attributable to Belden common stockholders (in usd per share)	$ 0.42	$ (0.15)
Diluted income (loss) per share attributable to Belden common stockholders	$ 0.42	$ (0.15)
Comprehensive income (loss) attributable to Belden	$ 54,211	$ (28,790)
Common stock dividends declared per share (in usd per share)	$ 0.05	$ 0.05

Condensed Consolidated Cash Flo

Condensed Consolidated Cash Flow Statements (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Cash flows from operating activities:
Net income	$ 25,178	$ 2,570
Adjustments to reconcile net income to net cash used for operating activities:
Depreciation and amortization	37,001	36,519
Share-based compensation	2,216	3,126
Loss on debt extinguishment	0	19,960
Changes in operating assets and liabilities, net of the effects of currency exchange rate changes and acquired businesses:
Receivables	61,388	18,921
Inventories	(9,485)	(16,737)
Accounts payable	(97,450)	(90,662)
Accrued liabilities	(70,925)	(48,611)
Income taxes	609	(785)
Other assets	650	(10,602)
Other liabilities	4,758	2,441
Net cash used for operating activities	(46,060)	(83,860)
Cash flows from investing activities:
Capital expenditures	(23,595)	(15,900)
Cash used to acquire businesses, net of cash acquired	0	(76,084)
Proceeds from disposal of tangible assets	10	25
Proceeds from disposal of business	0	39,100
Net cash used for investing activities	(23,585)	(52,859)
Cash flows from financing activities:
Cash dividends paid	(10,725)	(10,790)
Withholding tax payments for share-based payment awards	(1,940)	(1,503)
Other	(70)	0
Payments under borrowing arrangements	0	(401,234)
Payments under share repurchase program	0	(75,270)
Debt issuance costs paid	0	(7,059)
Borrowings under credit arrangements	0	431,270
Net cash used for financing activities	(12,735)	(64,586)
Effect of foreign currency exchange rate changes on cash and cash equivalents	752	3,060
Decrease in cash and cash equivalents	(81,628)	(198,245)
Cash and cash equivalents, beginning of period	420,610	561,108
Cash and cash equivalents, end of period	$ 338,982	$ 362,863

Condensed Consolidated Stockhol

Condensed Consolidated Stockholders' Equity Statement (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Mandatory Convertible Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interest
Beginning balance (in shares) at Dec. 31, 2017		(52)	(50,335)			(8,316)
Beginning balance at Dec. 31, 2017	$ 1,434,866	$ 1	$ 503	$ 1,123,832	$ 833,610	$ (425,685)	$ (98,026)	$ 631
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of change in accounting principles	(29,041)				(29,041)
Net income (loss)	2,570				2,618			(48)
Other comprehensive income, net of tax	(31,392)						(31,408)	16
Exercise of stock options, net of tax withholding forfeitures	(361)			(352)		$ (9)
Exercise of stock options, net of tax withholding forfeitures (in shares)						7
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(1,142)			(1,242)		$ 100
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (in shares)						27
Share repurchase program	(75,270)					$ (75,270)
Share repurchase program (in shares)						(1,050)
Share-based compensation	3,126			3,126
Redemption of stockholders' rights agreement	(411)				(411)
Preferred stock dividends	(8,733)				(8,733)
Common stock dividends ($0.05 per share)	(2,066)				(2,066)
Ending balance (in shares) at Apr. 01, 2018		(52)	(50,335)			(9,332)
Ending balance at Apr. 01, 2018	1,292,146	$ 1	$ 503	1,125,364	795,977	$ (500,864)	(129,434)	599
Beginning balance (in shares) at Dec. 31, 2018		(52)	(50,335)			(10,939)
Beginning balance at Dec. 31, 2018	1,387,588	$ 1	$ 503	1,139,395	922,000	$ (599,845)	(74,907)	441
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	25,178				25,202			(24)
Other comprehensive income, net of tax	29,010						29,009	1
Exercise of stock options, net of tax withholding forfeitures	(38)			(54)		$ 16
Exercise of stock options, net of tax withholding forfeitures (in shares)						1
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(1,902)			(2,570)		$ 668
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (in shares)						58
Share-based compensation	2,216			2,216
Preferred stock dividends	(8,733)				(8,733)
Common stock dividends ($0.05 per share)	(1,990)				(1,990)
Ending balance (in shares) at Mar. 31, 2019		(52)	(50,335)			(10,880)
Ending balance at Mar. 31, 2019	$ 1,431,329	$ 1	$ 503	$ 1,138,987	$ 936,479	$ (599,161)	$ (45,898)	$ 418

Condensed Consolidated Stockh_2

Condensed Consolidated Stockholders' Equity Statement (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Statement of Stockholders' Equity [Abstract]
Dividends declared per share (in usd per share)	$ 0.05	$ 0.05

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying Condensed Consolidated Financial Statements include Belden Inc. and all of its subsidiaries (the Company, us, we, or our). We eliminate all significant affiliate accounts and transactions in consolidation. The accompanying Condensed Consolidated Financial Statements presented as of any date other than December 31, 2018 : • Are prepared from the books and records without audit, and • Are prepared in accordance with the instructions for Form 10-Q and do not include all of the information required by accounting principles generally accepted in the United States for complete statements, but • Include all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the financial statements. These Condensed Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and Supplementary Data contained in our 2018 Annual Report on Form 10-K. Business Description We are a signal transmission solutions provider built around two global business platforms – Enterprise Solutions and Industrial Solutions. Our comprehensive portfolio of signal transmission solutions provides industry leading secure and reliable transmission of data, sound, and video for mission critical applications. Reporting Periods Our fiscal year and fiscal fourth quarter both end on December 31. Our fiscal first quarter ends on the Sunday falling closest to 91 days after December 31, which was March 31, 2019 , the 90th day of our fiscal year 2019 . Our fiscal second and third quarters each have 91 days. The three months ended April 1, 2018 included 91 days. Fair Value Measurement Accounting guidance for fair value measurements specifies a hierarchy of valuation techniques based upon whether the inputs to those valuation techniques reflect assumptions other market participants would use based upon market data obtained from independent sources or reflect our own assumptions of market participant valuation. The hierarchy is broken down into three levels based on the reliability of the inputs as follows: • Level 1 – Quoted prices in active markets that are unadjusted and accessible at the measurement date for identical, unrestricted assets or liabilities; • Level 2 – Quoted prices for identical assets and liabilities in markets that are not active, quoted prices for similar assets and liabilities in active markets, or financial instruments for which significant inputs are observable, either directly or indirectly; and • Level 3 – Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable. As of and during the three months ended March 31, 2019 and April 1, 2018 , we utilized Level 1 inputs to determine the fair value of cash equivalents, and we utilized Level 2 and Level 3 inputs to determine the fair value of net assets acquired in business combinations (see Note 3). We did not have any transfers between Level 1 and Level 2 fair value measurements during the three months ended March 31, 2019 and April 1, 2018 . Cash and Cash Equivalents We classify cash on hand and deposits in banks, including commercial paper, money market accounts, and other investments with an original maturity of three months or less, that we hold from time to time, as cash and cash equivalents. We periodically have cash equivalents consisting of short-term money market funds and other investments. As of March 31, 2019 , we did not have any such cash equivalents on hand. The primary objective of our investment activities is to preserve our capital for the purpose of funding operations. We do not enter into investments for trading or speculative purposes. Contingent Liabilities We have established liabilities for environmental and legal contingencies that are probable of occurrence and reasonably estimable, the amounts of which are currently not material. We accrue environmental remediation costs based on estimates of known environmental remediation exposures developed in consultation with our environmental consultants and legal counsel. We are, from time to time, subject to routine litigation incidental to our business. These lawsuits primarily involve claims for damages arising out of the use of our products, allegations of patent or trademark infringement, and litigation and administrative proceedings involving employment matters and commercial disputes. Based on facts currently available, we believe the disposition of the claims that are pending or asserted will not have a materially adverse effect on our financial position, results of operations, or cash flow. As of March 31, 2019 , we were party to standby letters of credit, bank guaranties, and surety bonds totaling $7.3 million , $3.6 million , and $3.3 million , respectively. Revenue Recognition We recognize revenue consistent with the principles as outlined in the following five step model: (1) identify the contract with the customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) each performance obligation is satisfied. See Note 2. Subsequent Events We evaluated subsequent events after the balance sheet date through the financial statement issuance date for appropriate accounting and disclosure. See Note 16. Current-Year Adoption of Accounting Pronouncements In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases ("ASU 2016-02"), a leasing standard for both lessees and lessors that supersedes the lease requirements in Accounting Standards Codification (ASC) Topic 840, " Leases ." Under its core principle, a lessee will recognize a right-of-use (ROU) asset and lease liability on the balance sheet for nearly all leased assets, and additional disclosures are required to enable users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. Lessor accounting remains largely consistent with existing U.S. generally accepted accounting principles. We adopted ASU 2016-02 on January 1, 2019 using the newly permitted transition method issued in July 2018, under ASU No. 2018-11 (“ASU 2018-11”), Leases: Targeted Improvements , which provides an additional (and optional) transition method for adopting the new lease standard. Furthermore, we elected the following practical expedients and accounting policy elections upon adoption: (i) the package of practical expedients as defined in ASU 2016-02, (ii) the short-term lease accounting policy election, (iii) the practical expedient to not separate non-lease components from lease components, and (iv) the easement practical expedient, which permits an entity to continue applying its current policy for accounting for land easements that existed as of the effective date of ASU 2016-02. The adoption of ASU 2016-02 on January 1, 2019 resulted in the recognition of right-of-use assets of approximately $90.5 million and lease liabilities for operating leases of approximately $103.4 million on the Condensed Consolidated Balance Sheet, with no material impact to the Condensed Consolidated Statements of Operations or Condensed Consolidated Cash Flow Statement. The difference between the initial lease liabilities and the ROU assets is related primarily to previously existing lease liabilities. See Note 7 for further information regarding the impact of the adoption of ASU 2016-02 on the Company's financial statements. In August 2017, the FASB issued Accounting Standards Update No. ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities ("ASU 2017-12"). The new guidance better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The new guidance also makes certain targeted improvements to simplify the application of hedge accounting guidance and ease the administrative burden of hedge documentation requirements and assessing hedge effectiveness. The standard is effective for fiscal years beginning after December 15, 2018. We adopted ASU 2017-12 effective January 1, 2019. The adoption had no impact on our results of operations. In February 2018, the FASB issued ASU No. 2018-02 (“ASU 2018-02”), Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . ASU 2018-02 provides an option to allow reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017. The new guidance is effective for annual and interim periods beginning after December 15, 2018. We adopted ASU 2018-02 effective January 1, 2019, and elected to not reclassify the income tax effects of the Act from accumulated other comprehensive income to retained earnings. The adoption had no impact on our results of operations. In June 2018, the FASB issued ASU No. 2018-07 (“ASU 2018-07”), Improvements to Nonemployee Share-Based Payment Accounting . The amendments in ASU 2018-07 expand the scope of Topic 718, Compensation - Stock Compensation, to include share-based payment transactions for acquiring goods and services from non-employees, and provide that non-employee share-based payment awards be measured at their grant-date fair value and the probability of satisfying performance conditions be taken into account when non-employee share-based payment awards contain such conditions. The standard is effective for fiscal years beginning after December 15, 2018. We adopted ASU 2018-07 effective January 1, 2019. The adoption had no impact on our results of operations. In August 2018, the Securities and Exchange Commission (“SEC”) adopted the final rule under SEC Release No. 33-10532, Disclosure Update and Simplification , amending certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. Additionally, the amendments expanded the disclosure requirements on the analysis of stockholders' equity for interim financial statements. Under the amendments, an analysis of changes in each caption of stockholders' equity presented in the balance sheet must be provided in a note or separate statement. The analysis should present a reconciliation of the beginning balance to the ending balance of each period presented. This final rule was effective on November 5, 2018. We implemented SEC Release No. 33-10532 effective January 1, 2019, which had no impact on our results of operations. Pending Adoption of Recent Accounting Pronouncements In June 2016, the FASB issued Accounting Standards Update No. 2016-13 (“ASU 2016-13”), Financial Instruments - Credit Losses

Revenues

Revenues	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenues	Revenues Revenues are recognized when control of the promised goods or services is transferred to our customers and in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. Taxes collected from customers and remitted to governmental authorities are not included in our revenues. The following tables present our revenues disaggregated by major product category. Cable & Connectivity Networking, Software & Security Total Revenues Three Months Ended March 31, 2019 (In thousands) Enterprise Solutions $ 233,671 $ 92,856 $ 326,527 Industrial Solutions 158,508 102,140 260,648 Total $ 392,179 $ 194,996 $ 587,175 Three Months Ended April 1, 2018 Enterprise Solutions $ 234,467 $ 114,657 $ 349,124 Industrial Solutions 162,730 93,711 256,441 Total $ 397,197 $ 208,368 $ 605,565 The following tables present our revenues disaggregated by geography, based on the location of the customer purchasing the product. Americas EMEA APAC Total Revenues Three Months Ended March 31, 2019 (In thousands) Enterprise Solutions $ 211,264 $ 67,320 $ 47,943 $ 326,527 Industrial Solutions 152,574 73,315 34,759 260,648 Total $ 363,838 $ 140,635 $ 82,702 $ 587,175 Three Months Ended April 1, 2018 Enterprise Solutions $ 225,279 $ 73,329 $ 50,516 $ 349,124 Industrial Solutions 149,812 72,592 34,037 256,441 Total $ 375,091 $ 145,921 $ 84,553 $ 605,565 The following tables present our revenues disaggregated by products, including software products, and support and services. Products Support & Services Total Revenues Three Months Ended March 31, 2019 (In thousands) Enterprise Solutions $ 307,859 $ 18,668 $ 326,527 Industrial Solutions 238,704 21,944 260,648 Total $ 546,563 $ 40,612 $ 587,175 Three Months Ended April 1, 2018 Enterprise Solutions $ 332,737 $ 16,387 $ 349,124 Industrial Solutions 232,061 24,380 256,441 Total $ 564,798 $ 40,767 $ 605,565 We generate revenues primarily by selling products that provide secure and reliable transmission of data, sound, and video for mission critical applications. We also generate revenues from providing support and professional services. We sell our products to distributors, end-users, installers, and directly to original equipment manufacturers. At times, we enter into arrangements that involve the delivery of multiple performance obligations. For these arrangements, revenue is allocated to each performance obligation based on its relative selling price and recognized when or as each performance obligation is satisfied. Most of our performance obligations related to the sale of products are satisfied at a point in time when control of the product is transferred based on the shipping terms of the arrangement. Generally, we determine relative selling price using the prices charged to customers on a standalone basis. The amount of consideration we receive and revenue we recognize varies due to rebates, returns, and price adjustments. We estimate the expected rebates, returns, and price adjustments based on an analysis of historical experience, anticipated sales demand, and trends in product pricing. We adjust our estimate of revenue at the earlier of when the most likely amount of consideration we expect to receive changes or when the consideration becomes fixed. Adjustments to revenue for performance obligations satisfied in prior periods was not significant during the three months ended March 31, 2019 . Accrued rebates and accrued returns as of March 31, 2019 totaled $17.7 million and $11.7 million , respectively. Estimated price adjustments recognized against our gross accounts receivable balance as of March 31, 2019 totaled $25.8 million . Depending on the terms of an arrangement, we may defer the recognition of a portion of the consideration received because we have to satisfy a future obligation. Consideration allocated to support services under a support and maintenance contract is typically paid in advance and recognized ratably over the term of the service. Consideration allocated to professional services is recognized when or as the services are performed depending on the terms of the arrangement. As of January 1, 2019, total deferred revenue was $113.3 million , and during the three months ended March 31, 2019, $47.8 million of revenue was deferred, `and $53.3 million of revenue was recognized. As of March 31, 2019 , total deferred revenue was $107.8 million , and of this amount, $92.5 million will be recognized within the next twelve months, and the remaining $15.3 million is long-term and will be recognized over a period greater than twelve months. We expense sales commissions as incurred when the duration of the related revenue arrangement is one year or less. We capitalize sales commissions in other current and long-lived assets on our balance sheet when the duration of the related revenue arrangement is longer than one year, and we amortize it over the related revenue arrangement period. Total capitalized sales commissions was $3.4 million as of March 31, 2019 . Total sales commissions costs were $5.6 million during the three months ended March 31, 2019

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2019
Business Combinations [Abstract]
Acquisitions	Acquisitions Net-Tech Technology, Inc. We acquired 100% of the shares of Net-Tech Technology, Inc. (NT2) on April 25, 2018 for a purchase price of $8.5 million that was funded with cash on hand. NT2 is an integrator of optical passive components and network optimization products used within broadband network applications where optical backhaul is used. NT2 is located in the United States. The results of NT2 have been included in our Consolidated Financial Statements from April 25, 2018, and are reported within the Enterprise Solutions segment. The NT2 acquisition was not material to our financial position or results of operations. Snell Advanced Media We acquired 100% of the outstanding ownership interest in Snell Advanced Media (SAM) on February 8, 2018 for a purchase price, net of cash acquired, of $104.5 million . Of the $104.5 million purchase price, $75.2 million was paid on February 8, 2018 and was funded with cash on hand. The acquisition included a potential earnout, which is based upon future combined earnings of SAM and Grass Valley through December 31, 2019. The maximum earnout consideration is $31.4 million , but based upon a third party valuation specialist using certain assumptions in a discounted cash flow model, the estimated fair value of the earnout included in the purchase price was $29.3 million . We assumed debt of $19.3 million and paid it off during the first quarter of 2018. During the first quarter of 2019, we signed a settlement agreement with the sellers of SAM for claims arising over the timing of the earnout consideration outlined in the purchase agreement, and as part of the settlement, the parties agreed that the maximum earnout consideration of $31.4 million would be payable during the first quarter 2020, unless earlier payment is required as per the terms of the purchase agreement. SAM designs, manufactures, and sells innovative content production and distribution systems for the broadcast and media markets. SAM is located in the United Kingdom. The results of SAM have been included in our Consolidated Financial Statements from February 8, 2018, and are reported within the Enterprise Solutions segment. The following table summarizes the estimated fair value of the assets acquired and the liabilities assumed as of February 8, 2018 (in thousands): Receivables $ 16,551 Inventory 15,084 Prepaid and other current assets 3,799 Property, plant, and equipment 7,716 Intangible assets 51,000 Goodwill 103,466 Deferred income taxes 1,388 Other long-lived assets 3,046 Total assets acquired $ 202,050 Accounts payable $ 11,825 Accrued liabilities 25,135 Deferred revenue 8,860 Long-term debt 19,315 Postretirement benefits 31,774 Other long-term liabilities 591 Total liabilities assumed $ 97,500 Net assets $ 104,550 During the first quarter 2019, we did not record any significant measurement-period adjustments. A single estimate of fair value results from a complex series of judgments about future events and uncertainties and relies heavily on estimates and assumptions. The judgments we have used in estimating the fair values assigned to each class of acquired assets and assumed liabilities could materially affect the results of our operations. The fair value of acquired receivables is $16.6 million , which is equivalent to its gross contractual amount. For purposes of the above allocation, we based our estimate of the fair values for the acquired inventory; property, plant, and equipment; intangible assets; and deferred revenue on valuation studies performed by a third party valuation firm. We have estimated a fair value adjustment for inventories based on the estimated selling price of the work-in-process and finished goods acquired at the closing date less the sum of the costs to complete the work-in-process, the costs of disposal, and a reasonable profit allowance for our post acquisition selling efforts. To determine the value of the acquired property, plant, and equipment, we used various valuation methods, including both the market approach, which considers sales prices of similar assets in similar conditions (Level 2 valuation), and the cost approach, which considers the cost to replace the asset adjusted for depreciation (Level 3 valuation). We used various valuation methods including discounted cash flows, lost income, excess earnings, and relief from royalty to estimate the fair value of the identifiable intangible assets and deferred revenue (Level 3 valuation). Goodwill and other intangible assets reflected above were determined to meet the criteria for recognition apart from tangible assets acquired and liabilities assumed. The goodwill is primarily attributable to expected synergies and the assembled workforce. The expected synergies for the SAM acquisition may be gained from helping broadcast and media content creators, aggregators and distributors significantly improve their effectiveness and efficiency during a period of rapid change in technology, viewer and advertiser behavior and business models. Our tax basis in the acquired goodwill is zero . The intangible assets related to the acquisition consisted of the following: Fair Value Amortization Period (In thousands) (In years) Intangible assets subject to amortization: Developed technologies $ 36,500 5.0 Customer relationships 11,000 12.0 Sales backlog 1,900 0.3 Trademarks 1,600 0.9 Total intangible assets subject to amortization $ 51,000 Intangible assets not subject to amortization: Goodwill $ 103,466 n/a Total intangible assets not subject to amortization $ 103,466 Total intangible assets $ 154,466 Weighted average amortization period 6.2 years The amortizable intangible assets reflected in the table above were determined by us to have finite lives. The useful life for the developed technology intangible asset was based on the estimated time that the technology provides us with a competitive advantage and thus approximates the period and pattern of consumption of the intangible asset. The useful life for the customer relationship intangible asset was based on our forecasts of estimated sales from recurring customers. The useful life of the backlog intangible asset was based on our estimate of when the ordered items would ship. The useful life for the trademarks was based on the period of time we expect to continue to go to market using the trademarks. Our consolidated revenues and consolidated income before taxes for the three months ended April 1, 2018 included $20.8 million and $(2.8) million , respectively, from SAM. The loss before taxes from SAM included $2.2 million of amortization of intangible assets and $0.5 million of cost of sales related to the adjustment of acquired inventory to fair value. The following table illustrates the unaudited pro forma effect on operating results as if the SAM acquisition had been completed as of January 1, 2017. Three Months Ended April 1, 2018 (In thousands, except per share data) (Unaudited) Revenues $ 614,184 Net loss attributable to Belden common stockholders (1,072 ) Diluted loss per share attributable to Belden common stockholders $ (0.03 )

Operating Segments

Operating Segments	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Operating Segments	Reportable Segments We are organized around two global business platforms: Enterprise Solutions and Industrial Solutions. Each of the global business platforms represents a reportable segment. The key measures of segment profit or loss reviewed by our chief operating decision maker are Segment Revenues and Segment EBITDA. Segment Revenues represent non-affiliate revenues and include revenues that would have otherwise been recorded by acquired businesses as independent entities but were not recognized in our Condensed Consolidated Statements of Operations and Comprehensive Income due to the effects of purchase accounting and the associated write-down of acquired deferred revenue to fair value. Segment EBITDA excludes certain items, including depreciation expense; amortization of intangibles; asset impairment; severance, restructuring, and acquisition integration costs; purchase accounting effects related to acquisitions, such as the adjustment of acquired inventory and deferred revenue to fair value; and other costs. We allocate corporate expenses to the segments for purposes of measuring Segment EBITDA. Corporate expenses are allocated on the basis of each segment’s relative EBITDA prior to the allocation. Our measure of segment assets does not include cash, goodwill, intangible assets, deferred tax assets, or corporate assets. All goodwill is allocated to reporting units of our segments for purposes of impairment testing. Enterprise Solutions Industrial Solutions Total Segments (In thousands) As of and for the three months ended March 31, 2019 Segment revenues $ 326,527 $ 260,648 $ 587,175 Affiliate revenues 1,369 17 1,386 Segment EBITDA 39,558 47,459 87,017 Depreciation expense 7,734 4,989 12,723 Amortization of intangibles 10,170 13,171 23,341 Amortization of software development intangible assets 914 23 937 Severance, restructuring, and acquisition integration costs 3,775 — 3,775 Purchase accounting effects of acquisitions 1,313 — 1,313 Segment assets 782,517 477,206 1,259,723 As of and for the three months ended April 1, 2018 Segment revenues $ 350,990 $ 256,433 $ 607,423 Affiliate revenues 846 29 875 Segment EBITDA 57,452 46,426 103,878 Depreciation expense 7,220 4,645 11,865 Amortization of intangibles 11,170 13,248 24,418 Amortization of software development intangible assets 236 — 236 Severance, restructuring, and acquisition integration costs 14,534 5,860 20,394 Purchase accounting effects of acquisitions 502 — 502 Deferred revenue adjustments 1,858 — 1,858 Segment assets 747,971 432,473 1,180,444 The following table is a reconciliation of the total of the reportable segments’ Revenues and EBITDA to consolidated revenues and consolidated income before taxes, respectively. Three Months Ended March 31, 2019 April 1, 2018 (In thousands) Total Segment Revenues $ 587,175 $ 607,423 Deferred revenue adjustments (1) — (1,858 ) Consolidated Revenues $ 587,175 $ 605,565 Total Segment EBITDA $ 87,017 $ 103,878 Amortization of intangibles (23,341 ) (24,418 ) Depreciation expense (12,723 ) (11,865 ) Severance, restructuring, and acquisition integration costs (2) (3,775 ) (20,394 ) Purchase accounting effects related to acquisitions (3) (1,313 ) (502 ) Amortization of software development intangible assets (937 ) (236 ) Deferred revenue adjustments (1) — (1,858 ) Loss on sale of assets — (94 ) Eliminations (483 ) (308 ) Consolidated operating income 44,445 44,203 Interest expense, net (14,193 ) (16,978 ) Non-operating pension benefit (cost) 547 (275 ) Loss on debt extinguishment — (19,960 ) Consolidated income before taxes $ 30,799 $ 6,990 (1) Our segment results include revenues that would have been recorded by acquired businesses had they remained as independent entities. Our consolidated results do not include these revenues due to the purchase accounting effect of recording deferred revenue at fair value. See Note 3, Acquisitions , for details. (2) See Note 9, Severance, Restructuring, and Acquisition Integration Activities, for details . (3) For the three months ended March 31, 2019, we recognized $1.3 million in selling, general and administrative expenses related to the earnout consideration for the SAM acquisition. For the three months ended April 1, 2018

Income per Share

Income per Share	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Income per Share	Income per Share The following table presents the basis for the income per share computations: Three Months Ended March 31, 2019 April 1, 2018 (In thousands) Numerator: Net income $ 25,178 $ 2,570 Less: Net loss attributable to noncontrolling interest (24 ) (48 ) Less: Preferred stock dividends 8,733 8,733 Net income (loss) attributable to Belden common stockholders $ 16,469 $ (6,115 ) Denominator: Weighted average shares outstanding, basic 39,420 41,633 Effect of dilutive common stock equivalents 240 — Weighted average shares outstanding, diluted 39,660 41,633 For the three months ended March 31, 2019 and April 1, 2018 , diluted weighted average shares outstanding do not include outstanding equity awards of 1.0 million and 0.5 million , respectively, because to do so would have been anti-dilutive. In addition, for the three months ended March 31, 2019 and April 1, 2018 , diluted weighted average shares outstanding do not include outstanding equity awards of 0.3 million and 0.2 million , respectively, because the related performance conditions have not been satisfied. Furthermore, for both the three months ended March 31, 2019 and April 1, 2018 , diluted weighted average shares outstanding do not include the impact of preferred shares that are convertible into 6.9 million common shares, because deducting the preferred stock dividends from net income was more dilutive. For purposes of calculating basic earnings per share, unvested restricted stock units are not included in the calculation of basic weighted average shares outstanding until all necessary conditions have been satisfied and issuance of the shares underlying the restricted stock units is no longer contingent. Necessary conditions are not satisfied until the vesting date, at which time holders of our restricted stock units receive shares of our common stock. For purposes of calculating diluted earnings per share, unvested restricted stock units are included to the extent that they are dilutive. In determining whether unvested restricted stock units are dilutive, each issuance of restricted stock units is considered separately.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2019
Inventory Disclosure [Abstract]
Inventories	Inventories The major classes of inventories were as follows: March 31, 2019 December 31, 2018 (In thousands) Raw materials $ 140,162 $ 146,803 Work-in-process 50,560 45,939 Finished goods 166,584 152,572 Gross inventories 357,306 345,314 Excess and obsolete reserves (30,536 ) (28,896 ) Net inventories $ 326,770 $ 316,418

Leases

Leases	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Leases	Leases We have operating and finance leases for properties, including manufacturing facilities, warehouses, and office space; as well as vehicles and certain equipment. We make certain judgments in determining whether a contract contains a lease in accordance with ASU 2016-02. Our leases have remaining lease terms of less than 1 year to 16 years , some of which include options to extend the lease for a period of up to 15 years and some include options to terminate the leases within 1 year. We do not assume renewals in our determination of the lease term unless the renewals are deemed to be reasonably certain as of the commencement date of the lease. Our lease agreements do not contain any material residual value guarantees or material variable lease payments. We have entered into various short-term operating leases with an initial term of twelve months or less. These leases are not recorded on our balance sheet, and for the three months ended March 31, 2019, the rent expense for short-term leases was not material. We have certain property and equipment lease contracts that may contain lease and non-lease components, and have elected to utilize the practical expedient to account for these components together as a single combined lease component. As the rate implicit in each lease is not readily determinable, we use the incremental borrowing rate to determine the present value of the lease payments, which is unique to each leased asset, and is based upon the term of the lease, commencement date of the lease, local currency of the leased asset, and the credit rating of the legal entity leasing the asset. The components of lease expense were as follows: Three Months Ended March 31, 2019 (In thousands) Operating lease cost $ 4,873 Finance lease cost Amortization of right-of-use asset $ 26 Interest on lease liabilities 4 Total finance lease cost $ 30 Supplemental cash flow information related to leases was as follows: Three Months Ended March 31, 2019 (In thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 5,088 Operating cash flows from finance leases 9 Financing cash flows from finance leases 70 Supplemental balance sheet information related to leases was as follows: March 31, 2019 (In thousands, except lease term and discount rate) Operating leases: Total operating lease right-of-use assets $ 85,327 Accrued liabilities $ 17,923 Long-term operating lease liabilities 79,091 Total operating lease liabilities $ 97,014 Finance leases: Other long-lived assets, at cost $ 848 Accumulated depreciation (443 ) Other long-lived assets, net $ 405 Weighted Average Remaining Lease Term Operating leases 7 years Finance leases 3 years Weighted Average Discount Rate Operating leases 6.9 % Finance leases 6.2 % Maturities of lease liabilities were as follows: Operating Leases Finance Leases (In thousands) 2019 $ 20,175 $ 288 2020 21,797 183 2021 18,366 68 2022 15,054 37 2023 13,053 14 Thereafter 41,508 1 Total $ 129,953 $ 591
Leases	Leases We have operating and finance leases for properties, including manufacturing facilities, warehouses, and office space; as well as vehicles and certain equipment. We make certain judgments in determining whether a contract contains a lease in accordance with ASU 2016-02. Our leases have remaining lease terms of less than 1 year to 16 years , some of which include options to extend the lease for a period of up to 15 years and some include options to terminate the leases within 1 year. We do not assume renewals in our determination of the lease term unless the renewals are deemed to be reasonably certain as of the commencement date of the lease. Our lease agreements do not contain any material residual value guarantees or material variable lease payments. We have entered into various short-term operating leases with an initial term of twelve months or less. These leases are not recorded on our balance sheet, and for the three months ended March 31, 2019, the rent expense for short-term leases was not material. We have certain property and equipment lease contracts that may contain lease and non-lease components, and have elected to utilize the practical expedient to account for these components together as a single combined lease component. As the rate implicit in each lease is not readily determinable, we use the incremental borrowing rate to determine the present value of the lease payments, which is unique to each leased asset, and is based upon the term of the lease, commencement date of the lease, local currency of the leased asset, and the credit rating of the legal entity leasing the asset. The components of lease expense were as follows: Three Months Ended March 31, 2019 (In thousands) Operating lease cost $ 4,873 Finance lease cost Amortization of right-of-use asset $ 26 Interest on lease liabilities 4 Total finance lease cost $ 30 Supplemental cash flow information related to leases was as follows: Three Months Ended March 31, 2019 (In thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 5,088 Operating cash flows from finance leases 9 Financing cash flows from finance leases 70 Supplemental balance sheet information related to leases was as follows: March 31, 2019 (In thousands, except lease term and discount rate) Operating leases: Total operating lease right-of-use assets $ 85,327 Accrued liabilities $ 17,923 Long-term operating lease liabilities 79,091 Total operating lease liabilities $ 97,014 Finance leases: Other long-lived assets, at cost $ 848 Accumulated depreciation (443 ) Other long-lived assets, net $ 405 Weighted Average Remaining Lease Term Operating leases 7 years Finance leases 3 years Weighted Average Discount Rate Operating leases 6.9 % Finance leases 6.2 % Maturities of lease liabilities were as follows: Operating Leases Finance Leases (In thousands) 2019 $ 20,175 $ 288 2020 21,797 183 2021 18,366 68 2022 15,054 37 2023 13,053 14 Thereafter 41,508 1 Total $ 129,953 $ 591

Long-Lived Assets

Long-Lived Assets	3 Months Ended
	Mar. 31, 2019
Property, Plant and Equipment [Abstract]
Long-Lived Assets	Long-Lived Assets Depreciation and Amortization Expense We recognized depreciation expense of $12.7 million and $11.9 million in the three months ended March 31, 2019 and April 1, 2018 , respectively. We recognized amortization expense related to our intangible assets of $24.3 million and $24.6 million in the three months ended March 31, 2019 and April 1, 2018

Severance, Restructuring, and A

Severance, Restructuring, and Acquisition Integration Activities	3 Months Ended
	Mar. 31, 2019
Restructuring and Related Activities [Abstract]
Severance, Restructuring, and Acquisition Integration Activities	Severance, Restructuring, and Acquisition Integration Activities Grass Valley and SAM Integration Program: 2018 - 2019 In 2018, we began a restructuring program to integrate SAM with Grass Valley. The restructuring and integration activities are focused on achieving desired cost savings by consolidating existing and acquired facilities and other support functions. We recognized $3.0 million and $9.2 million of severance and other restructuring costs for this program during the three months ended March 31, 2019 and April 1, 2018, respectively. The costs were incurred by the Enterprise Solutions segment. We do not expect to incur any more costs for this program. Industrial Manufacturing Footprint Program: 2016 - 2018 In 2016, we began a program to consolidate our manufacturing footprint. The manufacturing consolidation was complete as of December 31, 2018. We recognized $7.5 million of severance and other restructuring costs for this program during the three months ended April 1, 2018. The costs were incurred by the Enterprise Solutions and Industrial Solutions segments, as the manufacturing locations involved in the program serve both platforms. The following table summarizes the costs by segment of the various programs described above as well as other immaterial programs and acquisition integration activities: Severance Other Restructuring and Integration Costs Total Costs Three Months Ended March 31, 2019 (In thousands) Enterprise Solutions $ 220 $ 3,555 $ 3,775 Industrial Solutions — — — Total $ 220 $ 3,555 $ 3,775 Three Months Ended April 1, 2018 Enterprise Solutions $ 508 $ 14,026 $ 14,534 Industrial Solutions 52 5,808 5,860 Total $ 560 $ 19,834 $ 20,394 Of the total severance, restructuring, and acquisition integration costs recognized in the three months ended March 31, 2019 , $0.6 million , $2.8 million , and $0.4 million were included in cost of sales; selling, general and administrative expenses; and research and development expenses, respectively. Of the total severance, restructuring, and acquisition integration costs recognized in the three months ended April 1, 2018 , $9.4 million , $9.4 million , and $1.6 million were included in cost of sales; selling, general and administrative expenses; and research and development expenses, respectively. The other restructuring and integration costs primarily consisted of equipment transfer, costs to consolidate operating and support facilities, retention bonuses, relocation, travel, legal, and other costs. The majority of the other restructuring and integration costs related to these actions were paid as incurred or are payable within the next 60 days . There were no significant severance accrual balances as of March 31, 2019 or December 31, 2018

Long-Term Debt and Other Borrow

Long-Term Debt and Other Borrowing Arrangements	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Long-Term Debt and Other Borrowing Arrangements	Long-Term Debt and Other Borrowing Arrangements The carrying values of our long-term debt were as follows: March 31, 2019 December 31, 2018 (In thousands) Revolving credit agreement due 2022 $ — $ — Senior subordinated notes: 3.875% Senior subordinated notes due 2028 393,750 400,050 3.375% Senior subordinated notes due 2027 506,250 514,350 4.125% Senior subordinated notes due 2026 225,000 228,600 2.875% Senior subordinated notes due 2025 337,500 342,900 Total senior subordinated notes 1,462,500 1,485,900 Less unamortized debt issuance costs (22,008 ) (22,700 ) Long-term debt $ 1,440,492 $ 1,463,200 Revolving Credit Agreement due 2022 Our Revolving Credit Agreement provides a $400.0 million multi-currency asset-based revolving credit facility (the Revolver). The borrowing base under the Revolver includes eligible accounts receivable; inventory; and property, plant and equipment of certain of our subsidiaries in the U.S., Canada, Germany, and the Netherlands. The maturity date of the Revolver is May 16, 2022. Interest on outstanding borrowings is variable, based upon LIBOR or other similar indices in foreign jurisdictions, plus a spread that ranges from 1.25% - 1.75% , depending upon our leverage position. We pay a commitment fee on our available borrowing capacity of 0.25% . In the event we borrow more than 90% of our borrowing base, we are subject to a fixed charge coverage ratio covenant. As of March 31, 2019 , we had no borrowings outstanding on the Revolver, and our available borrowing capacity was $345.5 million . Senior Subordinated Notes We have outstanding €350.0 million aggregate principal amount of 3.875% senior subordinated notes due 2028 (the 2028 Notes). The carrying value of the 2028 Notes as of March 31, 2019 is $393.8 million . The 2028 Notes are guaranteed on a senior subordinated basis by our current and future domestic subsidiaries. The 2028 Notes rank equal in right of payment with our senior subordinated notes due 2027, 2026, and 2025 and with any future subordinated debt, and they are subordinated to all of our senior debt and the senior debt of our subsidiary guarantors, including our Revolver. Interest is payable semiannually on March 15 and September 15 of each year. We have outstanding €450.0 million aggregate principal amount of 3.375% senior subordinated notes due 2027 (the 2027 Notes). The carrying value of the 2027 Notes as of March 31, 2019 is $506.3 million . The 2027 Notes are guaranteed on a senior subordinated basis by our current and future domestic subsidiaries. The 2027 Notes rank equal in right of payment with our senior subordinated notes due 2028, 2026, and 2025 and with any future subordinated debt, and they are subordinated to all of our senior debt and the senior debt of our subsidiary guarantors, including our Revolver. Interest is payable semiannually on January 15 and July 15 of each year. We have outstanding €200.0 million aggregate principal amount of 4.125% senior subordinated notes due 2026 (the 2026 Notes). The carrying value of the 2026 Notes as of March 31, 2019 is $225.0 million . The 2026 Notes are guaranteed on a senior subordinated basis by our current and future domestic subsidiaries. The 2026 Notes rank equal in right of payment with our senior subordinated notes due 2028, 2027, and 2025 and with any future subordinated debt, and they are subordinated to all of our senior debt and the senior debt of our subsidiary guarantors, including our Revolver. Interest is payable semiannually on April 15 and October 15 of each year. We have outstanding €300.0 million aggregate principal amount of 2.875% senior subordinated notes due 2025 (the 2025 Notes). The carrying value of the 2025 Notes as of March 31, 2019 is $337.5 million . The 2025 Notes are guaranteed on a senior subordinated basis by our current and future domestic subsidiaries. The 2025 Notes rank equal in right of payment with our senior subordinated notes due 2028, 2027, and 2026 and with any future subordinated debt, and they are subordinated to all of our senior debt and the senior debt of our subsidiary guarantors, including our Revolver. Interest is payable semiannually on March 15 and September 15 of each year. Fair Value of Long-Term Debt The fair value of our senior subordinated notes as of March 31, 2019 was approximately $1,486.7 million based on quoted prices of the debt instruments in inactive markets (Level 2 valuation). This amount represents the fair value of our senior subordinated notes with a carrying value of $1,462.5 million as of March 31, 2019

Net Investment Hedge

Net Investment Hedge	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net Investment Hedge	Net Investment Hedge All of our euro denominated notes were issued by Belden Inc., a USD functional currency entity. As of March 31, 2019 , all of our outstanding foreign denominated debt is designated as a net investment hedge on the foreign currency risk of our net investment in our euro foreign operations. The objective of the hedge is to protect the net investment in the foreign operation against adverse changes in the euro exchange rate. The transaction gain or loss is reported in the cumulative translation adjustment section of other comprehensive income. The amount of the cumulative translation adjustment associated with these notes for the three month periods ended March 31, 2019 and April 1, 2018 was a gain of $23.6 million and a loss of $39.2 million

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We recognized income tax expense of $5.6 million for the three months ended March 31, 2019 , representing an effective tax rate of 18.3% . The effective tax rate was impacted by an income tax benefit of $0.8 million as a result of a change in our valuation allowance on foreign tax credits due to the restructuring of certain foreign operations. We recognized income tax expense of $4.4 million for the three months ended April 1, 2018 representing an effective tax rate of 63.2% . The effective tax rate was impacted by the following significant factors: • We recognized income tax expense of $1.8 million in the three months ended April 1, 2018 as a result of a change in our valuation allowance on foreign tax credits associated with our euro debt refinancing during the quarter. • We also recognized income tax expense of $0.5 million in the three months ended April 1, 2018 as a result of changes in our valuation allowance for the Tax Cuts and Jobs Act (the Act). On December 22, 2017, the Act was signed into law, making significant changes to the Internal Revenue Code. Changes include, but are not limited to, a corporate tax rate decrease from 35% to 21% effective for tax years beginning after December 31, 2017, the transition of U.S. international taxation from a worldwide tax system to a territorial tax system, and a one-time transition tax on the mandatory deemed repatriation of cumulative foreign earnings as of December 31, 2017. Also on December 22, 2017, Staff Accounting Bulletin No. 118 (“SAB 118”) was issued to address the application of US GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Act. During the three months ended April 1, 2018, we obtained additional information affecting the provisional amount initially recorded for the valuation allowance on certain foreign tax credits in 2017, and as a result, recorded an adjustment to the valuation allowance on certain foreign tax credits at such time.

Pension and Other Postretiremen

Pension and Other Postretirement Obligations	3 Months Ended
	Mar. 31, 2019
Retirement Benefits [Abstract]
Pension and Other Postretirement Obligations	Pension and Other Postretirement Obligations The following table provides the components of net periodic benefit costs for our pension and other postretirement benefit plans: Pension Obligations Other Postretirement Obligations Three Months Ended March 31, 2019 April 1, 2018 March 31, 2019 April 1, 2018 (In thousands) Service cost $ 1,058 $ 1,133 $ 10 $ 13 Interest cost 3,010 1,876 272 264 Expected return on plan assets (4,116 ) (2,520 ) — — Amortization of prior service credit (14 ) (10 ) — — Actuarial losses (gains) 327 665 (26 ) — Net periodic benefit cost $ 265 $ 1,144 $ 256 $ 277

Comprehensive Income and Accumu

Comprehensive Income and Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Comprehensive Income and Accumulated Other Comprehensive Income (Loss)	Comprehensive Income and Accumulated Other Comprehensive Income (Loss) The following table summarizes total comprehensive income (loss): Three Months Ended March 31, 2019 April 1, 2018 (In thousands) Net income $ 25,178 $ 2,570 Foreign currency translation gain (loss), net of $0.4 million and $0.5 million tax, respectively 28,791 (31,795 ) Adjustments to pension and postretirement liability, net of $0.1 million and $0.3 million tax, respectively 219 403 Total comprehensive income (loss) 54,188 (28,822 ) Less: Comprehensive loss attributable to noncontrolling interest (23 ) (32 ) Comprehensive income (loss) attributable to Belden $ 54,211 $ (28,790 ) The accumulated balances related to each component of other comprehensive income (loss), net of tax, are as follows: Foreign Currency Translation Component Pension and Other Postretirement Benefit Plans Accumulated Other Comprehensive Income (Loss) (In thousands) Balance at December 31, 2018 $ (41,882 ) $ (33,025 ) $ (74,907 ) Other comprehensive income attributable to Belden before reclassifications 28,790 — 28,790 Amounts reclassified from accumulated other comprehensive income — 219 219 Net current period other comprehensive gain attributable to Belden 28,790 219 29,009 Balance at March 31, 2019 $ (13,092 ) $ (32,806 ) $ (45,898 ) The following table summarizes the effects of reclassifications from accumulated other comprehensive income (loss) for the three months ended March 31, 2019 : Amount Reclassified from Accumulated Other Comprehensive Income Affected Line Item in the Consolidated Statements of Operations and Comprehensive Income (In thousands) Amortization of pension and other postretirement benefit plan items: Actuarial losses $ 301 (1) Prior service credit (14 ) (1) Total before tax 287 Tax benefit (68 ) Total net of tax $ 219

Preferred Stock

Preferred Stock	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Preferred Stock	Preferred Stock In 2016, we issued 5.2 million depositary shares, each of which represents 1/100th interest in a share of 6.75% Series B Mandatory Convertible Preferred Stock (the Preferred Stock), for an offering price of $100 per depositary share. Holders of the Preferred Stock may elect to convert their shares into common stock at any time prior to the mandatory conversion date. Unless earlier converted, each share of Preferred Stock will automatically convert into common stock on or around July 15, 2019 into between 120.46 and 132.50 shares of Belden common stock, subject to customary anti-dilution adjustments. This represents a range of 6.2 million to 6.9 million shares of Belden common stock to be issued upon conversion. The number of shares of Belden common stock issuable upon the mandatory conversion of the Preferred Stock will be determined based upon the volume-weighted average price of Belden’s common stock over the 20 day trading period beginning on, and including, the 22nd scheduled trading day prior to July 15, 2019. The net proceeds from this offering were approximately $501 million . The net proceeds are for general corporate purposes. With respect to dividend and liquidation rights, the Preferred Stock ranks senior to our common stock and junior to all of our existing and future indebtedness. During each of the three months ended March 31, 2019 and April 1, 2018 , dividends on the Preferred Stock were $8.7 million

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events We acquired 100% of the shares of Opterna International Corp. (Opterna) on April 15, 2019 for a purchase price of approximately $45 million , net of cash acquired. The acquisition also includes potential earnout consideration up to a maximum of $25 million

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying Condensed Consolidated Financial Statements include Belden Inc. and all of its subsidiaries (the Company, us, we, or our). We eliminate all significant affiliate accounts and transactions in consolidation. The accompanying Condensed Consolidated Financial Statements presented as of any date other than December 31, 2018 : • Are prepared from the books and records without audit, and • Are prepared in accordance with the instructions for Form 10-Q and do not include all of the information required by accounting principles generally accepted in the United States for complete statements, but • Include all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the financial statements.
Business Description	Business Description We are a signal transmission solutions provider built around two
Reporting Periods	Reporting Periods Our fiscal year and fiscal fourth quarter both end on December 31. Our fiscal first quarter ends on the Sunday falling closest to 91 days after December 31, which was March 31, 2019 , the 90th day of our fiscal year 2019 . Our fiscal second and third quarters each have 91 days. The three months ended April 1, 2018 included 91
Fair Value Measurement	Fair Value Measurement Accounting guidance for fair value measurements specifies a hierarchy of valuation techniques based upon whether the inputs to those valuation techniques reflect assumptions other market participants would use based upon market data obtained from independent sources or reflect our own assumptions of market participant valuation. The hierarchy is broken down into three levels based on the reliability of the inputs as follows: • Level 1 – Quoted prices in active markets that are unadjusted and accessible at the measurement date for identical, unrestricted assets or liabilities; • Level 2 – Quoted prices for identical assets and liabilities in markets that are not active, quoted prices for similar assets and liabilities in active markets, or financial instruments for which significant inputs are observable, either directly or indirectly; and • Level 3 – Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable. As of and during the three months ended March 31, 2019 and April 1, 2018
Cash and Cash Equivalents	Cash and Cash Equivalents We classify cash on hand and deposits in banks, including commercial paper, money market accounts, and other investments with an original maturity of three months or less, that we hold from time to time, as cash and cash equivalents. We periodically have cash equivalents consisting of short-term money market funds and other investments. As of March 31, 2019
Contingent Liabilities	Contingent LiabilitiesWe have established liabilities for environmental and legal contingencies that are probable of occurrence and reasonably estimable, the amounts of which are currently not material. We accrue environmental remediation costs based on estimates of known environmental remediation exposures developed in consultation with our environmental consultants and legal counsel. We are, from time to time, subject to routine litigation incidental to our business. These lawsuits primarily involve claims for damages arising out of the use of our products, allegations of patent or trademark infringement, and litigation and administrative proceedings involving employment matters and commercial disputes. Based on facts currently available, we believe the disposition of the claims that are pending or asserted will not have a materially adverse effect on our financial position, results of operations, or cash flow.
Revenue Recognition	Revenue Recognition We recognize revenue consistent with the principles as outlined in the following five step model: (1) identify the contract with the customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) each performance obligation is satisfied. See Note 2.
Subsequent Events	Subsequent EventsWe evaluated subsequent events after the balance sheet date through the financial statement issuance date for appropriate accounting and disclosure.
New Accounting Pronouncements	Current-Year Adoption of Accounting Pronouncements In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases ("ASU 2016-02"), a leasing standard for both lessees and lessors that supersedes the lease requirements in Accounting Standards Codification (ASC) Topic 840, " Leases ." Under its core principle, a lessee will recognize a right-of-use (ROU) asset and lease liability on the balance sheet for nearly all leased assets, and additional disclosures are required to enable users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. Lessor accounting remains largely consistent with existing U.S. generally accepted accounting principles. We adopted ASU 2016-02 on January 1, 2019 using the newly permitted transition method issued in July 2018, under ASU No. 2018-11 (“ASU 2018-11”), Leases: Targeted Improvements , which provides an additional (and optional) transition method for adopting the new lease standard. Furthermore, we elected the following practical expedients and accounting policy elections upon adoption: (i) the package of practical expedients as defined in ASU 2016-02, (ii) the short-term lease accounting policy election, (iii) the practical expedient to not separate non-lease components from lease components, and (iv) the easement practical expedient, which permits an entity to continue applying its current policy for accounting for land easements that existed as of the effective date of ASU 2016-02. The adoption of ASU 2016-02 on January 1, 2019 resulted in the recognition of right-of-use assets of approximately $90.5 million and lease liabilities for operating leases of approximately $103.4 million on the Condensed Consolidated Balance Sheet, with no material impact to the Condensed Consolidated Statements of Operations or Condensed Consolidated Cash Flow Statement. The difference between the initial lease liabilities and the ROU assets is related primarily to previously existing lease liabilities. See Note 7 for further information regarding the impact of the adoption of ASU 2016-02 on the Company's financial statements. In August 2017, the FASB issued Accounting Standards Update No. ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities ("ASU 2017-12"). The new guidance better aligns an entity’s risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The new guidance also makes certain targeted improvements to simplify the application of hedge accounting guidance and ease the administrative burden of hedge documentation requirements and assessing hedge effectiveness. The standard is effective for fiscal years beginning after December 15, 2018. We adopted ASU 2017-12 effective January 1, 2019. The adoption had no impact on our results of operations. In February 2018, the FASB issued ASU No. 2018-02 (“ASU 2018-02”), Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . ASU 2018-02 provides an option to allow reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017. The new guidance is effective for annual and interim periods beginning after December 15, 2018. We adopted ASU 2018-02 effective January 1, 2019, and elected to not reclassify the income tax effects of the Act from accumulated other comprehensive income to retained earnings. The adoption had no impact on our results of operations. In June 2018, the FASB issued ASU No. 2018-07 (“ASU 2018-07”), Improvements to Nonemployee Share-Based Payment Accounting . The amendments in ASU 2018-07 expand the scope of Topic 718, Compensation - Stock Compensation, to include share-based payment transactions for acquiring goods and services from non-employees, and provide that non-employee share-based payment awards be measured at their grant-date fair value and the probability of satisfying performance conditions be taken into account when non-employee share-based payment awards contain such conditions. The standard is effective for fiscal years beginning after December 15, 2018. We adopted ASU 2018-07 effective January 1, 2019. The adoption had no impact on our results of operations. In August 2018, the Securities and Exchange Commission (“SEC”) adopted the final rule under SEC Release No. 33-10532, Disclosure Update and Simplification

Revenues (Tables)

Revenues (Tables)	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following tables present our revenues disaggregated by major product category. Cable & Connectivity Networking, Software & Security Total Revenues Three Months Ended March 31, 2019 (In thousands) Enterprise Solutions $ 233,671 $ 92,856 $ 326,527 Industrial Solutions 158,508 102,140 260,648 Total $ 392,179 $ 194,996 $ 587,175 Three Months Ended April 1, 2018 Enterprise Solutions $ 234,467 $ 114,657 $ 349,124 Industrial Solutions 162,730 93,711 256,441 Total $ 397,197 $ 208,368 $ 605,565 The following tables present our revenues disaggregated by geography, based on the location of the customer purchasing the product. Americas EMEA APAC Total Revenues Three Months Ended March 31, 2019 (In thousands) Enterprise Solutions $ 211,264 $ 67,320 $ 47,943 $ 326,527 Industrial Solutions 152,574 73,315 34,759 260,648 Total $ 363,838 $ 140,635 $ 82,702 $ 587,175 Three Months Ended April 1, 2018 Enterprise Solutions $ 225,279 $ 73,329 $ 50,516 $ 349,124 Industrial Solutions 149,812 72,592 34,037 256,441 Total $ 375,091 $ 145,921 $ 84,553 $ 605,565 The following tables present our revenues disaggregated by products, including software products, and support and services. Products Support & Services Total Revenues Three Months Ended March 31, 2019 (In thousands) Enterprise Solutions $ 307,859 $ 18,668 $ 326,527 Industrial Solutions 238,704 21,944 260,648 Total $ 546,563 $ 40,612 $ 587,175 Three Months Ended April 1, 2018 Enterprise Solutions $ 332,737 $ 16,387 $ 349,124 Industrial Solutions 232,061 24,380 256,441 Total $ 564,798 $ 40,767 $ 605,565

Acquisitions (Tables)

Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2019
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the estimated fair value of the assets acquired and the liabilities assumed as of February 8, 2018 (in thousands): Receivables $ 16,551 Inventory 15,084 Prepaid and other current assets 3,799 Property, plant, and equipment 7,716 Intangible assets 51,000 Goodwill 103,466 Deferred income taxes 1,388 Other long-lived assets 3,046 Total assets acquired $ 202,050 Accounts payable $ 11,825 Accrued liabilities 25,135 Deferred revenue 8,860 Long-term debt 19,315 Postretirement benefits 31,774 Other long-term liabilities 591 Total liabilities assumed $ 97,500 Net assets $ 104,550
Schedule of Acquired Intangible Assets	The intangible assets related to the acquisition consisted of the following: Fair Value Amortization Period (In thousands) (In years) Intangible assets subject to amortization: Developed technologies $ 36,500 5.0 Customer relationships 11,000 12.0 Sales backlog 1,900 0.3 Trademarks 1,600 0.9 Total intangible assets subject to amortization $ 51,000 Intangible assets not subject to amortization: Goodwill $ 103,466 n/a Total intangible assets not subject to amortization $ 103,466 Total intangible assets $ 154,466 Weighted average amortization period 6.2 years
Schedule of Pro Forma Information	The following table illustrates the unaudited pro forma effect on operating results as if the SAM acquisition had been completed as of January 1, 2017. Three Months Ended April 1, 2018 (In thousands, except per share data) (Unaudited) Revenues $ 614,184 Net loss attributable to Belden common stockholders (1,072 ) Diluted loss per share attributable to Belden common stockholders $ (0.03 )

Operating Segments (Tables)

Operating Segments (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Operating Segment Information	Our measure of segment assets does not include cash, goodwill, intangible assets, deferred tax assets, or corporate assets. All goodwill is allocated to reporting units of our segments for purposes of impairment testing. Enterprise Solutions Industrial Solutions Total Segments (In thousands) As of and for the three months ended March 31, 2019 Segment revenues $ 326,527 $ 260,648 $ 587,175 Affiliate revenues 1,369 17 1,386 Segment EBITDA 39,558 47,459 87,017 Depreciation expense 7,734 4,989 12,723 Amortization of intangibles 10,170 13,171 23,341 Amortization of software development intangible assets 914 23 937 Severance, restructuring, and acquisition integration costs 3,775 — 3,775 Purchase accounting effects of acquisitions 1,313 — 1,313 Segment assets 782,517 477,206 1,259,723 As of and for the three months ended April 1, 2018 Segment revenues $ 350,990 $ 256,433 $ 607,423 Affiliate revenues 846 29 875 Segment EBITDA 57,452 46,426 103,878 Depreciation expense 7,220 4,645 11,865 Amortization of intangibles 11,170 13,248 24,418 Amortization of software development intangible assets 236 — 236 Severance, restructuring, and acquisition integration costs 14,534 5,860 20,394 Purchase accounting effects of acquisitions 502 — 502 Deferred revenue adjustments 1,858 — 1,858 Segment assets 747,971 432,473 1,180,444
Reconciliation of Total Reportable Segments' Revenues and EBITDA to Consolidated Revenues and Consolidated Income Before Taxes	The following table is a reconciliation of the total of the reportable segments’ Revenues and EBITDA to consolidated revenues and consolidated income before taxes, respectively. Three Months Ended March 31, 2019 April 1, 2018 (In thousands) Total Segment Revenues $ 587,175 $ 607,423 Deferred revenue adjustments (1) — (1,858 ) Consolidated Revenues $ 587,175 $ 605,565 Total Segment EBITDA $ 87,017 $ 103,878 Amortization of intangibles (23,341 ) (24,418 ) Depreciation expense (12,723 ) (11,865 ) Severance, restructuring, and acquisition integration costs (2) (3,775 ) (20,394 ) Purchase accounting effects related to acquisitions (3) (1,313 ) (502 ) Amortization of software development intangible assets (937 ) (236 ) Deferred revenue adjustments (1) — (1,858 ) Loss on sale of assets — (94 ) Eliminations (483 ) (308 ) Consolidated operating income 44,445 44,203 Interest expense, net (14,193 ) (16,978 ) Non-operating pension benefit (cost) 547 (275 ) Loss on debt extinguishment — (19,960 ) Consolidated income before taxes $ 30,799 $ 6,990 (1) Our segment results include revenues that would have been recorded by acquired businesses had they remained as independent entities. Our consolidated results do not include these revenues due to the purchase accounting effect of recording deferred revenue at fair value. See Note 3, Acquisitions , for details. (2) See Note 9, Severance, Restructuring, and Acquisition Integration Activities, for details . (3) For the three months ended March 31, 2019, we recognized $1.3 million in selling, general and administrative expenses related to the earnout consideration for the SAM acquisition. For the three months ended April 1, 2018

Income per Share (Tables)

Income per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Basis for Income Per Share Computations	The following table presents the basis for the income per share computations: Three Months Ended March 31, 2019 April 1, 2018 (In thousands) Numerator: Net income $ 25,178 $ 2,570 Less: Net loss attributable to noncontrolling interest (24 ) (48 ) Less: Preferred stock dividends 8,733 8,733 Net income (loss) attributable to Belden common stockholders $ 16,469 $ (6,115 ) Denominator: Weighted average shares outstanding, basic 39,420 41,633 Effect of dilutive common stock equivalents 240 — Weighted average shares outstanding, diluted 39,660 41,633

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2019
Inventory Disclosure [Abstract]
Major Classes of Inventories	The major classes of inventories were as follows: March 31, 2019 December 31, 2018 (In thousands) Raw materials $ 140,162 $ 146,803 Work-in-process 50,560 45,939 Finished goods 166,584 152,572 Gross inventories 357,306 345,314 Excess and obsolete reserves (30,536 ) (28,896 ) Net inventories $ 326,770 $ 316,418

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Components of Lease Expense	The components of lease expense were as follows: Three Months Ended March 31, 2019 (In thousands) Operating lease cost $ 4,873 Finance lease cost Amortization of right-of-use asset $ 26 Interest on lease liabilities 4 Total finance lease cost $ 30
Supplemental Cash Flow Information Related To Leases	Supplemental cash flow information related to leases was as follows: Three Months Ended March 31, 2019 (In thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 5,088 Operating cash flows from finance leases 9 Financing cash flows from finance leases 70
Supplemental Balance Sheet Information Related To Leases	Supplemental balance sheet information related to leases was as follows: March 31, 2019 (In thousands, except lease term and discount rate) Operating leases: Total operating lease right-of-use assets $ 85,327 Accrued liabilities $ 17,923 Long-term operating lease liabilities 79,091 Total operating lease liabilities $ 97,014 Finance leases: Other long-lived assets, at cost $ 848 Accumulated depreciation (443 ) Other long-lived assets, net $ 405
Supplemental Other Information Related To Leases	Weighted Average Remaining Lease Term Operating leases 7 years Finance leases 3 years Weighted Average Discount Rate Operating leases 6.9 % Finance leases 6.2 %
Operating Lease, Liability, Maturity	Maturities of lease liabilities were as follows: Operating Leases Finance Leases (In thousands) 2019 $ 20,175 $ 288 2020 21,797 183 2021 18,366 68 2022 15,054 37 2023 13,053 14 Thereafter 41,508 1 Total $ 129,953 $ 591
Finance Lease, Liability, Maturity	Maturities of lease liabilities were as follows: Operating Leases Finance Leases (In thousands) 2019 $ 20,175 $ 288 2020 21,797 183 2021 18,366 68 2022 15,054 37 2023 13,053 14 Thereafter 41,508 1 Total $ 129,953 $ 591

Severance, Restructuring, and_2

Severance, Restructuring, and Acquisition Integration Activities (Tables)	3 Months Ended
	Mar. 31, 2019
Restructuring and Related Activities [Abstract]
Severance, Restructuring and Integration Costs by Segment	The following table summarizes the costs by segment of the various programs described above as well as other immaterial programs and acquisition integration activities: Severance Other Restructuring and Integration Costs Total Costs Three Months Ended March 31, 2019 (In thousands) Enterprise Solutions $ 220 $ 3,555 $ 3,775 Industrial Solutions — — — Total $ 220 $ 3,555 $ 3,775 Three Months Ended April 1, 2018 Enterprise Solutions $ 508 $ 14,026 $ 14,534 Industrial Solutions 52 5,808 5,860 Total $ 560 $ 19,834 $ 20,394

Long-Term Debt and Other Borr_2

Long-Term Debt and Other Borrowing Arrangements (Tables)	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Carrying Values of Long-Term Debt and Other Borrowing Arrangements	The carrying values of our long-term debt were as follows: March 31, 2019 December 31, 2018 (In thousands) Revolving credit agreement due 2022 $ — $ — Senior subordinated notes: 3.875% Senior subordinated notes due 2028 393,750 400,050 3.375% Senior subordinated notes due 2027 506,250 514,350 4.125% Senior subordinated notes due 2026 225,000 228,600 2.875% Senior subordinated notes due 2025 337,500 342,900 Total senior subordinated notes 1,462,500 1,485,900 Less unamortized debt issuance costs (22,008 ) (22,700 ) Long-term debt $ 1,440,492 $ 1,463,200

Pension and Other Postretirem_2

Pension and Other Postretirement Obligations (Tables)	3 Months Ended
	Mar. 31, 2019
Retirement Benefits [Abstract]
Components of Net Periodic Benefit Costs	The following table provides the components of net periodic benefit costs for our pension and other postretirement benefit plans: Pension Obligations Other Postretirement Obligations Three Months Ended March 31, 2019 April 1, 2018 March 31, 2019 April 1, 2018 (In thousands) Service cost $ 1,058 $ 1,133 $ 10 $ 13 Interest cost 3,010 1,876 272 264 Expected return on plan assets (4,116 ) (2,520 ) — — Amortization of prior service credit (14 ) (10 ) — — Actuarial losses (gains) 327 665 (26 ) — Net periodic benefit cost $ 265 $ 1,144 $ 256 $ 277

Comprehensive Income and Accu_2

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Total Comprehensive Income (Loss)	The following table summarizes total comprehensive income (loss): Three Months Ended March 31, 2019 April 1, 2018 (In thousands) Net income $ 25,178 $ 2,570 Foreign currency translation gain (loss), net of $0.4 million and $0.5 million tax, respectively 28,791 (31,795 ) Adjustments to pension and postretirement liability, net of $0.1 million and $0.3 million tax, respectively 219 403 Total comprehensive income (loss) 54,188 (28,822 ) Less: Comprehensive loss attributable to noncontrolling interest (23 ) (32 ) Comprehensive income (loss) attributable to Belden $ 54,211 $ (28,790 )
Components of Other Comprehensive Income (Loss), Net of Tax	The accumulated balances related to each component of other comprehensive income (loss), net of tax, are as follows: Foreign Currency Translation Component Pension and Other Postretirement Benefit Plans Accumulated Other Comprehensive Income (Loss) (In thousands) Balance at December 31, 2018 $ (41,882 ) $ (33,025 ) $ (74,907 ) Other comprehensive income attributable to Belden before reclassifications 28,790 — 28,790 Amounts reclassified from accumulated other comprehensive income — 219 219 Net current period other comprehensive gain attributable to Belden 28,790 219 29,009 Balance at March 31, 2019 $ (13,092 ) $ (32,806 ) $ (45,898 )
Summary of Effects of Reclassifications from Accumulated Other Comprehensive Income (Loss)	The following table summarizes the effects of reclassifications from accumulated other comprehensive income (loss) for the three months ended March 31, 2019 : Amount Reclassified from Accumulated Other Comprehensive Income Affected Line Item in the Consolidated Statements of Operations and Comprehensive Income (In thousands) Amortization of pension and other postretirement benefit plan items: Actuarial losses $ 301 (1) Prior service credit (14 ) (1) Total before tax 287 Tax benefit (68 ) Total net of tax $ 219

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)Segment	Jan. 01, 2019USD ($)	Dec. 31, 2018USD ($)
Significant Accounting Policies [Line Items]
Number of global business platforms | Segment	2
Operating lease right-of-use assets	$ 85,327		$ 0
Operating lease liability	97,014
Standby Letters of Credit
Significant Accounting Policies [Line Items]
Loss contingency, range of possible loss, portion not accrued	7,300
Bank Guaranties
Significant Accounting Policies [Line Items]
Loss contingency, range of possible loss, portion not accrued	3,600
Surety Bonds
Significant Accounting Policies [Line Items]
Loss contingency, range of possible loss, portion not accrued	$ 3,300
Accounting Standards Update 2016-02
Significant Accounting Policies [Line Items]
Operating lease right-of-use assets		$ 90,500
Operating lease liability		$ 103,400

Revenues - Narrative (Details)

Revenues - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019
Revenue from Contract with Customer [Abstract]
Accrued rebates	$ 17.7
Accrued returns	11.7
Estimated price adjustments, accounts receivable	25.8
Contract with customer, deferred revenues	107.8	$ 113.3
Contract with customer, deferred revenue additions	47.8
Contract with customer, deferred revenues, current	92.5
Contract with customer, deferred revenues, noncurrent	15.3
Contract with customer, revenue recognized	53.3
Deferred sales commission	3.4
Sales commissions	$ 5.6

Revenues - Major Product Catego

Revenues - Major Product Category (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 587,175	$ 605,565
Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	326,527	349,124
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	260,648	256,441
Cable & Connectivity
Disaggregation of Revenue [Line Items]
Revenues	392,179	397,197
Cable & Connectivity | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	233,671	234,467
Cable & Connectivity | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	158,508	162,730
Networking, Software & Security
Disaggregation of Revenue [Line Items]
Revenues	194,996	208,368
Networking, Software & Security | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	92,856	114,657
Networking, Software & Security | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 102,140	$ 93,711

Revenues - Location of Customer

Revenues - Location of Customer (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 587,175	$ 605,565
Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	326,527	349,124
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	260,648	256,441
Americas
Disaggregation of Revenue [Line Items]
Revenues	363,838	375,091
Americas | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	211,264	225,279
Americas | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	152,574	149,812
EMEA
Disaggregation of Revenue [Line Items]
Revenues	140,635	145,921
EMEA | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	67,320	73,329
EMEA | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	73,315	72,592
APAC
Disaggregation of Revenue [Line Items]
Revenues	82,702	84,553
APAC | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	47,943	50,516
APAC | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 34,759	$ 34,037

Revenues - Products and Service

Revenues - Products and Services (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 587,175	$ 605,565
Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	326,527	349,124
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	260,648	256,441
Products
Disaggregation of Revenue [Line Items]
Revenues	546,563	564,798
Products | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	307,859	332,737
Products | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	238,704	232,061
Support & Services
Disaggregation of Revenue [Line Items]
Revenues	40,612	40,767
Support & Services | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	18,668	16,387
Support & Services | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 21,944	$ 24,380

Acquisitions - Additional Infor

Acquisitions - Additional Information (Details) - USD ($)	Apr. 25, 2018	Feb. 08, 2018	Mar. 31, 2019	Apr. 01, 2018
Business Acquisition [Line Items]
Severance, restructuring, and acquisition integration costs			$ 3,775,000	$ 20,394,000
Amortization of intangibles			$ 23,341,000	24,418,000
Net-Tech Technology, Inc.
Business Acquisition [Line Items]
Percentage of outstanding shares acquired	100.00%
Acquisition price paid	$ 8,500,000
Snell Advanced Media
Business Acquisition [Line Items]
Percentage of outstanding shares acquired		100.00%
Acquisition Price		$ 104,500,000
Acquisition price paid		75,200,000
Maximum earnout consideration		31,400,000
Estimated earnout consideration		29,300,000
Long-term debt acquired		19,315,000
Receivables		16,551,000
Tax basis in acquired goodwill		$ 0
Post acquisition revenue of acquiree				20,800,000
Post acquisition income (loss) before taxes of acquiree				(2,800,000)
Amortization of intangibles				2,200,000
Inventory adjustment				$ 500,000

Acquisitions - Schedule of Reco

Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Feb. 08, 2018
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Goodwill	$ 1,563,827	$ 1,557,653
Snell Advanced Media
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Receivables			$ 16,551
Inventory			15,084
Prepaid and other current assets			3,799
Property, plant, and equipment			7,716
Intangible assets			51,000
Goodwill			103,466
Deferred income taxes			1,388
Other long-lived assets			3,046
Total assets acquired			202,050
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Accounts payable			11,825
Accrued liabilities			25,135
Deferred revenue			8,860
Long-term debt			19,315
Postretirement benefits			31,774
Other long-term liabilities			591
Total liabilities assumed			97,500
Net assets			$ 104,550

Acquisitions - Schedule of Acqu

Acquisitions - Schedule of Acquired Intangible Assets (Details) - Snell Advanced Media $ in Thousands	Feb. 08, 2018USD ($)
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 51,000
Total intangible assets not subject to amortization	103,466
Total intangible assets	$ 154,466
Amortization Period	6 years 2 months 12 days
Goodwill
Business Acquisition [Line Items]
Total intangible assets not subject to amortization	$ 103,466
Developed technologies
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 36,500
Amortization Period	5 years
Customer relationships
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 11,000
Amortization Period	12 years
Sales backlog
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 1,900
Amortization Period	9 days
Trademarks
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 1,600
Amortization Period	27 days

Acquisitions - Schedule of Pro

Acquisitions - Schedule of Pro Forma Information (Details) - Snell Advanced Media $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 01, 2018USD ($)$ / shares
Business Acquisition [Line Items]
Revenues	$ 614,184
Net loss attributable to Belden common stockholders	$ (1,072)
Diluted income (loss) per share attributable to Belden common stockholders (in usd per share) | $ / shares	$ (0.03)

Operating Segments - Additional

Operating Segments - Additional Information (Details)	3 Months Ended
	Mar. 31, 2019Segment
Segment Reporting [Abstract]
Number of global business platforms	2

Operating Segments - Operating

Operating Segments - Operating Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Segment revenues	$ 587,175	$ 605,565
Depreciation expense	12,700	11,900
Amortization of intangibles	23,341	24,418
Severance, restructuring, and acquisition integration costs	3,775	20,394
Segment assets	3,757,958		$ 3,779,321
Enterprise Solutions
Segment Reporting Information [Line Items]
Segment revenues	326,527	349,124
Severance, restructuring, and acquisition integration costs	3,775	14,534
Industrial Solutions
Segment Reporting Information [Line Items]
Segment revenues	260,648	256,441
Severance, restructuring, and acquisition integration costs	0	5,860
Reportable Segment
Segment Reporting Information [Line Items]
Segment revenues	587,175	607,423
Segment EBITDA	87,017	103,878
Depreciation expense	12,723	11,865
Amortization of intangibles	23,341	24,418
Amortization of software development intangible assets	937	236
Severance, restructuring, and acquisition integration costs	3,775	20,394
Purchase accounting effects of acquisitions	1,313	502
Deferred revenue adjustments	0	1,858
Segment assets	1,259,723	1,180,444
Reportable Segment | Enterprise Solutions
Segment Reporting Information [Line Items]
Segment revenues	326,527	350,990
Segment EBITDA	39,558	57,452
Depreciation expense	7,734	7,220
Amortization of intangibles	10,170	11,170
Amortization of software development intangible assets	914	236
Severance, restructuring, and acquisition integration costs	3,775	14,534
Purchase accounting effects of acquisitions	1,313	502
Deferred revenue adjustments		1,858
Segment assets	782,517	747,971
Reportable Segment | Industrial Solutions
Segment Reporting Information [Line Items]
Segment revenues	260,648	256,433
Segment EBITDA	47,459	46,426
Depreciation expense	4,989	4,645
Amortization of intangibles	13,171	13,248
Amortization of software development intangible assets	23	0
Severance, restructuring, and acquisition integration costs	0	5,860
Purchase accounting effects of acquisitions	0	0
Deferred revenue adjustments		0
Segment assets	477,206	432,473
Affiliate revenues | Reportable Segment
Segment Reporting Information [Line Items]
Segment revenues	1,386	875
Affiliate revenues | Reportable Segment | Enterprise Solutions
Segment Reporting Information [Line Items]
Segment revenues	1,369	846
Affiliate revenues | Reportable Segment | Industrial Solutions
Segment Reporting Information [Line Items]
Segment revenues	$ 17	$ 29

Operating Segments - Reconcilia

Operating Segments - Reconciliation of Total Reportable Segments' Revenues and EBITDA to Consolidated Revenues and Consolidated Income Before Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment revenues	$ 587,175	$ 605,565
Amortization of intangibles	(23,341)	(24,418)
Depreciation expense	(12,700)	(11,900)
Severance, restructuring, and acquisition integration costs	(3,775)	(20,394)
Operating income	44,445	44,203
Interest expense, net	(14,193)	(16,978)
Non-operating pension benefit (cost)	547	(275)
Loss on debt extinguishment	0	(19,960)
Consolidated income before taxes	30,799	6,990
Reportable Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment revenues	587,175	607,423
Deferred revenue adjustments	0	(1,858)
Total Segment EBITDA	87,017	103,878
Amortization of intangibles	(23,341)	(24,418)
Depreciation expense	(12,723)	(11,865)
Severance, restructuring, and acquisition integration costs	(3,775)	(20,394)
Purchase accounting effects related to acquisitions	(1,313)	(502)
Amortization of software development intangible assets	(937)	(236)
Loss on sale of assets	0	(94)
Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	(483)	(308)
Snell Advanced Media
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Amortization of intangibles		$ (2,200)
Earnout accrued expense recognized within selling, general and administrative expense	$ 1,300

Income Per Share - Basis for In

Income Per Share - Basis for Income Per Share Computations (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Numerator:
Net income	$ 25,178	$ 2,570
Less: Net loss attributable to noncontrolling interest	(24)	(48)
Less: Preferred stock dividends	8,733	8,733
Net income (loss) attributable to Belden common stockholders	$ 16,469	$ (6,115)
Denominator:
Weighted average shares outstanding, basic (in shares)	39,420	41,633
Effect of dilutive common stock equivalents (in shares)	240	0
Weighted average shares outstanding, diluted (in shares)	39,660	41,633

Income Per Share - Additional I

Income Per Share - Additional Information (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from diluted weighted average shares outstanding (in shares)	1,000	500
Anti-dilutive shares excluded from diluted weighted average shares outstanding due to performance conditions not being met (in shares)	300	200
Weighted Average Number Diluted Shares Outstanding Adjustment	240	0
Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from diluted weighted average shares outstanding (in shares)	6,900	6,900

Inventories - Major Classes of

Inventories - Major Classes of Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 140,162	$ 146,803
Work-in-process	50,560	45,939
Finished goods	166,584	152,572
Gross inventories	357,306	345,314
Excess and obsolete reserves	(30,536)	(28,896)
Net inventories	$ 326,770	$ 316,418

Leases Additional Information (

Leases Additional Information (Details)	3 Months Ended
	Mar. 31, 2019
Minimum
Lessee, Lease, Description [Line Items]
Operating and finance lease, term of contract	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating and finance lease, term of contract	16 years

Leases Components of Lease Expe

Leases Components of Lease Expense (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating Lease, Cost	$ 4,873
Finance Lease, Right-of-Use Asset, Amortization	26
Finance Lease, Interest Expense	4
Lease, Cost	$ 30

Leases Supplemental Cash Flow I

Leases Supplemental Cash Flow Information Related To Leases (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating cash flows from operating leases	$ 5,088
Operating cash flows from finance leases	9
Financing cash flows from finance leases	$ 70

Leases Supplemental Balance She

Leases Supplemental Balance Sheet Information Related To Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease assets	$ 85,327	$ 0
Accrued liabilities	17,923
Long-term operating lease liabilities	79,091	$ 0
Operating lease liability	97,014
Other long-lived assets, at cost	848
Accumulated depreciation	(443)
Other long-lived assets, net	$ 405

Leases Supplemental Other Infor

Leases Supplemental Other Information Related To Leases (Details)	Mar. 31, 2019
Weighted Average Remaining Lease Term
Operating leases	7 years
Finance leases	3 years
Weighted Average Discount Rate
Operating leases	6.90%
Finance leases	6.20%

Leases Maturities of Lease Liab

Leases Maturities of Lease Liabilities (Details) $ in Thousands	Mar. 31, 2019USD ($)
Operating leases
2019	$ 20,175
2020	21,797
2021	18,366
2022	15,054
2023	13,053
Thereafter	41,508
Total minimum rental commitments	129,953
Finance leases
2019	288
2020	183
2021	68
2022	37
2023	14
Thereafter	1
Total minimum rental commitments	$ 591

Long-Lived Assets - Additional

Long-Lived Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 12.7	$ 11.9
Amortization of Intangible Assets Including Amortization of Software Development	$ 24.3	$ 24.6

Severance, Restructuring and Ac

Severance, Restructuring and Acquisition Integration Activities - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	$ 3,775	$ 20,394
Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and integration cost payable period	60 days
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	$ 600	9,400
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	2,800	9,400
Research and Development
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	400	1,600
Grass Valley And SAM Integration Program
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	$ 3,000	9,200
Industrial Manufacturing Footprint Program
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs		$ 7,500

Severance, Restructuring and _2

Severance, Restructuring and Acquisition Integration Activities - Severance, Restructuring and Integration Costs by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Restructuring Cost and Reserve [Line Items]
Document Period End Date	Mar. 31, 2019
Severance	$ 220	$ 560
Other Restructuring and Integration Costs	3,555	19,834
Total Costs	3,775	20,394
Enterprise Solutions
Restructuring Cost and Reserve [Line Items]
Severance	220	508
Other Restructuring and Integration Costs	3,555	14,026
Total Costs	3,775	14,534
Industrial Solutions
Restructuring Cost and Reserve [Line Items]
Severance	0	52
Other Restructuring and Integration Costs	0	5,808
Total Costs	$ 0	$ 5,860

Long-Term Debt and Other Borr_3

Long-Term Debt and Other Borrowing Arrangements - Carrying Values of Long-Term Debt and Other Borrowing Arrangements (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total senior subordinated notes	$ 1,462,500,000	$ 1,485,900,000
Less unamortized debt issuance costs	(22,008,000)	(22,700,000)
Long-term debt	1,440,492,000	1,463,200,000
Revolving credit agreement due 2022
Debt Instrument [Line Items]
Revolving credit agreement due 2022	$ 0	$ 0
3.875% Senior subordinated notes due 2028
Debt Instrument [Line Items]
Senior subordinated notes interest rate	3.875%	3.875%
Total senior subordinated notes	$ 393,750,000	$ 400,050,000
3.375% Senior subordinated notes due 2027
Debt Instrument [Line Items]
Senior subordinated notes interest rate	3.375%	3.375%
Total senior subordinated notes	$ 506,250,000	$ 514,350,000
4.125% Senior subordinated notes due 2026
Debt Instrument [Line Items]
Senior subordinated notes interest rate	4.125%	4.125%
Total senior subordinated notes	$ 225,000,000	$ 228,600,000
2.875% Senior subordinated notes due 2025
Debt Instrument [Line Items]
Senior subordinated notes interest rate	2.875%	2.875%
Total senior subordinated notes	$ 337,500,000	$ 342,900,000

Long-Term Debt and Other Borr_4

Long-Term Debt and Other Borrowing Arrangements - Additional Information (Details)	May 16, 2017USD ($)	Mar. 31, 2019EUR (€)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Mar. 31, 2018EUR (€)
Debt Instrument [Line Items]
Senior subordinated notes			$ 1,462,500,000	$ 1,485,900,000
Senior Subordinated Notes
Debt Instrument [Line Items]
Senior subordinated notes			1,462,500,000
Fair value of senior subordinated notes			1,486,700,000
Revolving credit agreement due 2022
Debt Instrument [Line Items]
Revolving credit agreement due 2022, maximum borrowing capacity	$ 400,000,000
Commitment fee percentage	0.25%
Fixed charge coverage, minimum threshold (as a percent)	90.00%
Revolving credit agreement due 2022, borrowings outstanding			0	$ 0
Revolving credit agreement due 2022, available borrowing capacity			$ 345,500,000
Revolving credit agreement due 2022 | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)	1.25%
Revolving credit agreement due 2022 | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)	1.75%
3.875% Senior subordinated notes due 2028
Debt Instrument [Line Items]
Senior subordinated notes interest rate		3.875%	3.875%	3.875%
Senior subordinated notes			$ 393,750,000	$ 400,050,000
3.875% Senior subordinated notes due 2028 | Senior Subordinated Notes
Debt Instrument [Line Items]
Aggregate principal amount outstanding of senior subordinated notes | €					€ 350,000,000
Senior subordinated notes interest rate					3.875%
3.375% Senior subordinated notes due 2027
Debt Instrument [Line Items]
Senior subordinated notes interest rate		3.375%	3.375%	3.375%
Senior subordinated notes			$ 506,250,000	$ 514,350,000
3.375% Senior subordinated notes due 2027 | Senior Subordinated Notes
Debt Instrument [Line Items]
Aggregate principal amount outstanding of senior subordinated notes | €		€ 450,000,000
Senior subordinated notes interest rate		3.375%	3.375%
4.125% Senior subordinated notes due 2026
Debt Instrument [Line Items]
Senior subordinated notes interest rate		4.125%	4.125%	4.125%
Senior subordinated notes			$ 225,000,000	$ 228,600,000
4.125% Senior subordinated notes due 2026 | Senior Subordinated Notes
Debt Instrument [Line Items]
Aggregate principal amount outstanding of senior subordinated notes | €		€ 200,000,000
2.875% Senior subordinated notes due 2025
Debt Instrument [Line Items]
Senior subordinated notes interest rate		2.875%	2.875%	2.875%
Senior subordinated notes			$ 337,500,000	$ 342,900,000
2.875% Senior subordinated notes due 2025 | Senior Subordinated Notes
Debt Instrument [Line Items]
Aggregate principal amount outstanding of senior subordinated notes | €		€ 300,000,000
Senior subordinated notes interest rate		2.875%	2.875%

Net Investment Hedge (Details)

Net Investment Hedge (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cumulative translation adjustment	$ 28,791	$ (31,795)
Senior Subordinated Notes
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cumulative translation adjustment	$ 23,600	$ 39,200

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Income Tax Disclosure [Abstract]
Income tax (benefit) expense	$ 5,621	$ 4,420
Effective tax rate	18.30%	63.20%
Change in valuation allowance income tax benefit	$ 800
Income tax expense related to debt refinance		$ 1,800
Tax Cuts and Jobs Act of 2017, income tax expense		$ 500

Pension and Other Postretirem_3

Pension and Other Postretirement Obligations - Components of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Pension Obligations
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,058	$ 1,133
Interest cost	3,010	1,876
Expected return on plan assets	(4,116)	(2,520)
Amortization of prior service credit	(14)	(10)
Actuarial losses (gains)	327	665
Net periodic benefit cost	265	1,144
Other Postretirement Obligations
Defined Benefit Plan Disclosure [Line Items]
Service cost	10	13
Interest cost	272	264
Expected return on plan assets	0	0
Amortization of prior service credit	0	0
Actuarial losses (gains)	(26)	0
Net periodic benefit cost	$ 256	$ 277

Comprehensive Income and Accu_3

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Total Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Equity [Abstract]
Net income	$ 25,178	$ 2,570
Foreign currency translation gain (loss), net of $0.4 million and $0.5 million tax, respectively	28,791	(31,795)
Adjustments to pension and postretirement liability, net of $0.1 million and $0.3 million tax, respectively	219	403
Total comprehensive income (loss)	54,188	(28,822)
Less: Comprehensive loss attributable to noncontrolling interest	(23)	(32)
Comprehensive income (loss) attributable to Belden	54,211	(28,790)
Foreign currency translation, tax income (loss)	400	500
Adjustments to pension and postretirement liability, tax	$ 100	$ 300

Comprehensive Income and Accu_4

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 1,387,588	$ 1,434,866
Other comprehensive loss, net of tax	29,010	(31,392)
Ending balance	1,431,329	$ 1,292,146
Foreign Currency Translation Component
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(41,882)
Other comprehensive income attributable to Belden before reclassifications	28,790
Amounts reclassified from accumulated other comprehensive income	0
Other comprehensive loss, net of tax	28,790
Ending balance	(13,092)
Pension and Other Postretirement Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(33,025)
Other comprehensive income attributable to Belden before reclassifications	0
Amounts reclassified from accumulated other comprehensive income	219
Other comprehensive loss, net of tax	219
Ending balance	(32,806)
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(74,907)
Other comprehensive income attributable to Belden before reclassifications	28,790
Amounts reclassified from accumulated other comprehensive income	219
Other comprehensive loss, net of tax	29,009
Ending balance	$ (45,898)

Comprehensive Income and Accu_5

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Summary of Effects of Reclassifications from Accumulated Other Comprehensive Income (Loss) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Pension and Other Postretirement Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total net of tax	$ (219)
Reclassification out of Accumulated Other Comprehensive Income | Actuarial losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	301
Reclassification out of Accumulated Other Comprehensive Income | Prior service credit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(14)
Reclassification out of Accumulated Other Comprehensive Income | Pension and Other Postretirement Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	287
Tax benefit	(68)
Total net of tax	$ 219

Preferred Stock Preferred Stock

Preferred Stock Preferred Stock (Details) $ / shares in Units, $ in Thousands	Jul. 15, 2019shares	Mar. 31, 2019USD ($)	Apr. 01, 2018USD ($)	Dec. 31, 2016USD ($)trading_day$ / sharesshares
Class of Stock [Line Items]
Preferred stock dividends | $		$ 8,733	$ 8,733
Depository Shares
Class of Stock [Line Items]
Depository shares issued (in shares)				5,200,000
Interest in preferred stock per depository share				0.01
Six Point Seven Five Percentage Series B Mandatory Convertible Preferred Stock
Class of Stock [Line Items]
Percentage of issued shares				6.75%
Offering price per share (in usd per share) | $ / shares				$ 100
Threshold trading day period | trading_day				20
Proceeds from offering, net | $				$ 501,000
Six Point Seven Five Percentage Series B Mandatory Convertible Preferred Stock | Scenario, Forecast | Minimum
Class of Stock [Line Items]
Preferred stock converted in to common stock (in shares)	120.46
Number of common stock issued upon conversion (in shares)	6,200,000
Six Point Seven Five Percentage Series B Mandatory Convertible Preferred Stock | Scenario, Forecast | Maximum
Class of Stock [Line Items]
Preferred stock converted in to common stock (in shares)	132.50
Number of common stock issued upon conversion (in shares)	6,900,000

Subsequent Events Subsequent Ev

Subsequent Events Subsequent Events (Details) - Opterna International Corp. - Subsequent Event $ in Millions	Apr. 15, 2019USD ($)
Subsequent Event [Line Items]
Percentage of outstanding shares acquired	100.00%
Acquisition price paid	$ 45
Maximum earnout consideration	$ 25