10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

[ X ] Quarterly Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the quarterly period ended April 1, 2018 or

[    ] Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from __________ to __________

Commission File Number 001-34218

COGNEX CORPORATION

(Exact name of registrant as specified in its charter)

Massachusetts	04-2713778
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

One Vision Drive

Natick, Massachusetts 01760-2059

(508) 650-3000

(Address, including zip code, and telephone number, including area code, of principal executive offices)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  

Yes X No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  

Yes X No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act (Check one):

Large accelerated filer	X	Accelerated filer
Non-accelerated filer		(Do not check if a smaller reporting company)
		Smaller reporting company
		Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    

Yes No X

As of April 1, 2018, there were 172,948,442 shares of Common Stock, $.002 par value per share, of the registrant outstanding.

INDEX

PART I	FINANCIAL INFORMATION	3
Item 1.	Financial Statements (interim periods unaudited)	3
	Consolidated Statements of Operations for the three-month periods ended April 1, 2018 and April 2, 2017	3
	Consolidated Statements of Comprehensive Income for the three-month periods ended April 1, 2018 and April 2, 2017	4
	Consolidated Balance Sheets as of April 1, 2018 and December 31, 2017	5
	Consolidated Statements of Cash Flows for the three-month periods ended April 1, 2018 and April 2, 2017	6
	Consolidated Statement of Shareholders’ Equity for the three-month period ended April 1, 2018	7
	Notes to Consolidated Financial Statements	8
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	23
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	27
Item 4.	Controls and Procedures	27
PART II	OTHER INFORMATION
Item 1.	Legal Proceedings	28
Item 1A.	Risk Factors	28
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	28
Item 3.	Defaults Upon Senior Securities	28
Item 4.	Mine Safety Disclosures	28
Item 5.	Other Information	28
Item 6.	Exhibits	29
	Signatures	30

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PART I: FINANCIAL INFORMATION

ITEM 1: FINANCIAL STATEMENTS

COGNEX CORPORATION

CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share amounts)

	Three-months Ended
	April 1, 2018			April 2, 2017
	(unaudited)
Revenue	$	169,567		$	139,039
Cost of revenue	40,198			32,532
Gross margin	129,369			106,507
Research, development, and engineering expenses	31,076			22,770
Selling, general, and administrative expenses	63,697			46,521
Operating income	34,596			37,216
Foreign currency gain (loss)	(134		)	(263		)
Investment income	3,240			2,012
Other income (expense)	277			270
Income before income tax expense	37,979			39,235
Income tax expense (benefit)	762			(6,236		)
Net income	37,217			45,471
Net income per weighted-average common and common-equivalent share:
Basic	$	0.21		$	0.26
Diluted	$	0.21		$	0.25
Weighted-average common and common-equivalent shares outstanding:
Basic	173,280			172,646
Diluted	179,641			178,354
Cash dividends per common share	$	0.0450		$	0.0375

The accompanying notes are an integral part of these consolidated financial statements.

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COGNEX CORPORATION

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)

	Three-months Ended
	April 1, 2018			April 2, 2017
	(unaudited)
Net income	$	37,217		$	45,471
Other comprehensive income (loss), net of tax:
Cash flow hedges:
Net unrealized gain (loss), net of tax of $0 and ($4) in 2018 and 2017, respectively	—			(71		)
Reclassification of net realized (gain) loss into current operations	—			44
Net change related to cash flow hedges	—			(27		)
Available-for-sale investments:
Net unrealized gain (loss), net of tax of ($114) and $92 in 2018 and 2017, respectively	(1,192		)	511
Reclassification of net realized (gain) loss into current operations	(22		)	(65		)
Net change related to available-for-sale investments	(1,214		)	446
Foreign currency translation adjustments:
Foreign currency translation adjustments	4,056			2,481
Net change related to foreign currency translation adjustments	4,056			2,481
Other comprehensive income (loss), net of tax	2,842			2,900
Total comprehensive income	$	40,059		$	48,371

The accompanying notes are an integral part of these consolidated financial statements.

4

COGNEX CORPORATION

CONSOLIDATED BALANCE SHEETS

(In thousands)

	April 1, 2018			December 31, 2017
	(unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	109,572		$	106,582
Short-term investments	337,629			297,961
Accounts receivable, less reserves of $1,664 and $1,568 in 2018 and 2017, respectively	96,649			119,388
Unbilled revenue	4,232			7,454
Inventories	96,399			67,923
Prepaid expenses and other current assets	26,068			30,683
Total current assets	670,549			629,991
Long-term investments	356,181			423,441
Property, plant, and equipment, net	85,205			78,048
Goodwill	113,208			113,208
Intangible assets, net	12,420			13,189
Deferred income taxes	29,135			27,385
Other assets	2,217			2,491
Total assets	$	1,268,915		$	1,287,753
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	29,136		$	23,463
Accrued expenses	56,463			68,249
Accrued income taxes	11,915			11,503
Deferred revenue and customer deposits	15,504			9,420
Total current liabilities	113,018			112,635
Deferred income taxes	319			312
Reserve for income taxes	6,958			6,488
Accrued income taxes	66,741			66,741
Other non-current liabilities	4,780			5,904
Total liabilities	191,816			192,080
Shareholders’ equity:
Common stock, $.002 par value – Authorized: 200,000 shares in 2018 and 2017, respectively, issued and outstanding: 172,948 and 173,507 shares in 2018 and 2017, respectively	346			347
Additional paid-in capital	485,654			461,338
Retained earnings	622,856			668,587
Accumulated other comprehensive loss, net of tax	(31,757		)	(34,599		)
Total shareholders’ equity	1,077,099			1,095,673
	$	1,268,915		$	1,287,753

The accompanying notes are an integral part of these consolidated financial statements.

5

COGNEX CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

	Three-months Ended
	April 1, 2018			April 2, 2017
	(unaudited)
Cash flows from operating activities:
Net income	$	37,217		$	45,471
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	13,194			7,483
Depreciation of property, plant, and equipment	4,430			3,083
Amortization of intangible assets	769			872
Amortization of discounts or premiums on investments	56			86
Realized (gain) loss on sale of investments	(22		)	(65		)
Revaluation of contingent consideration	(442		)	(275		)
Change in deferred income taxes	(1,469		)	921
Change in operating assets and liabilities:
Accounts receivable	24,830			(2,238		)
Unbilled revenue	3,389			953
Inventories	(27,321		)	(5,386		)
Prepaid expenses and other current assets	(866		)	(12,461		)
Accounts payable	5,309			7,167
Accrued expenses	(9,927		)	(3,398		)
Accrued income taxes	186			397
Deferred revenue and customer deposits	5,877			5,839
Other	(424		)	(734		)
Net cash provided by operating activities	54,786			47,715
Cash flows from investing activities:
Purchases of investments	(118,108		)	(193,612		)
Maturities and sales of investments	144,337			171,667
Purchases of property, plant, and equipment	(13,270		)	(6,095		)
Cash paid for acquisition of business	—			(176		)
Cash paid related to discontinued business	—			(291		)
Net cash provided by (used in) investing activities	12,959			(28,507		)
Cash flows from financing activities:
Issuance of common stock under stock plans	11,123			29,139
Repurchase of common stock	(69,202		)	(30,067		)
Payment of dividends	(7,787		)	(6,497		)
Net cash provided by (used in) financing activities	(65,866		)	(7,425		)
Effect of foreign exchange rate changes on cash and cash equivalents	1,111			1,004
Net change in cash and cash equivalents	2,990			12,787
Cash and cash equivalents at beginning of period	106,582			79,641
Cash and cash equivalents at end of period	$	109,572		$	92,428

The accompanying notes are an integral part of these consolidated financial statements.

6

COGNEX CORPORATION

CONSOLIDATED STATEMENT OF SHAREHOLDERS’ EQUITY

(In thousands)

	Common Stock					Additional Paid-in Capital		Retained Earnings			Accumulated Other Comprehensive Loss			Total Shareholders’ Equity
	Shares		Par Value
Balance as of December 31, 2017	173,507		$	347		$	461,338	$	668,587		$	(34,599	)	$	1,095,673
Issuance of common stock under stock plans	697		1			11,122		—			—			11,123
Repurchase of common stock	(1,256	)	(2		)	—		(69,200		)	—			(69,202		)
Stock-based compensation expense	—		—			13,194		—			—			13,194
Payment of dividends	—		—			—		(7,787		)	—			(7,787		)
Adjustment as a result of the adoption of ASU 2016-16 "Income Taxes - Intra-Entity Transfers Other than Inventory" (Note 12)	—		—			—		(5,961		)	—			(5,961		)
Net income	—		—			—		37,217			—			37,217
Net unrealized gain (loss) on available-for-sale investments, net of tax of ($114)	—		—			—		—			(1,192		)	(1,192		)
Reclassification of net realized (gain) loss on the sale of available-for-sale investments	—		—			—		—			(22		)	(22		)
Foreign currency translation adjustment	—		—			—		—			4,056			4,056
Balance as of April 1, 2018 (unaudited)	172,948		$	346		$	485,654	$	622,856		$	(31,757	)	$	1,077,099

The accompanying notes are an integral part of these consolidated financial statements.

7

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 1: Summary of Significant Accounting Policies

As permitted by the rules of the Securities and Exchange Commission applicable to Quarterly Reports on Form 10-Q, these notes are condensed and do not contain all disclosures required by generally accepted accounting principles (GAAP). As a result of the adoption of ASC 606 "Revenue from Contracts with Customers," Cognex Corporation (the "Company") has provided new disclosures related to revenue recognition in this Quarterly Report on Form 10-Q. Reference should be made to the consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 for a full description of other significant accounting policies.

In the opinion of the management of the Company, the accompanying consolidated unaudited financial statements contain all adjustments, consisting of normal, recurring adjustments and financial statement reclassifications, necessary to present fairly the Company’s financial position as of April 1, 2018, and the results of its operations for the three-month periods ended April 1, 2018 and April 2, 2017, and changes in shareholders’ equity, comprehensive income, and cash flows for the periods presented.

The results disclosed in the Consolidated Statements of Operations for the three-month period ended April 1, 2018 are not necessarily indicative of the results to be expected for the full year.

Revenue Recognition

The Company recognizes revenue in accordance with Accounting Standards Codification (ASC) 606, “Revenue from Contracts with Customers.” The core principle of ASC 606 is to recognize revenue in a manner that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The framework in support of this core principle includes: (1) identifying the contract with the customer; (2) identifying the performance obligations in the contract; (3) determining the transaction price; (4) allocating the transaction price to the performance obligations; and (5) recognizing revenue when (or as) the performance obligations are satisfied.

Identifying the Contract with the Customer

The Company identifies contracts with customers as agreements that create enforceable rights and obligations, which typically take the form of customer contracts or purchase orders.

Identifying the Performance Obligations in the Contract

The Company identifies performance obligations as promises in contracts to transfer distinct goods or services. Standard products and services that the Company regularly sells separately are accounted for as distinct performance obligations. Application-specific customer solutions that are comprised of a combination of products and services are accounted for as one performance obligation to deliver a total solution to the customer. These solutions are provided to customers in a variety of industries, including the consumer electronics, logistics, and automotive industries.

Shipping and handling activities for which the Company is responsible under the terms and conditions of the sale are not accounted for as performance obligations but as fulfillment costs. These activities are required to fulfill the Company’s promise to transfer the good and are expensed when revenue is recognized.

The Company does not assess whether promised goods or services are performance obligations if they are immaterial in the context of the contract. If revenue is recognized before immaterial promises have been completed, then the costs related to such immaterial promises are accrued at the time of sale.

Determining the Transaction Price

The Company determines the transaction price as the amount of consideration it expects to receive in exchange for transferring promised goods or services to the customer. Amounts collected from customers for sales taxes are excluded from the transaction price.

If a contract includes a variable amount, such as a rebate, then the Company estimates the transaction price using either the expected value or the most likely amount of consideration to be received, depending upon the specific facts and circumstances. The Company includes estimated variable consideration in the transaction price only to the extent it is probable that a significant reversal of revenue will not occur when the uncertainty is resolved. The Company updates its estimate of variable consideration at the end of each reporting period to reflect changes in facts and circumstances.

8

Allocating the Transaction Price to the Performance Obligations

The Company allocates the transaction price to each performance obligation at contract inception based on a relative stand-alone selling price basis, or the price at which the Company would sell the good or service separately to similar customers in similar circumstances.

Recognizing Revenue When (or As) the Performance Obligations are Satisfied

The Company recognizes revenue when it transfers the promised goods or services to the customer. Revenue for standard products is recognized at the point in time when the customer obtains control of the goods, which is typically upon delivery when the customer has legal title, physical possession, the risks and rewards of ownership, and an enforceable obligation to pay for the products. Revenue for services, which are not material, are typically recognized over the time the services are provided.

Revenue for application-specific customer solutions is recognized at the point in time when the solution is validated, which is the point in time when the Company can objectively determine that the agreed-upon specifications in the contract have been met and the customer will accept the performance obligations in the arrangement. Although the customer may have taken legal title and physical possession of the goods when they arrived at the customer’s designed site, the significant risks and rewards of ownership transfer to the customer only upon validation.

In certain instances, an arrangement may include customer-specified acceptance provisions or performance guarantees that allow the customer to accept or reject delivered products that do not meet the customer’s specifications. If the Company can objectively determine that control of a good or service has been transferred to the customer in accordance with the agreed-upon specifications in the contract, then customer acceptance is a formality. If acceptance provisions are presumed to be substantive, then revenue is deferred until customer acceptance.

For the Company’s standard products and services, revenue recognition and billing typically occur at the same time. For application-specific customer solutions, however, the agreement with the customer may provide for billing terms which differ from revenue recognition criteria, resulting in either deferred revenue or unbilled revenue. Credit assessments are performed to determine payment terms, which vary by region, industry, and customer. Prepayment terms result in contract liabilities for customer deposits. When credit is granted to customers, payment is typically due 30 to 90 days from billing. The Company's contracts have an original expected duration of less than one year, and therefore as a practical expedient, the Company has elected to ignore the impact of the time value of money on a contract and to expense sales commissions. The Company recognizes an asset for costs to fulfill a contract if the costs relate directly to the contract and to future performance, and the costs are expected to be recovered.

Management exercises judgment when determining the amount of revenue to be recognized each period. Such judgments include, but are not limited to, assessing the customer’s ability and intention to pay substantially all of the contract consideration when due, determining when two or more contracts should be combined and accounted for as a single contract, determining whether a contract modification has occurred, assessing whether promises are immaterial in the context of the contract, determining whether material promises in a contract represent distinct performance obligations, estimating the transaction price for a contract that contains variable consideration, determining the stand-alone selling price of each performance obligation, determining whether control is transferred over time or at a point in time for performance obligations, and assessing whether formal customer acceptance provisions are substantive.

NOTE 2: New Pronouncements

Accounting Standards Update (ASU) 2016-02, "Leases"

ASU 2016-02 creates Topic 842, Leases. The objective of this Update is to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet, and disclosing key information about leasing arrangements. This ASU applies to any entity that enters into a lease, although lessees will see the most significant changes. The main difference between current U.S. GAAP and Topic 842 is the recognition of lease assets and lease liabilities on the balance sheet for those leases classified as operating leases under current U.S. GAAP. Topic 842 distinguishes between finance leases and operating leases, which are substantially similar to the classification criteria for distinguishing between capital leases and operating leases under current U.S. GAAP. For public companies, the guidance in ASU 2016-02 is effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods. This ASU should be applied using a modified retrospective approach. Management is in the process of implementing this Update. As of the date of this report, management has determined the scope of leases subject to the new accounting requirements and has selected a software package to assist with compliance. Management is in the process of drafting the internal accounting lease policy and designing the related processes and internal controls.

9

Accounting Standards Update (ASU) 2016-13, "Financial Instruments - Measurement of Credit Losses"

ASU 2016-13 applies to all reporting entities holding financial assets that are not accounted for at fair value through net income (debt securities).  The amendments in this Update eliminate the probable initial recognition threshold to recognize a credit loss under current U.S. GAAP and, instead, reflect an entity’s current estimate of all expected credit losses. In addition, this Update broadens the information an entity must consider in developing the credit loss estimate, including the use of reasonable and supportable forecasted information.  The amendments in this Update require that credit losses on available-for-sale debt securities be presented as an allowance rather than as a write-down and an entity will be able to record reversals of credit losses in current period net income. For public companies, the guidance in ASU 2016-13 is effective for annual periods beginning after December 15, 2019, and interim periods within those annual periods.  This ASU should be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective.  Management does not expect ASU 2016-13 to have a material impact on the Company's financial statements and disclosures.

Accounting Standards Update (ASU) 2017-08, "Receivables - Nonrefundable Fees and Other Costs - Premium Amortization on Purchased Callable Debt Securities "

ASU 2017-08 applies to all reporting entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date (that is, at a premium). The amendments in this Update shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. Under current GAAP, premiums and discounts on callable debt securities generally are amortized to the maturity date. If that callable debt security is subsequently called, the entity records a loss equal to the unamortized premium. The amendments in this Update more closely align the amortization period of premiums and discounts to expectations incorporated in market pricing on the underlying securities. For public companies, the amendments in ASU 2017-08 are effective for annual periods beginning after December 15, 2019 and interim reporting periods within annual years beginning after December 15, 2020. This ASU should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption, and, in the period of adoption, the entity is required to provide disclosures about the change in accounting principle. Early adoption is permitted, including adoption in an interim period. Management does not expect ASU 2017-08 to have a material impact on the Company's financial statements and disclosures.

Accounting Standards Update (ASU) 2017-12, "Derivatives and Hedging - Targeted Improvements to Accounting for Hedging Activities"

ASU 2017-12 applies to all reporting entities that elect to apply hedge accounting. The hedge accounting requirements under current GAAP sometimes do not permit an entity to properly recognize the economic results of the hedging strategy in the financial statements, and they are difficult to understand and interpret. The amendments in this Update make certain targeted improvements to simplify the application of the hedge accounting guidance. Also, they better align the risk management activities and financial reporting for hedging relationships through changes to both 1) the designation and measurement guidance for qualifying hedging relationships and 2) the presentation of hedge results. For public companies, the amendments in ASU 2017-12 are effective for annual reporting periods beginning after December 15, 2018, and interim reporting periods within those annual periods. Early adoption is permitted including adoption in any interim period after issuance of the Update. All transition requirements and elections should be applied to hedging relationships existing on the date of adoption. The entity should apply a cumulative-effect adjustment related to eliminating the separate measurement of ineffectiveness to accumulated other comprehensive income with a corresponding adjustment to the opening balance of retained earnings as of the beginning of the fiscal year that an entity adopts the amendments in this Update. The amended presentation and disclosure guidance is required only prospectively. Management does not expect ASU 2017-12 to have a material impact on the Company's financial statements and disclosures.

Accounting Standards Update (ASU) 2018-1, "Land Easement Practical Expedient for Transition to Topic 842"

ASU 2018-01 applies to entities with land easements that exist or expired before an entity’s adoption of Topic 842, provided that the entity does not account for those land easements as leases under Topic 840. The amendments in this Update permit an entity to elect an optional transition practical expedient to not evaluate under Topic 842 land easements that exist or expired before the entity’s adoption of Topic 842 and that were not previously accounted for as leases under Topic 840. An entity that elects this practical expedient should apply the practical expedient consistently to all of its existing or expired land easements that were not previously accounted for as leases under Topic 840. Once an entity adopts Topic 842, it should apply that Topic prospectively to all new (or modified) land easements to determine whether the arrangement should be accounted for as a lease. An entity that does not elect this practical expedient

10

should evaluate all existing or expired land easements in connection with the adoption of the new lease requirements in Topic 842 to assess whether they meet the definition of a lease. The amendments in this Update affect the amendments in Update 2016-02, which are not yet effective but may be early adopted. The effective date and transition requirements for the amendments are the same as the effective date and transition requirements in Update 2016-02, which is for annual periods beginning after December 15, 2018, and interim periods within those annual periods. Management is in the process of evaluating the impact of this Update.

Accounting Standards Update (ASU) 2018-2, "Income Statement - Reporting Comprehensive Income"

ASU 2018-02 applies to entities required to apply the provisions of Topic 220, Income Statement - Reporting Comprehensive Income, and has items of other comprehensive income for which the related tax effects are presented in other comprehensive income as required by GAAP. The amendments in this Update allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 (the "Tax Act"). Consequently, the amendments eliminate the stranded tax effects resulting from the Tax Act and will improve the usefulness of information reported to financial statement users. However, because the amendments only relate to the reclassification of the income tax effects of the Tax Act, the underlying guidance that requires the effect of a change in tax laws or rates to be included in income from continuing operations is not affected. The amendments in this Update also require certain disclosures about stranded tax effects. The amendments in this Update are effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption of the amendments in this Update is permitted, including adoption in any interim period. The amendments in this Update should be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Act is recognized. Management does not expect ASU 2018-2 to have a material impact on the Company's financial statements and disclosures.

NOTE 3: Fair Value Measurements

Financial Assets and Liabilities that are Measured at Fair Value on a Recurring Basis

The following table summarizes the financial assets and liabilities required to be measured at fair value on a recurring basis as of April 1, 2018 (in thousands):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)	Unobservable Inputs (Level 3)
Assets:
Money market instruments	$	7,958	—	$	—
Corporate bonds	—		380,621	—
Treasury bills	—		142,299	—
Asset-backed securities	—		131,678	—
Sovereign bonds	—		22,780	—
Municipal bonds	—		10,501	—
Agency bonds	—		5,931	—
Cash flow hedge forward contracts	—		—	—
Economic hedge forward contracts	—		4	—
Liabilities:
Cash flow hedge forward contracts	—		—	—
Economic hedge forward contracts	—		18	—
Contingent consideration liabilities	—		—	3,115

The Company’s money market instruments are reported at fair value based upon the daily market price for identical assets in active markets, and are therefore classified as Level 1.

The Company’s debt securities and forward contracts are reported at fair value based upon model-driven valuations in which all significant inputs are observable or can be derived from or corroborated by observable market data for substantially the full term of the asset or liability, and are therefore classified as Level 2. Management is responsible for estimating the fair value of these financial assets and liabilities, and in doing so, considers valuations provided by a large, third-party pricing service. For debt securities, this service maintains regular contact with market makers, brokers, dealers, and analysts to gather information on market movement, direction, trends, and other specific data. They use this information to structure yield curves for various types of debt securities and arrive at the daily valuations.

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COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The Company's forward contracts are typically traded or executed in over-the-counter markets with a high degree of pricing transparency. The market participants are generally large commercial banks.

The Company did not record an other-than-temporary impairment of these financial assets during the three-month period ended April 1, 2018.

The Company's contingent consideration liabilities are reported at fair value based upon probability-adjusted present values of the consideration expected to be paid, using significant inputs that are not observable in the market, and are therefore classified as Level 3. Key assumptions used in these estimates include probability assessments with respect to the likelihood of achieving certain revenue milestones. The fair values of these contingent consideration liabilities were calculated using discount rates consistent with the level of risk of achievement, and are remeasured each reporting period with changes in fair value recorded in "Other income (expense)" on the Consolidated Statements of Operations.

The following table summarizes the activity for the Company's liabilities measured at fair value using Level 3 inputs for the three-month period ended April 1, 2018 (in thousands):

Balance as of December 31, 2017	$	3,557
Fair value adjustment to Manatee contingent consideration	(675		)
Fair value adjustment to Chiaro contingent consideration	52
Fair value adjustment to GVi contingent consideration	181
Balance as of April 1, 2018	$	3,115

Non-financial Assets that are Measured at Fair Value on a Non-recurring Basis

Non-financial assets such as property, plant and equipment, goodwill, and intangible assets are required to be measured at fair value only when an impairment loss is recognized. The Company did not record an impairment charge related to these assets during the three-month period ended April 1, 2018.

NOTE 4: Cash, Cash Equivalents, and Investments

Cash, cash equivalents, and investments consisted of the following (in thousands):

	April 1, 2018		December 31, 2017
Cash	$	101,614	$	97,951
Money market instruments	7,958		8,631
Cash and cash equivalents	109,572		106,582
Treasury bills	138,695		150,371
Corporate bonds	108,313		47,395
Asset-backed securities	75,432		59,203
Municipal bonds	9,153		8,805
Sovereign bonds	6,036		21,579
Agency bonds	—		10,608
Short-term investments	337,629		297,961
Corporate bonds	272,308		296,014
Asset-backed securities	56,246		71,727
Sovereign bonds	16,744		13,147
Agency bonds	5,931		14,890
Treasury bills	3,604		23,459
Municipal bonds	1,348		4,204
Long-term investments	356,181		423,441
	$	803,382	$	827,984

Treasury bills consist of debt securities issued by the U.S. government; corporate bonds consist of debt securities issued by both domestic and foreign companies; asset-backed securities consist of debt securities collateralized by pools of receivables or loans with credit enhancement; municipal bonds consist of debt securities issued by state and local government entities; sovereign bonds consist of direct debt issued by foreign governments; and agency bonds consist of domestic or foreign obligations of government agencies and government sponsored enterprises that have government backing. All securities are denominated in U.S. Dollars.

12

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The following table summarizes the Company’s available-for-sale investments as of April 1, 2018 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Treasury bills	$	139,159	$	—	$	(464	)	$	138,695
Corporate bonds	108,533		50		(270		)	108,313
Asset-backed securities	75,710		5		(283		)	75,432
Municipal bonds	9,165		—		(12		)	9,153
Sovereign bonds	6,040		1		(5		)	6,036
Long-term:
Corporate bonds	272,345		797		(834		)	272,308
Asset-backed securities	56,573		14		(341		)	56,246
Sovereign bonds	16,779		38		(73		)	16,744
Agency bonds	5,930		1		—			5,931
Treasury bills	3,601		3		—			3,604
Municipal bonds	1,360		—		(12		)	1,348
	$	695,195	$	909	$	(2,294	)	$	693,810

The following table summarizes the Company’s gross unrealized losses and fair values for available-for-sale investments in an unrealized loss position as of April 1, 2018 (in thousands):

	Unrealized Loss Position For:
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	172,162	$	(812	)	$	23,693	$	(292	)	$	195,855	$	(1,104	)
Treasury bills	96,209		(277		)	42,487		(187		)	138,696		(464		)
Asset-backed securities	112,632		(614		)	2,640		(10		)	115,272		(624		)
Sovereign bonds	3,599		(9		)	8,730		(69		)	12,329		(78		)
Municipal bonds	4,196		(24		)	—		—			4,196		(24		)
Agency bonds	—		—			—		—			—		—
	$	388,798	$	(1,736	)	$	77,550	$	(558	)	$	466,348	$	(2,294	)

As of April 1, 2018, the Company did not recognize any other-than-temporary impairment of these investments. In its evaluation, management considered the type of security, the credit rating of the security, the length of time the security has been in a loss position, the size of the loss position, the Company's intent and ability to hold the security to expected recovery of value, and other meaningful information. The Company does not intend to sell, and is unlikely to be required to sell, any of these available-for-sale investments before their effective maturity or market price recovery.

The Company recorded gross realized gains and gross realized losses on the sale of debt securities totaling $55,000 and $33,000, respectively, during the three-month period ended April 1, 2018 and $88,000 and $23,000, respectively, during the three-month period ended April 2, 2017. These gains and losses are included in "Investment income" on the Consolidated Statement of Operations. Prior to the sale of these securities, unrealized gains and losses for these debt securities, net of tax, are recorded in shareholders’ equity as other comprehensive income (loss).

13

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The following table presents the effective maturity dates of the Company’s available-for-sale investments as of April 1, 2018 (in thousands):

	<1 year		1-2 Years		2-3 Years		3-4 Years		4-5 Years		5-7 Years		Total
Corporate bonds	$	108,313	$	116,223	$	97,412	$	36,342	$	18,961	$	3,370	$	380,621
Treasury bills	138,695		3,604		—		—		—		—		142,299
Asset-backed securities	75,432		35,411		6,923		6,504		2,336		5,072		131,678
Sovereign bonds	6,036		10,995		5,749		—		—		—		22,780
Municipal bonds	9,153		—		1,348		—		—		—		10,501
Agency bonds	—		—		—		—		5,931		—		5,931
	$	337,629	$	166,233	$	111,432	$	42,846	$	27,228	$	8,442	$	693,810

NOTE 5: Inventories

Inventories consisted of the following (in thousands):

	April 1, 2018		December 31, 2017
Raw materials	$	42,759	$	33,927
Work-in-process	2,192		2,114
Finished goods	51,448		31,882
	$	96,399	$	67,923

NOTE 6:  Intangible Assets

Amortized intangible assets consisted of the following (in thousands):

	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Distribution networks	$	38,060	$	38,060	$	—
Completed technologies	13,687		4,791		8,896
Customer relationships	8,607		5,330		3,277
Non-compete agreements	370		123		247
Balance as of April 1, 2018	$	60,724	$	48,304	$	12,420
	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Distribution networks	$	38,060	$	38,060	$	—
Completed technologies	13,687		4,181		9,506
Customer relationships	8,607		5,202		3,405
Non-compete agreements	370		92		278
Balance as of December 31, 2017	$	60,724	$	47,535	$	13,189

As of April 1, 2018, estimated future amortization expense related to intangible assets is as follows (in thousands):

Year Ended December 31,	Amount
Remainder of fiscal 2018	$	2,307
2019	2,701
2020	2,185
2021	2,017
2022	1,691
2023	989
Thereafter	530
	$	12,420

14

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 7: Warranty Obligations

The Company records the estimated cost of fulfilling product warranties at the time of sale based upon historical costs to fulfill claims. Obligations may also be recorded subsequent to the time of sale whenever specific events or circumstances impacting product quality become known that would not have been taken into account using historical data. While we engage in extensive product quality programs and processes, including actively monitoring and evaluating the quality of our component suppliers and third-party contract manufacturers, the Company’s warranty obligation is affected by product failure rates, material usage, and service delivery costs incurred in correcting a product failure. An adverse change in any of these factors may result in the need for additional warranty provisions. Warranty obligations are included in “Accrued expenses” on the Consolidated Balance Sheets.

The changes in the warranty obligation were as follows (in thousands):

Balance as of December 31, 2017	$	4,701
Provisions for warranties issued during the period	697
Fulfillment of warranty obligations	(802		)
Foreign exchange rate changes	116
Balance as of April 1, 2018	$	4,712

NOTE 8: Derivative Instruments

The Company’s foreign currency risk management strategy is principally designed to mitigate the potential financial impact of changes in the value of transactions and balances denominated in foreign currencies resulting from changes in foreign currency exchange rates. Currently, the Company enters into two types of hedges to manage this risk. The first are economic hedges which utilize foreign currency forward contracts with maturities of up to 45 days to manage the exposure to fluctuations in foreign currency exchange rates arising primarily from foreign-denominated receivables and payables. The gains and losses on these derivatives are intended to be offset by the changes in the fair value of the assets and liabilities being hedged. These economic hedges are not designated as hedging instruments for hedge accounting treatment. The second are cash flow hedges which utilize foreign currency forward contracts with maturities of up to 18 months to hedge specific forecasted transactions of the Company's foreign subsidiaries with the goal of protecting the Company's budgeted revenues and expenses against foreign currency exchange rate changes compared to its budgeted rates. These cash flow hedges are designated as hedging instruments for hedge accounting treatment.

The Company had the following outstanding forward contracts (in thousands):

	April 1, 2018			December 31, 2017
Currency	Notional Value	USD Equivalent		Notional Value	USD Equivalent
Derivatives Not Designated as Hedging Instruments:
Japanese Yen	565,000	$	5,299	455,000	$	4,049
Swiss Franc	1,600	2,072		1,365	1,401
British Pound	1,300	1,824		1,650	2,232
Hungarian Forint	400,000	1,576		545,000	2,110
Taiwanese Dollar	43,000	1,480		37,725	1,278
Korean Won	655,000	616		1,825,000	1,708

15

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

Information regarding the fair value of the outstanding forward contracts was as follows (in thousands):

	Asset Derivatives					Liability Derivatives
	Balance	Fair Value				Balance	Fair Value
	Sheet Location	April 1, 2018		December 31, 2017		Sheet Location	April 1, 2018		December 31, 2017
Derivatives Designated as Hedging Instruments:
Cash flow hedge forward contracts	Prepaid expenses and other current assets	$	—	$	—	Accrued expenses	$	—	$	—
Economic hedge forward contracts	Prepaid expenses and other current assets	$	4	$	16	Accrued expenses	$	18	$	13

The following table presents the gross activity for all derivative assets and liabilities which were presented on a net basis on the Consolidated Balance Sheets due to the right of offset with each counterparty (in thousands):

Asset Derivatives					Liability Derivatives
	April 1, 2018		December 31, 2017			April 1, 2018		December 31, 2017
Gross amounts of recognized assets	$	4	$	16	Gross amounts of recognized liabilities	$	18	$	13
Gross amounts offset	—		—		Gross amounts offset	—		—
Net amount of assets presented	$	4	$	16	Net amount of liabilities presented	$	18	$	13

Information regarding the effect of derivative instruments on the consolidated financial statements was as follows (in thousands):

	Location in Financial Statements	Three-months Ended
		April 1, 2018			April 2, 2017
Derivatives Designated as Hedging Instruments:
Gains (losses) recorded in shareholders' equity (effective portion)	Accumulated other comprehensive income (loss), net of tax	$	—		$	10
Gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations (effective portion)	Revenue	$	—		$	(55	)
	Research, development, and engineering expenses	—			3
	Selling, general, and administrative expenses	—			8
	Total gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations	$	—		$	(44	)
Gains (losses) recognized in current operations (ineffective portion and discontinued derivatives)	Foreign currency gain (loss)	$	—		$	—
Derivatives Not Designated as Hedging Instruments:
Gains (losses) recognized in current operations	Foreign currency gain (loss)	$	(310	)	$	(81	)

16

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 9: Revenue Recognition

On January 1, 2018, the Company adopted Accounting Standards Codification (ASC) 606, "Revenue from Contracts with Customers," using the full retrospective method to present all periods reported on a consistent basis. Accordingly, prior-period results have been restated to apply the provisions of this ASC.

As a result of this adoption, revenue for software-only products sold as part of multiple-deliverable arrangements are no longer deferred when vendor-specific objective evidence of fair value does not exist for the undelivered elements of the arrangement. This change results in earlier recognition of revenue. In addition, certain of the Company’s product accessory sales, which were reported on a net basis, are now reported on a gross basis as a result of applying the expanded guidance in the new standard related to principal versus agent considerations. This change results in the Company reporting higher revenue and higher cost of revenue when these sales are reported on a gross basis, although the gross margin dollars do not change. Furthermore, for arrangements that include customer-specified acceptance criteria, revenue is recognized when the Company can objectively determine that control has been transferred to the customer in accordance with the agreed-upon specifications in the contract, which may occur before formal customer acceptance. This change primarily impacts revenue recognition for arrangements in the logistics industry where certain customer solutions include installed ID products and results in earlier recognition of revenue.

The adoption of the standard impacted our previously-reported results as follows (in thousands):

Statement of Operations
	Three-months ended
	April 2, 2017
	As previously reported			Adjustment			As restated
Revenue	$	134,942		$	4,097		$	139,039
Cost of revenue	28,225			4,307			32,532
Gross margin	106,717			(210		)	106,507
Operating income	37,426			(210		)	37,216
Income before income tax expense	39,445			(210		)	39,235
Income tax expense (benefit)	(6,210		)	(26		)	(6,236		)
Net income	$	45,655		$	(184	)	$	45,471
Net income per weighted-average common and common-equivalend share:
Basic	$	0.26		$	—		$	0.26
Diluted	$	0.26		$	(0.01	)	$	0.25

Balance Sheet
	December 31, 2017
	As previously reported		Adjustment			As restated
Prepaid expenses and other current assets	$	30,800	$	(117	)	$	30,683
Accrued income taxes	11,391		112			11,503
Deferred revenue and customer deposits	9,969		(549		)	9,420
Retained earnings	668,267		320			668,587

17

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The following table summarizes disaggregated revenue information by geographic area based upon the customer's country of domicile (in thousands):

	Three-months ended
	April 1, 2018		April 2, 2017
Americas	$	59,217	$	42,540
Europe	56,203		43,107
Greater China	27,159		22,706
Other Asia	26,988		30,686
	$	169,567	$	139,039

The following table summarizes disaggregated revenue information by revenue type (in thousands):

	Three-months ended
	April 1, 2018		April 2, 2017
Standard products and services	$	158,399	$	133,017
Application-specific customer solutions	11,168		6,022
	$	169,567	$	139,039

Costs to Fulfill a Contract

Costs to fulfill a contract are included in "Prepaid expenses and other current assets" on the Consolidated Balance Sheet and amounted to $4,615,000 and $3,230,000 as of April 1, 2018 and December 31, 2017, respectively.

Accounts Receivable, Contract Assets, and Contract Liabilities

Accounts receivable represent amounts billed and currently due from customers which are reported at their net estimated realizable value. The Company maintains reserves against its accounts receivable for potential credit losses. Credit losses recognized on accounts receivable were immaterial for the three-month periods ended April 1, 2018 and April 2, 2017, respectively. Contract assets consist of unbilled revenue which arises when revenue is recognized in advance of billing for certain application-specific customer solutions contracts. Contract liabilities consist of deferred revenue and customer deposits which arise when amounts are billed to or collected from customers in advance of revenue recognition.

The following table summarizes the deferred revenue and customer deposits activity for the three-month period ended April 1, 2018 (in thousands):

	Amount
Balance as of December 31, 2017	$	9,420
Increases to deferred revenue and customer deposits	11,751
Recognition of revenue	(5,875		)
Foreign exchange rate changes	208
Balance as of April 1, 2018	$	15,504

As a practical expedient, the Company has elected not to disclose the aggregate amount of the transaction price allocated to unsatisfied performance obligations, as our contracts have an original expected duration of less than one year.

18

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 10: Stock-Based Compensation Expense

The Company’s share-based payments that result in compensation expense consist of stock option grants and restricted stock awards. As of April 1, 2018, the Company had 10,160,452 shares available for grant. Stock options are granted with an exercise price equal to the market value of the Company’s common stock at the grant date and generally vest over four or five years based upon continuous service and expire ten years from the grant date. Restricted stock awards are granted with an exercise price equal to the market value of the Company's common stock at the time of grant. Conditions of the award may be based on continuing employment and/or achievement of pre-established performance goals and objectives. Vesting for performance-based restricted stock awards and time-based restricted stock awards must not be less than one year and three years, respectively; however, awards with time-based vesting may become vested incrementally over such three-year period.

The following table summarizes the Company’s stock option activity for the three-month period ended April 1, 2018:

	Shares (in thousands)		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2017	12,726		$	25.24
Granted	2,043		56.44
Exercised	(697	)	15.96
Forfeited or expired	(68	)	25.84
Outstanding as of April 1, 2018	14,004		$	30.25	7.9	$	317,169
Exercisable as of April 1, 2018	4,879		$	19.88	6.5	$	156,676
Options vested or expected to vest as of April 1, 2018 (1)	12,377		$	28.99	7.8	$	294,379

(1) In addition to the vested options, the Company expects a portion of the unvested options to vest at some point in the future. Options expected to vest are calculated by applying an estimated forfeiture rate to the unvested options.

The fair values of stock options granted in each period presented were estimated using the following weighted-average assumptions:

	Three-months Ended
	April 1, 2018		April 2, 2017
Risk-free rate	2.9	%	2.4	%
Expected dividend yield	0.32	%	0.39	%
Expected volatility	39	%	41	%
Expected term (in years)	5.3		5.3

Risk-free rate

The risk-free rate was based upon a treasury instrument whose term was consistent with the contractual term of the option.

Expected dividend yield

Generally, the current dividend yield is calculated by annualizing the cash dividend declared by the Company’s Board of Directors and dividing that result by the closing stock price on the grant date. 

Expected volatility

The expected volatility was based upon a combination of historical volatility of the Company’s common stock over the contractual term of the option and implied volatility for traded options of the Company’s stock.

Expected term

The expected term was derived from the binomial lattice model from the impact of events that trigger exercises over time.

19

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The Company stratifies its employee population into two groups: one consisting of senior management and another consisting of all other employees. The Company currently applies an estimated annual forfeiture rate of 8% to all unvested options for senior management and a rate of 12% for all other employees. The Company revised its estimated forfeiture rates in the three-month period ended April 1, 2018, resulting in an increase to compensation expense of $1,283,000. The Company also revised its estimated forfeiture rates in the three-month period ended April 2, 2017, resulting in an decrease to compensation expense of $673,000.

The weighted-average grant-date fair values of stock options granted during the three-month periods ended April 1, 2018 and April 2, 2017 were $21.62 and $14.95, respectively.

The total intrinsic values of stock options exercised for the three-month periods ended April 1, 2018 and April 2, 2017 were $28,088,000 and $53,043,000, respectively. The total fair values of stock options vested for the three-month periods ended April 1, 2018 and April 2, 2017 were $25,674,000 and $17,987,000, respectively.

As of April 1, 2018, total unrecognized compensation expense related to non-vested stock options was $63,749,000, which is expected to be recognized over a weighted-average period of 2.02 years.

The following table summarizes the Company's restricted stock activity for the three-month period ended April 1, 2018:

	Shares (in thousands)	Weighted-Average Grant Fair Value		Aggregate Intrinsic Value (in thousands)(1)
Nonvested as of December 31, 2017	20	$	17.03
Granted	—	—
Vested	—	—
Forfeited or expired	—	—
Nonvested as of April 1, 2018	20	$	17.03	$	1,040

(1) Fair market value as of April 1, 2018.

The fair values of restricted stock awards granted were determined based upon the market value of the Company's common stock at the time of grant. The initial cost is then amortized over the period of vesting until the restrictions lapse. These restricted shares will be fully vested in 2018. Participants are entitled to dividends on restricted stock awards, but only receive those amounts if the shares vest. The sale or transfer of these shares is restricted during the vesting period.

The total stock-based compensation expense and the related income tax benefit recognized for the three-month period ended April 1, 2018 were $13,194,000 and $2,347,000, respectively, and for the three-month period ended April 2, 2017 were $7,483,000 and $2,439,000, respectively. No compensation expense was capitalized as of April 1, 2018 or December 31, 2017.

The following table presents the stock-based compensation expense by caption for each period presented on the Consolidated Statements of Operations (in thousands):

	Three-months Ended
	April 1, 2018		April 2, 2017
Cost of revenue	$	797	$	430
Research, development, and engineering	4,815		2,610
Selling, general, and administrative	7,582		4,443
	$	13,194	$	7,483

20

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 11: Stock Repurchase Program

In April 2017, the Company's Board of Directors authorized the repurchase of $100,000,000 of the Company's common stock. As of April 1, 2018, the Company repurchased 1,744,000 shares at a cost of $100,000,000 under this program, including 803,000 shares at a cost of $45,200,000 in the three-month period ended April 1, 2018. Stock repurchases under this April 2017 program are now complete. In February 2018, the Company's Board of Directors authorized the repurchase of an additional $150,000,000 of the Company's common stock. As of April 1, 2018, the Company repurchased 453,000 shares at a cost of $24,002,000 under this program, leaving a remaining authorized balance of $125,998,000. Total stock repurchases for the three-month period ended April 1, 2018 amounted to $69,202,000. The Company may repurchase shares under this program in future periods depending upon a variety of factors, including, among other things, the impact of dilution from employee stock options, stock price, share availability, and cash requirements.

NOTE 12: Taxes

A reconciliation of the United States federal statutory corporate tax rate to the Company’s income tax expense, or effective tax rate, was as follows:

	Three-months Ended
	April 1, 2018		April 2, 2017
Income tax provision at federal statutory corporate tax rate	21	%	35	%
State income taxes, net of federal benefit	1	%	1	%
Foreign tax rate differential	(7	)%	(18	)%
Tax credit	(1	)%	(1	)%
Discrete tax benefit related to stock option exercises	(13	)%	(33	)%
Other discrete tax events	—	%	(1	)%
Other	1	%	1	%
Income tax provision	2	%	(16	)%

On December 22, 2017, the United States Congress passed and the President signed into law the Tax Act. The Tax Act included a decrease in the U.S. federal statutory corporate tax rate from 35% to 21%, a one-time transition tax on unrepatriated foreign earnings, and limits on certain deductions. The Company made what it considers to be a reasonable estimate of the impact of the Tax Act in its financial statements for the year ended December 31, 2017. The Company has not recorded any changes to this estimate for the three-month period ended April 1, 2018.

The Securities and Exchange Commission (SEC) released Staff Accounting Bulletin (SAB) No. 118 to provide guidance to companies on how to implement the accounting and disclosure changes as a result of the Tax Act. The SEC staff guidance has recognized that, due to the complexity and timing of the release of the Tax Act, the accounting for this change in the law may be incomplete upon issuance of a company's financial statements. This significant estimate is highly judgmental and changes to this estimate could result in material charges or credits in future reporting periods. U.S. Treasury regulations and administrative guidance have not been finalized as of the date of these financial statements. The issuance of final regulations may require the Company to revise its estimates of earnings and profits, as well as certain deferred taxes as required. The Tax Act subjects the Company to current tax on Global Intangible Low-Taxed Income (GILTI) earned by certain foreign subsidiaries.  The Company can make an accounting policy election to either recognize deferred taxes for temporary differences expected to reverse as GILTI in future years or provide for the tax expense related to GILTI resulting from those items in the year the tax is incurred. As of the date of this report, the Company is still evaluating the guidance and has not made a policy election related to the treatment of the GILTI tax. The Company will continue to gather and analyze information on historical unrepatriated foreign earnings and to monitor state laws relating to this income to finalize both the federal and state tax impact.

The majority of income earned outside of the United States is indefinitely reinvested to provide funds for international expansion. The Company is tax resident in numerous jurisdictions around the world and has identified its major jurisdictions as the United States, Ireland, and China. The statutory tax rate is 12.5% in Ireland and 25% in China, compared to the U.S. federal statutory corporate tax rate of 21%. International rights to certain of the Company's intellectual property are held by a subsidiary whose legal jurisdiction does not tax this income, resulting in a foreign effective tax rate that is lower than the above mentioned statutory rates, although the reduced taxes overseas have

21

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

been partially offset by changes in U.S. tax law. These differences resulted in a decrease in the effective tax rate by 7 and 18 percentage points for the three-month periods ended April 1, 2018 and April 2, 2017, respectively.

The excess tax benefit arising from the difference between the deduction for tax purposes and the compensation cost recognized for financial reporting purposes from stock option exercises resulted in a decrease of the effective tax rate by 13 and 33 percentage points for the three-month periods ended April 1, 2018 and April 2, 2017, respectively.

On January 1, 2018, the Company adopted Accounting Standard Update (ASU) 2016-16, "Income Taxes - Intra-Entity Transfers of Assets Other than Inventory." This Update requires the recognition of deferred income taxes for an intra-entity transfer of an asset other than inventory. As a result of this ASU, the Company recorded $5,961,000 through a cumulative-effect adjustment directly to retained earnings at the beginning of fiscal year 2018.

During the three-month period ended April 1, 2018, the Company recorded a $484,000 increase in reserves for income taxes, net of deferred tax benefit. Estimated interest and penalties included in these amounts totaled $70,000 for the three-month period ended April 1, 2018.

The Company’s reserve for income taxes, including gross interest and penalties, was $7,986,000 as of April 1, 2018, which included $6,958,000 classified as a non-current liability and $1,028,000 recorded as a reduction to non-current deferred tax assets. The amount of gross interest and penalties included in these balances was $847,000. If the Company’s tax positions were sustained or the statutes of limitations related to certain positions expired, these reserves would be released and income tax expense would be reduced in a future period. As a result of the expiration of certain statutes of limitations, there is a potential that a portion of these reserves could be released, which would decrease income tax expense by approximately $1,100,000 to $1,200,000 over the next twelve months.

The Company has defined its major tax jurisdictions as the United States, Ireland and China, and within the United States, Massachusetts. Within the United States, the tax years 2014 through 2017 remain open to examination by the Internal Revenue Service and various state tax authorities. The tax years 2013 through 2017 remain open to examination by various taxing authorities in other jurisdictions in which the Company operates.

NOTE 13: Weighted-Average Shares

Weighted-average shares were calculated as follows (in thousands):

	Three-months Ended
	April 1, 2018	April 2, 2017
Basic weighted-average common shares outstanding	173,280	172,646
Effect of dilutive stock options	6,361	5,708
Weighted-average common and common-equivalent shares outstanding	179,641	178,354

Stock options to purchase 1,339,000 and 1,648,000 shares of common stock, on a weighted-average basis, were outstanding during the three-month periods ended April 1, 2018 and April 2, 2017, respectively, but were not included in the calculation of dilutive net income per share because they were anti-dilutive.

NOTE 14: Subsequent Events

On April 25, 2018, the Company's shareholders approved an amendment to the Company's Articles of Organization to increase the authorized number of shares of common stock from 200,000,000 to 300,000,000. In addition, on April 25, 2018, the Company's shareholders approved an amendment and restatement of the Company's 2001 General Stock Option Plan which provides for an increase in the number of available shares by 10,000,000.

On April 30, 2018, the Company’s Board of Directors declared a cash dividend of $0.045 per share. The dividend is payable June 1, 2018 to all shareholders of record as of the close of business on May 18, 2018.

22

ITEM 2: MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Forward-Looking Statements

Certain statements made in this report, as well as oral statements made by the Company from time to time, constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Readers can identify these forward-looking statements by our use of the words “expects,” “anticipates,” “estimates,” “believes,” “projects,” “intends,” “plans,” “will,” “may,” “shall,” “could,” “should,” and similar words and other statements of a similar sense. These statements are based upon our current estimates and expectations as to prospective events and circumstances, which may or may not be in our control and as to which there can be no firm assurances given. These forward-looking statements, which include statements regarding business and market trends, future financial performance, customer order rates and timing of related revenue, expected areas of growth, emerging markets, future product mix, research and development activities, investments, and strategic plans, involve known and unknown risks and uncertainties that could cause actual results to differ materially from those projected. Such risks and uncertainties include: (1) the loss of a large customer; (2) current and future conditions in the global economy; (3) the reliance on revenue from the consumer electronics or automotive industries; (4) the inability to penetrate new markets; (5) the inability to achieve significant international revenue; (6) fluctuations in foreign currency exchange rates and the use of derivative instruments; (7) information security breaches or business system disruptions; (8) the inability to attract and retain skilled employees; (9) the failure to effectively manage our growth; (10) the reliance upon key suppliers to manufacture and deliver critical components for our products; (11) the failure to effectively manage product transitions or accurately forecast customer demand; (12) the inability to design and manufacture high-quality products; (13) the technological obsolescence of current products and the inability to develop new products; (14) the failure to properly manage the distribution of products and services; (15) the inability to protect our proprietary technology and intellectual property; (16) our involvement in time-consuming and costly litigation; (17) the impact of competitive pressures; (18) the challenges in integrating and achieving expected results from acquired businesses; (19) potential impairment charges with respect to our investments or for acquired intangible assets or goodwill; and (20) exposure to additional tax liabilities. The foregoing list should not be construed as exhaustive and we encourage readers to refer to the detailed discussion of risk factors included in Part I - Item 1A of the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2017. The Company cautions readers not to place undue reliance upon any such forward-looking statements, which speak only as of the date made. The Company disclaims any obligation to subsequently revise forward-looking statements to reflect the occurrence of anticipated or unanticipated events or circumstances after the date such statements are made.

Executive Overview

Cognex Corporation is a leading worldwide provider of machine vision products that capture and analyze visual information in order to automate tasks, primarily in manufacturing processes, where vision is required. In addition to product revenue derived from the sale of machine vision products, the Company also generates revenue by providing maintenance and support, consulting, and training services to its customers; however, service revenue accounted for less than 10% of total revenue for all periods presented.

The Company’s customers are predominantly in the factory automation market. Factory automation customers purchase Cognex products and incorporate them into their manufacturing processes. Customers in the consumer electronics and automotive industries contribute the largest percentage to the Company's factory automation revenue. Most manufacturers can achieve better quality and manufacturing efficiency by using machine vision, and therefore, this market also includes a broad base of customers across a variety of other industries, including consumer products, food and beverage, medical devices, and pharmaceuticals. Factory automation customers also purchase Cognex products for use outside of the manufacturing process, such as using ID products in logistics automation for package sorting and distribution. A small percentage of the Company’s customers are in the semiconductor and electronics capital equipment market. These customers purchase Cognex products and integrate them into the automation equipment that they manufacture and then sell to their customers to either make semiconductor chips or assemble printed circuit boards.

On January 1, 2018, the Company adopted Accounting Standards Codification (ASC) 606, "Revenue from Contracts with Customers," using the full retrospective method to present all periods reported on a consistent basis. Accordingly, prior period revenue, cost of revenue, and gross profit have been restated to apply the provisions of this ASC.

Revenue for the first quarter of 2018 totaled $169,567,000, representing an increase of 22% from the first quarter of 2017 driven primarily by strong sales in the logistics and automotive industries. A shift in revenue mix toward service-

23

related revenue resulted in a slight decline in the gross margin percentage to 76% of revenue in the first quarter of 2018 compared to 77% of revenue in the first quarter of 2017. Operating expenses increased by 37% over the prior year due principally to the impact of headcount additions to support the higher revenue level and future growth plans. The operating income margin was 20% of revenue in the first quarter of 2018 compared to 27% of revenue in the first quarter of 2017. A lower tax benefit related to stock option exercises than the prior year resulted in a net income margin of 22% of revenue in the first quarter of 2018 compared to 33% of revenue in the first quarter of 2017. Net income per diluted share was $0.21 in the first quarter of 2018 compared to $0.25 in the first quarter of 2017.

Results of Operations

As foreign currency exchange rates are a factor in understanding period-to-period comparisons, we believe the presentation of results on a constant-currency basis in addition to reported results helps improve investors’ ability to understand our operating results and evaluate our performance in comparison to prior periods. We also use results on a constant-currency basis as one measure to evaluate our performance. Constant-currency information compares results between periods as if exchange rates had remained constant period-over-period. We generally refer to such amounts calculated on a constant-currency basis as excluding the impact of foreign currency exchange rate changes. Results on a constant-currency basis are not in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) and should be considered in addition to, and not as a substitute for, results prepared in accordance with U.S. GAAP.

Revenue

Revenue for the first quarter of 2018 totaled $169,567,000, representing an increase of $30,528,000, or 22%, from the first quarter of 2017. Changes in foreign currency exchange rates, primarily related to the translation of Euro-denominated revenue to U.S. Dollars, accounted for approximately 5% of the revenue increase. The remaining constant-currency increase of 17% was driven by higher sales in the logistics and automotive industries, partially offset by lower sales in the consumer electronics industry.

As of the date of this report, we expect revenue for the second quarter of 2018 to increase sequentially from the first quarter of 2018. Although we expect this growth to come from a variety of industries, the most notable increase is expected to come from the consumer electronics industry due to the quarterly timing of revenue from large customer orders in this industry, which in turn is dependent upon the product introduction cycles of these customers. Despite the level of quarterly revenue currently anticipated from customers in the consumer electronics industry in the second quarter of 2018, we expect consumer electronics revenue to be lower for the full year 2018 as compared to 2017.

Gross Margin

Gross margin as a percentage of revenue was 76% for the first quarter of 2018 compared to 77% for the first quarter of 2017. Although a higher volume of products sold resulted in manufacturing efficiencies, this favorable impact was offset by a greater percentage of service-related revenue, including revenue in the logistics industry where certain customer solutions included installation services with relatively lower margins. In addition, logistics revenue for the first quarter of 2018 included large customer orders that received volume discounts.

The Company's gross margin percentage has ranged from the mid-to-high 70s for the past several years. As of the date of this report, we expect the gross margin percentage to be closer to the mid-point of this range in the second quarter of 2018 due to anticipated higher revenue from a material customer under a preferred pricing arrangement.

Operating Expenses

Research, Development, and Engineering Expenses increased by $8,306,000, or 36%, for the three-month period as detailed in the table below (in thousands).

	Three-month period
RD&E expenses in the first quarter of 2017	$	22,770
Personnel-related costs	2,739
Stock-based compensation expense	2,129
Prototyping materials	1,054
Foreign currency exchange rate changes	916
Other	1,468
RD&E expenses in the first quarter of 2018	$	31,076

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RD&E expenses increased due to higher personnel-related costs resulting primarily from headcount additions to support new product initiatives and the higher revenue level. The Company also incurred higher spending on prototyping materials to support new product initiatives. In addition, stock-based compensation expense was higher than the prior year due to a higher valuation of stock options granted during the first quarter of 2018. Changes in foreign currency exchange rates also contributed to the increase, as expenses denominated in foreign currencies were translated to U.S. Dollars.

RD&E expenses as a percentage of revenue were 18% and 16% for the first quarters of 2018 and 2017, respectively. We believe that a continued commitment to RD&E activities is essential in order to maintain or achieve product leadership with our existing products and to provide innovative new product offerings, as well as to provide engineering support for large customers. In addition, we consider our ability to accelerate time to market for new products to be critical to our revenue growth. Therefore, we expect to continue to make significant RD&E investments in the future, and we target our RD&E spending to be between 10% and 15% of revenue on an annual basis. This quarterly percentage is impacted by revenue levels and investing cycles.

Selling, General, and Administrative Expenses

Selling, general, and administrative (SG&A) expenses increased by $17,176,000, or 37%, for the three-month period as detailed in the table below (in thousands).

	Three-month period
SG&A expenses in the first quarter of 2017	$	46,521
Personnel-related costs	9,456
Stock-based compensation expense	3,013
Foreign currency exchange rate changes	2,082
Depreciation expense	1,056
Other	1,569
SG&A expenses in the first quarter of 2018	$	63,697

SG&A expenses increased due to higher personnel-related costs resulting primarily from headcount additions, principally sales personnel. In addition to salaries and fringe benefits, these personnel-related costs included sales commissions and travel expenses related to the additional headcount. In addition, stock-based compensation expense was higher than the prior year due to a higher valuation of stock options granted during the first quarter of 2018. Changes in foreign currency exchange rates also contributed to the increase, as expenses denominated in foreign currencies were translated to U.S. Dollars. Depreciation expense was higher than the prior year due primarily to information technology investments in infrastructure, security, and business applications.

Non-operating Income (Expense)

The Company recorded foreign currency losses of $134,000 and $263,000 for the first quarters of 2018 and 2017, respectively. Foreign currency gains and losses result primarily from the revaluation and settlement of accounts receivable, accounts payable, and intercompany balances that are reported in one currency and collected in another.

Investment income increased by $1,228,000, or 61%, from the first quarter of 2017. The increase was due to higher yields on the Company's portfolio of debt securities, as well as additional funds available for investment.

The Company recorded other income of $277,000 and $270,000 for the first quarters of 2018 and 2017, respectively. Other income (expense) includes fair value adjustments of contingent consideration liabilities arising from business acquisitions, as well as rental income, net of associated expenses, from leasing space in buildings adjacent to the Company’s corporate headquarters.

Income Tax Expense

The Company’s effective tax rate was an expense of 2% of pre-tax income for the first quarter of 2018 and a benefit of 16% of pre-tax income for the first quarter of 2017.

The effective tax rate included a decrease in tax expense of $4,935,000 in the first quarter of 2018 and $13,167,000 in the first quarter of 2017 from the excess tax benefit arising from the difference between the deduction for tax purposes and the compensation cost recognized for financial reporting purposes from stock option exercises. The Company cannot predict the level of stock option exercises by employees in future periods.

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Excluding the impact of these discrete tax events, the Company’s effective tax rate was approximately 15% for the first quarter of 2018 and 18% for the first quarter of 2017. This decrease in the effective tax rate was primarily due to the impact of the Tax Cuts and Job Act of 2017 (the "Tax Act") that was signed into law on December 22, 2017. This Tax Act included a decrease in the U.S. federal statutory corporate tax rate from 35% to 21%.

The majority of income earned outside of the United States is indefinitely reinvested to provide funds for international expansion. The Company is tax resident in numerous jurisdictions around the world and has identified its major tax jurisdictions as the United States, Ireland, and China. The statutory tax rate is 12.5% in Ireland and 25% in China. International rights to certain of the Company’s intellectual property are held by a subsidiary whose legal jurisdiction does not tax this income, resulting in a foreign effective tax rate lower than the above mentioned statutory rates. The Company has not yet determined how the Tax Act will impact its financial statement assertion related to indefinite reinvestment in future years.

Liquidity and Capital Resources

The Company has historically been able to generate positive cash flow from operations, which has funded its operating activities and other cash requirements and has resulted in an accumulated cash and investment balance of $803,382,000 as of April 1, 2018. The Company has established guidelines relative to credit ratings, diversification, and maturities of its investments that maintain liquidity.

The Company’s cash requirements during the first quarter of 2018 were met with positive cash flows from operations, investment maturities, and the proceeds from stock option exercises. Cash requirements consisted of operating activities, investment purchases, the repurchase of common stock, the payment of dividends, and capital expenditures. Operating cash inflows included the collection of a significant amount of accounts receivable from a material customer in the consumer electronics industry. Operating cash outflows included the purchase of inventory for large customer orders already received or anticipated to be received that are expected to ship and generate revenue later in 2018, as well as the payment of company bonuses that were earned and accrued in 2017.

Capital expenditures in the first quarter of 2018 totaled $13,270,000 and consisted primarily of computer hardware and software, manufacturing test equipment related to new product introductions, and improvements made to the Company's headquarters building in Natick, Massachusetts and distribution center in Cork, Ireland. Cumulative capital expenditures since the second quarter of 2017 related to application development activities for a new Enterprise Resource Planning (ERP) system totaled approximately $8,000,000 as of April 1, 2018. The Company expects to incur an additional $2,000,000 in capital expenditures related to the ERP system in the second quarter of 2018, resulting in a $10,000,000 capital asset that the Company expects to be placed into service at the beginning of the third quarter of 2018 and depreciate over a ten year estimated useful life.

In April 2017, the Company's Board of Directors authorized the repurchase of $100,000,000 of the Company's common stock. As of April 1, 2018, the Company repurchased 1,744,000 shares at a cost of $100,000,000 under this program, including 803,000 shares at a cost of $45,200,000 in the first quarter of 2018. Stock repurchases under this April 2017 program are now complete. In February, 2018, the Company's Board of Directors authorized the repurchase of an additional $150,000,000 of the Company's common stock. As of April 1, 2018, the Company repurchased 453,000 shares at a cost of $24,002,000 under this program, leaving a remaining authorized balance of $125,998,000. Total stock repurchases in the first quarter of 2018 amounted to $69,202,000. The Company may repurchase shares under this program in future periods depending on a variety of factors, including, among other things, the impact of dilution from employee stock options, stock price, share availability, and cash requirements.

The Company’s Board of Directors declared and paid a cash dividend of $0.045 per share in the first quarter of 2018, amounting to $7,787,000. Future dividends will be declared at the discretion of the Company’s Board of Directors and will depend upon such factors as the Board deems relevant including, among other things, the Company’s ability to generate positive cash flows from operations.

The Company’s business strategy includes selective expansion into new machine vision markets and applications through the acquisition of businesses and technologies. The Company has completed seven business acquisitions since August 2015, none of which are significant individually or in the aggregate to the Company's financial positions or operating results. Certain of these acquisitions have contractual obligations for deferred cash payments, contingent cash payments tied to performance, and special incentive cash payments tied to employment, none of which are material individually or in the aggregate to the Company's cash flows.

The Company believes that its existing cash and investment balances, together with cash flow from operations, will be sufficient to meet its operating, investing, and financing activities for the next twelve months. As of April 1, 2018, the Company had $803,382,000 in cash and investments. In addition, Cognex has no long-term debt and does not

26

anticipate needing debt financing in the near future. We believe that our strong cash position has put us in a relatively good position with respect to our longer-term liquidity needs.

New Pronouncements

Refer to Part I - Note 2 within this Form 10-Q, for a full description of recently issued accounting pronouncements including the expected dates of adoption and the expected impact on the financial position and results of operations of the Company.

ITEM 3: QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

There have been no material changes to the Company’s exposures to market risk since December 31, 2017.

ITEM 4: CONTROLS AND PROCEDURES

As required by Rules 13a-15 and 15d-15 of the Securities Exchange Act of 1934, the Company has evaluated, with the participation of management, including the Chief Executive Officer and the Chief Financial Officer, the effectiveness of its disclosure controls and procedures (as defined in such rules) as of the end of the period covered by this report. Based on such evaluation, the Chief Executive Officer and Chief Financial Officer concluded that such disclosure controls and procedures were effective as of that date. From time to time, the Company reviews its disclosure controls and procedures, and may from time to time make changes aimed at enhancing their effectiveness and to ensure that the Company’s systems evolve with its business. There was no change in the Company’s internal control over financial reporting that occurred during the quarter ended April 1, 2018 that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

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PART II: OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Various claims and legal proceedings generally incidental to the normal course of business are pending or threatened on behalf of or against the Company. While we cannot predict the outcome of these matters, we believe that any liability arising from them will not have a material adverse effect on our financial position, liquidity, or results of operations.

ITEM 1A. RISK FACTORS

For a list of factors that could affect the Company’s business, results of operations, and financial condition, see the risk factors discussion provided in Part I—Item 1A of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

The following table sets forth information with respect to purchases by the Company of shares of its common stock during the three-month period ended April 1, 2018:

	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (1)	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs
January 1 - January 28, 2018	—	$	—	—	$	45,200,000
January 29 - February 25, 2018	793,409	$	56.31	793,409	$	150,525,000
February 26 - April 1, 2018	462,727	$	53.01	462,727	$	125,998,000
Total	1,256,136	$	55.09	1,256,136	$	125,998,000

(1) In February 2018, the Company's Board of Directors authorized the repurchase of $150,000,000 of the Company's common stock. Purchases under this program commenced in February 2018.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

None.

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ITEM 6. EXHIBITS

Exhibit Number
10.1	Letter Agreement dated February 15, 2018 between Cognex Corporation and J. Bruce Robinson*
31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14(a)/15d-14(a) under the Securities Exchange Act of 1934*
31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14(a)/15d-14(a) under the Securities Exchange Act of 1934*
32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002**
32.2	Certification of Chief Financial Officer pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002**
101	xBRL (Extensible Business Reporting Language)
	The following materials from Cognex Corporation’s Quarterly Report on Form 10-Q for the period ended April 1, 2018, formatted in xBRL: (i) Consolidated Statements of Operations for the three-month periods ended April 1, 2018 and April 2, 2017; (ii) Consolidated Statements of Comprehensive Income for the three-month periods ended April 1, 2018 and April 2, 2017; (iii) Consolidated Balance Sheets as of April 1, 2018 and December 31, 2017; (iv) Consolidated Statements of Cash Flows for the three-month periods ended April 1, 2018 and April 2, 2017; (v) Consolidated Statement of Shareholders’ Equity for the three-month period ended April 1, 2018; and (vi) Notes to Consolidated Financial Statements.
*	Filed herewith
**	Furnished herewith

29

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Date:	April 30, 2018	COGNEX CORPORATION
		By:	/s/ Robert J. Willett
			Robert J. Willett
			President and Chief Executive Officer
			(principal executive officer)
		By:	/s/ John J. Curran
			John J. Curran
			Senior Vice President of Finance
			and Chief Financial Officer
			(principal financial and accounting officer)

30

EX-10.1

EXHIBIT 10.1

February 15, 2018

delivered by email

J. Bruce Robinson

Dear Bruce:

We have received your letter of resignation from our Board of Directors dated February 15, 2018. On behalf of the Board, I would like to thank you for your past service to our company.

This letter is to confirm that, as a result of your agreement to provide consulting services as an Assistant Secretary of Cognex through the close of business on March 23, 2019, your unvested options to acquire shares of Cognex common stock (option nos. AR010322, AR010702 and AR011169) granted to you under Cognex’s Amended and Restated 2007 Stock Option and Incentive Plan (the “Plan”) will continue to vest in the amounts and at the times set forth in the applicable award agreements. After March 23, 2019, there will be no further vesting of your Cognex stock options, and the remaining unvested stock options will automatically terminate. Your rights with respect to your Cognex stock options will continue to be governed in all respects by the terms of the Plan and the applicable award agreements.

Please sign in the space indicated below and return this letter to me.

Sincerely yours,

Robert J. Shillman

Chairman of the Board of Directors

Acknowledged and Agreed:

/s/ J. Bruce Robinson

J. Bruce Robinson

Date: February 15, 2018

Cognex Corporation One Vision Drive Natick, MA 01760-2059 (508) 650-3000 fax (508) 650-3333 www.cognex.com

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Robert J. Willett, certify that:

1    I have reviewed this quarterly report on Form 10-Q of Cognex Corporation;

2    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4    The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5    The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	April 30, 2018	By:	/s/ Robert J. Willett
			Robert J. Willett
			President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, John J. Curran, certify that:

1    I have reviewed this quarterly report on Form 10-Q of Cognex Corporation;

2    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4    The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5    The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	April 30, 2018	By:	/s/ John J. Curran
			John J. Curran
			Senior Vice President of Finance
			and Chief Financial Officer

EX-32.1

Exhibit 32.1*

CERTIFICATION PURSUANT TO

18 U.S.C. 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned officer of Cognex Corporation (the “Company”) hereby certifies to his knowledge that the Company’s quarterly report on Form 10-Q for the quarterly period ended April 1, 2018 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended, and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	April 30, 2018	By:	/s/ Robert J. Willett
			Robert J. Willett
			President and Chief Executive Officer
			(principal executive officer)

* This certification shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, nor shall it be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934.

EX-32.2

Exhibit 32.2*

CERTIFICATION PURSUANT TO

18 U.S.C. 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned officer of Cognex Corporation (the “Company”) hereby certifies to his knowledge that the Company’s quarterly report on Form 10-Q for the quarterly period ended April 1, 2018 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended, and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	April 30, 2018	By:	/s/ John J. Curran
			John J. Curran
			Senior Vice President of Finance
			and Chief Financial Officer
			(principal financial officer)

* This certification shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, nor shall it be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934.

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Document And Entity Information [Abstract]
Entity Registrant Name	COGNEX CORP
Entity Central Index Key	0000851205
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Apr. 01, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding	172,948,442

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Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Income Statement [Abstract]
Revenue	$ 169,567	$ 139,039
Cost of revenue	40,198	32,532
Gross margin	129,369	106,507
Research, development, and engineering expenses	31,076	22,770
Selling, general, and administrative expenses	63,697	46,521
Operating income	34,596	37,216
Foreign currency gain (loss)	(134)	(263)
Investment income	3,240	2,012
Other income (expense)	277	270
Income before income tax expense	37,979	39,235
Income tax expense (benefit)	762	(6,236)
Net income	$ 37,217	$ 45,471
Net income per weighted-average common and common-equivalent share:
Basic (in dollars per share)	$ 0.21	$ 0.26
Diluted (in dollars per share)	$ 0.21	$ 0.25
Weighted-average common and common-equivalent shares outstanding:
Basic (in shares)	173,280	172,646
Diluted (in shares)	179,641	178,354
Cash dividends per common share	$ 0.045	$ 0.0375

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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 37,217	$ 45,471
Cash flow hedges:
Net unrealized gain (loss), net of tax of $0 and ($4) in 2018 and 2017, respectively	0	(71)
Reclassification of net realized (gain) loss into current operations	0	44
Net change related to cash flow hedges	0	(27)
Available-for-sale investments:
Net unrealized gain (loss), net of tax of ($114) and $92 in 2018 and 2017, respectively	(1,192)	511
Reclassification of net realized (gain) loss into current operations	(22)	(65)
Net change related to available-for-sale investments	(1,214)	446
Foreign currency translation adjustments:
Foreign currency translation adjustments	4,056	2,481
Other comprehensive income (loss), net of tax	2,842	2,900
Total comprehensive income	$ 40,059	$ 48,371

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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Statement of Comprehensive Income [Abstract]
Tax effect on cash flow hedges	$ 0	$ (4)
Tax effect of unrealized gain (loss) on available-for-sale investments	(114)	92
Tax effect of foreign currency translation adjustment	$ 0	$ 0

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Consolidated Balance Sheets - USD ($) $ in Thousands	Apr. 01, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 109,572	$ 106,582
Short-term investments	337,629	297,961
Accounts receivable, less reserves of $1,664 and $1,568 in 2018 and 2017, respectively	96,649	119,388
Unbilled revenue	4,232	7,454
Inventories	96,399	67,923
Prepaid expenses and other current assets	26,068	30,683
Total current assets	670,549	629,991
Long-term investments	356,181	423,441
Property, plant, and equipment, net	85,205	78,048
Goodwill	113,208	113,208
Intangible assets, net	12,420	13,189
Deferred income taxes	29,135	27,385
Other assets	2,217	2,491
Total assets	1,268,915	1,287,753
Current liabilities:
Accounts payable	29,136	23,463
Accrued expenses	56,463	68,249
Accrued income taxes	11,915	11,503
Deferred revenue and customer deposits	15,504	9,420
Total current liabilities	113,018	112,635
Deferred income taxes	319	312
Reserve for income taxes	6,958	6,488
Accrued income taxes	66,741	66,741
Other non-current liabilities	4,780	5,904
Total liabilities	191,816	192,080
Shareholders’ equity:
Common stock, $.002 par value – Authorized: 200,000 shares in 2018 and 2017, respectively, issued and outstanding: 172,948 and 173,507 shares in 2018 and 2017, respectively	346	347
Additional paid-in capital	485,654	461,338
Retained earnings	622,856	668,587
Accumulated other comprehensive loss, net of tax	(31,757)	(34,599)
Total shareholders’ equity	1,077,099	1,095,673
Total liabilities and shareholders' equity	$ 1,268,915	$ 1,287,753

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Apr. 01, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Reserves for accounts receivable	$ 1,664	$ 1,568
Common stock, par value	$ 0.002	$ 0.002
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	172,948,000	173,507,000
Common stock, shares outstanding	172,948,000	173,507,000

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Cash flows from operating activities:
Net income	$ 37,217	$ 45,471
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	13,194	7,483
Depreciation of property, plant, and equipment	4,430	3,083
Amortization of intangible assets	769	872
Amortization of discounts or premiums on investments	56	86
Realized (gain) loss on sale of investments	(22)	(65)
Revaluation of contingent consideration	(442)	(275)
Change in deferred income taxes	(1,469)	921
Change in operating assets and liabilities:
Accounts receivable	24,830	(2,238)
Unbilled revenue	3,389	953
Inventories	(27,321)	(5,386)
Prepaid expenses and other current assets	(866)	(12,461)
Accounts payable	5,309	7,167
Accrued expenses	(9,927)	(3,398)
Accrued income taxes	186	397
Deferred revenue and customer deposits	5,877	5,839
Other	(424)	(734)
Net cash provided by operating activities	54,786	47,715
Cash flows from investing activities:
Purchases of investments	(118,108)	(193,612)
Maturities and sales of investments	144,337	171,667
Purchases of property, plant, and equipment	(13,270)	(6,095)
Cash paid for acquisition of business	0	(176)
Cash paid related to discontinued business	0	(291)
Net cash provided by (used in) investing activities	12,959	(28,507)
Cash flows from financing activities:
Issuance of common stock under stock plans	11,123	29,139
Repurchase of common stock	(69,202)	(30,067)
Payment of dividends	(7,787)	(6,497)
Net cash provided by (used in) financing activities	(65,866)	(7,425)
Effect of foreign exchange rate changes on cash and cash equivalents	1,111	1,004
Net change in cash and cash equivalents	2,990	12,787
Cash and cash equivalents at beginning of period	106,582	79,641
Cash and cash equivalents at end of period	$ 109,572	$ 92,428

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Consolidated Statement of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity
Adjustment as a result of the adoption of ASU 2016-16 Income Taxes - Intra-Entity Transfers Other than Inventory (Note 12)	$ (5,961)			$ (5,961)
Beginning Balance, Shares at Dec. 31, 2017	173,507	173,507
Beginning Balance at Dec. 31, 2017	$ 1,095,673	$ 347	$ 461,338	668,587	$ (34,599)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock under stock plans, shares		697
Issuance of common stock under stock plans	11,123	$ 1	11,122
Repurchase of common stock (in shares)		(1,256)
Repurchase of common stock	(69,202)	$ (2)		(69,200)
Stock-based compensation expense	13,194		13,194
Payment of dividends	(7,787)			(7,787)
Net income	37,217			37,217
Net unrealized gain (loss) on available-for-sale investments, net of tax of ($114)	(1,192)				(1,192)
Reclassification of net realized (gain) loss on the sale of available-for-sale investments	(22)				(22)
Foreign currency translation adjustment	$ 4,056				4,056
Ending Balance, Shares at Apr. 01, 2018	172,948	172,948
Ending Balance at Apr. 01, 2018	$ 1,077,099	$ 346	$ 485,654	$ 622,856	$ (31,757)

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Consolidated Statement of Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Statement of Stockholders' Equity [Abstract]
Tax effect of unrealized gain (loss) on available-for-sale investments	$ (114)	$ 92

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Summary of Significant Accounting Policies

3 Months Ended

Apr. 01, 2018

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

As permitted by the rules of the Securities and Exchange Commission applicable to Quarterly Reports on Form 10-Q, these notes are condensed and do not contain all disclosures required by generally accepted accounting principles (GAAP). As a result of the adoption of ASC 606 "Revenue from Contracts with Customers," Cognex Corporation (the "Company") has provided new disclosures related to revenue recognition in this Quarterly Report on Form 10-Q. Reference should be made to the consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 for a full description of other significant accounting policies.

In the opinion of the management of the Company, the accompanying consolidated unaudited financial statements contain all adjustments, consisting of normal, recurring adjustments and financial statement reclassifications, necessary to present fairly the Company’s financial position as of April 1, 2018, and the results of its operations for the three-month periods ended April 1, 2018 and April 2, 2017, and changes in shareholders’ equity, comprehensive income, and cash flows for the periods presented.

The results disclosed in the Consolidated Statements of Operations for the three-month period ended April 1, 2018 are not necessarily indicative of the results to be expected for the full year.

Revenue Recognition

The Company recognizes revenue in accordance with Accounting Standards Codification (ASC) 606, “Revenue from Contracts with Customers.” The core principle of ASC 606 is to recognize revenue in a manner that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The framework in support of this core principle includes: (1) identifying the contract with the customer; (2) identifying the performance obligations in the contract; (3) determining the transaction price; (4) allocating the transaction price to the performance obligations; and (5) recognizing revenue when (or as) the performance obligations are satisfied.

Identifying the Contract with the Customer

The Company identifies contracts with customers as agreements that create enforceable rights and obligations, which typically take the form of customer contracts or purchase orders.

Identifying the Performance Obligations in the Contract

The Company identifies performance obligations as promises in contracts to transfer distinct goods or services. Standard products and services that the Company regularly sells separately are accounted for as distinct performance obligations. Application-specific customer solutions that are comprised of a combination of products and services are accounted for as one performance obligation to deliver a total solution to the customer. These solutions are provided to customers in a variety of industries, including the consumer electronics, logistics, and automotive industries.

Shipping and handling activities for which the Company is responsible under the terms and conditions of the sale are not accounted for as performance obligations but as fulfillment costs. These activities are required to fulfill the Company’s promise to transfer the good and are expensed when revenue is recognized.

The Company does not assess whether promised goods or services are performance obligations if they are immaterial in the context of the contract. If revenue is recognized before immaterial promises have been completed, then the costs related to such immaterial promises are accrued at the time of sale.

Determining the Transaction Price

The Company determines the transaction price as the amount of consideration it expects to receive in exchange for transferring promised goods or services to the customer. Amounts collected from customers for sales taxes are excluded from the transaction price.

If a contract includes a variable amount, such as a rebate, then the Company estimates the transaction price using either the expected value or the most likely amount of consideration to be received, depending upon the specific facts and circumstances. The Company includes estimated variable consideration in the transaction price only to the extent it is probable that a significant reversal of revenue will not occur when the uncertainty is resolved. The Company updates its estimate of variable consideration at the end of each reporting period to reflect changes in facts and circumstances.

Allocating the Transaction Price to the Performance Obligations

The Company allocates the transaction price to each performance obligation at contract inception based on a relative stand-alone selling price basis, or the price at which the Company would sell the good or service separately to similar customers in similar circumstances.

Recognizing Revenue When (or As) the Performance Obligations are Satisfied

The Company recognizes revenue when it transfers the promised goods or services to the customer. Revenue for standard products is recognized at the point in time when the customer obtains control of the goods, which is typically upon delivery when the customer has legal title, physical possession, the risks and rewards of ownership, and an enforceable obligation to pay for the products. Revenue for services, which are not material, are typically recognized over the time the services are provided.

Revenue for application-specific customer solutions is recognized at the point in time when the solution is validated, which is the point in time when the Company can objectively determine that the agreed-upon specifications in the contract have been met and the customer will accept the performance obligations in the arrangement. Although the customer may have taken legal title and physical possession of the goods when they arrived at the customer’s designed site, the significant risks and rewards of ownership transfer to the customer only upon validation.

In certain instances, an arrangement may include customer-specified acceptance provisions or performance guarantees that allow the customer to accept or reject delivered products that do not meet the customer’s specifications. If the Company can objectively determine that control of a good or service has been transferred to the customer in accordance with the agreed-upon specifications in the contract, then customer acceptance is a formality. If acceptance provisions are presumed to be substantive, then revenue is deferred until customer acceptance.

For the Company’s standard products and services, revenue recognition and billing typically occur at the same time. For application-specific customer solutions, however, the agreement with the customer may provide for billing terms which differ from revenue recognition criteria, resulting in either deferred revenue or unbilled revenue. Credit assessments are performed to determine payment terms, which vary by region, industry, and customer. Prepayment terms result in contract liabilities for customer deposits. When credit is granted to customers, payment is typically due 30 to 90 days from billing. The Company's contracts have an original expected duration of less than one year, and therefore as a practical expedient, the Company has elected to ignore the impact of the time value of money on a contract and to expense sales commissions. The Company recognizes an asset for costs to fulfill a contract if the costs relate directly to the contract and to future performance, and the costs are expected to be recovered.

Management exercises judgment when determining the amount of revenue to be recognized each period. Such judgments include, but are not limited to, assessing the customer’s ability and intention to pay substantially all of the contract consideration when due, determining when two or more contracts should be combined and accounted for as a single contract, determining whether a contract modification has occurred, assessing whether promises are immaterial in the context of the contract, determining whether material promises in a contract represent distinct performance obligations, estimating the transaction price for a contract that contains variable consideration, determining the stand-alone selling price of each performance obligation, determining whether control is transferred over time or at a point in time for performance obligations, and assessing whether formal customer acceptance provisions are substantive.

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New Pronouncements

3 Months Ended

Apr. 01, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

New Pronouncements

New Pronouncements

Accounting Standards Update (ASU) 2016-02, "Leases"

ASU 2016-02 creates Topic 842, Leases. The objective of this Update is to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet, and disclosing key information about leasing arrangements. This ASU applies to any entity that enters into a lease, although lessees will see the most significant changes. The main difference between current U.S. GAAP and Topic 842 is the recognition of lease assets and lease liabilities on the balance sheet for those leases classified as operating leases under current U.S. GAAP. Topic 842 distinguishes between finance leases and operating leases, which are substantially similar to the classification criteria for distinguishing between capital leases and operating leases under current U.S. GAAP. For public companies, the guidance in ASU 2016-02 is effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods. This ASU should be applied using a modified retrospective approach. Management is in the process of implementing this Update. As of the date of this report, management has determined the scope of leases subject to the new accounting requirements and has selected a software package to assist with compliance. Management is in the process of drafting the internal accounting lease policy and designing the related processes and internal controls.

Accounting Standards Update (ASU) 2016-13, "Financial Instruments - Measurement of Credit Losses"

ASU 2016-13 applies to all reporting entities holding financial assets that are not accounted for at fair value through net income (debt securities).  The amendments in this Update eliminate the probable initial recognition threshold to recognize a credit loss under current U.S. GAAP and, instead, reflect an entity’s current estimate of all expected credit losses. In addition, this Update broadens the information an entity must consider in developing the credit loss estimate, including the use of reasonable and supportable forecasted information.  The amendments in this Update require that credit losses on available-for-sale debt securities be presented as an allowance rather than as a write-down and an entity will be able to record reversals of credit losses in current period net income. For public companies, the guidance in ASU 2016-13 is effective for annual periods beginning after December 15, 2019, and interim periods within those annual periods.  This ASU should be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective.  Management does not expect ASU 2016-13 to have a material impact on the Company's financial statements and disclosures.

Accounting Standards Update (ASU) 2017-08, "Receivables - Nonrefundable Fees and Other Costs - Premium Amortization on Purchased Callable Debt Securities "

ASU 2017-08 applies to all reporting entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date (that is, at a premium). The amendments in this Update shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. Under current GAAP, premiums and discounts on callable debt securities generally are amortized to the maturity date. If that callable debt security is subsequently called, the entity records a loss equal to the unamortized premium. The amendments in this Update more closely align the amortization period of premiums and discounts to expectations incorporated in market pricing on the underlying securities. For public companies, the amendments in ASU 2017-08 are effective for annual periods beginning after December 15, 2019 and interim reporting periods within annual years beginning after December 15, 2020. This ASU should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption, and, in the period of adoption, the entity is required to provide disclosures about the change in accounting principle. Early adoption is permitted, including adoption in an interim period. Management does not expect ASU 2017-08 to have a material impact on the Company's financial statements and disclosures.

Accounting Standards Update (ASU) 2017-12, "Derivatives and Hedging - Targeted Improvements to Accounting for Hedging Activities"

ASU 2017-12 applies to all reporting entities that elect to apply hedge accounting. The hedge accounting requirements under current GAAP sometimes do not permit an entity to properly recognize the economic results of the hedging strategy in the financial statements, and they are difficult to understand and interpret. The amendments in this Update make certain targeted improvements to simplify the application of the hedge accounting guidance. Also, they better align the risk management activities and financial reporting for hedging relationships through changes to both 1) the designation and measurement guidance for qualifying hedging relationships and 2) the presentation of hedge results. For public companies, the amendments in ASU 2017-12 are effective for annual reporting periods beginning after December 15, 2018, and interim reporting periods within those annual periods. Early adoption is permitted including adoption in any interim period after issuance of the Update. All transition requirements and elections should be applied to hedging relationships existing on the date of adoption. The entity should apply a cumulative-effect adjustment related to eliminating the separate measurement of ineffectiveness to accumulated other comprehensive income with a corresponding adjustment to the opening balance of retained earnings as of the beginning of the fiscal year that an entity adopts the amendments in this Update. The amended presentation and disclosure guidance is required only prospectively. Management does not expect ASU 2017-12 to have a material impact on the Company's financial statements and disclosures.

Accounting Standards Update (ASU) 2018-1, "Land Easement Practical Expedient for Transition to Topic 842"

ASU 2018-01 applies to entities with land easements that exist or expired before an entity’s adoption of Topic 842, provided that the entity does not account for those land easements as leases under Topic 840. The amendments in this Update permit an entity to elect an optional transition practical expedient to not evaluate under Topic 842 land easements that exist or expired before the entity’s adoption of Topic 842 and that were not previously accounted for as leases under Topic 840. An entity that elects this practical expedient should apply the practical expedient consistently to all of its existing or expired land easements that were not previously accounted for as leases under Topic 840. Once an entity adopts Topic 842, it should apply that Topic prospectively to all new (or modified) land easements to determine whether the arrangement should be accounted for as a lease. An entity that does not elect this practical expedient should evaluate all existing or expired land easements in connection with the adoption of the new lease requirements in Topic 842 to assess whether they meet the definition of a lease. The amendments in this Update affect the amendments in Update 2016-02, which are not yet effective but may be early adopted. The effective date and transition requirements for the amendments are the same as the effective date and transition requirements in Update 2016-02, which is for annual periods beginning after December 15, 2018, and interim periods within those annual periods. Management is in the process of evaluating the impact of this Update.

Accounting Standards Update (ASU) 2018-2, "Income Statement - Reporting Comprehensive Income"

ASU 2018-02 applies to entities required to apply the provisions of Topic 220, Income Statement - Reporting Comprehensive Income, and has items of other comprehensive income for which the related tax effects are presented in other comprehensive income as required by GAAP. The amendments in this Update allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 (the "Tax Act"). Consequently, the amendments eliminate the stranded tax effects resulting from the Tax Act and will improve the usefulness of information reported to financial statement users. However, because the amendments only relate to the reclassification of the income tax effects of the Tax Act, the underlying guidance that requires the effect of a change in tax laws or rates to be included in income from continuing operations is not affected. The amendments in this Update also require certain disclosures about stranded tax effects. The amendments in this Update are effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption of the amendments in this Update is permitted, including adoption in any interim period. The amendments in this Update should be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Act is recognized. Management does not expect ASU 2018-2 to have a material impact on the Company's financial statements and disclosures.

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Fair Value Measurements

3 Months Ended

Apr. 01, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Financial Assets and Liabilities that are Measured at Fair Value on a Recurring Basis

The following table summarizes the financial assets and liabilities required to be measured at fair value on a recurring basis as of April 1, 2018 (in thousands):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)	Unobservable Inputs (Level 3)
Assets:
Money market instruments	$	7,958	—	$	—
Corporate bonds	—		380,621	—
Treasury bills	—		142,299	—
Asset-backed securities	—		131,678	—
Sovereign bonds	—		22,780	—
Municipal bonds	—		10,501	—
Agency bonds	—		5,931	—
Cash flow hedge forward contracts	—		—	—
Economic hedge forward contracts	—		4	—
Liabilities:
Cash flow hedge forward contracts	—		—	—
Economic hedge forward contracts	—		18	—
Contingent consideration liabilities	—		—	3,115

The Company’s money market instruments are reported at fair value based upon the daily market price for identical assets in active markets, and are therefore classified as Level 1.

The Company’s debt securities and forward contracts are reported at fair value based upon model-driven valuations in which all significant inputs are observable or can be derived from or corroborated by observable market data for substantially the full term of the asset or liability, and are therefore classified as Level 2. Management is responsible for estimating the fair value of these financial assets and liabilities, and in doing so, considers valuations provided by a large, third-party pricing service. For debt securities, this service maintains regular contact with market makers, brokers, dealers, and analysts to gather information on market movement, direction, trends, and other specific data. They use this information to structure yield curves for various types of debt securities and arrive at the daily valuations. The Company's forward contracts are typically traded or executed in over-the-counter markets with a high degree of pricing transparency. The market participants are generally large commercial banks.

The Company did not record an other-than-temporary impairment of these financial assets during the three-month period ended April 1, 2018.

The Company's contingent consideration liabilities are reported at fair value based upon probability-adjusted present values of the consideration expected to be paid, using significant inputs that are not observable in the market, and are therefore classified as Level 3. Key assumptions used in these estimates include probability assessments with respect to the likelihood of achieving certain revenue milestones. The fair values of these contingent consideration liabilities were calculated using discount rates consistent with the level of risk of achievement, and are remeasured each reporting period with changes in fair value recorded in "Other income (expense)" on the Consolidated Statements of Operations.

The following table summarizes the activity for the Company's liabilities measured at fair value using Level 3 inputs for the three-month period ended April 1, 2018 (in thousands):

Balance as of December 31, 2017	$	3,557
Fair value adjustment to Manatee contingent consideration	(675		)
Fair value adjustment to Chiaro contingent consideration	52
Fair value adjustment to GVi contingent consideration	181
Balance as of April 1, 2018	$	3,115

Non-financial Assets that are Measured at Fair Value on a Non-recurring Basis

Non-financial assets such as property, plant and equipment, goodwill, and intangible assets are required to be measured at fair value only when an impairment loss is recognized. The Company did not record an impairment charge related to these assets during the three-month period ended April 1, 2018.

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Cash, Cash Equivalents, and Investments

3 Months Ended

Apr. 01, 2018

Cash and Cash Equivalents [Abstract]

Cash, Cash Equivalents, and Investments

Cash, Cash Equivalents, and Investments

Cash, cash equivalents, and investments consisted of the following (in thousands):

	April 1, 2018		December 31, 2017
Cash	$	101,614	$	97,951
Money market instruments	7,958		8,631
Cash and cash equivalents	109,572		106,582
Treasury bills	138,695		150,371
Corporate bonds	108,313		47,395
Asset-backed securities	75,432		59,203
Municipal bonds	9,153		8,805
Sovereign bonds	6,036		21,579
Agency bonds	—		10,608
Short-term investments	337,629		297,961
Corporate bonds	272,308		296,014
Asset-backed securities	56,246		71,727
Sovereign bonds	16,744		13,147
Agency bonds	5,931		14,890
Treasury bills	3,604		23,459
Municipal bonds	1,348		4,204
Long-term investments	356,181		423,441
	$	803,382	$	827,984

Treasury bills consist of debt securities issued by the U.S. government; corporate bonds consist of debt securities issued by both domestic and foreign companies; asset-backed securities consist of debt securities collateralized by pools of receivables or loans with credit enhancement; municipal bonds consist of debt securities issued by state and local government entities; sovereign bonds consist of direct debt issued by foreign governments; and agency bonds consist of domestic or foreign obligations of government agencies and government sponsored enterprises that have government backing. All securities are denominated in U.S. Dollars.

The following table summarizes the Company’s available-for-sale investments as of April 1, 2018 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Treasury bills	$	139,159	$	—	$	(464	)	$	138,695
Corporate bonds	108,533		50		(270		)	108,313
Asset-backed securities	75,710		5		(283		)	75,432
Municipal bonds	9,165		—		(12		)	9,153
Sovereign bonds	6,040		1		(5		)	6,036
Long-term:
Corporate bonds	272,345		797		(834		)	272,308
Asset-backed securities	56,573		14		(341		)	56,246
Sovereign bonds	16,779		38		(73		)	16,744
Agency bonds	5,930		1		—			5,931
Treasury bills	3,601		3		—			3,604
Municipal bonds	1,360		—		(12		)	1,348
	$	695,195	$	909	$	(2,294	)	$	693,810

The following table summarizes the Company’s gross unrealized losses and fair values for available-for-sale investments in an unrealized loss position as of April 1, 2018 (in thousands):

	Unrealized Loss Position For:
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	172,162	$	(812	)	$	23,693	$	(292	)	$	195,855	$	(1,104	)
Treasury bills	96,209		(277		)	42,487		(187		)	138,696		(464		)
Asset-backed securities	112,632		(614		)	2,640		(10		)	115,272		(624		)
Sovereign bonds	3,599		(9		)	8,730		(69		)	12,329		(78		)
Municipal bonds	4,196		(24		)	—		—			4,196		(24		)
Agency bonds	—		—			—		—			—		—
	$	388,798	$	(1,736	)	$	77,550	$	(558	)	$	466,348	$	(2,294	)

As of April 1, 2018, the Company did not recognize any other-than-temporary impairment of these investments. In its evaluation, management considered the type of security, the credit rating of the security, the length of time the security has been in a loss position, the size of the loss position, the Company's intent and ability to hold the security to expected recovery of value, and other meaningful information. The Company does not intend to sell, and is unlikely to be required to sell, any of these available-for-sale investments before their effective maturity or market price recovery.

The Company recorded gross realized gains and gross realized losses on the sale of debt securities totaling $55,000 and $33,000, respectively, during the three-month period ended April 1, 2018 and $88,000 and $23,000, respectively, during the three-month period ended April 2, 2017. These gains and losses are included in "Investment income" on the Consolidated Statement of Operations. Prior to the sale of these securities, unrealized gains and losses for these debt securities, net of tax, are recorded in shareholders’ equity as other comprehensive income (loss).

The following table presents the effective maturity dates of the Company’s available-for-sale investments as of April 1, 2018 (in thousands):

	<1 year		1-2 Years		2-3 Years		3-4 Years		4-5 Years		5-7 Years		Total
Corporate bonds	$	108,313	$	116,223	$	97,412	$	36,342	$	18,961	$	3,370	$	380,621
Treasury bills	138,695		3,604		—		—		—		—		142,299
Asset-backed securities	75,432		35,411		6,923		6,504		2,336		5,072		131,678
Sovereign bonds	6,036		10,995		5,749		—		—		—		22,780
Municipal bonds	9,153		—		1,348		—		—		—		10,501
Agency bonds	—		—		—		—		5,931		—		5,931
	$	337,629	$	166,233	$	111,432	$	42,846	$	27,228	$	8,442	$	693,810

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Inventories

3 Months Ended

Apr. 01, 2018

Inventory Disclosure [Abstract]

Inventories

Inventories

Inventories consisted of the following (in thousands):

	April 1, 2018		December 31, 2017
Raw materials	$	42,759	$	33,927
Work-in-process	2,192		2,114
Finished goods	51,448		31,882
	$	96,399	$	67,923

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Intangible Assets

3 Months Ended

Apr. 01, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

Amortized intangible assets consisted of the following (in thousands):

	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Distribution networks	$	38,060	$	38,060	$	—
Completed technologies	13,687		4,791		8,896
Customer relationships	8,607		5,330		3,277
Non-compete agreements	370		123		247
Balance as of April 1, 2018	$	60,724	$	48,304	$	12,420
	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Distribution networks	$	38,060	$	38,060	$	—
Completed technologies	13,687		4,181		9,506
Customer relationships	8,607		5,202		3,405
Non-compete agreements	370		92		278
Balance as of December 31, 2017	$	60,724	$	47,535	$	13,189

As of April 1, 2018, estimated future amortization expense related to intangible assets is as follows (in thousands):

Year Ended December 31,	Amount
Remainder of fiscal 2018	$	2,307
2019	2,701
2020	2,185
2021	2,017
2022	1,691
2023	989
Thereafter	530
	$	12,420

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Warranty Obligations

3 Months Ended

Apr. 01, 2018

Product Warranties Disclosures [Abstract]

Warranty Obligations

Warranty Obligations

The Company records the estimated cost of fulfilling product warranties at the time of sale based upon historical costs to fulfill claims. Obligations may also be recorded subsequent to the time of sale whenever specific events or circumstances impacting product quality become known that would not have been taken into account using historical data. While we engage in extensive product quality programs and processes, including actively monitoring and evaluating the quality of our component suppliers and third-party contract manufacturers, the Company’s warranty obligation is affected by product failure rates, material usage, and service delivery costs incurred in correcting a product failure. An adverse change in any of these factors may result in the need for additional warranty provisions. Warranty obligations are included in “Accrued expenses” on the Consolidated Balance Sheets.

The changes in the warranty obligation were as follows (in thousands):

Balance as of December 31, 2017	$	4,701
Provisions for warranties issued during the period	697
Fulfillment of warranty obligations	(802		)
Foreign exchange rate changes	116
Balance as of April 1, 2018	$	4,712

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Derivative Instruments

3 Months Ended

Apr. 01, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

Derivative Instruments

The Company’s foreign currency risk management strategy is principally designed to mitigate the potential financial impact of changes in the value of transactions and balances denominated in foreign currencies resulting from changes in foreign currency exchange rates. Currently, the Company enters into two types of hedges to manage this risk. The first are economic hedges which utilize foreign currency forward contracts with maturities of up to 45 days to manage the exposure to fluctuations in foreign currency exchange rates arising primarily from foreign-denominated receivables and payables. The gains and losses on these derivatives are intended to be offset by the changes in the fair value of the assets and liabilities being hedged. These economic hedges are not designated as hedging instruments for hedge accounting treatment. The second are cash flow hedges which utilize foreign currency forward contracts with maturities of up to 18 months to hedge specific forecasted transactions of the Company's foreign subsidiaries with the goal of protecting the Company's budgeted revenues and expenses against foreign currency exchange rate changes compared to its budgeted rates. These cash flow hedges are designated as hedging instruments for hedge accounting treatment.

The Company had the following outstanding forward contracts (in thousands):

	April 1, 2018			December 31, 2017
Currency	Notional Value	USD Equivalent		Notional Value	USD Equivalent
Derivatives Not Designated as Hedging Instruments:
Japanese Yen	565,000	$	5,299	455,000	$	4,049
Swiss Franc	1,600	2,072		1,365	1,401
British Pound	1,300	1,824		1,650	2,232
Hungarian Forint	400,000	1,576		545,000	2,110
Taiwanese Dollar	43,000	1,480		37,725	1,278
Korean Won	655,000	616		1,825,000	1,708

Information regarding the fair value of the outstanding forward contracts was as follows (in thousands):

	Asset Derivatives					Liability Derivatives
	Balance	Fair Value				Balance	Fair Value
	Sheet Location	April 1, 2018		December 31, 2017		Sheet Location	April 1, 2018		December 31, 2017
Derivatives Designated as Hedging Instruments:
Cash flow hedge forward contracts	Prepaid expenses and other current assets	$	—	$	—	Accrued expenses	$	—	$	—
Economic hedge forward contracts	Prepaid expenses and other current assets	$	4	$	16	Accrued expenses	$	18	$	13

The following table presents the gross activity for all derivative assets and liabilities which were presented on a net basis on the Consolidated Balance Sheets due to the right of offset with each counterparty (in thousands):

Asset Derivatives					Liability Derivatives
	April 1, 2018		December 31, 2017			April 1, 2018		December 31, 2017
Gross amounts of recognized assets	$	4	$	16	Gross amounts of recognized liabilities	$	18	$	13
Gross amounts offset	—		—		Gross amounts offset	—		—
Net amount of assets presented	$	4	$	16	Net amount of liabilities presented	$	18	$	13

Information regarding the effect of derivative instruments on the consolidated financial statements was as follows (in thousands):

	Location in Financial Statements	Three-months Ended
		April 1, 2018			April 2, 2017
Derivatives Designated as Hedging Instruments:
Gains (losses) recorded in shareholders' equity (effective portion)	Accumulated other comprehensive income (loss), net of tax	$	—		$	10
Gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations (effective portion)	Revenue	$	—		$	(55	)
	Research, development, and engineering expenses	—			3
	Selling, general, and administrative expenses	—			8
	Total gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations	$	—		$	(44	)
Gains (losses) recognized in current operations (ineffective portion and discontinued derivatives)	Foreign currency gain (loss)	$	—		$	—
Derivatives Not Designated as Hedging Instruments:
Gains (losses) recognized in current operations	Foreign currency gain (loss)	$	(310	)	$	(81	)

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Revenue Recognition

3 Months Ended

Apr. 01, 2018

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Revenue Recognition

On January 1, 2018, the Company adopted Accounting Standards Codification (ASC) 606, "Revenue from Contracts with Customers," using the full retrospective method to present all periods reported on a consistent basis. Accordingly, prior-period results have been restated to apply the provisions of this ASC.

As a result of this adoption, revenue for software-only products sold as part of multiple-deliverable arrangements are no longer deferred when vendor-specific objective evidence of fair value does not exist for the undelivered elements of the arrangement. This change results in earlier recognition of revenue. In addition, certain of the Company’s product accessory sales, which were reported on a net basis, are now reported on a gross basis as a result of applying the expanded guidance in the new standard related to principal versus agent considerations. This change results in the Company reporting higher revenue and higher cost of revenue when these sales are reported on a gross basis, although the gross margin dollars do not change. Furthermore, for arrangements that include customer-specified acceptance criteria, revenue is recognized when the Company can objectively determine that control has been transferred to the customer in accordance with the agreed-upon specifications in the contract, which may occur before formal customer acceptance. This change primarily impacts revenue recognition for arrangements in the logistics industry where certain customer solutions include installed ID products and results in earlier recognition of revenue.

The adoption of the standard impacted our previously-reported results as follows (in thousands):

Statement of Operations
	Three-months ended
	April 2, 2017
	As previously reported			Adjustment			As restated
Revenue	$	134,942		$	4,097		$	139,039
Cost of revenue	28,225			4,307			32,532
Gross margin	106,717			(210		)	106,507
Operating income	37,426			(210		)	37,216
Income before income tax expense	39,445			(210		)	39,235
Income tax expense (benefit)	(6,210		)	(26		)	(6,236		)
Net income	$	45,655		$	(184	)	$	45,471
Net income per weighted-average common and common-equivalend share:
Basic	$	0.26		$	—		$	0.26
Diluted	$	0.26		$	(0.01	)	$	0.25

Balance Sheet
	December 31, 2017
	As previously reported		Adjustment			As restated
Prepaid expenses and other current assets	$	30,800	$	(117	)	$	30,683
Accrued income taxes	11,391		112			11,503
Deferred revenue and customer deposits	9,969		(549		)	9,420
Retained earnings	668,267		320			668,587

The following table summarizes disaggregated revenue information by geographic area based upon the customer's country of domicile (in thousands):

	Three-months ended
	April 1, 2018		April 2, 2017
Americas	$	59,217	$	42,540
Europe	56,203		43,107
Greater China	27,159		22,706
Other Asia	26,988		30,686
	$	169,567	$	139,039

The following table summarizes disaggregated revenue information by revenue type (in thousands):

	Three-months ended
	April 1, 2018		April 2, 2017
Standard products and services	$	158,399	$	133,017
Application-specific customer solutions	11,168		6,022
	$	169,567	$	139,039

Costs to Fulfill a Contract

Costs to fulfill a contract are included in "Prepaid expenses and other current assets" on the Consolidated Balance Sheet and amounted to $4,615,000 and $3,230,000 as of April 1, 2018 and December 31, 2017, respectively.

Accounts Receivable, Contract Assets, and Contract Liabilities

Accounts receivable represent amounts billed and currently due from customers which are reported at their net estimated realizable value. The Company maintains reserves against its accounts receivable for potential credit losses. Credit losses recognized on accounts receivable were immaterial for the three-month periods ended April 1, 2018 and April 2, 2017, respectively. Contract assets consist of unbilled revenue which arises when revenue is recognized in advance of billing for certain application-specific customer solutions contracts. Contract liabilities consist of deferred revenue and customer deposits which arise when amounts are billed to or collected from customers in advance of revenue recognition.

The following table summarizes the deferred revenue and customer deposits activity for the three-month period ended April 1, 2018 (in thousands):

	Amount
Balance as of December 31, 2017	$	9,420
Increases to deferred revenue and customer deposits	11,751
Recognition of revenue	(5,875		)
Foreign exchange rate changes	208
Balance as of April 1, 2018	$	15,504

As a practical expedient, the Company has elected not to disclose the aggregate amount of the transaction price allocated to unsatisfied performance obligations, as our contracts have an original expected duration of less than one year.

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Stock-Based Compensation Expense

3 Months Ended

Apr. 01, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation Expense

Stock-Based Compensation Expense

The Company’s share-based payments that result in compensation expense consist of stock option grants and restricted stock awards. As of April 1, 2018, the Company had 10,160,452 shares available for grant. Stock options are granted with an exercise price equal to the market value of the Company’s common stock at the grant date and generally vest over four or five years based upon continuous service and expire ten years from the grant date. Restricted stock awards are granted with an exercise price equal to the market value of the Company's common stock at the time of grant. Conditions of the award may be based on continuing employment and/or achievement of pre-established performance goals and objectives. Vesting for performance-based restricted stock awards and time-based restricted stock awards must not be less than one year and three years, respectively; however, awards with time-based vesting may become vested incrementally over such three-year period.

The following table summarizes the Company’s stock option activity for the three-month period ended April 1, 2018:

	Shares (in thousands)		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2017	12,726		$	25.24
Granted	2,043		56.44
Exercised	(697	)	15.96
Forfeited or expired	(68	)	25.84
Outstanding as of April 1, 2018	14,004		$	30.25	7.9	$	317,169
Exercisable as of April 1, 2018	4,879		$	19.88	6.5	$	156,676
Options vested or expected to vest as of April 1, 2018 (1)	12,377		$	28.99	7.8	$	294,379

(1) In addition to the vested options, the Company expects a portion of the unvested options to vest at some point in the future. Options expected to vest are calculated by applying an estimated forfeiture rate to the unvested options.

The fair values of stock options granted in each period presented were estimated using the following weighted-average assumptions:

	Three-months Ended
	April 1, 2018		April 2, 2017
Risk-free rate	2.9	%	2.4	%
Expected dividend yield	0.32	%	0.39	%
Expected volatility	39	%	41	%
Expected term (in years)	5.3		5.3

Risk-free rate

The risk-free rate was based upon a treasury instrument whose term was consistent with the contractual term of the option.

Expected dividend yield

Generally, the current dividend yield is calculated by annualizing the cash dividend declared by the Company’s Board of Directors and dividing that result by the closing stock price on the grant date. 

Expected volatility

The expected volatility was based upon a combination of historical volatility of the Company’s common stock over the contractual term of the option and implied volatility for traded options of the Company’s stock.

Expected term

The expected term was derived from the binomial lattice model from the impact of events that trigger exercises over time.

The Company stratifies its employee population into two groups: one consisting of senior management and another consisting of all other employees. The Company currently applies an estimated annual forfeiture rate of 8% to all unvested options for senior management and a rate of 12% for all other employees. The Company revised its estimated forfeiture rates in the three-month period ended April 1, 2018, resulting in an increase to compensation expense of $1,283,000. The Company also revised its estimated forfeiture rates in the three-month period ended April 2, 2017, resulting in an decrease to compensation expense of $673,000.

The weighted-average grant-date fair values of stock options granted during the three-month periods ended April 1, 2018 and April 2, 2017 were $21.62 and $14.95, respectively.

The total intrinsic values of stock options exercised for the three-month periods ended April 1, 2018 and April 2, 2017 were $28,088,000 and $53,043,000, respectively. The total fair values of stock options vested for the three-month periods ended April 1, 2018 and April 2, 2017 were $25,674,000 and $17,987,000, respectively.

As of April 1, 2018, total unrecognized compensation expense related to non-vested stock options was $63,749,000, which is expected to be recognized over a weighted-average period of 2.02 years.

The following table summarizes the Company's restricted stock activity for the three-month period ended April 1, 2018:

	Shares (in thousands)	Weighted-Average Grant Fair Value		Aggregate Intrinsic Value (in thousands)(1)
Nonvested as of December 31, 2017	20	$	17.03
Granted	—	—
Vested	—	—
Forfeited or expired	—	—
Nonvested as of April 1, 2018	20	$	17.03	$	1,040

(1) Fair market value as of April 1, 2018.

The fair values of restricted stock awards granted were determined based upon the market value of the Company's common stock at the time of grant. The initial cost is then amortized over the period of vesting until the restrictions lapse. These restricted shares will be fully vested in 2018. Participants are entitled to dividends on restricted stock awards, but only receive those amounts if the shares vest. The sale or transfer of these shares is restricted during the vesting period.

The total stock-based compensation expense and the related income tax benefit recognized for the three-month period ended April 1, 2018 were $13,194,000 and $2,347,000, respectively, and for the three-month period ended April 2, 2017 were $7,483,000 and $2,439,000, respectively. No compensation expense was capitalized as of April 1, 2018 or December 31, 2017.

The following table presents the stock-based compensation expense by caption for each period presented on the Consolidated Statements of Operations (in thousands):

	Three-months Ended
	April 1, 2018		April 2, 2017
Cost of revenue	$	797	$	430
Research, development, and engineering	4,815		2,610
Selling, general, and administrative	7,582		4,443
	$	13,194	$	7,483

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Stock Repurchase Program

3 Months Ended

Apr. 01, 2018

Equity [Abstract]

Stock Repurchase Program

Stock Repurchase Program

In April 2017, the Company's Board of Directors authorized the repurchase of $100,000,000 of the Company's common stock. As of April 1, 2018, the Company repurchased 1,744,000 shares at a cost of $100,000,000 under this program, including 803,000 shares at a cost of $45,200,000 in the three-month period ended April 1, 2018. Stock repurchases under this April 2017 program are now complete. In February 2018, the Company's Board of Directors authorized the repurchase of an additional $150,000,000 of the Company's common stock. As of April 1, 2018, the Company repurchased 453,000 shares at a cost of $24,002,000 under this program, leaving a remaining authorized balance of $125,998,000. Total stock repurchases for the three-month period ended April 1, 2018 amounted to $69,202,000. The Company may repurchase shares under this program in future periods depending upon a variety of factors, including, among other things, the impact of dilution from employee stock options, stock price, share availability, and cash requirements.

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Taxes

3 Months Ended

Apr. 01, 2018

Income Tax Disclosure [Abstract]

Taxes

Taxes

A reconciliation of the United States federal statutory corporate tax rate to the Company’s income tax expense, or effective tax rate, was as follows:

	Three-months Ended
	April 1, 2018		April 2, 2017
Income tax provision at federal statutory corporate tax rate	21	%	35	%
State income taxes, net of federal benefit	1	%	1	%
Foreign tax rate differential	(7	)%	(18	)%
Tax credit	(1	)%	(1	)%
Discrete tax benefit related to stock option exercises	(13	)%	(33	)%
Other discrete tax events	—	%	(1	)%
Other	1	%	1	%
Income tax provision	2	%	(16	)%

On December 22, 2017, the United States Congress passed and the President signed into law the Tax Act. The Tax Act included a decrease in the U.S. federal statutory corporate tax rate from 35% to 21%, a one-time transition tax on unrepatriated foreign earnings, and limits on certain deductions. The Company made what it considers to be a reasonable estimate of the impact of the Tax Act in its financial statements for the year ended December 31, 2017. The Company has not recorded any changes to this estimate for the three-month period ended April 1, 2018.

The Securities and Exchange Commission (SEC) released Staff Accounting Bulletin (SAB) No. 118 to provide guidance to companies on how to implement the accounting and disclosure changes as a result of the Tax Act. The SEC staff guidance has recognized that, due to the complexity and timing of the release of the Tax Act, the accounting for this change in the law may be incomplete upon issuance of a company's financial statements. This significant estimate is highly judgmental and changes to this estimate could result in material charges or credits in future reporting periods. U.S. Treasury regulations and administrative guidance have not been finalized as of the date of these financial statements. The issuance of final regulations may require the Company to revise its estimates of earnings and profits, as well as certain deferred taxes as required. The Tax Act subjects the Company to current tax on Global Intangible Low-Taxed Income (GILTI) earned by certain foreign subsidiaries.  The Company can make an accounting policy election to either recognize deferred taxes for temporary differences expected to reverse as GILTI in future years or provide for the tax expense related to GILTI resulting from those items in the year the tax is incurred. As of the date of this report, the Company is still evaluating the guidance and has not made a policy election related to the treatment of the GILTI tax. The Company will continue to gather and analyze information on historical unrepatriated foreign earnings and to monitor state laws relating to this income to finalize both the federal and state tax impact.

The majority of income earned outside of the United States is indefinitely reinvested to provide funds for international expansion. The Company is tax resident in numerous jurisdictions around the world and has identified its major jurisdictions as the United States, Ireland, and China. The statutory tax rate is 12.5% in Ireland and 25% in China, compared to the U.S. federal statutory corporate tax rate of 21%. International rights to certain of the Company's intellectual property are held by a subsidiary whose legal jurisdiction does not tax this income, resulting in a foreign effective tax rate that is lower than the above mentioned statutory rates, although the reduced taxes overseas have been partially offset by changes in U.S. tax law. These differences resulted in a decrease in the effective tax rate by 7 and 18 percentage points for the three-month periods ended April 1, 2018 and April 2, 2017, respectively.

The excess tax benefit arising from the difference between the deduction for tax purposes and the compensation cost recognized for financial reporting purposes from stock option exercises resulted in a decrease of the effective tax rate by 13 and 33 percentage points for the three-month periods ended April 1, 2018 and April 2, 2017, respectively.

On January 1, 2018, the Company adopted Accounting Standard Update (ASU) 2016-16, "Income Taxes - Intra-Entity Transfers of Assets Other than Inventory." This Update requires the recognition of deferred income taxes for an intra-entity transfer of an asset other than inventory. As a result of this ASU, the Company recorded $5,961,000 through a cumulative-effect adjustment directly to retained earnings at the beginning of fiscal year 2018.

During the three-month period ended April 1, 2018, the Company recorded a $484,000 increase in reserves for income taxes, net of deferred tax benefit. Estimated interest and penalties included in these amounts totaled $70,000 for the three-month period ended April 1, 2018.

The Company’s reserve for income taxes, including gross interest and penalties, was $7,986,000 as of April 1, 2018, which included $6,958,000 classified as a non-current liability and $1,028,000 recorded as a reduction to non-current deferred tax assets. The amount of gross interest and penalties included in these balances was $847,000. If the Company’s tax positions were sustained or the statutes of limitations related to certain positions expired, these reserves would be released and income tax expense would be reduced in a future period. As a result of the expiration of certain statutes of limitations, there is a potential that a portion of these reserves could be released, which would decrease income tax expense by approximately $1,100,000 to $1,200,000 over the next twelve months.

The Company has defined its major tax jurisdictions as the United States, Ireland and China, and within the United States, Massachusetts. Within the United States, the tax years 2014 through 2017 remain open to examination by the Internal Revenue Service and various state tax authorities. The tax years 2013 through 2017 remain open to examination by various taxing authorities in other jurisdictions in which the Company operates.

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Weighted-Average Shares

3 Months Ended

Apr. 01, 2018

Earnings Per Share [Abstract]

Weighted-Average Shares

Weighted-Average Shares

Weighted-average shares were calculated as follows (in thousands):

	Three-months Ended
	April 1, 2018	April 2, 2017
Basic weighted-average common shares outstanding	173,280	172,646
Effect of dilutive stock options	6,361	5,708
Weighted-average common and common-equivalent shares outstanding	179,641	178,354

Stock options to purchase 1,339,000 and 1,648,000 shares of common stock, on a weighted-average basis, were outstanding during the three-month periods ended April 1, 2018 and April 2, 2017, respectively, but were not included in the calculation of dilutive net income per share because they were anti-dilutive.

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Subsequent Events

3 Months Ended

Apr. 01, 2018

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

On April 25, 2018, the Company's shareholders approved an amendment to the Company's Articles of Organization to increase the authorized number of shares of common stock from 200,000,000 to 300,000,000. In addition, on April 25, 2018, the Company's shareholders approved an amendment and restatement of the Company's 2001 General Stock Option Plan which provides for an increase in the number of available shares by 10,000,000.

On April 30, 2018, the Company’s Board of Directors declared a cash dividend of $0.045 per share. The dividend is payable June 1, 2018 to all shareholders of record as of the close of business on May 18, 2018.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Apr. 01, 2018

Accounting Policies [Abstract]

Revenue Recognition

The Company recognizes revenue in accordance with Accounting Standards Codification (ASC) 606, “Revenue from Contracts with Customers.” The core principle of ASC 606 is to recognize revenue in a manner that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The framework in support of this core principle includes: (1) identifying the contract with the customer; (2) identifying the performance obligations in the contract; (3) determining the transaction price; (4) allocating the transaction price to the performance obligations; and (5) recognizing revenue when (or as) the performance obligations are satisfied.

Identifying the Contract with the Customer

The Company identifies contracts with customers as agreements that create enforceable rights and obligations, which typically take the form of customer contracts or purchase orders.

Identifying the Performance Obligations in the Contract

The Company identifies performance obligations as promises in contracts to transfer distinct goods or services. Standard products and services that the Company regularly sells separately are accounted for as distinct performance obligations. Application-specific customer solutions that are comprised of a combination of products and services are accounted for as one performance obligation to deliver a total solution to the customer. These solutions are provided to customers in a variety of industries, including the consumer electronics, logistics, and automotive industries.

Shipping and handling activities for which the Company is responsible under the terms and conditions of the sale are not accounted for as performance obligations but as fulfillment costs. These activities are required to fulfill the Company’s promise to transfer the good and are expensed when revenue is recognized.

The Company does not assess whether promised goods or services are performance obligations if they are immaterial in the context of the contract. If revenue is recognized before immaterial promises have been completed, then the costs related to such immaterial promises are accrued at the time of sale.

Determining the Transaction Price

The Company determines the transaction price as the amount of consideration it expects to receive in exchange for transferring promised goods or services to the customer. Amounts collected from customers for sales taxes are excluded from the transaction price.

If a contract includes a variable amount, such as a rebate, then the Company estimates the transaction price using either the expected value or the most likely amount of consideration to be received, depending upon the specific facts and circumstances. The Company includes estimated variable consideration in the transaction price only to the extent it is probable that a significant reversal of revenue will not occur when the uncertainty is resolved. The Company updates its estimate of variable consideration at the end of each reporting period to reflect changes in facts and circumstances.

Allocating the Transaction Price to the Performance Obligations

The Company allocates the transaction price to each performance obligation at contract inception based on a relative stand-alone selling price basis, or the price at which the Company would sell the good or service separately to similar customers in similar circumstances.

Recognizing Revenue When (or As) the Performance Obligations are Satisfied

The Company recognizes revenue when it transfers the promised goods or services to the customer. Revenue for standard products is recognized at the point in time when the customer obtains control of the goods, which is typically upon delivery when the customer has legal title, physical possession, the risks and rewards of ownership, and an enforceable obligation to pay for the products. Revenue for services, which are not material, are typically recognized over the time the services are provided.

Revenue for application-specific customer solutions is recognized at the point in time when the solution is validated, which is the point in time when the Company can objectively determine that the agreed-upon specifications in the contract have been met and the customer will accept the performance obligations in the arrangement. Although the customer may have taken legal title and physical possession of the goods when they arrived at the customer’s designed site, the significant risks and rewards of ownership transfer to the customer only upon validation.

In certain instances, an arrangement may include customer-specified acceptance provisions or performance guarantees that allow the customer to accept or reject delivered products that do not meet the customer’s specifications. If the Company can objectively determine that control of a good or service has been transferred to the customer in accordance with the agreed-upon specifications in the contract, then customer acceptance is a formality. If acceptance provisions are presumed to be substantive, then revenue is deferred until customer acceptance.

For the Company’s standard products and services, revenue recognition and billing typically occur at the same time. For application-specific customer solutions, however, the agreement with the customer may provide for billing terms which differ from revenue recognition criteria, resulting in either deferred revenue or unbilled revenue. Credit assessments are performed to determine payment terms, which vary by region, industry, and customer. Prepayment terms result in contract liabilities for customer deposits. When credit is granted to customers, payment is typically due 30 to 90 days from billing. The Company's contracts have an original expected duration of less than one year, and therefore as a practical expedient, the Company has elected to ignore the impact of the time value of money on a contract and to expense sales commissions. The Company recognizes an asset for costs to fulfill a contract if the costs relate directly to the contract and to future performance, and the costs are expected to be recovered.

Management exercises judgment when determining the amount of revenue to be recognized each period. Such judgments include, but are not limited to, assessing the customer’s ability and intention to pay substantially all of the contract consideration when due, determining when two or more contracts should be combined and accounted for as a single contract, determining whether a contract modification has occurred, assessing whether promises are immaterial in the context of the contract, determining whether material promises in a contract represent distinct performance obligations, estimating the transaction price for a contract that contains variable consideration, determining the stand-alone selling price of each performance obligation, determining whether control is transferred over time or at a point in time for performance obligations, and assessing whether formal customer acceptance provisions are substantive.

New Pronouncements

Accounting Standards Update (ASU) 2016-02, "Leases"

ASU 2016-02 creates Topic 842, Leases. The objective of this Update is to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet, and disclosing key information about leasing arrangements. This ASU applies to any entity that enters into a lease, although lessees will see the most significant changes. The main difference between current U.S. GAAP and Topic 842 is the recognition of lease assets and lease liabilities on the balance sheet for those leases classified as operating leases under current U.S. GAAP. Topic 842 distinguishes between finance leases and operating leases, which are substantially similar to the classification criteria for distinguishing between capital leases and operating leases under current U.S. GAAP. For public companies, the guidance in ASU 2016-02 is effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods. This ASU should be applied using a modified retrospective approach. Management is in the process of implementing this Update. As of the date of this report, management has determined the scope of leases subject to the new accounting requirements and has selected a software package to assist with compliance. Management is in the process of drafting the internal accounting lease policy and designing the related processes and internal controls.

Accounting Standards Update (ASU) 2016-13, "Financial Instruments - Measurement of Credit Losses"

ASU 2016-13 applies to all reporting entities holding financial assets that are not accounted for at fair value through net income (debt securities).  The amendments in this Update eliminate the probable initial recognition threshold to recognize a credit loss under current U.S. GAAP and, instead, reflect an entity’s current estimate of all expected credit losses. In addition, this Update broadens the information an entity must consider in developing the credit loss estimate, including the use of reasonable and supportable forecasted information.  The amendments in this Update require that credit losses on available-for-sale debt securities be presented as an allowance rather than as a write-down and an entity will be able to record reversals of credit losses in current period net income. For public companies, the guidance in ASU 2016-13 is effective for annual periods beginning after December 15, 2019, and interim periods within those annual periods.  This ASU should be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective.  Management does not expect ASU 2016-13 to have a material impact on the Company's financial statements and disclosures.

Accounting Standards Update (ASU) 2017-08, "Receivables - Nonrefundable Fees and Other Costs - Premium Amortization on Purchased Callable Debt Securities "

ASU 2017-08 applies to all reporting entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date (that is, at a premium). The amendments in this Update shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. Under current GAAP, premiums and discounts on callable debt securities generally are amortized to the maturity date. If that callable debt security is subsequently called, the entity records a loss equal to the unamortized premium. The amendments in this Update more closely align the amortization period of premiums and discounts to expectations incorporated in market pricing on the underlying securities. For public companies, the amendments in ASU 2017-08 are effective for annual periods beginning after December 15, 2019 and interim reporting periods within annual years beginning after December 15, 2020. This ASU should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption, and, in the period of adoption, the entity is required to provide disclosures about the change in accounting principle. Early adoption is permitted, including adoption in an interim period. Management does not expect ASU 2017-08 to have a material impact on the Company's financial statements and disclosures.

Accounting Standards Update (ASU) 2017-12, "Derivatives and Hedging - Targeted Improvements to Accounting for Hedging Activities"

ASU 2017-12 applies to all reporting entities that elect to apply hedge accounting. The hedge accounting requirements under current GAAP sometimes do not permit an entity to properly recognize the economic results of the hedging strategy in the financial statements, and they are difficult to understand and interpret. The amendments in this Update make certain targeted improvements to simplify the application of the hedge accounting guidance. Also, they better align the risk management activities and financial reporting for hedging relationships through changes to both 1) the designation and measurement guidance for qualifying hedging relationships and 2) the presentation of hedge results. For public companies, the amendments in ASU 2017-12 are effective for annual reporting periods beginning after December 15, 2018, and interim reporting periods within those annual periods. Early adoption is permitted including adoption in any interim period after issuance of the Update. All transition requirements and elections should be applied to hedging relationships existing on the date of adoption. The entity should apply a cumulative-effect adjustment related to eliminating the separate measurement of ineffectiveness to accumulated other comprehensive income with a corresponding adjustment to the opening balance of retained earnings as of the beginning of the fiscal year that an entity adopts the amendments in this Update. The amended presentation and disclosure guidance is required only prospectively. Management does not expect ASU 2017-12 to have a material impact on the Company's financial statements and disclosures.

Accounting Standards Update (ASU) 2018-1, "Land Easement Practical Expedient for Transition to Topic 842"

ASU 2018-01 applies to entities with land easements that exist or expired before an entity’s adoption of Topic 842, provided that the entity does not account for those land easements as leases under Topic 840. The amendments in this Update permit an entity to elect an optional transition practical expedient to not evaluate under Topic 842 land easements that exist or expired before the entity’s adoption of Topic 842 and that were not previously accounted for as leases under Topic 840. An entity that elects this practical expedient should apply the practical expedient consistently to all of its existing or expired land easements that were not previously accounted for as leases under Topic 840. Once an entity adopts Topic 842, it should apply that Topic prospectively to all new (or modified) land easements to determine whether the arrangement should be accounted for as a lease. An entity that does not elect this practical expedient should evaluate all existing or expired land easements in connection with the adoption of the new lease requirements in Topic 842 to assess whether they meet the definition of a lease. The amendments in this Update affect the amendments in Update 2016-02, which are not yet effective but may be early adopted. The effective date and transition requirements for the amendments are the same as the effective date and transition requirements in Update 2016-02, which is for annual periods beginning after December 15, 2018, and interim periods within those annual periods. Management is in the process of evaluating the impact of this Update.

Accounting Standards Update (ASU) 2018-2, "Income Statement - Reporting Comprehensive Income"

ASU 2018-02 applies to entities required to apply the provisions of Topic 220, Income Statement - Reporting Comprehensive Income, and has items of other comprehensive income for which the related tax effects are presented in other comprehensive income as required by GAAP. The amendments in this Update allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 (the "Tax Act"). Consequently, the amendments eliminate the stranded tax effects resulting from the Tax Act and will improve the usefulness of information reported to financial statement users. However, because the amendments only relate to the reclassification of the income tax effects of the Tax Act, the underlying guidance that requires the effect of a change in tax laws or rates to be included in income from continuing operations is not affected. The amendments in this Update also require certain disclosures about stranded tax effects. The amendments in this Update are effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption of the amendments in this Update is permitted, including adoption in any interim period. The amendments in this Update should be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Act is recognized. Management does not expect ASU 2018-2 to have a material impact on the Company's financial statements and disclosures.

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Fair Value Measurements (Tables)

3 Months Ended

Apr. 01, 2018

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table summarizes the financial assets and liabilities required to be measured at fair value on a recurring basis as of April 1, 2018 (in thousands):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)	Unobservable Inputs (Level 3)
Assets:
Money market instruments	$	7,958	—	$	—
Corporate bonds	—		380,621	—
Treasury bills	—		142,299	—
Asset-backed securities	—		131,678	—
Sovereign bonds	—		22,780	—
Municipal bonds	—		10,501	—
Agency bonds	—		5,931	—
Cash flow hedge forward contracts	—		—	—
Economic hedge forward contracts	—		4	—
Liabilities:
Cash flow hedge forward contracts	—		—	—
Economic hedge forward contracts	—		18	—
Contingent consideration liabilities	—		—	3,115

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

The following table summarizes the activity for the Company's liabilities measured at fair value using Level 3 inputs for the three-month period ended April 1, 2018 (in thousands):

Balance as of December 31, 2017	$	3,557
Fair value adjustment to Manatee contingent consideration	(675		)
Fair value adjustment to Chiaro contingent consideration	52
Fair value adjustment to GVi contingent consideration	181
Balance as of April 1, 2018	$	3,115

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Cash, Cash Equivalents, and Investments (Tables)

3 Months Ended

Apr. 01, 2018

Cash and Cash Equivalents [Abstract]

Components of Cash, Cash Equivalents, and Investments

Cash, cash equivalents, and investments consisted of the following (in thousands):

	April 1, 2018		December 31, 2017
Cash	$	101,614	$	97,951
Money market instruments	7,958		8,631
Cash and cash equivalents	109,572		106,582
Treasury bills	138,695		150,371
Corporate bonds	108,313		47,395
Asset-backed securities	75,432		59,203
Municipal bonds	9,153		8,805
Sovereign bonds	6,036		21,579
Agency bonds	—		10,608
Short-term investments	337,629		297,961
Corporate bonds	272,308		296,014
Asset-backed securities	56,246		71,727
Sovereign bonds	16,744		13,147
Agency bonds	5,931		14,890
Treasury bills	3,604		23,459
Municipal bonds	1,348		4,204
Long-term investments	356,181		423,441
	$	803,382	$	827,984

Summary of Available-for-Sale Investments

The following table summarizes the Company’s available-for-sale investments as of April 1, 2018 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Treasury bills	$	139,159	$	—	$	(464	)	$	138,695
Corporate bonds	108,533		50		(270		)	108,313
Asset-backed securities	75,710		5		(283		)	75,432
Municipal bonds	9,165		—		(12		)	9,153
Sovereign bonds	6,040		1		(5		)	6,036
Long-term:
Corporate bonds	272,345		797		(834		)	272,308
Asset-backed securities	56,573		14		(341		)	56,246
Sovereign bonds	16,779		38		(73		)	16,744
Agency bonds	5,930		1		—			5,931
Treasury bills	3,601		3		—			3,604
Municipal bonds	1,360		—		(12		)	1,348
	$	695,195	$	909	$	(2,294	)	$	693,810

Gross Unrealized Losses and Fair Values for Available-for-Sale Investments

The following table summarizes the Company’s gross unrealized losses and fair values for available-for-sale investments in an unrealized loss position as of April 1, 2018 (in thousands):

	Unrealized Loss Position For:
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	172,162	$	(812	)	$	23,693	$	(292	)	$	195,855	$	(1,104	)
Treasury bills	96,209		(277		)	42,487		(187		)	138,696		(464		)
Asset-backed securities	112,632		(614		)	2,640		(10		)	115,272		(624		)
Sovereign bonds	3,599		(9		)	8,730		(69		)	12,329		(78		)
Municipal bonds	4,196		(24		)	—		—			4,196		(24		)
Agency bonds	—		—			—		—			—		—
	$	388,798	$	(1,736	)	$	77,550	$	(558	)	$	466,348	$	(2,294	)

Effective Maturity Dates of Available-for-Sale Investments

The following table presents the effective maturity dates of the Company’s available-for-sale investments as of April 1, 2018 (in thousands):

	<1 year		1-2 Years		2-3 Years		3-4 Years		4-5 Years		5-7 Years		Total
Corporate bonds	$	108,313	$	116,223	$	97,412	$	36,342	$	18,961	$	3,370	$	380,621
Treasury bills	138,695		3,604		—		—		—		—		142,299
Asset-backed securities	75,432		35,411		6,923		6,504		2,336		5,072		131,678
Sovereign bonds	6,036		10,995		5,749		—		—		—		22,780
Municipal bonds	9,153		—		1,348		—		—		—		10,501
Agency bonds	—		—		—		—		5,931		—		5,931
	$	337,629	$	166,233	$	111,432	$	42,846	$	27,228	$	8,442	$	693,810

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Inventories (Tables)

3 Months Ended

Apr. 01, 2018

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consisted of the following (in thousands):

	April 1, 2018		December 31, 2017
Raw materials	$	42,759	$	33,927
Work-in-process	2,192		2,114
Finished goods	51,448		31,882
	$	96,399	$	67,923

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Intangible Assets (Tables)

3 Months Ended

Apr. 01, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Amortized intangible assets consisted of the following (in thousands):

	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Distribution networks	$	38,060	$	38,060	$	—
Completed technologies	13,687		4,791		8,896
Customer relationships	8,607		5,330		3,277
Non-compete agreements	370		123		247
Balance as of April 1, 2018	$	60,724	$	48,304	$	12,420
	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Distribution networks	$	38,060	$	38,060	$	—
Completed technologies	13,687		4,181		9,506
Customer relationships	8,607		5,202		3,405
Non-compete agreements	370		92		278
Balance as of December 31, 2017	$	60,724	$	47,535	$	13,189

Schedule of Intangible Assets, Future Amortization Expense

As of April 1, 2018, estimated future amortization expense related to intangible assets is as follows (in thousands):

Year Ended December 31,	Amount
Remainder of fiscal 2018	$	2,307
2019	2,701
2020	2,185
2021	2,017
2022	1,691
2023	989
Thereafter	530
	$	12,420

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Warranty Obligations (Tables)

3 Months Ended

Apr. 01, 2018

Product Warranties Disclosures [Abstract]

Changes in Warranty Obligations

The changes in the warranty obligation were as follows (in thousands):

Balance as of December 31, 2017	$	4,701
Provisions for warranties issued during the period	697
Fulfillment of warranty obligations	(802		)
Foreign exchange rate changes	116
Balance as of April 1, 2018	$	4,712

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Derivative Instruments (Tables)

3 Months Ended

Apr. 01, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Outstanding Forward Contracts Table

The Company had the following outstanding forward contracts (in thousands):

	April 1, 2018			December 31, 2017
Currency	Notional Value	USD Equivalent		Notional Value	USD Equivalent
Derivatives Not Designated as Hedging Instruments:
Japanese Yen	565,000	$	5,299	455,000	$	4,049
Swiss Franc	1,600	2,072		1,365	1,401
British Pound	1,300	1,824		1,650	2,232
Hungarian Forint	400,000	1,576		545,000	2,110
Taiwanese Dollar	43,000	1,480		37,725	1,278
Korean Won	655,000	616		1,825,000	1,708

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

Information regarding the fair value of the outstanding forward contracts was as follows (in thousands):

	Asset Derivatives					Liability Derivatives
	Balance	Fair Value				Balance	Fair Value
	Sheet Location	April 1, 2018		December 31, 2017		Sheet Location	April 1, 2018		December 31, 2017
Derivatives Designated as Hedging Instruments:
Cash flow hedge forward contracts	Prepaid expenses and other current assets	$	—	$	—	Accrued expenses	$	—	$	—
Economic hedge forward contracts	Prepaid expenses and other current assets	$	4	$	16	Accrued expenses	$	18	$	13

Offsetting Assets

The following table presents the gross activity for all derivative assets and liabilities which were presented on a net basis on the Consolidated Balance Sheets due to the right of offset with each counterparty (in thousands):

Asset Derivatives					Liability Derivatives
	April 1, 2018		December 31, 2017			April 1, 2018		December 31, 2017
Gross amounts of recognized assets	$	4	$	16	Gross amounts of recognized liabilities	$	18	$	13
Gross amounts offset	—		—		Gross amounts offset	—		—
Net amount of assets presented	$	4	$	16	Net amount of liabilities presented	$	18	$	13

Derivative Instruments, Gain (Loss)

Information regarding the effect of derivative instruments on the consolidated financial statements was as follows (in thousands):

	Location in Financial Statements	Three-months Ended
		April 1, 2018			April 2, 2017
Derivatives Designated as Hedging Instruments:
Gains (losses) recorded in shareholders' equity (effective portion)	Accumulated other comprehensive income (loss), net of tax	$	—		$	10
Gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations (effective portion)	Revenue	$	—		$	(55	)
	Research, development, and engineering expenses	—			3
	Selling, general, and administrative expenses	—			8
	Total gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations	$	—		$	(44	)
Gains (losses) recognized in current operations (ineffective portion and discontinued derivatives)	Foreign currency gain (loss)	$	—		$	—
Derivatives Not Designated as Hedging Instruments:
Gains (losses) recognized in current operations	Foreign currency gain (loss)	$	(310	)	$	(81	)

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Revenue Recognition (Tables)

3 Months Ended

Apr. 01, 2018

Revenue from Contract with Customer [Abstract]

Schedule of Adoption of New Accounting Principles

The adoption of the standard impacted our previously-reported results as follows (in thousands):

Statement of Operations
	Three-months ended
	April 2, 2017
	As previously reported			Adjustment			As restated
Revenue	$	134,942		$	4,097		$	139,039
Cost of revenue	28,225			4,307			32,532
Gross margin	106,717			(210		)	106,507
Operating income	37,426			(210		)	37,216
Income before income tax expense	39,445			(210		)	39,235
Income tax expense (benefit)	(6,210		)	(26		)	(6,236		)
Net income	$	45,655		$	(184	)	$	45,471
Net income per weighted-average common and common-equivalend share:
Basic	$	0.26		$	—		$	0.26
Diluted	$	0.26		$	(0.01	)	$	0.25

Balance Sheet
	December 31, 2017
	As previously reported		Adjustment			As restated
Prepaid expenses and other current assets	$	30,800	$	(117	)	$	30,683
Accrued income taxes	11,391		112			11,503
Deferred revenue and customer deposits	9,969		(549		)	9,420
Retained earnings	668,267		320			668,587

Disaggregation of Revenue

The following table summarizes disaggregated revenue information by geographic area based upon the customer's country of domicile (in thousands):

	Three-months ended
	April 1, 2018		April 2, 2017
Americas	$	59,217	$	42,540
Europe	56,203		43,107
Greater China	27,159		22,706
Other Asia	26,988		30,686
	$	169,567	$	139,039

The following table summarizes disaggregated revenue information by revenue type (in thousands):

	Three-months ended
	April 1, 2018		April 2, 2017
Standard products and services	$	158,399	$	133,017
Application-specific customer solutions	11,168		6,022
	$	169,567	$	139,039

Summary of Deferred Revenue and Customer Deposits Activity

The following table summarizes the deferred revenue and customer deposits activity for the three-month period ended April 1, 2018 (in thousands):

	Amount
Balance as of December 31, 2017	$	9,420
Increases to deferred revenue and customer deposits	11,751
Recognition of revenue	(5,875		)
Foreign exchange rate changes	208
Balance as of April 1, 2018	$	15,504

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Stock-Based Compensation Expense (Tables)

3 Months Ended

Apr. 01, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Stock Option Activity

The following table summarizes the Company’s stock option activity for the three-month period ended April 1, 2018:

	Shares (in thousands)		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2017	12,726		$	25.24
Granted	2,043		56.44
Exercised	(697	)	15.96
Forfeited or expired	(68	)	25.84
Outstanding as of April 1, 2018	14,004		$	30.25	7.9	$	317,169
Exercisable as of April 1, 2018	4,879		$	19.88	6.5	$	156,676
Options vested or expected to vest as of April 1, 2018 (1)	12,377		$	28.99	7.8	$	294,379

(1) In addition to the vested options, the Company expects a portion of the unvested options to vest at some point in the future. Options expected to vest are calculated by applying an estimated forfeiture rate to the unvested options.

Weighted-Average Assumptions Used in Estimating Fair Values of Stock Options Granted

The fair values of stock options granted in each period presented were estimated using the following weighted-average assumptions:

	Three-months Ended
	April 1, 2018		April 2, 2017
Risk-free rate	2.9	%	2.4	%
Expected dividend yield	0.32	%	0.39	%
Expected volatility	39	%	41	%
Expected term (in years)	5.3		5.3

Nonvested Restricted Stock Shares Activity

The following table summarizes the Company's restricted stock activity for the three-month period ended April 1, 2018:

	Shares (in thousands)	Weighted-Average Grant Fair Value		Aggregate Intrinsic Value (in thousands)(1)
Nonvested as of December 31, 2017	20	$	17.03
Granted	—	—
Vested	—	—
Forfeited or expired	—	—
Nonvested as of April 1, 2018	20	$	17.03	$	1,040

(1) Fair market value as of April 1, 2018.

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The following table presents the stock-based compensation expense by caption for each period presented on the Consolidated Statements of Operations (in thousands):

	Three-months Ended
	April 1, 2018		April 2, 2017
Cost of revenue	$	797	$	430
Research, development, and engineering	4,815		2,610
Selling, general, and administrative	7,582		4,443
	$	13,194	$	7,483

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Taxes (Tables)

3 Months Ended

Apr. 01, 2018

Income Tax Disclosure [Abstract]

Reconciliation of United States Federal Statutory Corporate Tax Rate to Company's Effective Tax Rate, or Income Tax Provision

A reconciliation of the United States federal statutory corporate tax rate to the Company’s income tax expense, or effective tax rate, was as follows:

	Three-months Ended
	April 1, 2018		April 2, 2017
Income tax provision at federal statutory corporate tax rate	21	%	35	%
State income taxes, net of federal benefit	1	%	1	%
Foreign tax rate differential	(7	)%	(18	)%
Tax credit	(1	)%	(1	)%
Discrete tax benefit related to stock option exercises	(13	)%	(33	)%
Other discrete tax events	—	%	(1	)%
Other	1	%	1	%
Income tax provision	2	%	(16	)%

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Weighted-Average Shares (Tables)

3 Months Ended

Apr. 01, 2018

Earnings Per Share [Abstract]

Calculation of Weighted-Average Shares

Weighted-average shares were calculated as follows (in thousands):

	Three-months Ended
	April 1, 2018	April 2, 2017
Basic weighted-average common shares outstanding	173,280	172,646
Effect of dilutive stock options	6,361	5,708
Weighted-average common and common-equivalent shares outstanding	179,641	178,354

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Apr. 01, 2018	Dec. 31, 2017
Assets:
Money market instruments	$ 7,958	$ 8,631
Financial assets at fair value	693,810
Corporate bonds
Assets:
Financial assets at fair value	380,621
Treasury bills
Assets:
Financial assets at fair value	142,299
Asset-backed securities
Assets:
Financial assets at fair value	131,678
Sovereign bonds
Assets:
Financial assets at fair value	22,780
Municipal bonds
Assets:
Financial assets at fair value	10,501
Agency bonds
Assets:
Financial assets at fair value	5,931
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Money market instruments	7,958
Cash flow hedge forward contracts	0
Economic hedge forward contracts	0
Liabilities:
Cash flow hedge forward contracts	0
Economic hedge forward contracts	0
Contingent consideration liabilities	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate bonds
Assets:
Financial assets at fair value	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Treasury bills
Assets:
Financial assets at fair value	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed securities
Assets:
Financial assets at fair value	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Sovereign bonds
Assets:
Financial assets at fair value	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal bonds
Assets:
Financial assets at fair value	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Agency bonds
Assets:
Financial assets at fair value	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Assets:
Money market instruments	0
Cash flow hedge forward contracts	0
Economic hedge forward contracts	4
Liabilities:
Cash flow hedge forward contracts	0
Economic hedge forward contracts	18
Contingent consideration liabilities	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Corporate bonds
Assets:
Financial assets at fair value	380,621
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Treasury bills
Assets:
Financial assets at fair value	142,299
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Asset-backed securities
Assets:
Financial assets at fair value	131,678
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Sovereign bonds
Assets:
Financial assets at fair value	22,780
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Municipal bonds
Assets:
Financial assets at fair value	10,501
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Agency bonds
Assets:
Financial assets at fair value	5,931
Fair Value, Measurements, Recurring | Unobservable Inputs (Level 3)
Assets:
Money market instruments	0
Cash flow hedge forward contracts	0
Economic hedge forward contracts	0
Liabilities:
Cash flow hedge forward contracts	0
Economic hedge forward contracts	0
Contingent consideration liabilities	3,115
Fair Value, Measurements, Recurring | Unobservable Inputs (Level 3) | Corporate bonds
Assets:
Financial assets at fair value	0
Fair Value, Measurements, Recurring | Unobservable Inputs (Level 3) | Treasury bills
Assets:
Financial assets at fair value	0
Fair Value, Measurements, Recurring | Unobservable Inputs (Level 3) | Asset-backed securities
Assets:
Financial assets at fair value	0
Fair Value, Measurements, Recurring | Unobservable Inputs (Level 3) | Sovereign bonds
Assets:
Financial assets at fair value	0
Fair Value, Measurements, Recurring | Unobservable Inputs (Level 3) | Municipal bonds
Assets:
Financial assets at fair value	0
Fair Value, Measurements, Recurring | Unobservable Inputs (Level 3) | Agency bonds
Assets:
Financial assets at fair value	$ 0

XML

Fair Value Measurements - Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - Unobservable Inputs (Level 3) - Fair Value, Measurements, Recurring $ in Thousands	3 Months Ended
	Apr. 01, 2018 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 3,557
Ending balance	3,115
Fair value adjustment to Manatee contingent consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value adjustment to contingent consideration	(675)
Fair value adjustment to Chiaro contingent consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value adjustment to contingent consideration	52
Fair value adjustment to GVi contingent consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value adjustment to contingent consideration	$ 181

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Cash, Cash Equivalents, and Investments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Cash and Cash Equivalents [Abstract]
Gross realized gains on sale of investments	$ 55	$ 88
Gross realized losses on sale of investments	$ 33	$ 23

XML

Cash, Cash Equivalents, and Investments - Components of Cash, Cash Equivalents, and Investments (Detail) - USD ($) $ in Thousands	Apr. 01, 2018	Dec. 31, 2017	Apr. 02, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Cash	$ 101,614	$ 97,951
Money market instruments	7,958	8,631
Cash and cash equivalents	109,572	106,582	$ 92,428	$ 79,641
Short-term investments	337,629	297,961
Long-term investments	356,181	423,441
Total	803,382	827,984
Treasury bills
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	138,695	150,371
Long-term investments	3,604	23,459
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	75,432	59,203
Long-term investments	56,246	71,727
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	108,313	47,395
Long-term investments	272,308	296,014
Agency bonds
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	0	10,608
Long-term investments	5,931	14,890
Sovereign bonds
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	6,036	21,579
Long-term investments	16,744	13,147
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	9,153	8,805
Long-term investments	$ 1,348	$ 4,204

XML

Cash, Cash Equivalents, and Investments - Summary of Available-for-Sale Investments (Detail) $ in Thousands	Apr. 01, 2018 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 695,195
Gross unrealized gains	909
Gross unrealized losses	(2,294)
Fair value	693,810
Treasury bills
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(464)
Treasury bills | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	139,159
Gross unrealized gains	0
Gross unrealized losses	(464)
Fair value	138,695
Treasury bills | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,601
Gross unrealized gains	3
Gross unrealized losses	0
Fair value	3,604
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(1,104)
Corporate bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	108,533
Gross unrealized gains	50
Gross unrealized losses	(270)
Fair value	108,313
Corporate bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	272,345
Gross unrealized gains	797
Gross unrealized losses	(834)
Fair value	272,308
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(624)
Asset-backed securities | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	75,710
Gross unrealized gains	5
Gross unrealized losses	(283)
Fair value	75,432
Asset-backed securities | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	56,573
Gross unrealized gains	14
Gross unrealized losses	(341)
Fair value	56,246
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(24)
Municipal bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	9,165
Gross unrealized gains	0
Gross unrealized losses	(12)
Fair value	9,153
Municipal bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	1,360
Gross unrealized gains	0
Gross unrealized losses	(12)
Fair value	1,348
Sovereign bonds
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(78)
Sovereign bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	6,040
Gross unrealized gains	1
Gross unrealized losses	(5)
Fair value	6,036
Sovereign bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	16,779
Gross unrealized gains	38
Gross unrealized losses	(73)
Fair value	16,744
Agency bonds
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	0
Agency bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	5,930
Gross unrealized gains	1
Gross unrealized losses	0
Fair value	$ 5,931

XML

Cash, Cash Equivalents, and Investments - Gross Unrealized Losses and Fair Values for Available-for-Sale Investments (Detail) $ in Thousands	Apr. 01, 2018 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	$ 388,798
Unrealized losses, less than 12 months	(1,736)
Fair value, 12 months or greater	77,550
Unrealized losses, 12 months or greater	(558)
Total fair value	466,348
Total unrealized losses	(2,294)
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	172,162
Unrealized losses, less than 12 months	(812)
Fair value, 12 months or greater	23,693
Unrealized losses, 12 months or greater	(292)
Total fair value	195,855
Total unrealized losses	(1,104)
Treasury bills
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	96,209
Unrealized losses, less than 12 months	(277)
Fair value, 12 months or greater	42,487
Unrealized losses, 12 months or greater	(187)
Total fair value	138,696
Total unrealized losses	(464)
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	112,632
Unrealized losses, less than 12 months	(614)
Fair value, 12 months or greater	2,640
Unrealized losses, 12 months or greater	(10)
Total fair value	115,272
Total unrealized losses	(624)
Sovereign bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	3,599
Unrealized losses, less than 12 months	(9)
Fair value, 12 months or greater	8,730
Unrealized losses, 12 months or greater	(69)
Total fair value	12,329
Total unrealized losses	(78)
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	4,196
Unrealized losses, less than 12 months	(24)
Fair value, 12 months or greater	0
Unrealized losses, 12 months or greater	0
Total fair value	4,196
Total unrealized losses	(24)
Agency bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	0
Unrealized losses, less than 12 months	0
Fair value, 12 months or greater	0
Unrealized losses, 12 months or greater	0
Total fair value	0
Total unrealized losses	$ 0

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Cash, Cash Equivalents, and Investments - Effective Maturity Dates of Available-for-Sale Investments (Detail) $ in Thousands	Apr. 01, 2018 USD ($)
Schedule of Available-for-sale Securities [Line Items]
1 year or less	$ 337,629
1-2 years	166,233
2-3 years	111,432
3-4 years	42,846
4-5 years	27,228
5-7 years	8,442
Fair value	693,810
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	108,313
1-2 years	116,223
2-3 years	97,412
3-4 years	36,342
4-5 years	18,961
5-7 years	3,370
Fair value	380,621
Treasury bills
Schedule of Available-for-sale Securities [Line Items]
1 year or less	138,695
1-2 years	3,604
2-3 years	0
3-4 years	0
4-5 years	0
5-7 years	0
Fair value	142,299
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
1 year or less	75,432
1-2 years	35,411
2-3 years	6,923
3-4 years	6,504
4-5 years	2,336
5-7 years	5,072
Fair value	131,678
Sovereign bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	6,036
1-2 years	10,995
2-3 years	5,749
3-4 years	0
4-5 years	0
5-7 years	0
Fair value	22,780
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	9,153
1-2 years	0
2-3 years	1,348
3-4 years	0
4-5 years	0
5-7 years	0
Fair value	10,501
Agency bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	0
1-2 years	0
2-3 years	0
3-4 years	0
4-5 years	5,931
5-7 years	0
Fair value	$ 5,931

XML

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Apr. 01, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 42,759	$ 33,927
Work-in-process	2,192	2,114
Finished goods	51,448	31,882
Inventories	$ 96,399	$ 67,923

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Intangible Assets (Details) - USD ($) $ in Thousands	Apr. 01, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 60,724	$ 60,724
Accumulated Amortization	48,304	47,535
Net Carrying Value	12,420	13,189
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of fiscal 2018	2,307
2019	2,701
2020	2,185
2021	2,017
2022	1,691
2023	989
Thereafter	530
Net Carrying Value	12,420	13,189
Distribution networks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	38,060	38,060
Accumulated Amortization	38,060	38,060
Net Carrying Value	0	0
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net Carrying Value	0	0
Completed technologies
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	13,687	13,687
Accumulated Amortization	4,791	4,181
Net Carrying Value	8,896	9,506
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net Carrying Value	8,896	9,506
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	8,607	8,607
Accumulated Amortization	5,330	5,202
Net Carrying Value	3,277	3,405
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net Carrying Value	3,277	3,405
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	370	370
Accumulated Amortization	123	92
Net Carrying Value	247	278
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net Carrying Value	$ 247	$ 278

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Warranty Obligations - Changes in Warranty Obligations (Detail) $ in Thousands	3 Months Ended
	Apr. 01, 2018 USD ($)
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 4,701
Provisions for warranties issued during the period	697
Fulfillment of warranty obligations	(802)
Foreign exchange rate changes	116
Ending balance	$ 4,712

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Derivative Instruments (Detail)	3 Months Ended
	Apr. 01, 2018 Category
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Number of Instruments Held	2
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Remaining maturity of foreign currency derivatives (up to)	45 days
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum length of time hedged in cash flow hedge	18 months

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Derivative Instruments - Outstanding Forward Contracts Table (Detail) - Not Designated as Hedging Instrument ₩ in Thousands, ¥ in Thousands, £ in Thousands, SFr in Thousands, Ft in Thousands, $ in Thousands, $ in Thousands	Apr. 01, 2018 HUF (Ft)	Apr. 01, 2018 GBP (£)	Apr. 01, 2018 CHF (SFr)	Apr. 01, 2018 JPY (¥)	Apr. 01, 2018 KRW (₩)	Apr. 01, 2018 TWD ($)	Apr. 01, 2018 USD ($)	Dec. 31, 2017 HUF (Ft)	Dec. 31, 2017 GBP (£)	Dec. 31, 2017 CHF (SFr)	Dec. 31, 2017 JPY (¥)	Dec. 31, 2017 KRW (₩)	Dec. 31, 2017 TWD ($)	Dec. 31, 2017 USD ($)
Japanese Yen
Derivative [Line Items]
Outstanding forward contracts				¥ 565,000			$ 5,299				¥ 455,000			$ 4,049
Swiss Franc
Derivative [Line Items]
Outstanding forward contracts			SFr 1,600				2,072			SFr 1,365				1,401
British Pound
Derivative [Line Items]
Outstanding forward contracts		£ 1,300					1,824		£ 1,650					2,232
Hungarian Forint
Derivative [Line Items]
Outstanding forward contracts	Ft 400,000						1,576	Ft 545,000						2,110
Taiwanese Dollar
Derivative [Line Items]
Outstanding forward contracts						$ 43,000	1,480						$ 37,725	1,278
Korean Won
Derivative [Line Items]
Outstanding forward contracts					₩ 655,000		$ 616					₩ 1,825,000		$ 1,708

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Derivative Instruments - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Detail) - USD ($) $ in Thousands	Apr. 01, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative asset	$ 4	$ 16
Derivative liability	18	13
Designated as Hedging Instrument | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset	0	0
Designated as Hedging Instrument | Accrued Expenses
Derivatives, Fair Value [Line Items]
Derivative liability	0	0
Not Designated as Hedging Instrument | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset	4	16
Not Designated as Hedging Instrument | Accrued Expenses
Derivatives, Fair Value [Line Items]
Derivative liability	$ 18	$ 13

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Derivative Instruments - Offsetting Assets (Detail) - USD ($) $ in Thousands	Apr. 01, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross amounts of recognized assets	$ 4	$ 16
Gross amounts offset	0	0
Net amount of assets presented	4	16
Gross amounts of recognized liabilities	18	13
Gross amounts offset	0	0
Net amount of liabilities presented	$ 18	$ 13

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Derivative Instruments - Derivative Instruments, Gain (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations	$ 0	$ (44)
Designated as Hedging Instrument | Accumulated Other Comprehensive Income (Loss), Net of Tax
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recorded in shareholders' equity (effective portion)	0	10
Designated as Hedging Instrument | Product Revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations (effective portion)	0	(55)
Designated as Hedging Instrument | Research, Development, and Engineering Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations (effective portion)	0	3
Designated as Hedging Instrument | Selling, General, and Administrative Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations (effective portion)	0	8
Designated as Hedging Instrument | Foreign Currency Gain (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in current operations (ineffective portion and discontinued derivatives)	0	0
Not Designated as Hedging Instrument | Foreign Currency Gain (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in current operations	$ (310)	$ (81)

XML

Revenue Recognition (Details) - USD ($)	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue	$ 169,567,000	$ 139,039,000
Cost of revenue	40,198,000	32,532,000
Gross margin	129,369,000	106,507,000
Operating income	34,596,000	37,216,000
Income before income tax expense	37,979,000	39,235,000
Income tax expense (benefit)	762,000	(6,236,000)
Net income	$ 37,217,000	$ 45,471,000
Basic (in dollars per share)	$ 0.21	$ 0.26
Diluted (in dollars per share)	$ 0.21	$ 0.25
Prepaid expenses and other current assets	$ 26,068,000		$ 30,683,000
Accrued income taxes	11,915,000		11,503,000
Deferred revenue and customer deposits	15,504,000		9,420,000
Retained earnings	622,856,000		668,587,000
Revenues	169,567,000	$ 139,039,000
Costs to fulfill a contract	4,615,000		3,230,000
Change in Contract with Customer, Asset [Abstract]
Balance as of December 31, 2017	9,420,000
Increases to deferred revenue and customer deposits	11,751,000
Recognition of revenue	(5,875,000)
Foreign exchange rate changes	208,000
Balance as of April 1, 2018	15,504,000
Standard products and services
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	158,399,000	133,017
Application-specific customer solutions
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	11,168,000	6,022
Americas
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	59,217,000	42,540,000
Europe
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	56,203,000	43,107,000
Greater China
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	27,159,000	22,706,000
Other Asia
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	$ 26,988,000	30,686,000
As previously reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		134,942,000
Cost of revenue		28,225,000
Gross margin		106,717,000
Operating income		37,426,000
Income before income tax expense		39,445,000
Income tax expense (benefit)		(6,210,000)
Net income		$ 45,655,000
Basic (in dollars per share)		$ 0.26
Diluted (in dollars per share)		$ 0.26
Prepaid expenses and other current assets			30,800,000
Accrued income taxes			11,391,000
Deferred revenue and customer deposits			9,969,000
Retained earnings			668,267,000
Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		$ 4,097,000
Cost of revenue		4,307,000
Gross margin		(210,000)
Operating income		(210,000)
Income before income tax expense		(210,000)
Income tax expense (benefit)		(26,000)
Net income		$ (184,000)
Basic (in dollars per share)		$ 0
Diluted (in dollars per share)		$ (10)
Prepaid expenses and other current assets			(117,000)
Accrued income taxes			112,000
Deferred revenue and customer deposits			(549,000)
Retained earnings			$ 320,000

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Stock-Based Compensation Expense (Detail)	3 Months Ended
	Apr. 01, 2018 USD ($) group $ / shares shares	Apr. 02, 2017 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, performance-based restricted stock, years	1 year
Vesting period, time-based restricted stock, years	3 years
Groups within the employee population | group	2
Estimated annual forfeiture rate for unvested options for senior management	8.00%
Estimated annual forfeiture rate for unvested options for all other employees	12.00%
Increase (decrease) to compensation expense	$ 1,283,000	$ 673,000
Weighted-average grant-date fair values, in dollars per share | $ / shares	$ 21.62	$ 14.95
Total intrinsic value	$ 28,088,000	$ 53,043,000
Total fair values of stock options vest	25,674,000	17,987,000
Unrecognized compensation expense	$ 63,749,000
Weighted average period to be recognized	2 years 7 days
Stock-based compensation expense	$ 13,194,000	7,483,000
Tax benefit from compensation expense	2,347,000	$ 2,439,000
Recognized period costs capitalized	$ 0
General Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for stock option plans	4 years
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under stock option plans | shares	10,160,452
Expiration period from grant day	10 years

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Stock-Based Compensation Expense - Summary of Stock Option Activity (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2018 USD ($) $ / shares shares
Shares (in thousands)
Outstanding, shares | shares	12,726
Granted, shares | shares	2,043
Exercised, shares | shares	(697)
Forfeited or expired, shares | shares	(68)
Outstanding, shares | shares	14,004
Exercisable as of reporting date, shares | shares	4,879
Options vested or expected to vest as of reporting date, shares | shares	12,377
Weighted- Average Exercise Price
Outstanding, in dollars per share | $ / shares	$ 25.24
Granted, in dollars per share | $ / shares	56.44
Exercised, in dollars per share | $ / shares	15.96
Forfeited or expired, in dollars per share | $ / shares	25.84
Outstanding, in dollars per share | $ / shares	30.25
Exercisable as of reporting date, Weighted-Average Exercise Price, in dollars per share | $ / shares	19.88
Options vested or expected to vest as of period end (in dollars per share) | $ / shares	$ 28.99
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, in years	7 years 10 months 24 days
Exercisable, in years	6 years 6 months
Options vested or expected to vest, in years	7 years 9 months 18 days
Aggregate Intrinsic Value (in thousands)
Outstanding, in dollars | $	$ 317,169
Exercisable, in dollars | $	156,676
Options vested or expected to vest, in dollars | $	$ 294,379

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Stock-Based Compensation Expense - Weighted-Average Assumptions Used in Estimating Fair Values of Stock Options Granted (Detail)	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free rate	2.90%	2.40%
Expected dividend yield	0.32%	0.39%
Expected volatility	39.00%	41.00%
Expected term (in years)	5 years 3 months 18 days	5 years 3 months 18 days

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Stock-Based Compensation Expense - Nonvested Restricted Stock Shares Activity (Details) - Restricted Stock $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2018 USD ($) $ / shares shares
Shares (in thousands)
Nonvested, shares | shares	20
Granted, shares | shares	0
Vested, shares | shares	0
Forfeited or expired, shares | shares	0
Nonvested, shares | shares	20
Weighted-Average Grant Fair Value
Nonvested, in dollars per share | $ / shares	$ 17.03
Granted, in dollars per share | $ / shares	0.00
Vested, in dollars per share | $ / shares	0.00
Forfeited or expired, in dollars per share | $ / shares	0.00
Nonvested, in dollars per share | $ / shares	$ 17.03
Aggregate Intrinsic Value (in thousands)(1)
Nonvested as of April 1, 2018 | $	$ 1,040

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Stock-Based Compensation Expense - Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 13,194	$ 7,483
Cost of Revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	797	430
Research, Development, and Engineering Expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	4,815	2,610
Selling, General, and Administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 7,582	$ 4,443

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Stock Repurchase Program (Detail) - USD ($) shares in Thousands	3 Months Ended
	Apr. 01, 2018	Feb. 28, 2018	Nov. 01, 2015
Equity, Class of Treasury Stock [Line Items]
Authorized common stock to be repurchased	$ 200,000,000
Stock repurchased during period, Value	$ 69,202,000
Repurchase Program April 2017
Equity, Class of Treasury Stock [Line Items]
Authorized common stock to be repurchased			$ 100,000,000
Number of shares repurchased	1,744
Value of shares repurchased	$ 100,000,000
Repurchase of common stock (in shares)	803
Stock repurchased during period, Value	$ 45,200,000
Repurchase Program February 2018
Equity, Class of Treasury Stock [Line Items]
Authorized common stock to be repurchased		$ 150,000,000
Repurchase of common stock (in shares)	453
Stock repurchased during period, Value	$ 24,002,000
Remaining authorized purchase amount	125,998,000
Repurchase Program April 2017 and February 2018
Equity, Class of Treasury Stock [Line Items]
Stock repurchased during period, Value	$ 69,202,000

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Taxes - Reconciliation of United States Federal Statutory Corporate Tax Rate to Company's Effective Tax Rate, or Income Tax Provision (Detail)	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Income Tax Disclosure [Abstract]
Income tax provision at federal statutory corporate tax rate	21.00%	35.00%
State income taxes, net of federal benefit	1.00%	1.00%
Foreign tax rate differential	(7.00%)	(18.00%)
Tax credit	(1.00%)	(1.00%)
Discrete tax benefit related to stock option exercises	13.00%	33.00%
Other discrete tax events	0.00%	(1.00%)
Other	1.00%	1.00%
Income tax provision	2.00%	(16.00%)

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Taxes (Detail) - USD ($) $ in Thousands		3 Months Ended
	Jan. 01, 2018	Apr. 01, 2018	Apr. 02, 2017	Dec. 31, 2017
Income Tax [Line Items]
Income tax provision at federal statutory corporate tax rate		21.00%	35.00%
Foreign tax rate differential		7.00%	18.00%
Discrete tax benefit related to stock option exercises		13.00%	33.00%
Increase in reserves for income taxes, net of deferred tax benefit		$ 484
Interest and penalties included in reserve		70
Liability for uncertain tax positions		7,986
Reserve for income taxes classified as a noncurrent iability		6,958		$ 6,488
Reserve for income taxes classified an noncurrent deferred tax assets		1,028
Interest and penalties, gross		847
Minimum decrease in income tax expense due to release in reserves		1,100
Maximum decrease in income tax expense due to release in reserves		$ 1,200
Tax years open to examination by Internal Revenue Service		2014 through 2017
Tax years open to examination by various taxing authorities for other entities		2013 through 2017
Accounting Standards Update 2016-16
Income Tax [Line Items]
Cumulative effect on retained earnings	$ 5,961
Foreign tax authority | Ireland
Income Tax [Line Items]
Income tax provision at federal statutory corporate tax rate		12.50%
Foreign tax authority | China
Income Tax [Line Items]
Income tax provision at federal statutory corporate tax rate		25.00%

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Weighted-Average Shares - Calculation of Weighted-Average Shares (Detail) - shares shares in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Earnings Per Share [Abstract]
Basic weighted-average common shares outstanding	173,280	172,646
Effect of dilutive stock options	6,361	5,708
Weighted-average common and common-equivalent shares outstanding	179,641	178,354

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Weighted-Average Shares (Detail) - shares	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Earnings Per Share [Abstract]
Stock options to purchase anti-dilutive common stock	1,339,000	1,648,000

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Subsequent Events (Details) - USD ($)	Apr. 30, 2018	Apr. 25, 2018	Apr. 01, 2018
Subsequent Event [Line Items]
Authorized common stock to be repurchased			$ 200,000,000
Subsequent Event
Subsequent Event [Line Items]
Authorized common stock to be repurchased		$ 300,000,000
Dividends (in dollars per share)	$ 0.045
Dividends payable, date payable	Jun. 01, 2018
Dividends payable, date of record	May 18, 2018
General Stock Option Plan | Subsequent Event
Subsequent Event [Line Items]
Authorized common stock to be repurchased		$ 10,000,000