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 October 1, 2017 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.______

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 October 1, 2017, there were 86,586,599 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 and nine-month periods ended October 1, 2017 and October 2, 2016	3
	Consolidated Statements of Comprehensive Income for the three-month and nine-month periods ended October 1, 2017 and October 2, 2016	4
	Consolidated Balance Sheets as of October 1, 2017 and December 31, 2016	5
	Consolidated Statements of Cash Flows for the nine-month periods ended October 1, 2017 and October 2, 2016	6
	Consolidated Statement of Shareholders’ Equity for the nine-month period ended October 1, 2017	7
	Notes to Consolidated Financial Statements	8
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	25
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	29
Item 4.	Controls and Procedures	29
PART II	OTHER INFORMATION
Item 1.	Legal Proceedings	30
Item 1A.	Risk Factors	30
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	30
Item 3.	Defaults Upon Senior Securities	30
Item 4.	Mine Safety Disclosures	30
Item 5.	Other Information	30
Item 6.	Exhibits	31
	Signatures	32

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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						Nine-months Ended
	October 1, 2017			October 2, 2016			October 1, 2017			October 2, 2016
	(unaudited)						(unaudited)
Revenue	$	259,739		$	147,952		$	567,585		$	391,431
Cost of revenue	62,360			32,749			128,056			88,930
Gross margin	197,379			115,203			439,529			302,501
Research, development, and engineering expenses	26,078			18,603			72,225			58,829
Selling, general, and administrative expenses	61,054			42,072			160,093			123,125
Operating income	110,247			54,528			207,211			120,547
Foreign currency gain (loss)	(127		)	(607		)	(574		)	(377		)
Investment income	2,475			2,047			6,625			4,631
Other income (expense)	(445		)	374			(344		)	803
Income from continuing operations before income tax expense	112,150			56,342			212,918			125,604
Income tax expense (benefit) on continuing operations	9,802			2,667			8,843			14,030
Net income from continuing operations	102,348			53,675			204,075			111,574
Net income (loss) from discontinued operations (Note 14)	—			—			—			(255		)
Net income	$	102,348		$	53,675		$	204,075		$	111,319
Basic earnings per weighted-average common and common-equivalent share:
Net income from continuing operations	$	1.18		$	0.63		$	2.36		$	1.31
Net income (loss) from discontinued operations	$	—		$	—		$	—		$	—
Net income	$	1.18		$	0.63		$	2.36		$	1.31
Diluted earnings per weighted-average common and common-equivalent share:
Net income from continuing operations	$	1.14		$	0.61		$	2.28		$	1.29
Net income (loss) from discontinued operations	$	—		$	—		$	—		$	(0.01	)
Net income	$	1.14		$	0.61		$	2.28		$	1.28
Weighted-average common and common-equivalent shares outstanding:
Basic	86,617			85,460			86,526			85,167
Diluted	89,677			87,346			89,562			86,805
Cash dividends per common share	$	0.085		$	0.075		$	0.245		$	0.22

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

3

COGNEX CORPORATION

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)

	Three-months Ended						Nine-months Ended
	October 1, 2017			October 2, 2016			October 1, 2017			October 2, 2016
	(unaudited)						(unaudited)
Net income	$	102,348		$	53,675		$	204,075		$	111,319
Other comprehensive income (loss), net of tax:
Cash flow hedges:
Net unrealized gain (loss), net of tax of ($8) and $21 in the three-month periods and net of tax of ($5) and ($76) in the nine-month periods, respectively	(4		)	(86		)	(16		)	(965		)
Reclassification of net realized (gain) loss into current operations	(56		)	241			(21		)	427
Net change related to cash flow hedges	(60		)	155			(37		)	(538		)
Available-for-sale investments:
Net unrealized gain (loss), net of tax of $41 and ($29) in the three-month periods and net of tax of $191 and $481 in the nine-month periods, respectively	419			40			1,237			2,672
Reclassification of net realized (gain) loss into current operations	(263		)	(55		)	(370		)	(183		)
Net change related to available-for-sale investments	156			(15		)	867			2,489
Foreign currency translation adjustments:
Foreign currency translation adjustments, net of tax of $0 and $80 in the three-month periods and net of tax of $0 and $254 in the nine-month periods, respectively	5,753			1,125			18,497			3,739
Net change related to foreign currency translation adjustments	5,753			1,125			18,497			3,739
Other comprehensive income (loss), net of tax	5,849			1,265			19,327			5,690
Total comprehensive income	$	108,197		$	54,940		$	223,402		$	117,009

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

4

COGNEX CORPORATION

CONSOLIDATED BALANCE SHEETS

(In thousands)

	October 1, 2017			December 31, 2016
	(unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	111,349		$	79,641
Short-term investments	273,261			341,194
Accounts receivable, less reserves of $1,279 and $873 in 2017 and 2016, respectively	121,976			55,438
Unbilled revenue	51,612			2,217
Inventories	48,061			26,984
Prepaid expenses and other current assets	38,824			20,870
Total current assets	645,083			526,344
Long-term investments	386,501			324,335
Property, plant, and equipment, net	65,957			53,992
Goodwill	113,208			95,280
Intangible assets, net	14,427			8,312
Deferred income taxes	30,524			28,022
Other assets	2,817			2,319
Total assets	$	1,258,517		$	1,038,604
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	30,331		$	9,830
Accrued expenses	53,070			42,539
Accrued income taxes	10,053			5,193
Deferred revenue and customer deposits	16,072			8,211
Total current liabilities	109,526			65,773
Reserve for income taxes	5,563			5,361
Other non-current liabilities	9,905			4,871
Total liabilities	124,994			76,005
Shareholders’ equity:
Common stock, $.002 par value – Authorized: 200,000 shares in 2017 and 2016, respectively, issued and outstanding: 86,587 and 85,939 shares in 2017 and 2016, respectively	173			172
Additional paid-in capital	443,132			375,030
Retained earnings	727,319			643,825
Accumulated other comprehensive loss, net of tax	(37,101		)	(56,428		)
Total shareholders’ equity	1,133,523			962,599
	$	1,258,517		$	1,038,604

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

5

COGNEX CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

	Nine-months Ended
	October 1, 2017			October 2, 2016
	(unaudited)
Cash flows from operating activities:
Net income	$	204,075		$	111,319
Adjustments to reconcile net income to net cash provided by operating activities:
(Gain) loss on sale of discontinued business	—			255
Stock-based compensation expense	23,355			15,883
Depreciation of property, plant, and equipment	9,811			8,551
Amortization of intangible assets	2,539			2,581
Amortization of discounts or premiums on investments	188			288
Realized (gain) loss on sale of investments	(370		)	(733		)
Revaluation of contingent consideration	88			(463		)
Change in deferred income taxes	(1,830		)	(1,415		)
Change in operating assets and liabilities:
Accounts receivable	(58,379		)	(37,802		)
Unbilled revenue	(46,010		)	(9,986		)
Inventories	(18,550		)	10,780
Prepaid expenses and other current assets	(14,968		)	(4,524		)
Accounts payable	19,132			2,089
Accrued expenses	8,819			7,560
Accrued income taxes	3,233			(531		)
Deferred revenue and customer deposits	7,060			4,071
Other	1,861			(1,265		)
Net cash provided by operating activities	140,054			106,658
Cash flows from investing activities:
Purchases of investments	(415,508		)	(598,955		)
Maturities and sales of investments	428,076			529,207
Purchases of property, plant, and equipment	(20,044		)	(10,491		)
Cash paid for acquisition of businesses, net of cash acquired	(24,118		)	(2,483		)
Cash paid related to discontinued business	(291		)	(113		)
Net cash provided by (used in) investing activities	(31,885		)	(82,835		)
Cash flows from financing activities:
Issuance of common stock under stock plans	44,750			23,091
Repurchase of common stock	(99,347		)	(18,941		)
Payment of dividends	(21,236		)	(18,761		)
Payment of contingent consideration	(1,926		)	(337		)
Net cash provided by (used in) financing activities	(77,759		)	(14,948		)
Effect of foreign exchange rate changes on cash and cash equivalents	1,298			295
Net change in cash and cash equivalents	31,708			9,170
Cash and cash equivalents at beginning of period	79,641			51,975
Cash and cash equivalents at end of period	$	111,349		$	61,145

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, 2016	85,939		$	172		$	375,030	$	643,825		$	(56,428	)	$	962,599
Issuance of common stock under stock plans	1,732		3			44,747		—			—			44,750
Repurchase of common stock	(1,084	)	(2		)	—		(99,345		)	—			(99,347		)
Stock-based compensation expense	—		—			23,355		—			—			23,355
Payment of dividends	—		—			—		(21,236		)	—			(21,236		)
Net income	—		—			—		204,075			—			204,075
Net unrealized gain (loss) on cash flow hedges, net of tax of ($5)	—		—			—		—			(16		)	(16		)
Reclassification of net realized (gain) loss on cash flow hedges	—		—			—		—			(21		)	(21		)
Net unrealized gain (loss) on available-for-sale investments, net of tax of $191	—		—			—		—			1,237			1,237
Reclassification of net realized (gain) loss on the sale of available-for-sale investments	—		—			—		—			(370		)	(370		)
Foreign currency translation adjustment, net of tax of $0	—		—			—		—			18,497			18,497
Balance as of October 1, 2017 (unaudited)	86,587		$	173		$	443,132	$	727,319		$	(37,101	)	$	1,133,523

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

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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). Cognex Corporation (the "Company") has provided new disclosures related to inventories and internal-use software 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, 2016 for a full description of 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, including those related to the disposition of a business, necessary to present fairly the Company’s financial position as of October 1, 2017, and the results of its operations for the three-month and nine-month periods ended October 1, 2017 and October 2, 2016, 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 and nine-month periods ended October 1, 2017 are not necessarily indicative of the results to be expected for the full year.

Inventories

On January 1, 2017, the Company adopted Accounting Standards Update (ASU) 2015-11 "Inventory - Simplifying the Measurement of Inventory." This Update requires companies to measure inventory at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. This adoption did not have an impact on the Company's inventory value.

Internal-use Software

The Company accounts for the costs of computer software developed or obtained for internal use under Accounting Standards Codification 350-40 "Intangibles - Goodwill and Other, Internal-use Software." Internal-use software is software acquired, internally developed, or modified solely to meet the entity's internal needs, and during the software's development, no substantive plan exists to sell the software.

The preliminary project stage includes conceptual formulation of design alternatives, determination of system requirements, vendor demonstrations, and final selection of vendors, and during this stage costs are expensed as incurred. The application development stage includes software configuration, coding, hardware installation, and testing. During this stage, certain costs are capitalized, including external direct costs of materials and services, as well as payroll and payroll-related costs for employees who are directly associated with the project, while certain costs are expensed as incurred, including training and data conversion costs. The post-implementation stage includes training and maintenance, and during this stage costs are expensed as incurred.

Capitalization begins when both the preliminary project stage is completed and management commits to funding the project. Capitalization ceases at the point the project is substantially complete and ready for its intended use, that is, after all substantial testing is completed. Costs of specified upgrades and enhancements to internal-use software are capitalized if it is probable that those expenditures result in additional functionality. Capitalized costs are amortized on a straight line basis over the estimated useful life.

NOTE 2: New Pronouncements

Accounting Standards Update (ASU) 2014-09, “Revenue from Contracts with Customers”

The amendments in ASU 2014-09 will supersede and replace all currently existing U.S. GAAP, including industry-specific revenue recognition guidance, with a single, principle-based revenue recognition framework. The concept guiding this new model is that revenue recognition will depict transfer of control to the customer in an amount that reflects consideration to which an entity expects to be entitled. The core principles supporting this framework include (1) identifying the contract with a customer, (2) identifying separate performance obligations within the contract, (3) determining the transaction price, (4) allocating the transaction price to the performance obligations, and (5) recognizing revenue. This new framework will require entities to apply significantly more judgment. This increase in management judgment will require expanded disclosure on estimation methods, inputs, and assumptions for revenue recognition.

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In March 2016, ASU 2016-08, "Principal versus Agent Considerations (Reporting Revenue Gross versus Net)," was issued, in April 2016, ASU 2016-10, "Identifying Performance Obligations and Licensing," was issued, in May 2016, ASU 2016-12, "Narrow-Scope Improvements and Practical Expedients," was issued, and in December 2016, ASU 2016-20, "Technical Corrections and Improvements," was issued. These Updates do not change the core principle of the guidance under ASU 2014-09, but rather provide implementation guidance. ASU 2015-14, "Deferral of the effective date," amended the effective date of ASU 2014-09 for public companies to annual reporting periods beginning after December 15, 2017. Early adoption is permitted, but only beginning after December 15, 2016. The Financial Accounting Standards Board may release additional implementation guidance in future periods.

We expect to adopt this standard using the full retrospective method to present all periods reported on a consistent basis. Upon adoption, revenue for software-only products sold as part of multiple-deliverable arrangements will no longer be deferred when vendor-specific objective evidence of fair value does not exist for undelivered elements of the arrangement. This change will likely result in earlier recognition of revenue. In addition, we expect certain of the Company’s product accessory sales, which are currently reported on a net basis, to be 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 will result 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 will not change. Furthermore, for arrangements that include customer-specified acceptance criteria, we expect to recognize revenue when we 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 will primarily impact revenue recognition for arrangements in the logistics industry where certain customer solutions include installed ID products and will likely result in earlier recognition of revenue. We do not expect these changes to have a material impact on total revenue. As of the date of this report, we have completed a number of implementation activities including the update of the Company's revenue accounting policy, the identification of internal controls under the new standard, the review of a selected number of contracts, and the calculation of transition-period adjustments. We are currently in the process of drafting the disclosures to finalize the implementation of this standard.

Accounting Standards Update (ASU) 2016-01, "Financial Instruments - Recognition and Measurement of Financial Assets and Financial Liabilities"

ASU 2016-01 provides guidance related to certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The amendments in this Update affect all entities that hold financial assets or owe financial liabilities. This ASU requires equity investments (except those accounted under the equity method) to be measured at fair value with changes in fair value recognized in net income. However, an entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment. This ASU also eliminates the requirement for public companies to disclose the methods and significant assumptions used to estimate the fair value for financial instruments measured at amortized cost on the balance sheet, and it requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements. For public companies, the guidance in ASU 2016-01 is effective for annual periods beginning after December 15, 2017, and interim periods within those annual periods. Early adoption is not permitted except for certain amendments in this Update. Management does not expect ASU 2016-01 to have a material impact on the Company's financial statements and disclosures.

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 evaluating the impact of this Update.

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,

9

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) 2016-16, "Income Taxes - Intra-Entity Transfers of Assets Other than Inventory"

ASU 2016-16 applies to all reporting entities with intra-entity transfers of assets other than inventory. The amendments in this Update allow the recognition of deferred income taxes for an intra-entity transfer of an asset other than inventory when the transfer occurs, as opposed to when the asset has been sold to an outside party under current U.S. GAAP. Two common examples of assets included in the scope of this Update are intellectual property and property, plant, and equipment. For public companies, the amendments in ASU 2016-16 are effective for annual reporting periods beginning after December 15, 2017, and interim reporting periods within those annual periods. Early adoption is permitted for all entities as of the beginning of an annual reporting period for which financial statements (interim or annual) have not been issued or made available for issuance. 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. Management does not expect ASU 2016-16 to have a material impact on the Company's financial statements and disclosures.

Accounting Standards Update (ASU) 2017-01, "Business Combinations - Clarifying the Definition of a Business"

ASU 2017-01 applies to all reporting entities that must determine whether they have acquired or sold a business. The amendments in this Update clarify the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. For public companies, the amendments in ASU 2017-01 are effective for annual reporting periods beginning after December 15, 2017, and interim reporting periods within those annual periods. This ASU should be applied prospectively on or after the effective date and no disclosures are required at transition. Early adoption is permitted for transactions for which the acquisition date occurs before the issuance date or the effective date of the amendments in this Update, only when the transaction has not been reported in financial statements that have been issued. Management does not expect ASU 2017-01 to have a material impact on the Company's financial statements and disclosures.

Accounting Standards Update (ASU) 2017-04, "Intangibles - Goodwill and Other - Simplifying the Test for Goodwill Impairment"

ASU 2017-04 applies to all reporting entities that have goodwill reported in their financial statements. The amendments in this Update eliminate Step 2 from the goodwill impairment test reducing the cost and complexity of evaluating goodwill for impairment. In computing the implied fair value of goodwill under Step 2, an entity had to perform procedures to determine the fair value at the impairment date of its assets and liabilities as would be required in a business combination. Instead, under the amendments in this Update, an entity should perform its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value. For public companies, the amendments in ASU 2017-04 are effective for the annual or any interim goodwill impairment tests for reporting periods beginning after December 15, 2019. This ASU should be applied prospectively and an entity is required to disclose the nature of and reason for the change in accounting principle upon transition. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Management does not expect ASU 2017-04 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

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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 is in the process of evaluating the impact of this Update.

Accounting Standards Update (ASU) 2017-09, "Compensation - Stock Compensation - Scope of Modification Accounting"

ASU 2017-09 applies to all reporting entities that change the terms or conditions of a share-based payment award. Currently, the definition of the term modification is broad and its interpretation results in diversity in practice. The amendments in this Update provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. An entity should account for the effects of a modification unless all the following are met: 1) the fair value of the modified award is the same as the fair value of the original award immediately before the original award is modified, 2) the vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified, and 3) the classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. For public companies, the amendments in ASU 2017-09 are effective for annual reporting periods beginning after December 15, 2017, and interim reporting periods within those annual periods. Early adoption is permitted including adoption in an interim period, for reporting periods for which financial statements have not yet been issued. This ASU should be applied prospectively to an award modified on or after the adoption date. Management does not expect ASU 2017-09 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 is in the process of evaluating the impact of this Update.

11

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

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 October 1, 2017 (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	$	6,700	$	—	$	—
Corporate bonds	—		311,509		—
Treasury bills	—		133,786		—
Asset-backed securities	—		106,909		—
Euro liquidity fund	—		52,312		—
Sovereign bonds	—		28,971		—
Agency bonds	—		13,245		—
Municipal bonds	—		13,030		—
Economic hedge forward contracts	—		13		—
Liabilities:
Economic hedge forward contracts	—		13		—
Contingent consideration liabilities	—		—		3,673

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 nine-month period ended October 1, 2017.

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.

12

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The following table summarizes the activity for the Company's liability measured at fair value using Level 3 inputs for the nine-month period ended October 1, 2017 (in thousands):

Balance as of December 31, 2016	$	4,173
Payment of EnShape contingent consideration	(1,401		)
Payment of Manatee contingent consideration	(525		)
Contingent consideration resulting from GVi acquisition	1,299
Fair value adjustment to Manatee contingent consideration	(275		)
Fair value adjustment to Chiaro contingent consideration	185
Fair value adjustment to GVi contingent consideration	178
Foreign exchange rate changes	39
Balance as of October 1, 2017	$	3,673

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 nine-month period ended October 1, 2017.

NOTE 4: Cash, Cash Equivalents, and Investments

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

	October 1, 2017		December 31, 2016
Cash	$	104,649	$	77,307
Money market instruments	6,700		2,334
Cash and cash equivalents	111,349		79,641
Treasury bills	70,184		67,175
Corporate bonds	65,569		141,188
Euro liquidity fund	52,312		46,499
Asset-backed securities	47,840		69,614
Sovereign bonds	20,945		7,298
Municipal bonds	8,805		6,517
Agency bonds	7,606		2,903
Short-term investments	273,261		341,194
Corporate bonds	245,940		169,952
Treasury bills	63,602		92,280
Asset-backed securities	59,069		26,946
Sovereign bonds	8,026		23,585
Agency bonds	5,639		10,339
Municipal bonds	4,225		1,233
Long-term investments	386,501		324,335
	$	771,111	$	745,170

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; the Euro liquidity fund invests in a portfolio of investment-grade bonds; asset-backed securities consist of debt securities collateralized by pools of receivables or loans with credit enhancement; sovereign bonds consist of direct debt issued by foreign governments; municipal bonds consist of debt securities issued by state and local government entities; and agency bonds consist of domestic or foreign obligations of government agencies and government sponsored enterprises that have government backing. The Euro liquidity fund is denominated in Euros, and the remaining securities are denominated in U.S. Dollars.

13

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The following table summarizes the Company’s available-for-sale investments as of October 1, 2017 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Treasury bills	$	70,311	$	—	$	(127	)	70,184
Corporate bonds	65,484		91		(6		)	65,569
Euro liquidity fund	51,929		383		—			52,312
Asset-backed securities	47,839		13		(12		)	47,840
Sovereign bonds	20,974		5		(34		)	20,945
Municipal bonds	8,805		—		—			8,805
Agency bonds	7,600		6		—			7,606
Long-term:
Corporate bonds	245,046		1,013		(119		)	245,940
Treasury bills	63,704		—		(102		)	63,602
Asset-backed securities	59,038		76		(45		)	59,069
Sovereign bonds	8,059		7		(40		)	8,026
Agency bonds	5,630		9		—			5,639
Municipal bonds	4,219		9		(3		)	4,225
	$	658,638	$	1,612	$	(488	)	$	659,762

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 October 1, 2017 (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
Treasury bills	$	95,174	$	(150	)	$	33,627	$	(79	)	$	128,801	$	(229	)
Asset-backed securities	51,878		(55		)	8,770		(2		)	60,648		(57		)
Corporate bonds	20,106		(33		)	15,154		(92		)	35,260		(125		)
Sovereign bonds	2,495		(5		)	19,854		(69		)	22,349		(74		)
Municipal bonds	1,356		(3		)	—		—			1,356		(3		)
	$	171,009	$	(246	)	$	77,405	$	(242	)	$	248,414	$	(488	)

As of October 1, 2017, 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 $306,000 and $43,000, respectively, during the three-month period ended October 1, 2017 and $55,000 and $0, respectively, during the three-month period ended October 2, 2016. The Company recorded gross realized gains and gross realized losses on the sale of debt securities totaling $449,000 and $79,000, respectively, during the nine-month period ended October 1, 2017 and $280,000 and $97,000, respectively, during the nine-month period ended October 2, 2016. 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).

14

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 October 1, 2017 (in thousands):

	<1 year		1-2 Years		2-3 Years		3-4 Years		4-5 Years		5-7 Years		Total
Corporate bonds	$	65,569	$	109,918	$	77,430	$	17,223	$	39,956	$	1,413	$	311,509
Treasury bills	70,184		63,602		—		—		—		—		133,786
Asset-backed securities	47,840		35,502		16,075		—		2,328		5,164		106,909
Euro liquidity fund	52,312		—		—		—		—		—		52,312
Sovereign bonds	20,945		4,599		3,427		—		—		—		28,971
Agency bonds	7,606		2,719		—		—		2,920		—		13,245
Municipal bonds	8,805		2,869		1,356		—		—		—		13,030
	$	273,261	$	219,209	$	98,288	$	17,223	$	45,204	$	6,577	$	659,762

NOTE 5: Inventories

Inventories consisted of the following (in thousands):

	October 1, 2017		December 31, 2016
Raw materials	$	23,146	$	18,224
Work-in-process	1,631		2,760
Finished goods	23,284		6,000
	$	48,061	$	26,984

NOTE 6: Goodwill

The changes in the carrying value of goodwill were as follows (in thousands):

	Amount
Balance as of December 31, 2016	$	95,280
Acquisition of ViDi Systems S.A.	18,333
Acquisition of GVi Ventures, Inc.	1,476
Adjustment to EnShape goodwill	(1,881		)
Balance as of October 1, 2017	$	113,208

Refer to Note 15 to the Consolidated Financial Statements for further information regarding acquisitions.

NOTE 7:  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		3,571		10,116
Customer relationships	9,205		5,203		4,002
Non-compete agreements	370		61		309
Balance as of October 1, 2017	$	61,322	$	46,895	$	14,427
	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Distribution networks	$	38,060	$	37,422	$	638
Completed technologies	8,003		2,098		5,905
Customer relationships	6,605		4,836		1,769
Balance as of December 31, 2016	$	52,668	$	44,356	$	8,312

15

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

As of October 1, 2017, estimated future amortization expense related to intangible assets is as follows (in thousands):

Year Ended December 31,	Amount
Remainder of fiscal 2017	$	799
2018	3,196
2019	2,821
2020	2,305
2021	2,097
2022	1,691
Thereafter	1,518
	$	14,427

NOTE 8: 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, 2016	$	4,335
Provisions for warranties issued during the period	2,322
Fulfillment of warranty obligations	(2,323		)
Foreign exchange rate changes	545
Balance as of October 1, 2017	$	4,879

NOTE 9: 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 our budgeted revenues and expenses against foreign currency exchange rate changes compared to our budgeted rates. These cash flow hedges are designated as hedging instruments for hedge accounting treatment.

16

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

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

	October 1, 2017			December 31, 2016
Currency	Notional Value	USD Equivalent		Notional Value	USD Equivalent
Derivatives Designated as Hedging Instruments:
Japanese Yen	—	$	—	342,500	$	2,960
Hungarian Forint	—	—		39,000	130
Singapore Dollar	—	—		150	97
Derivatives Not Designated as Hedging Instruments:
Japanese Yen	500,000	$	4,440	650,000	$	5,554
British Pound	1,720	2,294		1,350	1,658
Hungarian Forint	530,000	2,014		425,000	1,448
Korean Won	1,325,000	1,154		1,750,000	1,450
Singapore Dollar	—	—		1,350	929
Taiwanese Dollar	34,640	1,139		26,000	802
Swiss Franc	1,025	1,059		—	—

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	October 1, 2017		December 31, 2016		Sheet Location	October 1, 2017		December 31, 2016
Derivatives Designated as Hedging Instruments:
Cash flow hedge forward contracts	Prepaid expenses and other current assets	$	—	$	43	Accrued expenses	$	—	$	—
Derivatives Not Designated as Hedging Instruments:
Economic hedge forward contracts	Prepaid expenses and other current assets	$	13	$	1	Accrued expenses	$	13	$	11

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
	October 1, 2017		December 31, 2016				October 1, 2017		December 31, 2016
Gross amounts of recognized assets	$	13	$	117		Gross amounts of recognized liabilities	$	13	$	11
Gross amounts offset	—		(73		)	Gross amounts offset	—		—
Net amount of assets presented	$	13	$	44		Net amount of liabilities presented	$	13	$	11

17

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

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

	Location in Financial Statements	Three-months Ended					Nine-months Ended
		October 1, 2017		October 2, 2016			October 1, 2017		October 2, 2016
Derivatives Designated as Hedging Instruments:
Gains (losses) recorded in shareholders' equity (effective portion)	Accumulated other comprehensive income (loss), net of tax	$	—	$	(332	)	$	—	$	(332	)
Gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations (effective portion)	Revenue	$	56	$	(250	)	$	10	$	(453	)
	Research, development, and engineering expenses	—		1			3		5
	Selling, general, and administrative expenses	—		8			8		21
	Total gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations	$	56	$	(241	)	$	21	$	(427	)
Derivatives Not Designated as Hedging Instruments:
Gains (losses) recognized in current operations	Foreign currency gain (loss)	$	43	$	(24	)	$	139	$	(1,089	)

The following table provides the changes in accumulated other comprehensive income (loss), net of tax, related to derivative instruments (in thousands):

Balance as of December 31, 2016	$	37
Net unrealized loss on cash flow hedges	(16		)
Reclassification of net realized gain on cash flow hedges into current operations	(21		)
Balance as of October 1, 2017	$	—

Net gains expected to be reclassified from accumulated other comprehensive income (loss), net of tax, into current operations within the next twelve months are $0.

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 October 1, 2017, the Company had 6,183,376 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 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 generally be at least one year and three years, respectively, but vesting may occur incrementally over the three-year period.

18

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The following table summarizes the Company’s stock option activity for the nine-month period ended October 1, 2017:

	Shares (in thousands)		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2016	6,433		$	32.16
Granted	1,980		77.87
Exercised	(1,731	)	25.85
Forfeited or expired	(84	)	45.57
Outstanding as of October 1, 2017	6,598		$	47.36	7.77	$	415,030
Exercisable as of October 1, 2017	1,707		$	27.96	5.68	$	140,559
Options vested or expected to vest as of October 1, 2017 (1)	5,795		$	45.86	7.63	$	373,276

 (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				Nine-months Ended
	October 1, 2017		October 2, 2016		October 1, 2017		October 2, 2016
Risk-free rate	2.4	%	1.7	%	2.4	%	1.7	%
Expected dividend yield	0.39	%	0.84	%	0.39	%	0.84	%
Expected volatility	41	%	41	%	41	%	41	%
Expected term (in years)	5.1		5.5		5.3		5.5

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 expects that approximately 75% of its stock options granted to senior management and 72% of its options granted to all other employees will actually vest. Therefore, the Company currently applies an estimated annual forfeiture rate of 10% to all unvested options for senior management and a rate of 12% for all other employees. The Company revised its estimated forfeiture rate in the first quarter of 2017, resulting in a decrease to compensation expense of $673,000. The Company also revised its estimated forfeiture rate in the first quarter of 2016, resulting in an increase to compensation expense of $334,000.

The weighted-average grant-date fair values of stock options granted during the three-month periods ended October 1, 2017 and October 2, 2016 were $29.59 and $12.34, respectively. The weighted-average grant-date fair values of stock

19

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

options granted during the nine-month periods ended October 1, 2017 and October 2, 2016 were $29.94 and $12.25, respectively.

The total intrinsic values of stock options exercised for the three-month periods ended October 1, 2017 and October 2, 2016 were $28,462,000 and $23,139,000, respectively. The total intrinsic values of stock options exercised for the nine-month periods ended October 1, 2017 and October 2, 2016 were $100,913,000 and $32,514,000, respectively. The total fair values of stock options vested for the three-month periods ended October 1, 2017 and October 2, 2016 were $844,000 and $679,000, respectively. The total fair values of stock options vested for the nine-month periods ended October 1, 2017 and October 2, 2016 were $19,557,000 and $16,724,000, respectively.

As of October 1, 2017, total unrecognized compensation expense related to non-vested stock options was $41,354,000, which is expected to be recognized over a weighted-average period of 1.67 years.

The following table summarizes the Company's restricted stock activity for the nine-month period ended October 1, 2017:

	Shares (in thousands)		Weighted-Average Grant Fair Value		Aggregate Intrinsic Value (in thousands)(1)
Nonvested as of December 31, 2016	20		$	34.05
Granted	—		—
Vested	(10	)	34.05		825
Forfeited or expired	—		—
Nonvested as of October 1, 2017	10		$	34.05	$	1,103

(1) Fair market value as of April 22, 2017 for vested shares, and as of October 1, 2017 for nonvested shares.

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 October 1, 2017 were $8,026,000 and $2,639,000, respectively, and for the three-month period ended October 2, 2016 were $4,622,000 and $1,520,000, respectively. The total stock-based compensation expense and the related income tax benefit recognized for the nine-month period ended October 1, 2017 were $23,355,000 and $7,661,000, respectively, and for the nine-month period ended October 2, 2016 were $15,883,000 and $5,210,000, respectively. No compensation expense was capitalized as of October 1, 2017 or December 31, 2016.

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				Nine-months Ended
	October 1, 2017		October 2, 2016		October 1, 2017		October 2, 2016
Cost of revenue	$	520	$	273	$	1,404	$	795
Research, development, and engineering	2,765		1,366		8,090		4,942
Selling, general, and administrative	4,741		2,983		13,861		10,146
	$	8,026	$	4,622	$	23,355	$	15,883

20

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 11: Stock Repurchase Program

In November 2015, the Company's Board of Directors authorized the repurchase of $100,000,000 of the Company's common stock. As of October 1, 2017, the Company had repurchased 1,335,000 shares at a cost of $100,000,000 under this program, including 796,000 shares at a cost of $68,915,000 for the nine-month period ended October 1, 2017. In April 2017, the Company's Board of Directors authorized the repurchase of an additional $100,000,000 of the Company's common stock. Purchases under this April 2017 program commenced during the third quarter of 2017. As of October 1, 2017, the Company had repurchased 288,000 shares at a cost of $30,432,000 under this program. 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 on continuing operations, or effective tax rate, was as follows:

	Three-months Ended				Nine-months Ended
	October 1, 2017		October 2, 2016		October 1, 2017		October 2, 2016
Income tax provision at federal statutory corporate tax rate	35	%	35	%	35	%	35	%
State income taxes, net of federal benefit	1	%	1	%	1	%	1	%
Foreign tax rate differential	(18	)%	(17	)%	(18	)%	(17	)%
Tax credit	(1	)%	(1	)%	(1	)%	(1	)%
Discrete tax benefit related to stock option exercises	(7	)%	(11	)%	(13	)%	(6	)%
Other discrete tax events	(2	)%	(2	)%	(1	)%	(1	)%
Other	1	%	—	%	1	%	—	%
Income tax provision on continuing operations	9	%	5	%	4	%	11	%

The majority of income earned outside of the United States is permanently 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 35%. 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. These differences resulted in a decrease in the effective tax rate by 18 percentage pointsfor the three-month and nine-month periods ended October 1, 2017, and a decrease in the effective tax rate by 17% percentage points for the three-month and nine-month periods ended October 2, 2016.

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 7 and 11 percentage points for the three-month periods ended October 1, 2017 and October 2, 2016, respectively, and a decrease of the effective tax rate by 13 and 6 percentage points for the nine-month periods ended October 1, 2017 and October 2, 2016, respectively.

During the nine-month period ended October 1, 2017, the Company recorded a $201,000 increase in reserves for income taxes, net of deferred tax benefit. Estimated interest and penalties included in these amounts totaled $22,000 for the nine-month period ended October 1, 2017.

The Company’s reserve for income taxes, including gross interest and penalties, was $6,591,000 as of October 1, 2017, which included $5,563,000 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 $701,000. 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 $1,000,000 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 2016 remain open to examination by

21

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

the Internal Revenue Service and various state tax authorities. The tax years 2013 through 2016 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		Nine-months Ended
	October 1, 2017	October 2, 2016	October 1, 2017	October 2, 2016
Basic weighted-average common shares outstanding	86,617	85,460	86,526	85,167
Effect of dilutive stock options	3,060	1,886	3,036	1,638
Weighted-average common and common-equivalent shares outstanding	89,677	87,346	89,562	86,805

Stock options to purchase 233,081 and 1,554,129 shares of common stock, on a weighted-average basis, were outstanding during the three-month and nine-month periods ended October 1, 2017, respectively, and 491,375 and 3,641,279 for the same periods in 2016, but were not included in the calculation of dilutive net income per share because they were anti-dilutive.

NOTE 14: Discontinued Operations

On July 6, 2015, the Company completed the sale of its Surface Inspection Systems Division (SISD). A binding arbitration was concluded in the second quarter of 2016 with respect to certain product performance claims made by an SISD customer, for which the Company remained responsible under the indemnity provisions of the sale transaction. In that proceeding, the tribunal ordered the Company to pay the customer approximately $326,000, primarily representing a refund of the product purchase price. The tribunal also ordered the customer to pay the Company approximately $45,000, primarily representing reimbursement of legal fees. The net settlement of $281,000 was recorded in discontinued operations in the second quarter of 2016, along with $123,000 of legal fees. The tax benefit related to this expense was $149,000, resulting in a net loss from discontinued operations of $255,000.

The losses included in discontinued operations were as follows (in thousands):

	Three-months Ended				Nine-months Ended
	October 1, 2017		October 2, 2016		October 1, 2017		October 2, 2016
Operating income from discontinued operations	$	—	$	—	$	—	$	—
Gain (loss) on sale of discontinued operations	—		—		—		(404		)
Income (loss) from discontinued operations before income tax expense (benefit)	—		—		—		(404		)
Income tax expense (benefit) on discontinued operations	—		—		—		(149		)
Net income (loss) from discontinued operations	$	—	$	—	$	—	$	(255	)

NOTE 15: Acquisitions

ViDi Systems S.A.

On April 4, 2017, the Company acquired all of the outstanding shares of ViDi Systems, S.A. (ViDi), a privately-held vision software company based in Switzerland. This transaction has been accounted for as a business combination.

The total purchase price of $23,015,000 included cash payment of $20,019,000, with the remaining $2,996,000 recorded as a holdback to secure potential claims under the agreement. The holdback limitation period is 18 months, and therefore, this amount has been recorded in "Other non-current liabilities" on the Consolidated Balance Sheet. In addition, the Company entered into a special incentive payment tied to employment, which is not material, that the Company will record as compensation expense.

22

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

Under this transaction, in addition to completed technologies, the Company acquired a team of software engineers that are expected to help the Company broaden the scope of applications that can be addressed with Cognex vision. ViDi's deep learning software uses artificial intelligence techniques to improve image analysis in applications where it is difficult to predict the full range of image variations that might be encountered. Using feedback, ViDi's software trains the system to distinguish between acceptable variations and defects. Assets acquired and liabilities assumed have been recorded at their estimated fair values as of the acquisition date.

The purchase price was allocated as follows (in thousands):

Cash	$	146
Accounts receivable	425
Prepaid expenses and other current assets	129
Property, plant, and equipment	40
Deferred income tax asset	620
Accounts payable	(98		)
Accrued expenses	(716		)
Deferred income tax liability	(1,008		)
Non-compete agreement	370
Completed technologies	4,774
Goodwill	18,333
Purchase price	$	23,015

The non-compete agreement and completed technology are included in "Intangible assets" on the Consolidated Balance Sheet. The non-compete agreement will be amortized to research, development and engineering expenses over three years, and the completed technology will be amortized to cost of revenue over six years, both on a straight-line basis. The portion of the acquired goodwill deductible for tax purposes is $5,112,000.Transaction costs were immaterial and were expensed as incurred.

GVi Ventures, Inc.

On April 12, 2017, the Company acquired selected assets and assumed selected liabilities of GVi Ventures, Inc., a privately-held maker of pre-configured vision solutions for common automotive applications based in the United States. This transaction has been accounted for as a business combination.

The total purchase price of $5,368,000 included cash payment of $4,069,000 and contingent consideration valued at $1,299,000 as of the acquisition date. In addition, the Company entered into special incentive payments tied to employment, none of which are material, that the Company will record as compensation expense.

The undiscounted potential outcomes related to the contingent consideration range from $0 to $3,500,000 based upon certain milestone revenue levels over the next five years. As of October 1, 2017, the fair value of the contingent consideration was $1,477,000, with $311,000 recorded in “Accrued expenses,” and $1,166,000 recorded in "Other non-current liabilities" on the Consolidated Balance Sheet. The contingent consideration is remeasured each reporting period with changes in fair value recorded in "Other income (expense)" on the Consolidated Statements of Operations.

Under this transaction, in addition to customer relationships and completed technologies, the Company acquired a team of software engineers that are expected to develop new products and increase the Company's ability to serve large customers in the automotive industry. Assets acquired and liabilities assumed have been recorded at their estimated fair values as of the acquisition date.

23

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The purchase price was allocated as follows (in thousands):

Accounts receivable	$	423
Inventories	120
Prepaid expenses and other current assets	1
Accounts payable	(152		)
Accrued expenses	(10		)
Completed technologies	910
Customer relationships	2,600
Goodwill	1,476
Purchase price	$	5,368

The customer relationships and completed technologies are included in "Intangible assets" on the Consolidated Balance Sheet. The customer relationships are being amortized to selling, general, and administrative expenses overeightyears, and the completed technologies are being amortized to cost of revenue overfiveyears, both on a straight-line basis. A portion of the acquired goodwill is deductible for tax purposes. Transaction costs were immaterial and were expensed as incurred.

Pro-forma information for these acquisitions has not been presented because they are not material, either individually or in the aggregate.

NOTE 16: Subsequent Events

On October 30, 2017, the Company’s Board of Directors declared a cash dividend of $0.09 per share. The dividend is payable December 1, 2017 to all shareholders of record as of the close of business on November 17, 2017.

In addition, on October 30, 2017, the Company's Board of Directors declared a two-for-one split of the Company's common stock. The split will be effected in the form of a stock dividend, payable on December 1, 2017 to all shareholders of record as of the close of business on November 17, 2017.

24

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, the timing for recognition of revenue, expected areas of growth, emerging markets, future product mix, research and development activities, the impact of acquisitions, the Company’s new Enterprise Resource Planning (ERP) system, 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 reliance upon key suppliers to manufacture and deliver critical components for our products; (10) the failure to effectively manage product transitions or accurately forecast customer demand; (11) the inability to design and manufacture high-quality products; (12) the technological obsolescence of current products and the inability to develop new products; (13) the failure to properly manage the distribution of products and services; (14) the inability to protect our proprietary technology and intellectual property; (15) our involvement in time-consuming and costly litigation; (16) the impact of competitive pressures; (17) the challenges in integrating and achieving expected results from acquired businesses; (18) potential impairment charges with respect to our investments or for acquired intangible assets or goodwill; and (19) 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, 2016. 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. Virtually every manufacturer 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.

Revenue for the nine-month period ended October 1, 2017 totaled $567,585,000, representing an increase of $176,154,000, or 45%, from same period in 2016 driven primarily by strong sales in the consumer electronics, logistics, and automotive industries. The gross margin remained consistent at 77% of revenue for both periods. Operating expenses increased by $50,364,000, or 28%, from the nine-month period in 2016 due principally to higher personnel-related costs and incentive compensation plan expenses. The significant increase in revenue resulted in an operating income margin of 37% of revenue for the nine-month period in 2017 compared to 31% of revenue for the nine-month

25

period in 2016. Substantial tax benefits related to stock option exercises further contributed to a net income margin of 36% of revenue for the nine-month period in 2017 compared to 29% of revenue for the nine-month period in 2016. Net income from continuing operations per diluted share was $2.28 for the nine-month period in 2017 compared to $1.29 for the nine-month period in 2016.

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 increased by $111,787,000, or 76%, for the three-month period and increased by $176,154,000, or 45%, for the nine-month period ended October 1, 2017. Changes in foreign currency exchange rates did not have a material impact on revenue. The significant increase for the three-month period was driven by the timing of large customer orders in the consumer electronics industry. In 2017, more of these large orders were recognized as revenue in the third quarter of 2017, while revenue from large orders in this industry was more evenly split between the second and third quarters in 2016. The future quarterly timing of revenue in the consumer electronics industry will depend upon a number of factors, including the product introduction cycles of our large customers in this industry. Revenue for the nine-month period, which was not impacted by this quarterly timing, increased by 30% in the Americas, increased by 36% in Europe, and increased by 80% in Asia. This growth resulted primarily from strong sales in the consumer electronics, logistics, and automotive industries.

Gross Margin

Gross margin as a percentage of revenue was 76% and 77% for the three-month and nine-month periods in 2017, respectively, compared to 78% and 77% for the same periods in 2016. The decrease for the three-month period was due primarily to higher revenue from a material customer in the consumer electronics industry under a preferred pricing arrangement.

Operating Expenses

Research, Development, and Engineering Expenses

Research, Development, and Engineering Expenses increased by $7,475,000, or 40%, for the three-month period and increased by $13,396,000, or 23%, for the nine-month period as detailed in the table below (in thousands).

	Three-month period		Nine-month period
RD&E expense in 2016	$	18,603	$	58,829
Personnel-related costs	2,662		6,381
Stock-based compensation expense	1,390		3,150
Other	3,423		3,865
RD&E expenses in 2017	$	26,078	$	72,225

RD&E expenses increased due to higher personnel-related costs resulting primarily from headcount additions to support new product initiatives and the higher level of business. These headcount additions included engineering talent from six business acquisitions completed since August 2016 that are expected to help accelerate the development of future products. Stock-based compensation expense was also higher than the prior year due to a higher valuation of stock options issued as part of the Company's annual grant during the first quarter of 2017.

RD&E expenses as a percentage of revenue were 10% and 13% for the three-month and nine-month periods in 2017, respectively, compared to 13% and 15% for the same periods in 2016. 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

26

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 $18,982,000, or 45%, for the three-month period and increased by $36,968,000, or 30%, for the nine-month period as detailed in the table below (in thousands).

	Three-month period		Nine-month period
SG&A expenses in 2016	$	42,072	$	123,125
Personnel-related costs	5,422		11,491
Incentive compensation plans	4,362		8,411
Travel expenses	1,618		3,812
Stock-based compensation expense	1,735		3,724
ERP outside services	945		2,499
Sales demonstration equipment	1,666		2,220
Other	3,234		4,811
SG&A expenses in 2017	$	61,054	$	160,093

SG&A expenses increased due to higher personnel-related costs resulting primarily from headcount additions, principally sales personnel. In addition, higher incentive compensation plan expenses, including sales commission and bonus plans, were recorded in 2017 as a result of the additional headcount and higher achievement levels based upon the Company's performance. Travel expenses and sales demonstration equipment were also higher than the prior year due to the additional sales personnel and the higher business level. Stock-based compensation expense was higher than the prior year due to a higher valuation of stock options issued as part of the Company's annual grant during the first quarter of 2017.

In 2017, the Company incurred costs for outside services related to the preliminary project and application development stages for a new Enterprise Resource Planning (ERP) system, which is the management information system that integrates the Company's manufacturing, order fulfillment, and financial activities. Although expenses will continue to be incurred for the remainder of 2017, we expect a large portion of these costs to be capitalized as part of the application development of the new ERP system, which we expect to place into service in the first half of 2018.

Non-operating Income (Expense)

The Company recorded foreign currency losses of $127,000 and $574,000 for the three-month and nine-month periods in 2017, respectively, compared to foreign currency losses of $607,000 and $377,000 for the same periods in 2016. 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 $428,000, or 21%, for the three-month period and increased by $1,994,000, or 43%, for the nine-month period. The increase was due to higher yields, as well as additional funds available for investment in the Company's portfolio of debt securities.

The Company recorded other expense of $445,000 and $344,000 for the three-month and nine-month periods in 2017, respectively, compared to other income of $374,000 and $803,000 for the same periods in 2016. Other income (expense) included an expense of $239,000 and $88,000 for the three-month and nine-month periods in 2017, respectively, and a benefit of $463,000 for the nine-month period in 2016 resulting from the revaluation of contingent consideration liabilities arising from business combinations. In addition, the Company received a foreign government subsidy in the amount of $422,000 that was recorded as other income in the third quarter of 2016. Other income (expense) also included rental income, net of associated expenses, from leasing space in buildings adjacent to the Company’s corporate headquarters. The Company expects to occupy more of the space for its own business operations in the future, which will result in a continued decline in non-operating rental income.

Income Tax Expense

The Company’s effective tax rate was an expense of 9% and 4% of pre-tax income for the three-month and nine-month periods in 2017, respectively, compared to an expense of 5% and 11% of pre-tax income for the same periods in 2016.

The effective tax rate included a decrease in tax expense of $8,620,000 and $27,574,000 for the three-month and nine-month periods in 2017, respectively, and $6,038,000 and $7,246,000 in the same periods in 2016 from the excess tax benefit arising from the difference between the deduction for tax purposes and the compensation cost recognized

27

for financial reporting purposes from stock option exercises. The Company cannot predict the level of stock option exercises by employees in future periods. In addition, the effective tax rate included a decrease in tax expense of $1,765,000 and $1,908,000 for the three-month and nine-month periods in 2017, respectively, and $1,436,000 and $1,332,000 in the same periods in 2016 from other discrete tax events, consisting primarily of the final true-up of the prior year's tax accrual upon filing the actual tax returns and the expiration of the statutes of limitations for certain reserves for income tax uncertainties.

Excluding the impact of these discrete tax events, the Company’s effective tax rate was 18% for all periods presented. The majority of income earned outside of the United States is permanently 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, compared to the U.S. federal statutory corporate tax rate of 35%. 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.

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 $771,111,000 as of October 1, 2017. 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 nine-month period ended October 1, 2017 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, cash paid for business acquisitions, and capital expenditures. Significant operating cash outflows included working capital requirements to support the higher business level. Capital expenditures for the nine-month period totaled $20,044,000 and consisted primarily of computer hardware and software (including the ERP system referred to in the subsequent paragraph), manufacturing test equipment related to new product introductions, and improvements made to the Company's headquarters building in Natick, Massachusetts and the Company's distribution center in Cork, Ireland.

During the nine-month period ended October 1, 2017, cash outflows related to the preliminary project and application development activities for a new Enterprise Resource Planning (ERP) system totaled $6,781,000, consisting of $2,499,000 of external direct costs for outside services and $1,312,000 of internal personnel-related costs for employees assigned to this project, both of which were expensed, and $2,970,000 of capital expenditures. As of the date of this report, the Company expects cash outflows related to this project to be approximately $4,000,000 in the fourth quarter of 2017, with a large portion of these costs to be capitalized as part of the new system, which the Company expects to place into service in the first half of 2018.

In November 2015, the Company's Board of Directors authorized the repurchase of $100,000,000 of the Company's common stock. As of October 1, 2017, the Company had repurchased 1,335,000 shares at a cost of $100,000,000 under this program, including 796,000 shares at a cost of $68,915,000 for the nine-month period ended October 1, 2017. In April 2017, the Board authorized the repurchase of an additional $100,000,000 of the Company's common stock. Purchases under this April 2017 program commenced during the third quarter of 2017. As of October 1, 2017, the Company had repurchased 288,000 shares at a cost of $30,432,000 under this program. 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.

The Company’s Board of Directors declared and paid a cash dividend of $0.075 per share in the first quarter of 2017, $0.085 per share in the second quarter of 2017, and $0.085 per share in the third quarter of 2017, totaling $21,236,000 for the nine-month period ended October 1, 2017. 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 position 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.

28

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 October 1, 2017, the Company had $771,111,000 in cash and investments. In addition, the Company has no debt and does not 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, 2016.

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 October 1, 2017 that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

29

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, 2016.

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 October 1, 2017:

	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
July 3 - July 30, 2017	—	$	—	—	$	106,572,000
July 31 - August 27, 2017	165,000	102.40		165,000	89,677,000
August 28 - October 1, 2017	187,000	107.53		187,000	69,568,000
Total	352,000	$	105.13	352,000	$	69,568,000

(1) In November 2015, the Company's Board of Directors authorized the repurchase of $100,000,000 of the Company's common stock. Purchases under this program commenced in the third quarter of 2016. In April 2017, the Company's Board of Directors authorized the repurchase of an additional $100,000,000 of the Company's common stock. Purchases under this program commenced once the November 2015 program was completed in the third quarter of 2017.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

None.

30

ITEM 6. EXHIBITS

Exhibit Number
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 October 1, 2017, formatted in xBRL: (i) Consolidated Statements of Operations for the three-month and nine-month periods ended October 1, 2017 and October 2, 2016; (ii) Consolidated Statements of Comprehensive Income for the three-month and nine-month periods ended October 1, 2017 and October 2, 2016; (iii) Consolidated Balance Sheets as of October 1, 2017 and December 31, 2016; (iv) Consolidated Statements of Cash Flows for the nine-month periods ended October 1, 2017 and October 2, 2016; (v) Consolidated Statement of Shareholders’ Equity for the nine-month period ended October 1, 2017; and (vi) Notes to Consolidated Financial Statements.
*	Filed herewith
**	Furnished herewith

31

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:	October 30, 2017	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)

32

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:	October 30, 2017	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:	October 30, 2017	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 October 1, 2017 (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:	October 30, 2017	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 October 1, 2017 (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:	October 30, 2017	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.

XML

Document and Entity Information	9 Months Ended
	Oct. 01, 2017 shares
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	Oct. 01, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding	86,586,599

XML

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Income Statement [Abstract]
Revenue	$ 259,739	$ 147,952	$ 567,585	$ 391,431
Cost of revenue	62,360	32,749	128,056	88,930
Gross margin	197,379	115,203	439,529	302,501
Research, development, and engineering expenses	26,078	18,603	72,225	58,829
Selling, general, and administrative expenses	61,054	42,072	160,093	123,125
Operating income	110,247	54,528	207,211	120,547
Foreign currency gain (loss)	(127)	(607)	(574)	(377)
Investment income	2,475	2,047	6,625	4,631
Other income (expense)	(445)	374	(344)	803
Income from continuing operations before income tax expense	112,150	56,342	212,918	125,604
Income tax expense (benefit) on continuing operations	9,802	2,667	8,843	14,030
Net income from continuing operations	102,348	53,675	204,075	111,574
Net income from discontinued operations	0	0	0	(255)
Net Income	$ 102,348	$ 53,675	$ 204,075	$ 111,319
Basic earnings per weighted-average common and common-equivalent share:
Net income from continuing operations	$ 1.18	$ 0.63	$ 2.36	$ 1.31
Net income (loss) from discontinued operations	0.00	0.00	0.00	0.00
Net income	1.18	0.63	2.36	1.31
Diluted earnings per weighted-average common and common-equivalent share:
Net income from continuing operations	1.14	0.61	2.28	1.29
Net income (loss) from discontinued operations	0.00	0.00	0.00	(0.01)
Net income	$ 1.14	$ 0.61	$ 2.28	$ 1.28
Weighted-average common and common-equivalent shares outstanding:
Basic	86,617	85,460	86,526	85,167
Diluted	89,677	87,346	89,562	86,805
Cash dividends per common share	$ 0.085	$ 0.075	$ 0.245	$ 0.22

XML

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 102,348	$ 53,675	$ 204,075	$ 111,319
Cash flow hedges:
Net unrealized gain (loss), net of tax of ($8) and $21 in the three-month periods and net of tax of ($5) and ($76) in the nine-month periods, respectively	(4)	(86)	(16)	(965)
Reclassification of net realized (gain) loss into current operations	(56)	241	(21)	427
Net change related to cash flow hedges	(60)	155	(37)	(538)
Available-for-sale investments:
Net unrealized gain (loss), net of tax of $41 and ($29) in the three-month periods and net of tax of $191 and $481 in the nine-month periods, respectively	419	40	1,237	2,672
Reclassification of net realized (gain) loss into current operations	(263)	(55)	(370)	(183)
Net change related to available-for-sale investments	156	(15)	867	2,489
Foreign currency translation adjustments:
Foreign currency translation adjustments, net of tax of $0 and $80 in the three-month periods and net of tax of $0 and $254 in the nine-month periods, respectively	5,753	1,125	18,497	3,739
Other comprehensive income (loss), net of tax	5,849	1,265	19,327	5,690
Total comprehensive income	$ 108,197	$ 54,940	$ 223,402	$ 117,009

XML

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Statement of Comprehensive Income [Abstract]
Tax effect on cash flow hedges	$ (8)	$ 21	$ (5)	$ (76)
Tax effect of unrealized gain (loss) on available-for-sale investments	41	(29)	191	481
Tax effect of foreign currency translation adjustment	$ 0	$ 80	$ 0	$ 254

XML

Consolidated Balance Sheets - USD ($)	Oct. 01, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 111,349,000	$ 79,641,000
Short-term investments	273,261,000	341,194,000
Accounts receivable, less reserves of $1,279 and $873 in 2017 and 2016, respectively	121,976,000	55,438,000
Unbilled revenue	51,612,000	2,217,000
Inventories	48,061,000	26,984,000
Prepaid expenses and other current assets	38,824,000	20,870,000
Total current assets	645,083,000	526,344,000
Long-term investments	386,501,000	324,335,000
Property, plant, and equipment, net	65,957,000	53,992,000
Goodwill	113,208,000	95,280,000
Intangible assets, net	14,427,000	8,312,000
Deferred income taxes	30,524,000	28,022,000
Other assets	2,817,000	2,319,000
Total assets	1,258,517,000	1,038,604,000
Current liabilities:
Accounts payable	30,331,000	9,830,000
Accrued expenses	53,070,000	42,539,000
Accrued income taxes	10,053,000	5,193,000
Deferred revenue and customer deposits	16,072,000	8,211,000
Total current liabilities	109,526,000	65,773,000
Reserve for income taxes	5,563,000	5,361,000
Other non-current liabilities	9,905,000	4,871,000
Total liabilities	124,994,000	76,005,000
Shareholders’ equity:
Common stock, $.002 par value – Authorized: 200,000 shares in 2017 and 2016, respectively, issued and outstanding: 86,587 and 85,939 shares in 2017 and 2016, respectively	173,000	172,000
Additional paid-in capital	443,132,000	375,030,000
Retained earnings	727,319,000	643,825,000
Accumulated other comprehensive loss, net of tax	(37,101,000)	(56,428,000)
Total shareholders’ equity	1,133,523,000	962,599,000
Total liabilities and shareholders' equity	$ 1,258,517,000	$ 1,038,604,000

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Reserves for accounts receivable	$ 1,279	$ 873
Common stock, par value	$ 0.002	$ 0.002
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	86,587,000	85,939,000

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016
Cash flows from operating activities:
Net income	$ 204,075	$ 111,319
Adjustments to reconcile net income to net cash provided by operating activities:
(Gain) loss on sale of discontinued business	0	255
Stock-based compensation expense	23,355	15,883
Depreciation of property, plant, and equipment	9,811	8,551
Amortization of intangible assets	2,539	2,581
Amortization of discounts or premiums on investments	188	288
Realized (gain) loss on sale of investments	(370)	(733)
Revaluation of contingent consideration	88	(463)
Change in deferred income taxes	(1,830)	(1,415)
Accounts receivable	(58,379)	(37,802)
Unbilled revenue	(46,010)	(9,986)
Inventories	(18,550)	10,780
Prepaid expenses and other current assets	(14,968)	(4,524)
Accounts payable	19,132	2,089
Accrued expenses	8,819	7,560
Accrued income taxes	3,233	(531)
Deferred revenue and customer deposits	7,060	4,071
Other	1,861	(1,265)
Net cash provided by operating activities	140,054	106,658
Cash flows from investing activities:
Purchases of investments	(415,508)	(598,955)
Maturities and sales of investments	428,076	529,207
Purchases of property, plant, and equipment	(20,044)	(10,491)
Cash paid for acquisition of businesses, net of cash acquired	(24,118)	(2,483)
Net cash provided by (used in) investing activities	(291)	(113)
Net cash provided by (used in) investing activities	(31,885)	(82,835)
Cash flows from financing activities:
Issuance of common stock under stock plans	44,750	23,091
Repurchase of common stock	(99,347)	(18,941)
Payment of dividends	(21,236)	(18,761)
Payment of contingent consideration	(1,926)	(337)
Net cash provided by (used in) financing activities	(77,759)	(14,948)
Effect of foreign exchange rate changes on cash and cash equivalents	1,298	295
Net change in cash and cash equivalents	31,708	9,170
Cash and cash equivalents at beginning of period	79,641	51,975
Cash and cash equivalents at end of period	$ 111,349	$ 61,145

XML

Consolidated Statement of Shareholders' Equity - 9 months ended Oct. 01, 2017 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance, Shares at Dec. 31, 2016	85,939,000	85,939,000
Beginning Balance at Dec. 31, 2016	$ 962,599	$ 172	$ 375,030	$ 643,825	$ (56,428)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock under stock plans, shares		1,732,000
Stockholders' Equity, Period Increase (Decrease)		$ 3
Issuance of common stock under stock plans	44,750		44,747
Stock Repurchased During Period, Shares		1,084,000
Stock repurchased during period, Value	99,347	$ 2		99,345
Stock-based compensation expense	23,355		23,355
Payment of dividends	(21,236)			(21,236)
Net income	204,075			204,075
Net unrealized gain (loss) on cash flow hedges, net of tax of ($5)	(16)				(16)
Reclassification of net realized loss on cash flow hedges	(21)				(21)
Net unrealized gain (loss) on available-for-sale investments, net of tax of $191	1,237				1,237
Reclassification of net realized (gain) loss on the sale of available-for-sale investments	(370)				(370)
Foreign currency translation adjustment, net of tax of $0	$ 18,497				18,497
Ending Balance, Shares at Oct. 01, 2017	86,587,000	86,587,000
Ending Balance at Oct. 01, 2017	$ 1,133,523	$ 173	$ 443,132	$ 727,319	$ (37,101)

XML

Consolidated Statement of Shareholders' Equity (Parenthetical) $ in Thousands	9 Months Ended
	Oct. 01, 2017 USD ($)
Statement of Stockholders' Equity [Abstract]
Tax effect on cash flow hedges	$ (5)
Tax effect of unrealized gain (loss) on available-for-sale investments	191
Foreign currency translation adjustment, tax	$ 0

XML

Summary of Significant Accounting Policies

9 Months Ended

Oct. 01, 2017

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). Cognex Corporation (the "Company") has provided new disclosures related to inventories and internal-use software 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, 2016 for a full description of 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, including those related to the disposition of a business, necessary to present fairly the Company’s financial position as of October 1, 2017, and the results of its operations for the three-month and nine-month periods ended October 1, 2017 and October 2, 2016, 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 and nine-month periods ended October 1, 2017 are not necessarily indicative of the results to be expected for the full year.

Inventories

On January 1, 2017, the Company adopted Accounting Standards Update (ASU) 2015-11 "Inventory - Simplifying the Measurement of Inventory." This Update requires companies to measure inventory at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. This adoption did not have an impact on the Company's inventory value.

Internal-use Software

The Company accounts for the costs of computer software developed or obtained for internal use under Accounting Standards Codification 350-40 "Intangibles - Goodwill and Other, Internal-use Software." Internal-use software is software acquired, internally developed, or modified solely to meet the entity's internal needs, and during the software's development, no substantive plan exists to sell the software.

The preliminary project stage includes conceptual formulation of design alternatives, determination of system requirements, vendor demonstrations, and final selection of vendors, and during this stage costs are expensed as incurred. The application development stage includes software configuration, coding, hardware installation, and testing. During this stage, certain costs are capitalized, including external direct costs of materials and services, as well as payroll and payroll-related costs for employees who are directly associated with the project, while certain costs are expensed as incurred, including training and data conversion costs. The post-implementation stage includes training and maintenance, and during this stage costs are expensed as incurred.

Capitalization begins when both the preliminary project stage is completed and management commits to funding the project. Capitalization ceases at the point the project is substantially complete and ready for its intended use, that is, after all substantial testing is completed. Costs of specified upgrades and enhancements to internal-use software are capitalized if it is probable that those expenditures result in additional functionality. Capitalized costs are amortized on a straight line basis over the estimated useful life.

XML

New Pronouncements

9 Months Ended

Oct. 01, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

New Pronouncements

New Pronouncements

Accounting Standards Update (ASU) 2014-09, “Revenue from Contracts with Customers”

The amendments in ASU 2014-09 will supersede and replace all currently existing U.S. GAAP, including industry-specific revenue recognition guidance, with a single, principle-based revenue recognition framework. The concept guiding this new model is that revenue recognition will depict transfer of control to the customer in an amount that reflects consideration to which an entity expects to be entitled. The core principles supporting this framework include (1) identifying the contract with a customer, (2) identifying separate performance obligations within the contract, (3) determining the transaction price, (4) allocating the transaction price to the performance obligations, and (5) recognizing revenue. This new framework will require entities to apply significantly more judgment. This increase in management judgment will require expanded disclosure on estimation methods, inputs, and assumptions for revenue recognition.

In March 2016, ASU 2016-08, "Principal versus Agent Considerations (Reporting Revenue Gross versus Net)," was issued, in April 2016, ASU 2016-10, "Identifying Performance Obligations and Licensing," was issued, in May 2016, ASU 2016-12, "Narrow-Scope Improvements and Practical Expedients," was issued, and in December 2016, ASU 2016-20, "Technical Corrections and Improvements," was issued. These Updates do not change the core principle of the guidance under ASU 2014-09, but rather provide implementation guidance. ASU 2015-14, "Deferral of the effective date," amended the effective date of ASU 2014-09 for public companies to annual reporting periods beginning after December 15, 2017. Early adoption is permitted, but only beginning after December 15, 2016. The Financial Accounting Standards Board may release additional implementation guidance in future periods.

We expect to adopt this standard using the full retrospective method to present all periods reported on a consistent basis. Upon adoption, revenue for software-only products sold as part of multiple-deliverable arrangements will no longer be deferred when vendor-specific objective evidence of fair value does not exist for undelivered elements of the arrangement. This change will likely result in earlier recognition of revenue. In addition, we expect certain of the Company’s product accessory sales, which are currently reported on a net basis, to be 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 will result 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 will not change. Furthermore, for arrangements that include customer-specified acceptance criteria, we expect to recognize revenue when we 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 will primarily impact revenue recognition for arrangements in the logistics industry where certain customer solutions include installed ID products and will likely result in earlier recognition of revenue. We do not expect these changes to have a material impact on total revenue. As of the date of this report, we have completed a number of implementation activities including the update of the Company's revenue accounting policy, the identification of internal controls under the new standard, the review of a selected number of contracts, and the calculation of transition-period adjustments. We are currently in the process of drafting the disclosures to finalize the implementation of this standard.

Accounting Standards Update (ASU) 2016-01, "Financial Instruments - Recognition and Measurement of Financial Assets and Financial Liabilities"

ASU 2016-01 provides guidance related to certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The amendments in this Update affect all entities that hold financial assets or owe financial liabilities. This ASU requires equity investments (except those accounted under the equity method) to be measured at fair value with changes in fair value recognized in net income. However, an entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment. This ASU also eliminates the requirement for public companies to disclose the methods and significant assumptions used to estimate the fair value for financial instruments measured at amortized cost on the balance sheet, and it requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements. For public companies, the guidance in ASU 2016-01 is effective for annual periods beginning after December 15, 2017, and interim periods within those annual periods. Early adoption is not permitted except for certain amendments in this Update. Management does not expect ASU 2016-01 to have a material impact on the Company's financial statements and disclosures.

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 evaluating the impact of this Update.

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) 2016-16, "Income Taxes - Intra-Entity Transfers of Assets Other than Inventory"

ASU 2016-16 applies to all reporting entities with intra-entity transfers of assets other than inventory. The amendments in this Update allow the recognition of deferred income taxes for an intra-entity transfer of an asset other than inventory when the transfer occurs, as opposed to when the asset has been sold to an outside party under current U.S. GAAP. Two common examples of assets included in the scope of this Update are intellectual property and property, plant, and equipment. For public companies, the amendments in ASU 2016-16 are effective for annual reporting periods beginning after December 15, 2017, and interim reporting periods within those annual periods. Early adoption is permitted for all entities as of the beginning of an annual reporting period for which financial statements (interim or annual) have not been issued or made available for issuance. 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. Management does not expect ASU 2016-16 to have a material impact on the Company's financial statements and disclosures.

Accounting Standards Update (ASU) 2017-01, "Business Combinations - Clarifying the Definition of a Business"

ASU 2017-01 applies to all reporting entities that must determine whether they have acquired or sold a business. The amendments in this Update clarify the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. For public companies, the amendments in ASU 2017-01 are effective for annual reporting periods beginning after December 15, 2017, and interim reporting periods within those annual periods. This ASU should be applied prospectively on or after the effective date and no disclosures are required at transition. Early adoption is permitted for transactions for which the acquisition date occurs before the issuance date or the effective date of the amendments in this Update, only when the transaction has not been reported in financial statements that have been issued. Management does not expect ASU 2017-01 to have a material impact on the Company's financial statements and disclosures.

Accounting Standards Update (ASU) 2017-04, "Intangibles - Goodwill and Other - Simplifying the Test for Goodwill Impairment"

ASU 2017-04 applies to all reporting entities that have goodwill reported in their financial statements. The amendments in this Update eliminate Step 2 from the goodwill impairment test reducing the cost and complexity of evaluating goodwill for impairment. In computing the implied fair value of goodwill under Step 2, an entity had to perform procedures to determine the fair value at the impairment date of its assets and liabilities as would be required in a business combination. Instead, under the amendments in this Update, an entity should perform its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value. For public companies, the amendments in ASU 2017-04 are effective for the annual or any interim goodwill impairment tests for reporting periods beginning after December 15, 2019. This ASU should be applied prospectively and an entity is required to disclose the nature of and reason for the change in accounting principle upon transition. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Management does not expect ASU 2017-04 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 is in the process of evaluating the impact of this Update.

Accounting Standards Update (ASU) 2017-09, "Compensation - Stock Compensation - Scope of Modification Accounting"

ASU 2017-09 applies to all reporting entities that change the terms or conditions of a share-based payment award. Currently, the definition of the term modification is broad and its interpretation results in diversity in practice. The amendments in this Update provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. An entity should account for the effects of a modification unless all the following are met: 1) the fair value of the modified award is the same as the fair value of the original award immediately before the original award is modified, 2) the vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified, and 3) the classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. For public companies, the amendments in ASU 2017-09 are effective for annual reporting periods beginning after December 15, 2017, and interim reporting periods within those annual periods. Early adoption is permitted including adoption in an interim period, for reporting periods for which financial statements have not yet been issued. This ASU should be applied prospectively to an award modified on or after the adoption date. Management does not expect ASU 2017-09 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 is in the process of evaluating the impact of this Update.

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Fair Value Measurements

9 Months Ended

Oct. 01, 2017

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 October 1, 2017 (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	$	6,700	$	—	$	—
Corporate bonds	—		311,509		—
Treasury bills	—		133,786		—
Asset-backed securities	—		106,909		—
Euro liquidity fund	—		52,312		—
Sovereign bonds	—		28,971		—
Agency bonds	—		13,245		—
Municipal bonds	—		13,030		—
Economic hedge forward contracts	—		13		—
Liabilities:
Economic hedge forward contracts	—		13		—
Contingent consideration liabilities	—		—		3,673

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 nine-month period ended October 1, 2017.

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 liability measured at fair value using Level 3 inputs for the nine-month period ended October 1, 2017 (in thousands):

Balance as of December 31, 2016	$	4,173
Payment of EnShape contingent consideration	(1,401		)
Payment of Manatee contingent consideration	(525		)
Contingent consideration resulting from GVi acquisition	1,299
Fair value adjustment to Manatee contingent consideration	(275		)
Fair value adjustment to Chiaro contingent consideration	185
Fair value adjustment to GVi contingent consideration	178
Foreign exchange rate changes	39
Balance as of October 1, 2017	$	3,673

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 nine-month period ended October 1, 2017.

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Cash, Cash Equivalents, and Investments

9 Months Ended

Oct. 01, 2017

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):

	October 1, 2017		December 31, 2016
Cash	$	104,649	$	77,307
Money market instruments	6,700		2,334
Cash and cash equivalents	111,349		79,641
Treasury bills	70,184		67,175
Corporate bonds	65,569		141,188
Euro liquidity fund	52,312		46,499
Asset-backed securities	47,840		69,614
Sovereign bonds	20,945		7,298
Municipal bonds	8,805		6,517
Agency bonds	7,606		2,903
Short-term investments	273,261		341,194
Corporate bonds	245,940		169,952
Treasury bills	63,602		92,280
Asset-backed securities	59,069		26,946
Sovereign bonds	8,026		23,585
Agency bonds	5,639		10,339
Municipal bonds	4,225		1,233
Long-term investments	386,501		324,335
	$	771,111	$	745,170

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; the Euro liquidity fund invests in a portfolio of investment-grade bonds; asset-backed securities consist of debt securities collateralized by pools of receivables or loans with credit enhancement; sovereign bonds consist of direct debt issued by foreign governments; municipal bonds consist of debt securities issued by state and local government entities; and agency bonds consist of domestic or foreign obligations of government agencies and government sponsored enterprises that have government backing. The Euro liquidity fund is denominated in Euros, and the remaining securities are denominated in U.S. Dollars.

The following table summarizes the Company’s available-for-sale investments as of October 1, 2017 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Treasury bills	$	70,311	$	—	$	(127	)	70,184
Corporate bonds	65,484		91		(6		)	65,569
Euro liquidity fund	51,929		383		—			52,312
Asset-backed securities	47,839		13		(12		)	47,840
Sovereign bonds	20,974		5		(34		)	20,945
Municipal bonds	8,805		—		—			8,805
Agency bonds	7,600		6		—			7,606
Long-term:
Corporate bonds	245,046		1,013		(119		)	245,940
Treasury bills	63,704		—		(102		)	63,602
Asset-backed securities	59,038		76		(45		)	59,069
Sovereign bonds	8,059		7		(40		)	8,026
Agency bonds	5,630		9		—			5,639
Municipal bonds	4,219		9		(3		)	4,225
	$	658,638	$	1,612	$	(488	)	$	659,762

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 October 1, 2017 (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
Treasury bills	$	95,174	$	(150	)	$	33,627	$	(79	)	$	128,801	$	(229	)
Asset-backed securities	51,878		(55		)	8,770		(2		)	60,648		(57		)
Corporate bonds	20,106		(33		)	15,154		(92		)	35,260		(125		)
Sovereign bonds	2,495		(5		)	19,854		(69		)	22,349		(74		)
Municipal bonds	1,356		(3		)	—		—			1,356		(3		)
	$	171,009	$	(246	)	$	77,405	$	(242	)	$	248,414	$	(488	)

As of October 1, 2017, 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 $306,000 and $43,000, respectively, during the three-month period ended October 1, 2017 and $55,000 and $0, respectively, during the three-month period ended October 2, 2016. The Company recorded gross realized gains and gross realized losses on the sale of debt securities totaling $449,000 and $79,000, respectively, during the nine-month period ended October 1, 2017 and $280,000 and $97,000, respectively, during the nine-month period ended October 2, 2016. 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 October 1, 2017 (in thousands):

	<1 year		1-2 Years		2-3 Years		3-4 Years		4-5 Years		5-7 Years		Total
Corporate bonds	$	65,569	$	109,918	$	77,430	$	17,223	$	39,956	$	1,413	$	311,509
Treasury bills	70,184		63,602		—		—		—		—		133,786
Asset-backed securities	47,840		35,502		16,075		—		2,328		5,164		106,909
Euro liquidity fund	52,312		—		—		—		—		—		52,312
Sovereign bonds	20,945		4,599		3,427		—		—		—		28,971
Agency bonds	7,606		2,719		—		—		2,920		—		13,245
Municipal bonds	8,805		2,869		1,356		—		—		—		13,030
	$	273,261	$	219,209	$	98,288	$	17,223	$	45,204	$	6,577	$	659,762

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Inventories

9 Months Ended

Oct. 01, 2017

Inventory Disclosure [Abstract]

Inventories

Inventories

Inventories consisted of the following (in thousands):

	October 1, 2017		December 31, 2016
Raw materials	$	23,146	$	18,224
Work-in-process	1,631		2,760
Finished goods	23,284		6,000
	$	48,061	$	26,984

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Goodwill

9 Months Ended

Oct. 01, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

Goodwill

The changes in the carrying value of goodwill were as follows (in thousands):

	Amount
Balance as of December 31, 2016	$	95,280
Acquisition of ViDi Systems S.A.	18,333
Acquisition of GVi Ventures, Inc.	1,476
Adjustment to EnShape goodwill	(1,881		)
Balance as of October 1, 2017	$	113,208

Refer to Note 15 to the Consolidated Financial Statements for further information regarding acquisitions.

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Intangible Assets

9 Months Ended

Oct. 01, 2017

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		3,571		10,116
Customer relationships	9,205		5,203		4,002
Non-compete agreements	370		61		309
Balance as of October 1, 2017	$	61,322	$	46,895	$	14,427
	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Distribution networks	$	38,060	$	37,422	$	638
Completed technologies	8,003		2,098		5,905
Customer relationships	6,605		4,836		1,769
Balance as of December 31, 2016	$	52,668	$	44,356	$	8,312

As of October 1, 2017, estimated future amortization expense related to intangible assets is as follows (in thousands):

Year Ended December 31,	Amount
Remainder of fiscal 2017	$	799
2018	3,196
2019	2,821
2020	2,305
2021	2,097
2022	1,691
Thereafter	1,518
	$	14,427

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Warranty Obligations

9 Months Ended

Oct. 01, 2017

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, 2016	$	4,335
Provisions for warranties issued during the period	2,322
Fulfillment of warranty obligations	(2,323		)
Foreign exchange rate changes	545
Balance as of October 1, 2017	$	4,879

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Derivative Instruments

9 Months Ended

Oct. 01, 2017

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 our budgeted revenues and expenses against foreign currency exchange rate changes compared to our 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):

	October 1, 2017			December 31, 2016
Currency	Notional Value	USD Equivalent		Notional Value	USD Equivalent
Derivatives Designated as Hedging Instruments:
Japanese Yen	—	$	—	342,500	$	2,960
Hungarian Forint	—	—		39,000	130
Singapore Dollar	—	—		150	97
Derivatives Not Designated as Hedging Instruments:
Japanese Yen	500,000	$	4,440	650,000	$	5,554
British Pound	1,720	2,294		1,350	1,658
Hungarian Forint	530,000	2,014		425,000	1,448
Korean Won	1,325,000	1,154		1,750,000	1,450
Singapore Dollar	—	—		1,350	929
Taiwanese Dollar	34,640	1,139		26,000	802
Swiss Franc	1,025	1,059		—	—

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	October 1, 2017		December 31, 2016		Sheet Location	October 1, 2017		December 31, 2016
Derivatives Designated as Hedging Instruments:
Cash flow hedge forward contracts	Prepaid expenses and other current assets	$	—	$	43	Accrued expenses	$	—	$	—
Derivatives Not Designated as Hedging Instruments:
Economic hedge forward contracts	Prepaid expenses and other current assets	$	13	$	1	Accrued expenses	$	13	$	11

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
	October 1, 2017		December 31, 2016				October 1, 2017		December 31, 2016
Gross amounts of recognized assets	$	13	$	117		Gross amounts of recognized liabilities	$	13	$	11
Gross amounts offset	—		(73		)	Gross amounts offset	—		—
Net amount of assets presented	$	13	$	44		Net amount of liabilities presented	$	13	$	11

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

	Location in Financial Statements	Three-months Ended					Nine-months Ended
		October 1, 2017		October 2, 2016			October 1, 2017		October 2, 2016
Derivatives Designated as Hedging Instruments:
Gains (losses) recorded in shareholders' equity (effective portion)	Accumulated other comprehensive income (loss), net of tax	$	—	$	(332	)	$	—	$	(332	)
Gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations (effective portion)	Revenue	$	56	$	(250	)	$	10	$	(453	)
	Research, development, and engineering expenses	—		1			3		5
	Selling, general, and administrative expenses	—		8			8		21
	Total gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations	$	56	$	(241	)	$	21	$	(427	)
Derivatives Not Designated as Hedging Instruments:
Gains (losses) recognized in current operations	Foreign currency gain (loss)	$	43	$	(24	)	$	139	$	(1,089	)

The following table provides the changes in accumulated other comprehensive income (loss), net of tax, related to derivative instruments (in thousands):

Balance as of December 31, 2016	$	37
Net unrealized loss on cash flow hedges	(16		)
Reclassification of net realized gain on cash flow hedges into current operations	(21		)
Balance as of October 1, 2017	$	—

Net gains expected to be reclassified from accumulated other comprehensive income (loss), net of tax, into current operations within the next twelve months are $0.

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Stock-Based Compensation Expense

9 Months Ended

Oct. 01, 2017

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 October 1, 2017, the Company had 6,183,376 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 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 generally be at least one year and three years, respectively, but vesting may occur incrementally over the three-year period.

The following table summarizes the Company’s stock option activity for the nine-month period ended October 1, 2017:

	Shares (in thousands)		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2016	6,433		$	32.16
Granted	1,980		77.87
Exercised	(1,731	)	25.85
Forfeited or expired	(84	)	45.57
Outstanding as of October 1, 2017	6,598		$	47.36	7.77	$	415,030
Exercisable as of October 1, 2017	1,707		$	27.96	5.68	$	140,559
Options vested or expected to vest as of October 1, 2017 (1)	5,795		$	45.86	7.63	$	373,276

 (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				Nine-months Ended
	October 1, 2017		October 2, 2016		October 1, 2017		October 2, 2016
Risk-free rate	2.4	%	1.7	%	2.4	%	1.7	%
Expected dividend yield	0.39	%	0.84	%	0.39	%	0.84	%
Expected volatility	41	%	41	%	41	%	41	%
Expected term (in years)	5.1		5.5		5.3		5.5

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 expects that approximately 75% of its stock options granted to senior management and 72% of its options granted to all other employees will actually vest. Therefore, the Company currently applies an estimated annual forfeiture rate of 10% to all unvested options for senior management and a rate of 12% for all other employees. The Company revised its estimated forfeiture rate in the first quarter of 2017, resulting in a decrease to compensation expense of $673,000. The Company also revised its estimated forfeiture rate in the first quarter of 2016, resulting in an increase to compensation expense of $334,000.

The weighted-average grant-date fair values of stock options granted during the three-month periods ended October 1, 2017 and October 2, 2016 were $29.59 and $12.34, respectively. The weighted-average grant-date fair values of stock options granted during the nine-month periods ended October 1, 2017 and October 2, 2016 were $29.94 and $12.25, respectively.

The total intrinsic values of stock options exercised for the three-month periods ended October 1, 2017 and October 2, 2016 were $28,462,000 and $23,139,000, respectively. The total intrinsic values of stock options exercised for the nine-month periods ended October 1, 2017 and October 2, 2016 were $100,913,000 and $32,514,000, respectively. The total fair values of stock options vested for the three-month periods ended October 1, 2017 and October 2, 2016 were $844,000 and $679,000, respectively. The total fair values of stock options vested for the nine-month periods ended October 1, 2017 and October 2, 2016 were $19,557,000 and $16,724,000, respectively.

As of October 1, 2017, total unrecognized compensation expense related to non-vested stock options was $41,354,000, which is expected to be recognized over a weighted-average period of 1.67 years.

The following table summarizes the Company's restricted stock activity for the nine-month period ended October 1, 2017:

	Shares (in thousands)		Weighted-Average Grant Fair Value		Aggregate Intrinsic Value (in thousands)(1)
Nonvested as of December 31, 2016	20		$	34.05
Granted	—		—
Vested	(10	)	34.05		825
Forfeited or expired	—		—
Nonvested as of October 1, 2017	10		$	34.05	$	1,103

(1) Fair market value as of April 22, 2017 for vested shares, and as of October 1, 2017 for nonvested shares.

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 October 1, 2017 were $8,026,000 and $2,639,000, respectively, and for the three-month period ended October 2, 2016 were $4,622,000 and $1,520,000, respectively. The total stock-based compensation expense and the related income tax benefit recognized for the nine-month period ended October 1, 2017 were $23,355,000 and $7,661,000, respectively, and for the nine-month period ended October 2, 2016 were $15,883,000 and $5,210,000, respectively. No compensation expense was capitalized as of October 1, 2017 or December 31, 2016.

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				Nine-months Ended
	October 1, 2017		October 2, 2016		October 1, 2017		October 2, 2016
Cost of revenue	$	520	$	273	$	1,404	$	795
Research, development, and engineering	2,765		1,366		8,090		4,942
Selling, general, and administrative	4,741		2,983		13,861		10,146
	$	8,026	$	4,622	$	23,355	$	15,883

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Stock Repurchase Program

9 Months Ended

Oct. 01, 2017

Equity [Abstract]

Stock Repurchase Program

Stock Repurchase Program

In November 2015, the Company's Board of Directors authorized the repurchase of $100,000,000 of the Company's common stock. As of October 1, 2017, the Company had repurchased 1,335,000 shares at a cost of $100,000,000 under this program, including 796,000 shares at a cost of $68,915,000 for the nine-month period ended October 1, 2017. In April 2017, the Company's Board of Directors authorized the repurchase of an additional $100,000,000 of the Company's common stock. Purchases under this April 2017 program commenced during the third quarter of 2017. As of October 1, 2017, the Company had repurchased 288,000 shares at a cost of $30,432,000 under this program. 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

9 Months Ended

Oct. 01, 2017

Income Tax Disclosure [Abstract]

Taxes

Taxes

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

	Three-months Ended				Nine-months Ended
	October 1, 2017		October 2, 2016		October 1, 2017		October 2, 2016
Income tax provision at federal statutory corporate tax rate	35	%	35	%	35	%	35	%
State income taxes, net of federal benefit	1	%	1	%	1	%	1	%
Foreign tax rate differential	(18	)%	(17	)%	(18	)%	(17	)%
Tax credit	(1	)%	(1	)%	(1	)%	(1	)%
Discrete tax benefit related to stock option exercises	(7	)%	(11	)%	(13	)%	(6	)%
Other discrete tax events	(2	)%	(2	)%	(1	)%	(1	)%
Other	1	%	—	%	1	%	—	%
Income tax provision on continuing operations	9	%	5	%	4	%	11	%

The majority of income earned outside of the United States is permanently 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 35%. 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. These differences resulted in a decrease in the effective tax rate by 18 percentage pointsfor the three-month and nine-month periods ended October 1, 2017, and a decrease in the effective tax rate by 17% percentage points for the three-month and nine-month periods ended October 2, 2016.

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 7 and 11 percentage points for the three-month periods ended October 1, 2017 and October 2, 2016, respectively, and a decrease of the effective tax rate by 13 and 6 percentage points for the nine-month periods ended October 1, 2017 and October 2, 2016, respectively.

During the nine-month period ended October 1, 2017, the Company recorded a $201,000 increase in reserves for income taxes, net of deferred tax benefit. Estimated interest and penalties included in these amounts totaled $22,000 for the nine-month period ended October 1, 2017.

The Company’s reserve for income taxes, including gross interest and penalties, was $6,591,000 as of October 1, 2017, which included $5,563,000 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 $701,000. 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 $1,000,000 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 2016 remain open to examination by the Internal Revenue Service and various state tax authorities. The tax years 2013 through 2016 remain open to examination by various taxing authorities in other jurisdictions in which the Company operates.

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Weighted-Average Shares

9 Months Ended

Oct. 01, 2017

Earnings Per Share [Abstract]

Weighted-Average Shares

Weighted-Average Shares

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

	Three-months Ended		Nine-months Ended
	October 1, 2017	October 2, 2016	October 1, 2017	October 2, 2016
Basic weighted-average common shares outstanding	86,617	85,460	86,526	85,167
Effect of dilutive stock options	3,060	1,886	3,036	1,638
Weighted-average common and common-equivalent shares outstanding	89,677	87,346	89,562	86,805

Stock options to purchase 233,081 and 1,554,129 shares of common stock, on a weighted-average basis, were outstanding during the three-month and nine-month periods ended October 1, 2017, respectively, and 491,375 and 3,641,279 for the same periods in 2016, but were not included in the calculation of dilutive net income per share because they were anti-dilutive.

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Discontinued Operations

9 Months Ended

Oct. 01, 2017

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations

Discontinued Operations

On July 6, 2015, the Company completed the sale of its Surface Inspection Systems Division (SISD). A binding arbitration was concluded in the second quarter of 2016 with respect to certain product performance claims made by an SISD customer, for which the Company remained responsible under the indemnity provisions of the sale transaction. In that proceeding, the tribunal ordered the Company to pay the customer approximately $326,000, primarily representing a refund of the product purchase price. The tribunal also ordered the customer to pay the Company approximately $45,000, primarily representing reimbursement of legal fees. The net settlement of $281,000 was recorded in discontinued operations in the second quarter of 2016, along with $123,000 of legal fees. The tax benefit related to this expense was $149,000, resulting in a net loss from discontinued operations of $255,000.

The losses included in discontinued operations were as follows (in thousands):

	Three-months Ended				Nine-months Ended
	October 1, 2017		October 2, 2016		October 1, 2017		October 2, 2016
Operating income from discontinued operations	$	—	$	—	$	—	$	—
Gain (loss) on sale of discontinued operations	—		—		—		(404		)
Income (loss) from discontinued operations before income tax expense (benefit)	—		—		—		(404		)
Income tax expense (benefit) on discontinued operations	—		—		—		(149		)
Net income (loss) from discontinued operations	$	—	$	—	$	—	$	(255	)

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Acquisitions

9 Months Ended

Oct. 01, 2017

Business Combinations [Abstract]

Acquisitions

Acquisitions

ViDi Systems S.A.

On April 4, 2017, the Company acquired all of the outstanding shares of ViDi Systems, S.A. (ViDi), a privately-held vision software company based in Switzerland. This transaction has been accounted for as a business combination.

The total purchase price of $23,015,000 included cash payment of $20,019,000, with the remaining $2,996,000 recorded as a holdback to secure potential claims under the agreement. The holdback limitation period is 18 months, and therefore, this amount has been recorded in "Other non-current liabilities" on the Consolidated Balance Sheet. In addition, the Company entered into a special incentive payment tied to employment, which is not material, that the Company will record as compensation expense.

Under this transaction, in addition to completed technologies, the Company acquired a team of software engineers that are expected to help the Company broaden the scope of applications that can be addressed with Cognex vision. ViDi's deep learning software uses artificial intelligence techniques to improve image analysis in applications where it is difficult to predict the full range of image variations that might be encountered. Using feedback, ViDi's software trains the system to distinguish between acceptable variations and defects. Assets acquired and liabilities assumed have been recorded at their estimated fair values as of the acquisition date.

The purchase price was allocated as follows (in thousands):

Cash	$	146
Accounts receivable	425
Prepaid expenses and other current assets	129
Property, plant, and equipment	40
Deferred income tax asset	620
Accounts payable	(98		)
Accrued expenses	(716		)
Deferred income tax liability	(1,008		)
Non-compete agreement	370
Completed technologies	4,774
Goodwill	18,333
Purchase price	$	23,015

The non-compete agreement and completed technology are included in "Intangible assets" on the Consolidated Balance Sheet. The non-compete agreement will be amortized to research, development and engineering expenses over three years, and the completed technology will be amortized to cost of revenue over six years, both on a straight-line basis. The portion of the acquired goodwill deductible for tax purposes is $5,112,000.Transaction costs were immaterial and were expensed as incurred.

GVi Ventures, Inc.

On April 12, 2017, the Company acquired selected assets and assumed selected liabilities of GVi Ventures, Inc., a privately-held maker of pre-configured vision solutions for common automotive applications based in the United States. This transaction has been accounted for as a business combination.

The total purchase price of $5,368,000 included cash payment of $4,069,000 and contingent consideration valued at $1,299,000 as of the acquisition date. In addition, the Company entered into special incentive payments tied to employment, none of which are material, that the Company will record as compensation expense.

The undiscounted potential outcomes related to the contingent consideration range from $0 to $3,500,000 based upon certain milestone revenue levels over the next five years. As of October 1, 2017, the fair value of the contingent consideration was $1,477,000, with $311,000 recorded in “Accrued expenses,” and $1,166,000 recorded in "Other non-current liabilities" on the Consolidated Balance Sheet. The contingent consideration is remeasured each reporting period with changes in fair value recorded in "Other income (expense)" on the Consolidated Statements of Operations.

Under this transaction, in addition to customer relationships and completed technologies, the Company acquired a team of software engineers that are expected to develop new products and increase the Company's ability to serve large customers in the automotive industry. Assets acquired and liabilities assumed have been recorded at their estimated fair values as of the acquisition date.

The purchase price was allocated as follows (in thousands):

Accounts receivable	$	423
Inventories	120
Prepaid expenses and other current assets	1
Accounts payable	(152		)
Accrued expenses	(10		)
Completed technologies	910
Customer relationships	2,600
Goodwill	1,476
Purchase price	$	5,368

The customer relationships and completed technologies are included in "Intangible assets" on the Consolidated Balance Sheet. The customer relationships are being amortized to selling, general, and administrative expenses overeightyears, and the completed technologies are being amortized to cost of revenue overfiveyears, both on a straight-line basis. A portion of the acquired goodwill is deductible for tax purposes. Transaction costs were immaterial and were expensed as incurred.

Pro-forma information for these acquisitions has not been presented because they are not material, either individually or in the aggregate.

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Subsequent Events

9 Months Ended

Oct. 01, 2017

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

On October 30, 2017, the Company’s Board of Directors declared a cash dividend of $0.09 per share. The dividend is payable December 1, 2017 to all shareholders of record as of the close of business on November 17, 2017.

In addition, on October 30, 2017, the Company's Board of Directors declared a two-for-one split of the Company's common stock. The split will be effected in the form of a stock dividend, payable on December 1, 2017 to all shareholders of record as of the close of business on November 17, 2017.

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Fair Value Measurements (Tables)

9 Months Ended

Oct. 01, 2017

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 October 1, 2017 (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	$	6,700	$	—	$	—
Corporate bonds	—		311,509		—
Treasury bills	—		133,786		—
Asset-backed securities	—		106,909		—
Euro liquidity fund	—		52,312		—
Sovereign bonds	—		28,971		—
Agency bonds	—		13,245		—
Municipal bonds	—		13,030		—
Economic hedge forward contracts	—		13		—
Liabilities:
Economic hedge forward contracts	—		13		—
Contingent consideration liabilities	—		—		3,673

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

The following table summarizes the activity for the Company's liability measured at fair value using Level 3 inputs for the nine-month period ended October 1, 2017 (in thousands):

Balance as of December 31, 2016	$	4,173
Payment of EnShape contingent consideration	(1,401		)
Payment of Manatee contingent consideration	(525		)
Contingent consideration resulting from GVi acquisition	1,299
Fair value adjustment to Manatee contingent consideration	(275		)
Fair value adjustment to Chiaro contingent consideration	185
Fair value adjustment to GVi contingent consideration	178
Foreign exchange rate changes	39
Balance as of October 1, 2017	$	3,673

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Cash, Cash Equivalents, and Investments (Tables)

9 Months Ended

Oct. 01, 2017

Cash and Cash Equivalents [Abstract]

Components of Cash, Cash Equivalents, and Investments

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

	October 1, 2017		December 31, 2016
Cash	$	104,649	$	77,307
Money market instruments	6,700		2,334
Cash and cash equivalents	111,349		79,641
Treasury bills	70,184		67,175
Corporate bonds	65,569		141,188
Euro liquidity fund	52,312		46,499
Asset-backed securities	47,840		69,614
Sovereign bonds	20,945		7,298
Municipal bonds	8,805		6,517
Agency bonds	7,606		2,903
Short-term investments	273,261		341,194
Corporate bonds	245,940		169,952
Treasury bills	63,602		92,280
Asset-backed securities	59,069		26,946
Sovereign bonds	8,026		23,585
Agency bonds	5,639		10,339
Municipal bonds	4,225		1,233
Long-term investments	386,501		324,335
	$	771,111	$	745,170

Summary of Available-for-Sale Investments

The following table summarizes the Company’s available-for-sale investments as of October 1, 2017 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Treasury bills	$	70,311	$	—	$	(127	)	70,184
Corporate bonds	65,484		91		(6		)	65,569
Euro liquidity fund	51,929		383		—			52,312
Asset-backed securities	47,839		13		(12		)	47,840
Sovereign bonds	20,974		5		(34		)	20,945
Municipal bonds	8,805		—		—			8,805
Agency bonds	7,600		6		—			7,606
Long-term:
Corporate bonds	245,046		1,013		(119		)	245,940
Treasury bills	63,704		—		(102		)	63,602
Asset-backed securities	59,038		76		(45		)	59,069
Sovereign bonds	8,059		7		(40		)	8,026
Agency bonds	5,630		9		—			5,639
Municipal bonds	4,219		9		(3		)	4,225
	$	658,638	$	1,612	$	(488	)	$	659,762

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 October 1, 2017 (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
Treasury bills	$	95,174	$	(150	)	$	33,627	$	(79	)	$	128,801	$	(229	)
Asset-backed securities	51,878		(55		)	8,770		(2		)	60,648		(57		)
Corporate bonds	20,106		(33		)	15,154		(92		)	35,260		(125		)
Sovereign bonds	2,495		(5		)	19,854		(69		)	22,349		(74		)
Municipal bonds	1,356		(3		)	—		—			1,356		(3		)
	$	171,009	$	(246	)	$	77,405	$	(242	)	$	248,414	$	(488	)

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 October 1, 2017 (in thousands):

	<1 year		1-2 Years		2-3 Years		3-4 Years		4-5 Years		5-7 Years		Total
Corporate bonds	$	65,569	$	109,918	$	77,430	$	17,223	$	39,956	$	1,413	$	311,509
Treasury bills	70,184		63,602		—		—		—		—		133,786
Asset-backed securities	47,840		35,502		16,075		—		2,328		5,164		106,909
Euro liquidity fund	52,312		—		—		—		—		—		52,312
Sovereign bonds	20,945		4,599		3,427		—		—		—		28,971
Agency bonds	7,606		2,719		—		—		2,920		—		13,245
Municipal bonds	8,805		2,869		1,356		—		—		—		13,030
	$	273,261	$	219,209	$	98,288	$	17,223	$	45,204	$	6,577	$	659,762

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Inventories (Tables)

9 Months Ended

Oct. 01, 2017

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consisted of the following (in thousands):

	October 1, 2017		December 31, 2016
Raw materials	$	23,146	$	18,224
Work-in-process	1,631		2,760
Finished goods	23,284		6,000
	$	48,061	$	26,984

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Goodwill (Tables)

9 Months Ended

Oct. 01, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying value of goodwill

The changes in the carrying value of goodwill were as follows (in thousands):

	Amount
Balance as of December 31, 2016	$	95,280
Acquisition of ViDi Systems S.A.	18,333
Acquisition of GVi Ventures, Inc.	1,476
Adjustment to EnShape goodwill	(1,881		)
Balance as of October 1, 2017	$	113,208

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Intangible Assets (Tables)

9 Months Ended

Oct. 01, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Amortized 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		3,571		10,116
Customer relationships	9,205		5,203		4,002
Non-compete agreements	370		61		309
Balance as of October 1, 2017	$	61,322	$	46,895	$	14,427
	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Distribution networks	$	38,060	$	37,422	$	638
Completed technologies	8,003		2,098		5,905
Customer relationships	6,605		4,836		1,769
Balance as of December 31, 2016	$	52,668	$	44,356	$	8,312

Estimated Amortization Expense Succeeding Fiscal Years

As of October 1, 2017, estimated future amortization expense related to intangible assets is as follows (in thousands):

Year Ended December 31,	Amount
Remainder of fiscal 2017	$	799
2018	3,196
2019	2,821
2020	2,305
2021	2,097
2022	1,691
Thereafter	1,518
	$	14,427

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Warranty Obligations (Tables)

9 Months Ended

Oct. 01, 2017

Product Warranties Disclosures [Abstract]

Changes in Warranty Obligations

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

Balance as of December 31, 2016	$	4,335
Provisions for warranties issued during the period	2,322
Fulfillment of warranty obligations	(2,323		)
Foreign exchange rate changes	545
Balance as of October 1, 2017	$	4,879

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Derivative Instruments (Tables)

9 Months Ended

Oct. 01, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Outstanding Forward Contracts Table

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

	October 1, 2017			December 31, 2016
Currency	Notional Value	USD Equivalent		Notional Value	USD Equivalent
Derivatives Designated as Hedging Instruments:
Japanese Yen	—	$	—	342,500	$	2,960
Hungarian Forint	—	—		39,000	130
Singapore Dollar	—	—		150	97
Derivatives Not Designated as Hedging Instruments:
Japanese Yen	500,000	$	4,440	650,000	$	5,554
British Pound	1,720	2,294		1,350	1,658
Hungarian Forint	530,000	2,014		425,000	1,448
Korean Won	1,325,000	1,154		1,750,000	1,450
Singapore Dollar	—	—		1,350	929
Taiwanese Dollar	34,640	1,139		26,000	802
Swiss Franc	1,025	1,059		—	—

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	October 1, 2017		December 31, 2016		Sheet Location	October 1, 2017		December 31, 2016
Derivatives Designated as Hedging Instruments:
Cash flow hedge forward contracts	Prepaid expenses and other current assets	$	—	$	43	Accrued expenses	$	—	$	—
Derivatives Not Designated as Hedging Instruments:
Economic hedge forward contracts	Prepaid expenses and other current assets	$	13	$	1	Accrued expenses	$	13	$	11

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
	October 1, 2017		December 31, 2016				October 1, 2017		December 31, 2016
Gross amounts of recognized assets	$	13	$	117		Gross amounts of recognized liabilities	$	13	$	11
Gross amounts offset	—		(73		)	Gross amounts offset	—		—
Net amount of assets presented	$	13	$	44		Net amount of liabilities presented	$	13	$	11

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					Nine-months Ended
		October 1, 2017		October 2, 2016			October 1, 2017		October 2, 2016
Derivatives Designated as Hedging Instruments:
Gains (losses) recorded in shareholders' equity (effective portion)	Accumulated other comprehensive income (loss), net of tax	$	—	$	(332	)	$	—	$	(332	)
Gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations (effective portion)	Revenue	$	56	$	(250	)	$	10	$	(453	)
	Research, development, and engineering expenses	—		1			3		5
	Selling, general, and administrative expenses	—		8			8		21
	Total gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations	$	56	$	(241	)	$	21	$	(427	)
Derivatives Not Designated as Hedging Instruments:
Gains (losses) recognized in current operations	Foreign currency gain (loss)	$	43	$	(24	)	$	139	$	(1,089	)

Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss)

The following table provides the changes in accumulated other comprehensive income (loss), net of tax, related to derivative instruments (in thousands):

Balance as of December 31, 2016	$	37
Net unrealized loss on cash flow hedges	(16		)
Reclassification of net realized gain on cash flow hedges into current operations	(21		)
Balance as of October 1, 2017	$	—

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Stock-Based Compensation Expense (Tables)

9 Months Ended

Oct. 01, 2017

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 nine-month period ended October 1, 2017:

	Shares (in thousands)		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2016	6,433		$	32.16
Granted	1,980		77.87
Exercised	(1,731	)	25.85
Forfeited or expired	(84	)	45.57
Outstanding as of October 1, 2017	6,598		$	47.36	7.77	$	415,030
Exercisable as of October 1, 2017	1,707		$	27.96	5.68	$	140,559
Options vested or expected to vest as of October 1, 2017 (1)	5,795		$	45.86	7.63	$	373,276

 (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				Nine-months Ended
	October 1, 2017		October 2, 2016		October 1, 2017		October 2, 2016
Risk-free rate	2.4	%	1.7	%	2.4	%	1.7	%
Expected dividend yield	0.39	%	0.84	%	0.39	%	0.84	%
Expected volatility	41	%	41	%	41	%	41	%
Expected term (in years)	5.1		5.5		5.3		5.5

Nonvested Restricted Stock Shares Activity

The following table summarizes the Company's restricted stock activity for the nine-month period ended October 1, 2017:

	Shares (in thousands)		Weighted-Average Grant Fair Value		Aggregate Intrinsic Value (in thousands)(1)
Nonvested as of December 31, 2016	20		$	34.05
Granted	—		—
Vested	(10	)	34.05		825
Forfeited or expired	—		—
Nonvested as of October 1, 2017	10		$	34.05	$	1,103

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				Nine-months Ended
	October 1, 2017		October 2, 2016		October 1, 2017		October 2, 2016
Cost of revenue	$	520	$	273	$	1,404	$	795
Research, development, and engineering	2,765		1,366		8,090		4,942
Selling, general, and administrative	4,741		2,983		13,861		10,146
	$	8,026	$	4,622	$	23,355	$	15,883

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Taxes (Tables)

9 Months Ended

Oct. 01, 2017

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 on continuing operations, or effective tax rate, was as follows:

	Three-months Ended				Nine-months Ended
	October 1, 2017		October 2, 2016		October 1, 2017		October 2, 2016
Income tax provision at federal statutory corporate tax rate	35	%	35	%	35	%	35	%
State income taxes, net of federal benefit	1	%	1	%	1	%	1	%
Foreign tax rate differential	(18	)%	(17	)%	(18	)%	(17	)%
Tax credit	(1	)%	(1	)%	(1	)%	(1	)%
Discrete tax benefit related to stock option exercises	(7	)%	(11	)%	(13	)%	(6	)%
Other discrete tax events	(2	)%	(2	)%	(1	)%	(1	)%
Other	1	%	—	%	1	%	—	%
Income tax provision on continuing operations	9	%	5	%	4	%	11	%

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Weighted-Average Shares (Tables)

9 Months Ended

Oct. 01, 2017

Earnings Per Share [Abstract]

Calculation of Weighted-Average Shares

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

	Three-months Ended		Nine-months Ended
	October 1, 2017	October 2, 2016	October 1, 2017	October 2, 2016
Basic weighted-average common shares outstanding	86,617	85,460	86,526	85,167
Effect of dilutive stock options	3,060	1,886	3,036	1,638
Weighted-average common and common-equivalent shares outstanding	89,677	87,346	89,562	86,805

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Discontinued Operations (Tables)

9 Months Ended

Oct. 01, 2017

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Discontinued Operations

The losses included in discontinued operations were as follows (in thousands):

	Three-months Ended				Nine-months Ended
	October 1, 2017		October 2, 2016		October 1, 2017		October 2, 2016
Operating income from discontinued operations	$	—	$	—	$	—	$	—
Gain (loss) on sale of discontinued operations	—		—		—		(404		)
Income (loss) from discontinued operations before income tax expense (benefit)	—		—		—		(404		)
Income tax expense (benefit) on discontinued operations	—		—		—		(149		)
Net income (loss) from discontinued operations	$	—	$	—	$	—	$	(255	)

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Acquisitions (Tables)

9 Months Ended

Oct. 01, 2017

Business Combinations [Abstract]

Schedule of Purchase Price Allocation

The purchase price was allocated as follows (in thousands):

Accounts receivable	$	423
Inventories	120
Prepaid expenses and other current assets	1
Accounts payable	(152		)
Accrued expenses	(10		)
Completed technologies	910
Customer relationships	2,600
Goodwill	1,476
Purchase price	$	5,368

The purchase price was allocated as follows (in thousands):

Cash	$	146
Accounts receivable	425
Prepaid expenses and other current assets	129
Property, plant, and equipment	40
Deferred income tax asset	620
Accounts payable	(98		)
Accrued expenses	(716		)
Deferred income tax liability	(1,008		)
Non-compete agreement	370
Completed technologies	4,774
Goodwill	18,333
Purchase price	$	23,015

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Assets:
Money market instruments	$ 6,700	$ 2,334
Financial assets at fair value	659,762
Corporate Bonds
Assets:
Financial assets at fair value	311,509
Treasury Bills
Assets:
Financial assets at fair value	133,786
Asset-Backed Securities
Assets:
Financial assets at fair value	106,909
Euro Liquidity Fund
Assets:
Financial assets at fair value	52,312
Sovereign Bonds
Assets:
Financial assets at fair value	28,971
Agency Bonds
Assets:
Financial assets at fair value	13,245
Municipal Bonds
Assets:
Financial assets at fair value	13,030
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Assets:
Money market instruments	6,700
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Assets:
Money market instruments	0
Economic hedge forward contracts	0
Liabilities:
Economic hedge forward contracts	13
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Corporate Bonds
Assets:
Financial assets at fair value	311,509
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Treasury Bills
Assets:
Financial assets at fair value	133,786
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Asset-Backed Securities
Assets:
Financial assets at fair value	106,909
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Euro Liquidity Fund
Assets:
Financial assets at fair value	52,312
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Sovereign Bonds
Assets:
Financial assets at fair value	28,971
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Agency Bonds
Assets:
Financial assets at fair value	13,245
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Municipal Bonds
Assets:
Financial assets at fair value	13,030
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Liabilities:
Contingent consideration liabilities	$ 3,673

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Fair Value Measurements - Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Payment of contingent consideration	$ (1,926)	$ (337)
Foreign Currency Transaction Gain (Loss), Unrealized	39
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	4,173
Ending balance	3,673
EnShape | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Payment of contingent consideration	(1,401)
Manatee | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Payment of contingent consideration	(525)
Fair value adjustment to Manatee contingent consideration	(275)
Chiaro | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value adjustment to Manatee contingent consideration	185
GVi
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value adjustment to Chiaro contingent consideration	1,299
GVi | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value adjustment to Manatee contingent consideration	$ 178

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Cash, Cash Equivalents, and Investments (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Cash and Cash Equivalents [Abstract]
Gross realized gains on sale of investments	$ 306,000	$ 55,000	$ 449,000	$ 280,000
Gross realized losses on sale of investments	$ 43,000	$ 0	$ 79,000	$ 97,000

XML

Cash, Cash Equivalents, and Investments - Components of Cash, Cash Equivalents, and Investments (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016	Oct. 02, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Cash	$ 104,649	$ 77,307
Money market instruments	6,700	2,334
Cash and cash equivalents	111,349	79,641	$ 61,145	$ 51,975
Short-term investments	273,261	341,194
Long-term investments	386,501	324,335
Total	771,111	745,170
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	70,184	67,175
Long-term investments	63,602	92,280
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	65,569	141,188
Long-term investments	245,940	169,952
Euro Liquidity Fund
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	52,312	46,499
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	47,840	69,614
Long-term investments	59,069	26,946
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	20,945	7,298
Long-term investments	8,026	23,585
Agency Bonds
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	7,606	2,903
Long-term investments	5,639	10,339
Municipal Bonds
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	8,805	6,517
Long-term investments	$ 4,225	$ 1,233

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Cash, Cash Equivalents, and Investments - Summary of Available-for-Sale Investments (Detail) $ in Thousands	Oct. 01, 2017 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 658,638
Gross unrealized gains	1,612
Gross unrealized losses	(488)
Fair value	659,762
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(229)
Treasury Bills | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	70,311
Gross unrealized gains	0
Gross unrealized losses	(127)
Fair value	70,184
Treasury Bills | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	63,704
Gross unrealized gains	0
Gross unrealized losses	(102)
Fair value	63,602
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(125)
Corporate Bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	65,484
Gross unrealized gains	91
Gross unrealized losses	(6)
Fair value	65,569
Corporate Bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	245,046
Gross unrealized gains	1,013
Gross unrealized losses	(119)
Fair value	245,940
Euro Liquidity Fund | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	51,929
Gross unrealized gains	383
Gross unrealized losses	0
Fair value	52,312
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(57)
Asset-Backed Securities | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	47,839
Gross unrealized gains	13
Gross unrealized losses	(12)
Fair value	47,840
Asset-Backed Securities | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	59,038
Gross unrealized gains	76
Gross unrealized losses	(45)
Fair value	59,069
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(74)
Sovereign Bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	20,974
Gross unrealized gains	5
Gross unrealized losses	(34)
Fair value	20,945
Sovereign Bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	8,059
Gross unrealized gains	7
Gross unrealized losses	(40)
Fair value	8,026
Agency Bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	7,600
Gross unrealized gains	6
Gross unrealized losses	0
Fair value	7,606
Agency Bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	5,630
Gross unrealized gains	9
Gross unrealized losses	0
Fair value	5,639
Municipal Bonds
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses	(3)
Municipal Bonds | Short-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	8,805
Gross unrealized gains	0
Gross unrealized losses	0
Fair value	8,805
Municipal Bonds | Long-Term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	4,219
Gross unrealized gains	9
Gross unrealized losses	(3)
Fair value	$ 4,225

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Cash, Cash Equivalents, and Investments - Gross Unrealized Losses and Fair Values for Available-for-Sale Investments (Detail) $ in Thousands	Oct. 01, 2017 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	$ 171,009
Unrealized losses, less than 12 months	(246)
Fair value, 12 months or greater	77,405
Unrealized losses, 12 months or greater	(242)
Total fair value	248,414
Total unrealized losses	(488)
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	95,174
Unrealized losses, less than 12 months	(150)
Fair value, 12 months or greater	33,627
Unrealized losses, 12 months or greater	(79)
Total fair value	128,801
Total unrealized losses	(229)
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	51,878
Unrealized losses, less than 12 months	(55)
Fair value, 12 months or greater	8,770
Unrealized losses, 12 months or greater	(2)
Total fair value	60,648
Total unrealized losses	(57)
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	2,495
Unrealized losses, less than 12 months	(5)
Fair value, 12 months or greater	19,854
Unrealized losses, 12 months or greater	(69)
Total fair value	22,349
Total unrealized losses	(74)
Municipal Bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	1,356
Unrealized losses, less than 12 months	(3)
Fair value, 12 months or greater	0
Unrealized losses, 12 months or greater	0
Total fair value	1,356
Total unrealized losses	(3)
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	20,106
Unrealized losses, less than 12 months	(33)
Fair value, 12 months or greater	15,154
Unrealized losses, 12 months or greater	(92)
Total fair value	35,260
Total unrealized losses	$ (125)

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Cash, Cash Equivalents, and Investments - Effective Maturity Dates of Available-for-Sale Investments (Detail) $ in Thousands	Oct. 01, 2017 USD ($)
Schedule of Available-for-sale Securities [Line Items]
1 year or less	$ 273,261
1-2 years	219,209
2-3 years	98,288
3-4 years	17,223
4-5 years	45,204
5-7 years	6,577
Fair value	659,762
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	65,569
1-2 years	109,918
2-3 years	77,430
3-4 years	17,223
4-5 years	39,956
5-7 years	1,413
Fair value	311,509
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
1 year or less	70,184
1-2 years	63,602
2-3 years	0
3-4 years	0
4-5 years	0
5-7 years	0
Fair value	133,786
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
1 year or less	47,840
1-2 years	35,502
2-3 years	16,075
3-4 years	0
4-5 years	2,328
5-7 years	5,164
Fair value	106,909
Euro Liquidity Fund
Schedule of Available-for-sale Securities [Line Items]
1 year or less	52,312
1-2 years	0
2-3 years	0
3-4 years	0
4-5 years	0
5-7 years	0
Fair value	52,312
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	20,945
1-2 years	4,599
2-3 years	3,427
3-4 years	0
4-5 years	0
5-7 years	0
Fair value	28,971
Agency Bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	7,606
1-2 years	2,719
2-3 years	0
3-4 years	0
4-5 years	2,920
5-7 years	0
Fair value	13,245
Municipal Bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	8,805
1-2 years	2,869
2-3 years	1,356
3-4 years	0
4-5 years	0
5-7 years	0
Fair value	$ 13,030

XML

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 23,146	$ 18,224
Work-in-process	1,631	2,760
Finished goods	23,284	6,000
Inventories	$ 48,061	$ 26,984

XML

Goodwill - Changes in the Carrying Value of Goodwill (Details) $ in Thousands	9 Months Ended
	Oct. 01, 2017 USD ($)
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 95,280
Goodwill, Ending Balance	113,208
ViDi Systems S.A.
Goodwill [Line Items]
Acquisition of ViDi Systems S.A.	18,333
Acquisition of GVi Ventures, Inc.	18,333
GVi Ventures, Inc.
Goodwill [Line Items]
Acquisition of ViDi Systems S.A.	1,476
Acquisition of GVi Ventures, Inc.	1,476
EnShape
Goodwill [Line Items]
Adjustment to EnShape goodwill	$ (1,881)

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Intangible Assets - Amortized Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 61,322	$ 52,668
Accumulated Amortization	46,895	44,356
Net Carrying Value	14,427	8,312
Distribution networks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	38,060	38,060
Accumulated Amortization	38,060	37,422
Net Carrying Value	0	638
Completed technologies
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	13,687	8,003
Accumulated Amortization	3,571	2,098
Net Carrying Value	10,116	5,905
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	9,205	6,605
Accumulated Amortization	5,203	4,836
Net Carrying Value	4,002	$ 1,769
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	370
Accumulated Amortization	61
Net Carrying Value	$ 309

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Intangible Assets - Estimated Amortization Expense Succeeding Fiscal Years (Details) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of fiscal 2017	$ 799
2018	3,196
2019	2,821
2020	2,305
2021	2,097
2022	1,691
Thereafter	1,518
Net Carrying Value	$ 14,427	$ 8,312

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Warranty Obligations - Changes in Warranty Obligations (Detail) $ in Thousands	9 Months Ended
	Oct. 01, 2017 USD ($)
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 4,335
Provisions for warranties issued during the period	2,322
Fulfillment of warranty obligations	(2,323)
Foreign exchange rate changes	545
Ending balance	$ 4,879

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Derivative Instruments (Detail)	9 Months Ended
	Oct. 01, 2017 Category
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Number of Instruments Held	2
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum length of time hedged in cash flow hedge	18 months
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Remaining maturity of foreign currency derivatives (up to)	45 days

XML

Derivative Instruments - Outstanding Forward Contracts Table (Detail) ₩ in Thousands, ¥ in Thousands, £ in Thousands, TWD in Thousands, SGD in Thousands, HUF in Thousands, $ in Thousands	Oct. 01, 2017 HUF	Oct. 01, 2017 GBP (£)	Oct. 01, 2017 SGD	Oct. 01, 2017 JPY (¥)	Oct. 01, 2017 KRW (₩)	Oct. 01, 2017 TWD	Oct. 01, 2017 USD ($)	Dec. 31, 2016 HUF	Dec. 31, 2016 GBP (£)	Dec. 31, 2016 SGD	Dec. 31, 2016 JPY (¥)	Dec. 31, 2016 KRW (₩)	Dec. 31, 2016 TWD	Dec. 31, 2016 USD ($)
Designated as Hedging Instrument | Japanese Yen
Derivative [Line Items]
Outstanding forward contracts				¥ 0			$ 0				¥ 342,500			$ 2,960
Designated as Hedging Instrument | Hungarian Forint
Derivative [Line Items]
Outstanding forward contracts	HUF 0						0	HUF 39,000						130
Designated as Hedging Instrument | Singapore Dollar
Derivative [Line Items]
Outstanding forward contracts			SGD 0				0			SGD 150				97
Not Designated as Hedging Instrument | Japanese Yen
Derivative [Line Items]
Outstanding forward contracts				¥ 500,000			4,440				¥ 650,000			5,554
Not Designated as Hedging Instrument | Hungarian Forint
Derivative [Line Items]
Outstanding forward contracts	HUF 530,000						2,014	HUF 425,000						1,448
Not Designated as Hedging Instrument | Singapore Dollar
Derivative [Line Items]
Outstanding forward contracts			SGD 0				0			SGD 1,350				929
Not Designated as Hedging Instrument | British Pound
Derivative [Line Items]
Outstanding forward contracts		£ 1,720					2,294		£ 1,350					1,658
Not Designated as Hedging Instrument | Korean Won
Derivative [Line Items]
Outstanding forward contracts					₩ 1,325,000		1,154					₩ 1,750,000		1,450
Not Designated as Hedging Instrument | Taiwanese Dollar
Derivative [Line Items]
Outstanding forward contracts						TWD 34,640	$ 1,139						TWD 26,000	$ 802

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Derivative Instruments - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative asset	$ 13	$ 44
Derivative liability	13	11
Designated as Hedging Instrument | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset	0	43
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	13	1
Not Designated as Hedging Instrument | Accrued Expenses
Derivatives, Fair Value [Line Items]
Derivative liability	$ 13	$ 11

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Derivative Instruments - Offsetting Assets (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross amounts of recognized assets	$ 13	$ 117
Gross amounts offset	0	(73)
Net amount of assets presented	13	44
Gross amounts of recognized liabilities	13	11
Gross amounts offset	0	0
Net amount of liabilities presented	$ 13	$ 11

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Derivative Instruments - Derivative Instruments, Gain (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations	$ 56	$ (241)	$ 21	$ (427)
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	(332)	0	(332)
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)	56	(250)	10	(453)
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	1	3	5
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	8	21
Not Designated as Hedging Instrument | Foreign Currency Gain (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in current operations	$ 43	$ (24)	$ 139	$ (1,089)

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Derivative Instruments - Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) (Detail)	9 Months Ended
	Oct. 01, 2017 USD ($)
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ (56,428,000)
Ending balance	(37,101,000)
Net gains expected to be reclassified from OCI into Net Income, net of tax, 12 months	0
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	37,000
Net unrealized loss on cash flow hedges	(16,000)
Reclassification of net realized gain on cash flow hedges into current operations	(21,000)
Ending balance	$ 0

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Stock-Based Compensation Expense (Detail)	3 Months Ended				9 Months Ended
	Oct. 01, 2017 USD ($) group $ / shares shares	Apr. 02, 2017 USD ($)	Oct. 02, 2016 USD ($) $ / shares	Apr. 03, 2016 USD ($)	Oct. 01, 2017 USD ($) group $ / shares shares	Oct. 02, 2016 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.39%		0.84%		0.39%	0.84%
Groups within the employee population | group	2				2
Percentage of stock options granted to senior management expected to vest	75.00%				75.00%
Percentage of stock options granted to all other employees expected to vest	72.00%				72.00%
Estimated annual forfeiture rate for unvested options for senior management	10.00%				10.00%
Estimated annual forfeiture rate for unvested options for all other employees	12.00%				12.00%
Increase (decrease) to compensation expense		$ 673,000		$ 334,000
Weighted-average grant-date fair values, in dollars per share | $ / shares	$ 29.59		$ 12.34		$ 29.94	$ 12.25
Total intrinsic value	$ 28,462,000		$ 23,139,000		$ 100,913,000	$ 32,514,000
Total fair values of stock options vest	844,000		679,000		19,557,000	16,724,000
Unrecognized compensation expense	41,354,000				$ 41,354,000
Weighted average period to be recognized					1 year 8 months 1 day
Stock-based compensation expense	8,026,000		4,622,000		$ 23,355,000	15,883,000
Tax benefit from compensation expense	2,639,000		$ 1,520,000		7,661,000	$ 5,210,000
Recognized period costs capitalized	$ 0				$ 0
Vesting period, performance-based restricted stock, years					1 year
Vesting period, time-based restricted stock, years					3 years
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	6,183,376				6,183,376
Expiration period from grant day					10 years

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Stock-Based Compensation Expense - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Oct. 01, 2017	Oct. 01, 2017
Shares (in thousands)
Outstanding, shares	6,433
Granted, shares	1,980
Exercised, shares	(1,731)
Forfeited or expired, shares	(84)
Outstanding, shares	6,598
Exercisable as of reporting date, shares		1,707
Options vested or expected to vest as of reporting date, shares		5,795
Weighted- Average Exercise Price
Outstanding, shares	$ 32.16
Granted, in dollars per share	77.87
Exercised, in dollars per share	25.85
Forfeited or expired, in dollars per share	45.57
Outstanding, shares	47.36
Outstanding	$ 32.16	$ 47.36
Exercisable as of reporting date, Weighted-Average Exercise Price, in dollars per share		27.96
Weighted- Average Remaining Contractual Term (in years)		$ 45.86
Weighted- Average Remaining Contractual Term (in years)
Outstanding, in years	7 years 9 months 7 days
Exercisable, in years	5 years 8 months 5 days
Options vested or expected to vest, in years	7 years 7 months 17 days
Aggregate Intrinsic Value (in thousands)
Outstanding, in dollars		$ 415,030
Exercisable, in dollars		140,559
Options vested or expected to vest, in dollars		$ 373,276

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Stock-Based Compensation Expense - Weighted-Average Assumptions Used in Estimating Fair Values of Stock Options Granted (Detail)	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free rate	2.40%	1.70%	2.40%	1.70%
Expected dividend yield	0.39%	0.84%	0.39%	0.84%
Expected volatility	41.00%	41.00%	41.00%	41.00%
Expected term (in years)	5 years 1 month 6 days	5 years 6 months	5 years 3 months 18 days	5 years 6 months

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Stock-Based Compensation Expense - Nonvested Restricted Stock Shares Activity (Details) - Restricted Stock $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Oct. 01, 2017 USD ($) $ / shares shares
Shares (in thousands)
Nonvested, shares | shares	20
Granted, shares | shares	0
Vested, shares | shares	(10)
Forfeited or expired, shares | shares	0
Nonvested, shares | shares	10
Weighted-Average Grant Fair Value
Nonvested, in dollars per share | $ / shares	$ 34.05
Granted, in dollars per share | $ / shares	0.00
Vested, in dollars per share | $ / shares	34.05
Forfeited or expired, in dollars per share | $ / shares	0.00
Nonvested, in dollars per share | $ / shares	$ 34.05
Aggregate Intrinsic Value (in thousands)(1)
Vested | $	$ 825
Nonvested as of October 1, 2017 | $	$ 1,103

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Stock-Based Compensation Expense - Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 8,026,000	$ 4,622,000	$ 23,355,000	$ 15,883,000
Cost of Revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	520,000	273,000	1,404,000	795,000
Research, Development, and Engineering Expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	2,765,000	1,366,000	8,090,000	4,942,000
Selling, General, and Administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 4,741,000	$ 2,983,000	$ 13,861,000	$ 10,146,000

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Stock Repurchase Program (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Oct. 01, 2017	Oct. 01, 2017	Apr. 28, 2017	Aug. 03, 2015
Equity, Class of Treasury Stock [Line Items]
Stock repurchased during period, Value		$ 99,347,000
Repurchase Program 2015
Equity, Class of Treasury Stock [Line Items]
Authorized common stock to be repurchased				$ 100,000,000
Stock Repurchased During Period, Shares	1,335,000	796,000
Stock repurchased during period, Value	$ 100,000,000	$ 68,915,000
Stock Repurchase Program April 2017
Equity, Class of Treasury Stock [Line Items]
Authorized common stock to be repurchased			$ 100,000,000
Stock Repurchased During Period, Shares		288,000
Stock repurchased during period, Value		$ 30,432,000

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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		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Income Tax Disclosure [Abstract]
Income tax provision at federal statutory corporate tax rate	35.00%	35.00%	35.00%	35.00%
State income taxes, net of federal benefit	1.00%	1.00%	1.00%	1.00%
Foreign tax rate differential	(18.00%)	(17.00%)	(18.00%)	(17.00%)
Tax credit	(1.00%)	(1.00%)	(1.00%)	(1.00%)
Discrete tax benefit related to stock option exercises	(7.00%)	(11.00%)	(13.00%)	(6.00%)
Other discrete tax events	(2.00%)	(2.00%)	(1.00%)	(1.00%)
Other	1.00%	0.00%	1.00%	0.00%
Income tax provision on continuing operations	9.00%	5.00%	4.00%	11.00%

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Taxes (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016	Dec. 31, 2016
Income Tax Contingency [Line Items]
Income tax provision at federal statutory corporate tax rate	35.00%	35.00%	35.00%	35.00%
Decrease in effective tax rate	18.00%	17.00%	18.00%	17.00%
Decrease in effective tax rate for difference between deduction for tax purposes and compensation cost recognized from stock option exercises	7.00%	11.00%	13.00%	6.00%
Increase in reserves for income taxes, net of deferred tax benefit	$ 201,000		$ 201,000
Interest and penalties included in reserve			22,000
Liability for uncertain tax positions	6,591,000		6,591,000
Reserve for income taxes classified as a noncurrent iability	5,563,000		5,563,000		$ 5,361,000
Reserve for income taxes classified an noncurrent deferred tax assets	1,028,000		1,028,000
Interest and penalties, gross	$ 701,000		701,000
Minimum decrease in income tax expense due to release in reserves			1,000,000
Maximum decrease in income tax expense due to release in reserves			$ 1,200,000
Tax years open to examination by Internal Revenue Service			2014 through 2016
Tax years open to examination by various taxing authorities for other entities			2013 through 2016
Foreign Tax Authority | Revenue Commissioners, Ireland
Income Tax Contingency [Line Items]
Income tax provision at federal statutory corporate tax rate			12.50%
Foreign Tax Authority | State Administration of Taxation, China
Income Tax Contingency [Line Items]
Income tax provision at federal statutory corporate tax rate			25.00%
Domestic Tax Authority
Income Tax Contingency [Line Items]
Income tax provision at federal statutory corporate tax rate			35.00%

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Weighted-Average Shares (Detail) - shares	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Earnings Per Share [Abstract]
Stock options to purchase anti-dilutive common stock	233,081	491,375	1,554,129	3,641,279

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Weighted-Average Shares - Calculation of Weighted-Average Shares (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Earnings Per Share [Abstract]
Basic weighted-average common shares outstanding	86,617	85,460	86,526	85,167
Effect of dilutive stock options	3,060	1,886	3,036	1,638
Weighted-average common and common-equivalent shares outstanding	89,677	87,346	89,562	86,805

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Discontinued Operations - Schedule of Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Revenue and Expenses
Income (loss) from discontinued operations before income tax expense (benefit)	$ 0	$ 0	$ 0	$ (255)
SISD | Discontinued Operations, Disposed of by Sale
Revenue and Expenses
Operating income from discontinued operations	0	0	0	0
Gain (loss) on sale of discontinued operations	0	0	0	(404)
Income (loss) from discontinued operations before income tax expense (benefit)	0	0	0	(404)
Income tax expense (benefit) on discontinued operations	0	0	0	(149)
Net income (loss) from discontinued operations	$ 0	$ 0	$ 0	$ (255)

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Discontinued Operations (Details) - SISD - Discontinued Operations, Disposed of by Sale - USD ($)	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense (benefit) on discontinued operations	$ 0	$ 0	$ 0	$ (149,000)
Net income (loss) from discontinued operations	0	$ 0	$ 0	$ (255,000)
AMETEK Matter | Guarantee Obligations | Settled Litigation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Damages awarded, refund of product purchase price	326,000
Damages awarded, reimbursement of legal fees	45,000
Net settlement	281,000
Legal fees	123,000
Income tax expense (benefit) on discontinued operations	(149,000)
Net income (loss) from discontinued operations	$ (255,000)

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Acquisitions (Details) - USD ($)	Apr. 12, 2017	Apr. 04, 2017	Oct. 01, 2017
ViDi Systems S.A.
Business Acquisition [Line Items]
Total purchase price		$ 23,015,000
Cash payment		20,019,000
Holdback to secure potential claims under agreement		$ 2,996,000
Holdback limitation period		18 months
tax deductible goodwill		$ 5,112,000
ViDi Systems S.A. | Completed technologies
Business Acquisition [Line Items]
Amortization period		6 years
ViDi Systems S.A. | Non-compete agreement
Business Acquisition [Line Items]
Amortization period		3 years
GVi Ventures, Inc.
Business Acquisition [Line Items]
Total purchase price	$ 5,368,000
Cash payment	4,069,000
Contingent consideration liabilities	1,299,000		$ 1,477,000
Contingent consideration, low range	0
Contingent consideration, high range	$ 3,500,000
Contingent consideration, period of recognition (in years)	5 years
Contingent consideration, current			311,000
Contingent consideration, noncurrent			$ 1,166,000
GVi Ventures, Inc. | Completed technologies
Business Acquisition [Line Items]
Amortization period	5 years
GVi Ventures, Inc. | Customer relationships
Business Acquisition [Line Items]
Amortization period	8 years

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Acquisitions - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Oct. 01, 2017	Apr. 12, 2017	Apr. 04, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill	$ 113,208			$ 95,280
ViDi Systems S.A.
Business Acquisition [Line Items]
Cash			$ 146
Accounts receivable			425
Prepaid expenses and other current assets			129
Property, plant, and equipment			40
Deferred income tax asset			620
Accounts payable			(98)
Accrued expenses			(716)
Deferred income tax liability			(1,008)
Goodwill			18,333
Purchase price			23,015
ViDi Systems S.A. | Non-compete agreement
Business Acquisition [Line Items]
Intangible assets			370
ViDi Systems S.A. | Completed technologies
Business Acquisition [Line Items]
Intangible assets			$ 4,774
GVi Ventures, Inc.
Business Acquisition [Line Items]
Accounts receivable		$ 423
Inventories		120
Prepaid expenses and other current assets		1
Accounts payable		(152)
Accrued expenses		(10)
Goodwill		1,476
Purchase price		5,368
GVi Ventures, Inc. | Completed technologies
Business Acquisition [Line Items]
Intangible assets		910
GVi Ventures, Inc. | Customer relationships
Business Acquisition [Line Items]
Intangible assets		$ 2,600

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Subsequent Events (Details) - Subsequent Event	Oct. 30, 2017 USD ($)
Subsequent Event [Line Items]
Dividends (in dollars per share)	$ 0.09
Dividends payable, date payable	Dec. 01, 2017
Dividends payable, date of record	Nov. 17, 2017
Stock split ratio	2