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 June 30, 2013

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, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting 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	¨

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 June 30, 2013, there were 43,496,801 shares of Common Stock, $.002 par value per share, of the registrant outstanding.

INDEX

PART I	FINANCIAL INFORMATION
Item 1.	Financial Statements (interim periods unaudited)
	Consolidated Statements of Operations for the three-month and six-month periods ended June  30, 2013 and July 1, 2012	3
	Consolidated Statements of Comprehensive Income for the three-month and six-month periods ended June  30, 2013 and July 1, 2012	4
	Consolidated Balance Sheets as of June 30, 2013 and December 31, 2012	5
	Consolidated Statement of Shareholders’ Equity for the six-month period ended June 30, 2013	6
	Consolidated Condensed Statements of Cash Flows for the six-month periods ended June  30, 2013 and July 1, 2012	7
	Notes to Consolidated Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	21
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	27
Item 4.	Controls and Procedures	28
PART II	OTHER INFORMATION	29
Item 1.	Legal Proceedings	29
Item 1A.	Risk Factors	30
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	30
Item 3.	Defaults Upon Senior Securities	31
Item 4.	Mine Safety Disclosures	31
Item 5.	Other Information	31
Item 6.	Exhibits	31
	Signatures	32

2

COGNEX CORPORATION

CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share amounts)

	Three-months Ended						Six-months Ended
	June 30,			July 1,			June 30,			July 1,
	2013			2012			2013			2012
	(unaudited)						(unaudited)
Revenue
Product	$	79,698		$	78,449		$	154,370		$	149,856
Service		6,812			5,877			13,032			12,179
		86,510			84,326			167,402			162,035
Cost of revenue
Product		17,910			17,635			34,374			33,191
Service		3,240			2,914			6,199			6,416
		21,150			20,549			40,573			39,607
Gross margin
Product		61,788			60,814			119,996			116,665
Service		3,572			2,963			6,833			5,763
		65,360			63,777			126,829			122,428
Research, development, and engineering expenses		11,887			10,300			23,208			20,661
Selling, general, and administrative expenses		33,300			30,127			65,467			60,676
Operating income		20,173			23,350			38,154			41,091
Foreign currency gain (loss)		76			(30	)		139			(668	)
Investment income		774			1,801			1,166			2,773
Other expense		(257	)		(99	)		(140	)		(96	)
Income before income tax expense		20,766			25,022			39,319			43,100
Income tax expense		3,946			5,255			6,916			9,051
Net income	$	16,820		$	19,767		$	32,403		$	34,049
Earnings per weighted-average common and common-equivalent share:
Basic	$	0.39		$	0.46		$	0.75		$	0.80
Diluted	$	0.38		$	0.45		$	0.73		$	0.78
Weighted-average common and common-equivalent shares outstanding:
Basic		43,522			42,851			43,392			42,710
Diluted		44,357			43,601			44,251			43,599
Cash dividends per common share	$	0.00		$	0.11		$	0.00		$	0.21

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						Six-months Ended
	June 30,			July 1,			June 30,			July 1,
	2013			2012			2013			2012
	(unaudited)						(unaudited)
Net income	$	16,820		$	19,767		$	32,403		$	34,049
Other comprehensive loss, net of tax:
Net unrealized gain (loss) on available-for-sale investments, net of tax of ($318) and ($91) in the three-month periods and net of tax of ($276) and $200 in the six-month periods, respectively		(1,279	)		304			(1,106	)		1,618
Foreign currency translation adjustments, net of tax of $46 and ($403) in the three-month periods and net of tax of ($181) and ($197) in the six-month periods, respectively		687			(14,507	)		(1,807	)		(9,181	)
Other comprehensive loss		(592	)		(14,203	)		(2,913	)		(7,563	)
Comprehensive income	$	16,228		$	5,564		$	29,490		$	26,486

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

4

COGNEX CORPORATION

CONSOLIDATED BALANCE SHEETS

(In thousands)

	June 30,			December 31,
	2013			2012
	(unaudited)
ASSETS
Current assets:
Cash and cash equivalents		47,874		$	45,160
Short-term investments		135,289			105,105
Accounts receivable, less reserves of $1,134 and $1,131 in 2013 and 2012, respectively		45,215			42,387
Inventories		26,653			26,182
Deferred income taxes		6,371			6,369
Prepaid expenses and other current assets		15,777			14,394
Total current assets		277,179			239,597
Long-term investments		243,108			238,255
Property, plant, and equipment, net		35,343			34,820
Deferred income taxes		17,820			15,647
Intangible assets, net		12,849			14,770
Goodwill		81,689			81,689
Other assets		2,388			2,827
	$	670,376		$	627,605
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	7,157		$	6,815
Accrued expenses		28,279			29,590
Accrued income taxes		208			1,009
Deferred revenue and customer deposits		13,479			12,690
Total current liabilities		49,123			50,104
Reserve for income taxes		6,255			5,216
Commitments and contingencies (Note 8)
Shareholders’ equity:
Common stock, $.002 par value – Authorized: 140,000 shares, issued: 43,497 and 43,055 shares in 2013 and 2012, respectively		87			86
Additional paid-in capital		190,444			165,248
Retained earnings		456,978			436,466
Accumulated other comprehensive loss, net of tax		(32,511	)		(29,515	)
Total shareholders’ equity		614,998			572,285
	$	670,376		$	627,605

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

5

COGNEX CORPORATION

CONSOLIDATED STATEMENT OF SHAREHOLDERS’ EQUITY

(In thousands)

	Common Stock					Additional Paid-in		Retained			Accumulated Other Comprehensive			Total Shareholders’
	Shares			Par Value		Capital		Earnings			Loss			Equity
Balance as of December 31, 2012		43,055		$	86	$	165,248	$	436,466		$	(29,515	)	$	572,285
Issuance of common stock under stock option plans		710			1		16,241		—			—			16,242
Repurchase of common stock		(268	)		—		—		(11,891	)		—			(11,891	)
Stock-based compensation expense		—			—		6,079		—			—			6,079
Excess tax benefit from stock option exercises		—			—		2,773		—			—			2,773
Tax benefit for research and development credits as a result of stock option accounting		—			—		103		—			—			103
Net income		—			—		—		32,403			—			32,403
Net unrealized loss on available-for-sale investments, net of tax of $276		—			—		—		—			(1,106	)		(1,106	)
Reclassification of net realized gain on the sale of available-for-sale investments		—			—		—		—			(83	)		(83	)
Foreign currency translation adjustment, net of tax of $181		—			—		—		—			(1,807	)		(1,807	)
Balance as of June 30, 2013 (unaudited)		43,497		$	87	$	190,444	$	456,978		$	(32,511	)	$	614,998

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

6

COGNEX CORPORATION

CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS

(In thousands)

	Six-months Ended
	June 30,			July 1,
	2013			2012
	(unaudited)
Cash flows from operating activities:
Net income	$	32,403		$	34,049
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense		6,079			5,303
Depreciation of property, plant, and equipment		3,596			3,180
Amortization of intangible assets		1,921			2,086
Amortization of discounts or premiums on investments		1,443			3,582
Realized gain on sale of investments		(83	)		(1,071	)
Tax effect of stock option exercises		(2,773	)		(2,969	)
Change in deferred income taxes		(1,748	)		(1,076	)
Unrealized loss on trading securities		462			—
Change in operating assets and liabilities		(2,325	)		(2,912	)
Net cash provided by operating activities		38,975			40,172
Cash flows from investing activities:
Purchases of investments		(167,652	)		(109,104	)
Maturities and sales of investments		129,329			242,952
Purchases of property, plant, and equipment		(4,310	)		(5,304	)
Net cash provided by (used in) investing activities		(42,633	)		128,544
Cash flows from financing activities:
Issuance of common stock under stock option plans		16,242			13,929
Repurchase of common stock		(11,891	)		—
Payment of dividends		—			(8,985	)
Tax effect of stock option exercises		2,773			2,969
Net cash provided by financing activities		7,124			7,913
Effect of foreign exchange rate changes on cash and cash equivalents		(752	)		(8,740	)
Net change in cash and cash equivalents		2,714			167,889
Cash and cash equivalents at beginning of period		45,160			38,103
Cash and cash equivalents at end of period	$	47,874		$	205,992

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

7

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 1: Summary of Significant Accounting Policies

As permitted by the rules of the Securities and Exchange Commission applicable to Quarterly Reports on Form 10-Q, these notes are condensed and do not contain all disclosures required by generally accepted accounting principles (GAAP). 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, 2012.

In the opinion of the management of Cognex Corporation (the “Company”), the accompanying consolidated unaudited financial statements contain all adjustments, consisting of normal, recurring adjustments and financial statement reclassifications necessary to present fairly the Company’s financial position as of June 30, 2013, and the results of its operations for the three-month and six-month periods ended June 30, 2013 and July 1, 2012, 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 six-month periods ended June 30, 2013 are not necessarily indicative of the results to be expected for the full year.

NOTE 2: New Pronouncements

Accounting Standards Update (ASU) 2013-02, “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income”

The amendments in ASU 2013-02 require companies to present information about amounts reclassified out of accumulated other comprehensive income (OCI) to net income, by component. The effect of significant reclassification adjustments being made out of accumulated OCI on the corresponding line items in net income must be presented when the item is reclassified in its entirety during one reporting period. While the new guidance in ASU 2013-12 changes the presentation of accumulated OCI, there are no changes to the components that are recognized in net income or OCI under current accounting guidance.

Amounts reclassified from accumulated other comprehensive income to investment income on the Consolidated Statements of Operations were realized gains of $52,000 and $83,000 during the three-month and six-month periods ended June 30, 2013, respectively, and realized gains of $977,000 and $1,071,000 during the three-month and six-month periods ended July 1, 2012, respectively.

Accounting Standards Update (ASU) 2013-11, “Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists”

The amendments in ASU 2013-11 require companies to present an unrecognized tax benefit, or a portion thereof, as a reduction to a deferred tax asset for a net operating loss (NOL) carryforward or a similar tax loss or tax credit carryforward, unless the uncertain tax position is not available to reduce, or would not be used to reduce, the NOL or carryforward under the tax law in the same jurisdiction; otherwise, the unrecognized tax benefit should be presented as a gross liability and should not net the unrecognized tax benefit with a deferred tax asset. As the Company does not currently have any NOL carryforwards, this guidance will most likely apply to research and development tax credit carryforwards. ASU 2013-11 is effective for annual periods beginning after December 15, 2013 and should be applied to all unrecognized tax benefits that exist as of the effective date. Companies may choose to apply this guidance retrospectively to each prior reporting period presented. Management is the process of evaluating the impact of this Update.

8

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 June 30, 2013 (in thousands):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)
Assets:
Cash equivalents	$	12,947	$	—
Corporate stock		1,669		—
Money market instruments		460		—
Corporate bonds		—		190,166
Asset-backed securities		—		68,176
Treasury bills		—		52,415
Sovereign bonds		—		30,435
Municipal bonds		—		28,583
Commercial paper		—		3,000
Agency bonds		—		1,498
Currency forward contracts		—		61
Liabilities:
Currency forward contracts		—		11

The Company’s cash equivalents and 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 investments. The Company’s corporate stock position is reported at fair value based upon quoted market prices on a stock exchange, and is therefore classified as a Level 1 investment.

The Company’s debt securities and currency 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, and are therefore classified as Level 2 investments. 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 did not record an other-than-temporary impairment of these investments during the six-month period ended June 30, 2013.

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

The Company has an interest in a limited partnership, which is accounted for using the cost method and is required to be measured at fair value on a non-recurring basis. Management is responsible for estimating the fair value of this investment, and in doing so, considers valuations of the partnership’s investments as determined by the General Partner. Publicly-traded investments in active markets are reported at the market closing price less a discount, as appropriate, to reflect restricted marketability. Fair value for private investments for which observable market prices in active markets do not exist is based upon the best information available including the value of a recent financing, reference to observable valuation measures for comparable companies (such as revenue multiples), public or private transactions (such as the sale of a comparable company), and valuations for publicly-traded comparable companies. The valuations also

9

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

incorporate the General Partner’s own judgment and close familiarity with the business activities of each portfolio company. Significant increases or decreases in any of these inputs in isolation may result in a significantly lower or higher fair value measurement. The portfolio consists of securities of public and private companies, and consequently, inputs used in the fair value calculation are classified as Level 3. The Company did not record an other-than-temporary impairment of this asset during the six-month period ended June 30, 2013.

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

Non-financial assets such as goodwill, intangible assets, and property, plant, and equipment 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 six-month period ended June 30, 2013.

NOTE 4: Cash, Cash Equivalents, and Investments

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

	June 30, 2013		December 31, 2012
Cash	$	34,467	$	34,986
Cash equivalents		12,947		5,098
Money market instruments		460		5,076
Cash and cash equivalents		47,874		45,160
Corporate bonds		80,386		46,001
Asset-backed securities		26,910		17,666
Municipal bonds		14,443		16,224
Sovereign bonds		7,383		3,986
Commercial paper		3,000		—
Corporate stock		1,669		2,131
Agency bonds		1,498		7,482
Covered bonds		—		5,618
Treasury bills		—		5,997
Short-term investments		135,289		105,105
Corporate bonds		109,780		100,072
Treasury bills		52,415		36,276
Asset-backed securities		41,266		34,710
Sovereign bonds		23,052		10,606
Municipal bonds		14,140		17,846
Agency bonds		—		29,441
Covered bonds		—		5,564
Limited partnership interest (accounted for using cost method)		2,455		3,740
Long-term investments		243,108		238,255
	$	426,271	$	388,520

The Company’s investment portfolio includes corporate bonds, asset-backed securities, treasury bills, sovereign bonds, municipal bonds, commercial paper, and agency bonds. Corporate bonds consist of debt securities issued by both domestic and foreign companies; asset-backed securities consist of debt securities collateralized by pools of receivables or loans with credit enhancement; treasury bills consist of debt securities issued by both the U.S. and foreign governments; sovereign bonds consist of direct debt issued by foreign governments; municipal bonds consist of debt securities issued by state and local government

10

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

entities; commercial paper consists of debt instruments issued by corporations or financial institutions with high quality debt ratings; and agency bonds consist of domestic or foreign obligations of government agencies and government sponsored enterprises that have government backing.

During the fourth quarter of 2012, the Company purchased equity securities, representing stock in a publicly-traded U.S. company, with an aggregate fair value of $2,131,000 as of December 31, 2012. As of June 30, 2013, these securities had an aggregate fair value of $1,669,000, resulting in an unrealized loss of $462,000.

The following tables summarize the Company’s available-for-sale investments as of June 30, 2013 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Corporate bonds	$	80,547	$	119	$	(280	)	$	80,386
Asset-backed securities		27,076		6		(172	)		26,910
Municipal bonds		14,416		28		(1	)		14,443
Sovereign bonds		7,396		—		(13	)		7,383
Commercial paper		3,000		—		—			3,000
Agency bonds		1,498		—		—			1,498
Long-term:
Corporate bonds		109,785		373		(378	)		109,780
Treasury bills		52,487		—		(72	)		52,415
Asset-backed securities		41,539		6		(279	)		41,266
Sovereign bonds		23,199		17		(164	)		23,052
Municipal bonds		14,110		62		(32	)		14,140
	$	375,053	$	611	$	(1,391	)	$	374,273

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 June 30, 2013 (in thousands):

	Unrealized Loss Position For:
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	107,235	$	(658	)	$	—	$	—		$	107,235	$	(658	)
Sovereign bonds		23,007		(177	)		—		—			23,007		(177	)
Municipal bonds		5,846		(33	)		—		—			5,846		(33	)
Asset-backed securities		59,180		(449	)		1,570		(2	)		60,750		(451	)
Treasury bills		50,617		(72	)		—		—			50,617		(72	)
	$	245,885	$	(1,389	)	$	1,570	$	(2	)	$	247,455	$	(1,391	)

As of June 30, 2013, the Company did not recognize an 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, our 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 its effective maturity or market price recovery.

The Company recorded gross realized gains and gross realized losses on the sale of investments totaling $101,000 and $49,000, respectively, during the three-month period ended June 30, 2013, and $1,233,000 and $238,000, respectively, during the three-month period ended July 1, 2012. The Company recorded gross realized gains and gross realized losses on the sale of investments totaling $150,000 and $67,000, respectively, during the six-month period ended June 30, 2013, and $1,327,000 and $238,000, respectively, during the six-month period ended July 1, 2012.

11

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 June 30, 2013 (in thousands):

	<1 Year		1-2 Years		2-3 Years		3-4 Years		4-5 Years		Total
Corporate bonds	$	80,386	$	48,477	$	54,059	$	6,729	$	515	$	190,166
Asset-backed securities		26,910		35,072		6,194		—		—		68,176
Treasury bills		—		29,870		22,545		—		—		52,415
Sovereign bonds		7,383		11,263		10,907		—		882		30,435
Municipal bonds		14,443		8,817		2,337		2,491		495		28,583
Commercial paper		3,000		—		—		—		—		3,000
Agency bonds		1,498		—		—		—		—		1,498
	$	133,620	$	133,499	$	96,042	$	9,220	$	1,892	$	374,273

The Company is a Limited Partner in Venrock Associates III, L.P. (Venrock), a venture capital fund. The Company has committed to a total investment in the limited partnership of up to $20,500,000, with an expiration date of December 31, 2013. As of June 30, 2013, the Company contributed $19,886,000 to the partnership. The remaining commitment of $614,000 can be called by Venrock at any time before December 31, 2013. Distributions and contributions are at the discretion of Venrock’s management. No contributions were made during the six-month period ended June 30, 2013. The Company received a cash distribution of $1,285,000 during the second quarter of 2013, which was accounted for as a return of capital.

NOTE 5: Inventories

Inventories consisted of the following (in thousands):

	June 30, 2013		December 31, 2012
Raw materials	$	12,837	$	12,667
Work-in-process		3,947		4,193
Finished goods		9,869		9,322
	$	26,653	$	26,182

NOTE 6: Intangible Assets and Goodwill

The Company evaluates the possible impairment of goodwill and other intangible assets whenever events or circumstances indicate that the carrying value of these assets may not be recoverable. No triggering event occurred in the six-month period ended June 30, 2013 that would indicate a potential impairment of goodwill or other intangible assets. However, the Company continues to monitor a variety of factors that could result in an impairment of goodwill or other intangible assets in a future period.

NOTE 7: Warranty Obligations

The Company records the estimated cost of fulfilling product warranties at the time of sale based upon historical costs to fulfill claims. Obligations may also be recorded subsequent to the time of sale whenever specific events or circumstances impacting product quality become known that would not have been taken

12

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

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 obligations were as follows (in thousands):

Balance as of December 31, 2012	$	2,256
Provisions for warranties during the period		1,265
Fulfillment of warranty obligations		(990	)
Foreign exchange rate changes		(24	)
Balance as of June 30, 2013	$	2,507

NOTE 8: Contingencies

In May 2008, the Company filed a complaint against MvTec Software GmbH, MvTec LLC, and Fuji America Corporation in the United States District Court for the District of Massachusetts alleging infringement of certain patents owned by the Company. In April 2009 and again in June 2009, Defendant MvTec Software GmbH filed re-examination requests of the patents-at-issue with the United States Patent and Trademark Office. This matter is ongoing.

In May 2009, the Company pre-filed a complaint with the United States International Trade Commission (ITC) pursuant to Section 337 of the Tariff Act of 1930, as amended, 19 U.S.C. §1337, against MvTec Software GmbH, MvTec LLC, Fuji America, and several other respondents alleging unfair methods of competition and unfair acts in the unlawful importation into the United States, sale for importation, or sale within the United States after importation. By this filing, the Company requested the ITC to investigate the Company’s contention that certain machine vision software, machine vision systems, and products containing the same infringe, and respondents directly infringe and/or actively induce and/or contribute to the infringement in the United States, of one or more of the Company’s U.S. patents. In July 2009, the ITC issued an order that it would institute an investigation based upon the Company’s assertions. In September 2009, the Company reached a settlement with two of the respondents, and in December 2009, the Company reached a settlement with five additional respondents. In March 2010, the Company reached a settlement with respondent Fuji Machine Manufacturing Co., Ltd. and its subsidiary Fuji America Corporation. These settlements did not have a material impact on the Company’s financial results. An ITC hearing was held in May 2010. In July 2010, the Administrative Law Judge issued an initial determination finding two of the Company’s patents invalid and that respondents did not infringe the patents-at-issue. In September 2010, the ITC issued a notice that it would review the initial determination of the Administrative Law Judge. The ITC issued its Final Determination in November 2010 in which it determined to modify-in-part and affirm-in-part the Administrative Law Judge’s determination, and terminate the investigation with a finding of no violation of Section 337 of the Tariff Act of 1930 (as amended 19 U.S.C. §1337). The Company has filed an appeal of the decision with the United States Court of Appeals for the Federal Circuit. An oral hearing before the United States Court of Appeals occurred in February 2012. This matter is ongoing.

In March 2013, the Company filed a lawsuit against Microscan Systems, Inc. (“Microscan”) and Code Corporation in the United States District Court for the Southern District of New York alleging that Microscan’s Mobile Hawk handheld imager infringes U.S. Patent 7,874,487 owned by the Company. The lawsuit seeks to prohibit Code Corporation from manufacturing the product, and Microscan from selling and distributing the product. The Company is also seeking monetary damages resulting from the alleged infringement. In April 2013, Microscan filed ex parte re-examination requests of the patent-at-issue with the United States Patent and Trademark Office. These matters are ongoing.

13

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The Company cannot predict the outcome of the above-referenced pending matters and an adverse resolution of these lawsuits could have a material adverse effect on the Company’s financial position, liquidity, results of operations, and/or indemnification obligations. In addition, various other 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 incidental 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.

NOTE 9: Indemnification Provisions

Except as limited by Massachusetts law, the by-laws of the Company require it to indemnify certain current or former directors, officers, and employees of the Company against expenses incurred by them in connection with each proceeding in which he or she is involved as a result of serving or having served in certain capacities. Indemnification is not available with respect to a proceeding as to which it has been adjudicated that the person did not act in good faith in the reasonable belief that the action was in the best interests of the Company. The maximum potential amount of future payments the Company could be required to make under these provisions is unlimited. The Company has never incurred significant costs related to these indemnification provisions. As a result, the Company believes the estimated fair value of these provisions is minimal.

In the ordinary course of business, the Company may accept standard limited indemnification provisions in connection with the sale of its products, whereby it indemnifies its customers for certain direct damages incurred in connection with third-party patent or other intellectual property infringement claims with respect to the use of the Company’s products. The term of these indemnification provisions generally coincides with the customer’s use of the Company’s products. The maximum potential amount of future payments the Company could be required to make under these provisions is generally subject to fixed monetary limits. The Company has never incurred significant costs to defend lawsuits or settle claims related to these indemnification provisions. As a result, the Company believes the estimated fair value of these provisions is minimal.

In the ordinary course of business, the Company also accepts limited indemnification provisions from time to time, whereby it indemnifies customers for certain direct damages incurred in connection with bodily injury and property damage arising from the installation of the Company’s products. The term of these indemnification provisions generally coincides with the period of installation. The maximum potential amount of future payments the Company could be required to make under these provisions is generally limited and is likely recoverable under the Company’s insurance policies. As a result of this coverage, and the fact that the Company has never incurred significant costs to defend lawsuits or settle claims related to these indemnification provisions, the Company believes the estimated fair value of these provisions is minimal.

NOTE 10: Derivative Instruments

The Company is exposed to certain risks relating to its ongoing business operations including foreign currency exchange rate risk and interest rate risk. The Company currently mitigates certain foreign currency exchange rate risks with derivative instruments. The Company does not currently manage its interest rate risk with derivative instruments.

The Company faces exposure to foreign currency exchange rate fluctuations, as a significant portion of its revenues, expenses, assets, and liabilities are denominated in currencies other than the functional currencies of the Company’s subsidiaries or the reporting currency of the Company, which is the U.S. Dollar. The Company faces two types of foreign currency exchange rate exposures:

• Transactional currency/functional currency exchange rate exposures from transactions that are denominated in currencies other than the functional currency of the subsidiary. These transactions gains and losses are reported on the Consolidated Statements of Operations as a component of “Foreign Currency Gain (Loss),”

• Functional currency/reporting currency exchange rate exposures from the revaluation of the assets and liabilities of our foreign subsidiaries, whose functional currency is generally their local currency, to the Company’s reporting currency, which is the U.S. Dollar. The net effect of these translation gains and losses are reported in “Accumulated Other Comprehensive Loss” on the Consolidated Balance Sheets, and also on the Consolidated Statements of Comprehensive Income.

14

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

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. Derivative instruments, specifically foreign currency forward contracts with maturities of up to three months, are used to manage the exposure to fluctuations in foreign currency exchange rates that arise primarily from foreign-denominated receivables and payables. As of June 30, 2013, the Company’s forward contracts do not qualify for effective hedge accounting. Because forward contracts are used as an economic hedge, any gain or loss on the underlying foreign-denominated balance is intended to be offset by the loss or gain on the forward contract. Gains and losses on forward contracts and foreign-denominated receivables and payables are included in “Foreign Currency Gain (Loss)” on the Consolidated Statements of Operations. The Company recorded net foreign currency gains of $76,000 and $139,000 in the three-month and six-month periods ended June 30, 2013, respectively, and net foreign currency losses of $30,000 and $668,000 in the three-month and six-month periods ended July 1, 2012, respectively.

As of June 30, 2013, the Company had the following outstanding forward contracts that were entered into to mitigate foreign currency exchange rate risk (in thousands):

Currency	Notional Value		USD Equivalent
Japanese Yen		316,600	$	3,214
Korean Won		275,000		240
Hungarian Forint		99,500		436
Taiwanese Dollar		27,500		920
Swedish Krona		5,700		848
Singapore Dollar		2,500		1,968
British Pound		425		654

Information regarding the fair value of the forward contracts outstanding as of June 30, 2013 and December 31, 2012 was as follows (in thousands):

	Asset Derivatives					Liability Derivatives
		Fair Value					Fair Value
	Balance Sheet Location	June 30, 2013		December 31, 2012		Balance Sheet Location	June 30, 2013		December 31, 2012
Foreign currency forward contracts	Prepaid expenses and other current assets	$	61	$	44	Accrued expenses	$	11	$	14

15

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

Information regarding the effect of the forward contracts, net of the underlying exposure, on the Consolidated Statements of Operations for the three-month and six-month periods ended June 30, 2013 and July 1, 2012 was as follows (in thousands):

		Amount of Gain Recognized					Amount of Gain  (Loss) Recognized
		Three-months ended					Six-months ended
	Location of Gain Recognized	June 30, 2013		July 1, 2012		Location of Gain (Loss) Recognized	June 30, 2013		July 1, 2012
Foreign currency forward contracts	Foreign currency gain	$	64	$	198	Foreign currency gain (loss)	$	197	$	(91	)

NOTE 11: Stock-Based Compensation Expense

The Company’s share-based payments that result in compensation expense consist solely of stock option grants. As of June 30, 2013, the Company had 5,614,591 shares available for grant under two stock option plans: the 2001 General Stock Option Plan (4,355,481) and the 2007 Stock Option and Incentive Plan (1,259,110). Each of these plans expires ten years from the date the plan was approved. In December 2011, the 2001 General Stock Option Plan received shareholder approval for an amendment and restatement of the plan, extending the plan until September 2021. Generally, stock options are granted with an exercise price equal to the market value of the Company’s common stock at the grant date, vest over four years based upon continuous service, and expire ten years from the grant date.

The following table summarizes the Company’s stock option activity for the six-month period ended June 30, 2013:

	Shares (in  thousands)			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2012		3,559		$	25.56
Granted		823			42.12
Exercised		(710	)		22.88
Forfeited or expired		(122	)		32.53
Outstanding as of June 30, 2013		3,550		$	29.70		7.4	$	55,132
Exercisable as of June 30, 2013		1,309		$	23.03		5.8	$	29,075
Options vested or expected to vest at June 30, 2013 (1)		3,139		$	28.93		7.3	$	51,172

(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.

16

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

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

	Three-months Ended						Six-months Ended
	June 30, 2013			July 1, 2012			June 30, 2013			July 1, 2012
Risk-free rate		2.0	%		2.0	%		2.0	%		2.0	%
Expected dividend yield		0	%		1.2	%		0	%		1.2	%
Expected volatility		42	%		44	%		42	%		44	%
Expected term (in years)		5.9			5.7			5.9			5.7

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. However, in the fourth quarter of 2012, the Company paid the full annual dividends for 2013 and 2014 in advance, and therefore, the dividend yield for those years has been adjusted to zero. At the time of the 2013 valuation, a dividend yield of 1.04% was estimated for future periods from 2015 through the expected life of the option.

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 weighted-average grant-date fair values of stock options granted during the three-month periods ended June 30, 2013 and July 1, 2012 were $16.13 and $13.50, respectively. The weighted-average grant-date fair values of stock options granted during the six-month periods ended June 30, 2013 and July 1, 2012 were $16.13 and $13.35, respectively.

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 71% of its stock options granted to senior management and 69% of its options granted to all other employees will actually vest. Therefore, the Company currently applies an estimated forfeiture rate of 12% to all unvested options for senior management and a rate of 13% for all other employees.

The total stock-based compensation expense and the related income tax benefit recognized for the three-month period ended June 30, 2013 were $2,781,000 and $911,000, respectively, and for the three-month period ended July 1, 2012 were $1,989,000 and $646,000, respectively. The total stock-based compensation expense and the related income tax benefit recognized for the six-month period ended June 30, 2013 were $6,079,000 and $2,004,000, respectively, and for the six-month period ended July 1, 2012 were $5,303,000 and $1,733,000, respectively. No compensation expense was capitalized as of June 30, 2013 or December 31, 2012.

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

	Three-months Ended				Six-months Ended
	June 30, 2013		July 1, 2012		June 30, 2013		July 1, 2012
Product cost of revenue	$	177	$	135	$	404	$	375
Service cost of revenue		47		40		110		108
Research, development, and engineering		650		483		1,463		1,350
Selling, general, and administrative		1,907		1,331		4,102		3,470
	$	2,781	$	1,989	$	6,079	$	5,303

17

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The total intrinsic values of stock options exercised for the three-month periods ended June 30, 2013 and July 1, 2012 were $6,759,000 and $672,000, respectively. The total intrinsic values of stock options exercised for the six-month periods ended June 30, 2013 and July 1, 2012 were $13,952,000 and $13,308,000, respectively. The total fair values of stock options vested for the three-month periods ended June 30, 2013 and July 1, 2012 were $2,298,000 and $2,286,000, respectively. The total fair values of stock options vested for the six-month periods ended June 30, 2013 and July 1, 2012 were $9,230,000 and $8,686,000, respectively.

As of June 30, 2013, total unrecognized compensation expense related to non-vested stock options was $12,233,000, which is expected to be recognized over a weighted-average period of 1.6 years.

NOTE 12: Stock Repurchase Program

In April 2008, the Company’s Board of Directors authorized the repurchase of up to $50,000,000 of the Company’s common stock, primarily as a means to reduce the dilutive effect of employee stock options. As of June 30, 2013, the Company had repurchased a total of 1,643,875 shares at a cost of $41,891,000 under this program, including 268,000 shares at a cost of $11,891,000 in the second quarter of 2013. In November 2011, the Company’s Board of Directors authorized the repurchase of up to $80,000,000 of the Company’s common stock to help reduce share dilution associated with equity incentive plans. This new authorization will commence once the Company completes the $50,000,000 program noted above, of which $8,109,000 remains available. The Company may repurchase shares under these programs in future periods depending upon a variety of factors, including, among other things, stock price, share availability, and cash requirements.

NOTE 13: Taxes

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

	Three-months Ended						Six-months Ended
	June 30, 2013			July 1, 2012			June 30, 2013			July 1, 2012
Income tax at federal statutory rate		35	%		35	%		35	%		35	%
State income taxes, net of federal benefit		2			1			2			1
Foreign tax rate differential		(17	)		(15	)		(17	)		(15	)
2013 research and development credit		(1	)		—			(1	)		—
Discrete event - 2012 research and development credit		—			—			(1	)		—
Income tax provision		19	%		21	%		18	%		21	%

During the six-month period ended June 30, 2013, the Company recorded a $918,000 increase in liabilities, net of deferred tax benefit, for uncertain tax positions that were recorded as income tax expense, of which $274,000 was recorded in the three-month period ended June 30, 2013. Estimated interest and penalties included in these amounts totaled $76,000 for the six-month period ended June 30, 2013, of which $38,000 was recorded in the three-month period ended June 30, 2013.

The effective tax rate for the six-month period ended June 30, 2013 includes a discrete event recorded in the first quarter of 2013 for the retroactive application of the 2012 research and development credit. The American Taxpayer Relief Act of 2012 was passed by Congress and signed into law on January 1, 2013. The provisions under this law are to be applied retroactively to January 1, 2012. As a result of the law being signed on January 1, 2013, the financial impact of the retroactive provision was recorded as a discrete event in the first quarter of 2013. The Company recorded a reduction to tax expense in the first quarter of 2013 of $555,000, net of related reserves for uncertain tax positions, for the aforementioned research and development tax credit. Excluding this discrete event, the effective tax rate for the six-month period ended June 30, 2013 was 19%. There were no discrete events in the three-month period ended June 30, 2013 or in the six-month period ended July 1, 2012.

18

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The Company’s reserve for income taxes, including gross interest and penalties, was $6,255,000 as of June 30, 2013, all of which was classified as noncurrent. The amount of gross interest and penalties included in these balances was $1,303,000. 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, less $405,000 that would be recorded through additional paid in capital. 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 $1,600,000 to $1,800,000 over the next twelve months.

The Company has defined its major tax jurisdictions as the United States, Ireland, China, and Japan, and within the United States, Massachusetts and California. Within the United States, the tax years 2006 through 2012 remain open to examination by various taxing authorities due to a 2009 carryback claim, while the tax years 2008 through 2012 remain open to examination by various taxing authorities in other jurisdictions in which the Company operates. The Company has recently been notified by the Internal Revenue Service that its U.S. Federal tax returns for years 2010 and 2011 are under audit. The Company believes it is adequately reserved for these years.

NOTE 14: Weighted-Average Shares

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

	Three-months Ended				Six-months Ended
	June 30, 2013		July 1, 2012		June 30, 2013		July 1, 2012
Basic weighted-average common shares outstanding		43,522		42,851		43,392		42,710
Effect of dilutive stock options		835		750		859		889
Weighted-average common and common-equivalent shares outstanding		44,357		43,601		44,251		43,599

Stock options to purchase 819,407 and 634,643 shares of common stock, on a weighted-average basis, were outstanding during the three-month and six-month periods ended June 30, 2013, respectively, and 931,839 and 872,237 for the same periods in 2012, but were not included in the calculation of dilutive net income per share because they were anti-dilutive.

NOTE 15: Segment Information

The Company has two reportable segments: the Modular Vision Systems Division (MVSD) and the Surface Inspection Systems Division (SISD). MVSD develops, manufactures, and markets modular vision systems that are used to control the manufacture of discrete items by locating, identifying, inspecting, and measuring them during the manufacturing process. SISD develops, manufactures, and markets surface inspection vision systems that are used to inspect surfaces of materials processed in a continuous fashion, such as metals, paper, nonwoven, plastics, and glass, to ensure there are no flaws or defects on the surfaces. Segments are determined based upon the way that management organizes its business for making operating decisions and assessing performance. The Company evaluates segment performance based upon income or loss from operations, excluding stock-based compensation expense.

19

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The following table summarizes information about the segments (in thousands):

Three-months Ended June 30, 2013	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	72,012	$	7,686	$	—		$	79,698
Service revenue		2,301		4,511		—			6,812
Operating income		23,527		2,227		(5,581	)		20,173

Six-months Ended June 30, 2013	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	140,331	$	14,039	$	—		$	154,370
Service revenue		4,393		8,639		—			13,032
Operating income		45,603		3,959		(11,408	)		38,154

Three-months Ended July 1, 2012	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	69,743	$	8,706	$	—		$	78,449
Service revenue		1,778		4,099		—			5,877
Operating income		25,035		2,848		(4,533	)		23,350

Six-months Ended July 1, 2012	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	133,964	$	15,892	$	—		$	149,856
Service revenue		3,698		8,481		—			12,179
Operating income		46,179		5,240		(10,328	)		41,091

Reconciling items consist of stock-based compensation expense and unallocated corporate expenses, which primarily include corporate headquarters costs, professional fees, and patent infringement litigation. Additional asset information by segment is not produced internally for use by the chief operating decision maker, and therefore, is not presented. Additional asset information is not provided because cash and investments are commingled and the segments share assets and resources in a number of locations around the world.

NOTE 16: Subsequent Event

On July 29, 2013 the Company’s Board of Directors declared a two-for-one split of its common stock. The split will be effected in the form of a stock dividend, payable on September 16, 2013 to shareholders of record on August 26, 2013.

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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, expected areas of growth, future product mix, research and development activities, 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) current and future conditions in the global economy; (2) the cyclicality of the semiconductor and electronics industries; (3) the reliance on revenue from the automotive industry; (4) the inability to penetrate new markets; (5) the inability to achieve significant international revenue; (6) fluctuations in foreign currency exchange rates; (7) the loss of a large customer; (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; (19) exposure to additional tax liabilities; and (20) information security breaches or business system disruptions. 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, 2012. 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. Our Modular Vision Systems Division (MVSD) specializes in machine vision systems that are used to automate the manufacture of discrete items, while our Surface Inspection Systems Division (SISD) specializes in machine vision systems that are used to inspect the surfaces of materials processed in a continuous fashion.

In addition to product revenue derived from the sale of machine vision systems, the Company also generates revenue by providing maintenance and support, training, consulting, and installation services to its customers. Our customers can be classified into three primary markets: factory automation, semiconductor and electronics capital equipment, and surface inspection.

• Factory automation customers, who are included in the Company’s MVSD segment, purchase Cognex vision products and incorporate them into their manufacturing processes. Virtually every manufacturer can achieve better quality and manufacturing efficiency by using machine vision, and therefore, this market includes a broad base of customers across a variety of industries, including automotive, consumer electronics, food and beverage, pharmaceutical, and medical devices. The factory automation market also includes customers who purchase Cognex vision products for use outside of the assembly process, such as using ID products in logistics automation for package sorting and distribution. Sales to factory automation customers represented 78% of total revenue in the second quarter of 2013.

21

• Semiconductor and electronics capital equipment manufacturers, who are included in the Company’s MVSD segment, purchase Cognex vision 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. Demand from these capital equipment manufacturers has historically been highly cyclical, with periods of investment followed by downturn. Sales to semiconductor and electronics capital equipment manufacturers represented 8% of total revenue in the second quarter of 2013.

• Surface inspection customers, who comprise the Company’s SISD segment, are manufacturers of materials processed in a continuous fashion, such as metals, paper, nonwoven, plastics, and glass. These customers need sophisticated machine vision to detect, classify, and analyze defects on the surfaces of those materials as they are being processed at high speeds. Surface inspection sales represented 14% of total revenue in the second quarter of 2013.

Revenue for the second quarter of 2013 totaled $86,510,000, representing an increase of $2,184,000, or 3%, from the same period in the prior year driven by higher sales to customers in the factory automation market. Gross margin was 76% of revenue in both the second quarters of 2013 and 2012. Operating expenses increased by $4,760,000, or 12%, from the second quarter of 2012 due primarily to expenses associated with increased engineering and sales headcount in strategic areas, higher company bonus accruals, and higher stock-based compensation expense. As a result of these strategic investments, which management believes will fuel longer-term revenue growth, the Company recorded operating income of $20,173,000, or 23% of revenue, in the second quarter of 2013, compared to operating income of $23,350,000, or 28% of revenue, in the second quarter of 2012. Lower investment income, due to gains recorded on the sale of Euro-denominated securities during the second quarter of 2012 that did not repeat, and a lower effective tax rate resulted in net income of $16,820,000, or 19% of revenue, in the second quarter of 2013, compared to net income of $19,767,000, or 23% of revenue, in the second quarter of 2012. Net income per diluted share was $0.38 in the second quarter of 2013, compared to $0.45 in the second quarter of 2012.

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 $2,184,000, or 3%, for the three-month period in 2013 compared to the same period in 2012, and increased by $5,367,000, or 3%, for the six-month period in 2013 compared to the same period in 2012. The increase in revenue for both periods was due to higher sales to factory automation customers, partially offset by lower sales to surface inspection and semiconductor and electronics capital equipment customers.

Factory Automation Market

Sales to customers in the factory automation market represented 78% of total revenue for both the three-month and six-month periods in 2013, respectively, compared to 73% and 75% for the same periods in 2012. Sales to these customers increased by $5,515,000, or 9%, for the three-month period and increased by $9,497,000, or 8%, for the six-month period. A weaker Japanese Yen in 2013 compared to the prior year had

22

a negative impact on reported factory automation revenue, as sales denominated in Yen were translated to U.S. Dollars at a lower rate. Excluding the impact of foreign currency exchange rate changes on revenue, sales to factory automation customers increased by $6,738,000, or 11%, for the three-month period and increased by $11,277,000, or 9%, for the six-month period.

Geographically, increases for both the three-month and six-month periods were noted across all major regions except for Japan. However, excluding the impact of foreign currency exchange rate changes, the Japanese market was relatively flat compared to both the three-month and six-month periods of 2012. Revenue in Japan had declined in both 2011 and 2012 since the natural disasters that hit this region early in 2011. In both the three-month and six-month periods, the largest percentage increases were noted in Asia where the Company has made significant investments, particularly in China, to expand its sales and support infrastructure in order to access more of the machine vision market in this high-potential growth region. By product line, the largest increase from the prior year in both the three-month and six-month periods came from sales of the Company’s ID Products, which are used in manufacturing applications as well as in the logistics industry for package sorting and distribution. The Company expects its Asia region and its ID Products business to provide growth opportunities in the second half of 2013.

Sales to factory automation customers increased by $3,789,000, or 6%, from the first quarter of 2013, with the largest increase coming from Asia. Management expects factory automation revenue to continue to grow in the third quarter as compared to the second quarter despite historical seasonal softness that can impact revenue levels during the summer months.

Semiconductor and Electronics Capital Equipment Market

Sales to customers who make automation equipment for the semiconductor and electronics industries represented 8% of total revenue for both the three-month and six-month periods in 2013, respectively, compared to 12% and 10% for the same periods in 2012. Sales to these customers decreased by $2,723,000, or 28%, for the three-month period and decreased by $2,435,000, or 15%, for the six-month period. Excluding the impact of foreign currency exchange rate changes, which primarily relates to the Japanese Yen, sales to semiconductor and electronics capital equipment customers decreased by $2,305,000, or 24%, for the three-month period and decreased $1,773,000, or 11%, for the six-month period.

Although sales to these customers increased by $113,000, or 2%, from the first quarter of 2013, representing the second sequential quarter of sales growth, the semiconductor and electronics capital equipment market has historically been highly cyclical and management has limited visibility regarding future order levels from these customers.

Surface Inspection Market

Sales to customers in the surface inspection market represented 14% of total revenue for both the three-month and six-month periods in 2013, compared to 15% for both the three-month and six-month periods in 2012. Revenue from these customers decreased by $608,000, or 5%, for the three-month period and decreased by $1,695,000, or 7%, for the six-month period. Excluding the impact of foreign currency exchange rate changes, which primarily relates to the Japanese Yen, sales to surface inspection customers increased by $132,000, or 1%, for the three-month period and decreased by $738,000, or 3%, for the six-month period due to lower product revenue. Revenue from the surface inspection market increased by $1,716,000, or 16%, from the first quarter of 2013. The revenue reported each quarter can vary significantly depending upon the timing of customer orders, system deliveries, and installations, as well as the impact of revenue deferrals. Management expects surface inspection revenue to grow in the second half of 2013 as compared to the first half.

Product Revenue

Product revenue increased by $1,249,000, or 2%, for the three-month period and increased by $4,514,000, or 3%, for the six-month period. These increases were driven by a higher volume of modular vision systems sold than in the prior year, partially offset by a lower average selling price due to the shift in revenue mix to ID Products, which have relatively lower average selling prices. We expect this trend related to ID products to continue throughout 2013. Higher MVSD product revenue was partially offset by lower SISD product revenue.

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Service Revenue

Service revenue, which is derived from the sale of maintenance and support, training, consulting, and installation services, increased by $935,000, or 16%, for the three-month period and increased by $853,000, or 7%, for the six-month period. The increases for both periods were primarily due to higher revenue from MVSD consulting services. Service revenue as a percentage of total revenue was 8% for both the three-month and six-month periods of 2013 compared to 7% for both the three-month and six-month periods in 2012.

Gross Margin

Gross margin as a percentage of revenue was 76% for all periods presented.

MVSD Margin

MVSD gross margin as a percentage of revenue was 80% and 79% for the three-month and six-month periods in 2013, respectively, compared to 80% for both the three-month and six-month periods in 2012. In the six-month period, the reduction in margin was due to higher new product introduction costs and higher provisions for warranty and for excess and obsolete inventory, partially offset by improvements in consulting service margins.

SISD Margin

SISD gross margin as a percentage of revenue was 52% and 53% for the three-month and six-month periods in 2013, respectively, compared to 51% and 52% for the same periods in 2012. The increase in SISD margin for the three-month and six-month periods was due to improvements in installation service margins.

Product Margin

Product gross margin as a percentage of revenue was 78% for all periods presented. A reduction in MVSD product margins due to higher new product introduction costs and higher provisions for warranty and for excess and obsolete inventory was offset by a favorable shift in revenue mix to relatively higher-margin MVSD products.

Service Margin

Service gross margin as a percentage of revenue was 52% for both the three-month and six-month periods in 2013, compared to 50% and 47% for the same periods in 2012. The increase in service margin for the three-month and six-month periods was due to improvements in MVSD consulting service margins, as well as improved installation service margins at SISD.

Research, Development, and Engineering Expenses

Research, development, and engineering (RD&E) expenses increased by $1,587,000, or 15%, for the three-month period in 2013 compared to the same period in 2012, and increased by $2,547,000, or 12%, for the six-month period in 2013 compared to the same period in 2012. MVSD RD&E expenses increased by $1,528,000, or 16%, for the three-month period and increased by $2,445,000, or 13%, for the six-month period, while SISD RD&E expenses increased by $59,000, or 6%, for the three-month period and increased by $102,000, or 5%, for the six-month period.

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The table below details the $1,528,000 and the $2,445,000 net increases in MVSD RD&E for the three-month and six-month periods, respectively (in thousands):

	Three-month Period		Six-month Period
MVSD RD&E expenses in 2012	$	9,317	$	18,763
Personnel-related costs		892		1,742
Company bonus accruals		293		405
Stock-based compensation expense		159		101
Other		184		197
MVSD RD&E expenses in 2013	$	10,845	$	21,208

The increase in MVSD RD&E expenses was primarily due to headcount additions, resulting in higher personnel-related costs, such as salaries and fringe benefits. In addition, the Company recorded higher company bonus accruals and increased stock-based compensation expense due to a higher valuation of stock options granted in the first quarter of 2013.

The increase in SISD RD&E expenses was primarily due to higher spending on materials for new product development ($57,000 in the three-month period and $78,000 in the six-month period).

RD&E expenses as a percentage of revenue were 14% for both the three-month and six-month periods in 2013, compared to 12% and 13% for the three-month and six-month periods in 2012, respectively. We believe that a continued commitment to RD&E activities is essential in order to maintain or achieve product leadership with our existing products and to provide innovative new product offerings. In addition, we consider our ability to accelerate time to market for new products to be critical to our revenue growth. Therefore, we expect to continue to make significant RD&E investments in the future, and we target our RD&E spending to be between 10% and 15% of revenue.

Selling, General, and Administrative Expenses

Selling, general, and administrative (SG&A) expenses increased by $3,173,000, or 11%, for the three-month period in 2013 compared to the same period in 2012, and increased by $4,791,000, or 8%, for the six-month period in 2013 compared to the same period in 2012. MVSD SG&A expenses increased by $2,246,000, or 9%, for the three-month period and increased by $3,588,000, or 7%, for the six-month period, while SISD SG&A expenses increased by $313,000, or 11%, for the three-month period and increased by $466,000, or 8%, for the six-month period. Corporate expenses that are not allocated to either division increased by $614,000, or 20%, for the three-month period and increased by $737,000, or 11%, for the six-month period.

The table below details the $2,246,000 and the $3,588,000 net increases in MVSD SG&A for the three-month and six-month periods, respectively (in thousands):

	Three-month Period			Six-month Period
MVSD SG&A expenses in 2012	$	24,202		$	48,350
Personnel-related costs		686			1,494
Sales commissions		670			823
Depreciation expense		219			484
Company bonus accruals		281			397
Sales demonstration equipment		160			384
Recruiting costs		226			311
Stock-based compensation expense		188			137
Foreign currency exchange rate changes		(697	)		(989	)
Other		513			547
MVSD SG&A expenses in 2013	$	26,448		$	51,938

Personnel-related costs have increased from the prior year due to additional headcount, and to a lesser extent, higher average costs per employee. Over the past year, the Company has continued to increase headcount in strategic areas, principally Sales, resulting in higher personnel-related costs, such as salaries, fringe benefits, commissions, and travel expenses. Average costs per employee have increased over the prior year due primarily to modest wage increases granted early in 2013 and higher fringe benefits, such as health care costs. The Company also recorded higher expenses related to sales commissions resulting from higher business levels, depreciation expense related principally to business system upgrades, company bonus accruals, sales demonstration equipment, recruiting costs, and stock-based compensation expense due to a higher stock price valuation for options granted in the first quarter of 2013. These increases were offset by the favorable impact of a weaker Japanese Yen in 2013 compared to the prior year, as expenses denominated in Yen were translated to U.S. Dollars at a lower rate.

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The increase in SISD SG&A expenses was primarily due to higher salaries and fringe benefits expenses ($280,000 for the three-month period and $506,000 for the six-month period).

The increase in corporate expenses was primarily related to higher company bonus accruals ($250,000 for the three-month period and $419,000 for the six-month period) and increased stock-based compensation expense due to a higher valuation of stock options granted in the first quarter of 2013 ($358,000 in the three-month period and $434,000 in the six-month period).

Nonoperating Income (Expense)

The Company recorded foreign currency gains of $76,000 and $139,000 for the three-month and six-month periods in 2013, respectively, compared to foreign currency losses of $30,000 and $668,000 for the three-month and six-month periods of 2012, respectively. The foreign currency gains and losses in each period resulted primarily from the revaluation and settlement of accounts receivable and intercompany balances that are reported in one currency and collected in another. Although a portion of the Company’s foreign currency exposure of accounts receivable is mitigated through the use of forward contracts, this program depends upon forecasts of sales and collections, and therefore, gains or losses on the underlying receivables may not perfectly offset losses or gains on the contracts.

Investment income decreased by $1,027,000, or 57%, for the three-month period in 2013 compared to the same period in 2012, and decreased by $1,607,000, or 58%, for the six-month period in 2013 compared to the same period in 2012. In the second quarter of 2012, the Company liquidated its Euro-denominated investment portfolio resulting in $1,071,000 of net gains recorded on the sale of these investments. These funds were reinvested in U.S. Dollar-denominated securities during the third quarter of 2013. The remaining decline for the six-month period was primarily due to a $462,000 unrealized loss recorded in current operations on a corporate stock holding designated as a trading security. The majority of this loss was recorded in the first quarter of 2013.

The Company recorded other expense, net of other income, of $257,000 and $140,000 for the three-month and six-month periods in 2013, respectively, compared to other expense of $99,000 and $96,000 for the same periods in 2012. The Company recorded $354,000 and $141,000 of other income in the first quarters of 2013 and 2012, respectively, due to the expiration of the statutes of limitations relating to tax holidays, during which time the Company collected value-added taxes from customers that were not required to be remitted to the government authority. Other income (expense) also includes rental income, net of associated expenses, from leasing buildings adjacent to the Company’s corporate headquarters. More of this space was unoccupied in 2013.

Income Tax Expense

The Company’s effective tax rate was 19% and 18% for the three-month and six-month periods in 2013, respectively, compared to 21% for both the three-month and six-month periods in 2012. The effective tax rate for the six-month period in 2013 was impacted by one discrete event in the first quarter of 2013 related to the retroactive application of the 2012 R&D credit passed by Congress under the American Taxpayer Relief Act of 2012, which reduced tax expense by $555,000. Although the provisions under this law were made retroactive to January 1, 2012, the law was signed on January 1, 2013, and therefore, the financial impact of any retroactive provision has been recorded as a discrete event in the first quarter of 2013. Excluding this discrete event, the effective tax rate for the six-month period in 2013 was 19%. There were no discrete events in the six-month period in 2012. In addition to the discrete event discussed above, the remaining decrease in the effective tax rate was primarily due to a higher proportion of pre-tax income earned in lower tax jurisdictions.

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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, cash equivalent, and investment balance of $426,271,000 as of June 30, 2013. 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 six months ended June 30, 2013 were met with its existing cash balances, cash from investment maturities, positive cash flows from operations, and the proceeds from stock option exercises. Cash requirements primarily consisted of operating activities, purchases of investments, the Company’s stock repurchase program, and capital expenditures. Capital expenditures for the six months ended July 1, 2012 totaled $4,310,000 and consisted primarily of expenditures for computer hardware and software, as well as manufacturing test equipment related to new product introductions.

The Company is a Limited Partner in Venrock Associates III, L.P. (Venrock), a venture capital fund. The Company has committed to a total investment in the limited partnership of up to $20,500,000, with the commitment period expiring on December 31, 2013. The Company does not have the right to withdraw from the partnership prior to December 31, 2013. As of June 30, 2013, the Company had contributed $19,886,000 to the partnership. The remaining commitment of $614,000 can be called by Venrock in any period through December 31, 2013. Distributions and contributions are at the discretion of Venrock’s management. No contributions were made during the six months ended June 30, 2013. The Company received a cash distribution of $1,285,000 during the second quarter of 2013, which was accounted for as a return of capital.

Beginning in the third quarter of 2003, the Company’s Board of Directors had declared and paid a cash dividend in each quarter. In December 2012, the Company declared and paid an $0.11 dividend that would normally be declared in the first quarter of 2013 in conjunction with the 2012 earnings release. A special dividend of $1.00 was also declared and paid in the fourth quarter of 2012 to replace expected quarterly dividend declarations for the next eight quarters, beginning in 2013. The additional $0.11 dividend and the $1.00 dividend were accelerated due to the anticipated increase in the federal tax on dividends paid after December 31, 2012. Due to these accelerated payments, no dividends were declared or paid during the six months ended June 30, 2013. 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.

In April 2008, the Company’s Board of Directors authorized the repurchase of up to $50,000,000 of the Company’s common stock, primarily as a means to reduce the dilutive effect of employee stock options. As of June 30, 2013, the Company had repurchased 1,643,875 shares at a cost of $41,891,000 under this program, including 268,000 shares at a cost of $11,891,000 in the second quarter of 2013. In November 2011, the Company’s Board of Directors authorized the repurchase of up to $80,000,000 of the Company’s common stock to help reduce share dilution associated with equity incentive plans. This new authorization will commence once the Company completes the $50,000,000 program noted above, of which $8,109,000 remains available. The Company may repurchase shares under these programs in future periods depending upon a variety of factors, including, among other things, stock price, share availability, and cash requirements.

The Company believes that its existing cash, cash equivalent, 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 June 30, 2013, the Company had approximately $423,816,000 in cash, cash equivalents, debt securities, or equity securities that could be converted into cash. 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

Accounting Standards Update (ASU) 2013-11, “Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists”

The amendments in ASU 2013-11 require companies to present an unrecognized tax benefit, or a portion thereof, as a reduction to a deferred tax asset for a net operating loss (NOL) carryforward or a similar tax loss or tax credit carryforward, unless the uncertain tax position is not available to reduce, or would not be used to reduce, the NOL or carryforward under the tax law in the same jurisdiction; otherwise, the unrecognized tax benefit should be presented as a gross liability and should not net the unrecognized tax benefit with a deferred tax asset. As the Company does not currently have any NOL carryforwards, this guidance will most likely apply to research and development tax credit carryforwards. ASU 2013-11 is effective for annual periods beginning after December 15, 2013 and should be applied to all unrecognized tax benefits that exist as of the effective date. Companies may choose to apply this guidance retrospectively to each prior reporting period presented. Management is the process of evaluating the impact of this Update.

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, 2012.

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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 June 30, 2013 that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

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PART II: OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

In May 2008, the Company filed a complaint against MvTec Software GmbH, MvTec LLC, and Fuji America Corporation in the United States District Court for the District of Massachusetts alleging infringement of certain patents owned by the Company. In April 2009 and again in June 2009, Defendant MvTec Software GmbH filed re-examination requests of the patents-at-issue with the United States Patent and Trademark Office. This matter is ongoing.

In May 2009, the Company pre-filed a complaint with the United States International Trade Commission (ITC) pursuant to Section 337 of the Tariff Act of 1930, as amended, 19 U.S.C. §1337, against MvTec Software GmbH, MvTec LLC, Fuji America, and several other respondents alleging unfair methods of competition and unfair acts in the unlawful importation into the United States, sale for importation, or sale within the United States after importation. By this filing, the Company requested the ITC to investigate the Company’s contention that certain machine vision software, machine vision systems, and products containing the same infringe, and respondents directly infringe and/or actively induce and/or contribute to the infringement in the United States, of one or more of the Company’s U.S. patents. In July 2009, the ITC issued an order that it would institute an investigation based upon the Company’s assertions. In September 2009, the Company reached a settlement with two of the respondents, and in December 2009, the Company reached a settlement with five additional respondents. In March 2010, the Company reached a settlement with respondent Fuji Machine Manufacturing Co., Ltd. and its subsidiary Fuji America Corporation. These settlements did not have a material impact on the Company’s financial results. An ITC hearing was held in May 2010. In July 2010, the Administrative Law Judge issued an initial determination finding two of the Company’s patents invalid and that respondents did not infringe the patents-at-issue. In September 2010, the ITC issued a notice that it would review the initial determination of the Administrative Law Judge. The ITC issued its Final Determination in November 2010 in which it determined to modify-in-part and affirm-in-part the Administrative Law Judge’s determination, and terminate the investigation with a finding of no violation of Section 337 of the Tariff Act of 1930 (as amended 19 U.S.C. §1337). The Company has filed an appeal of the decision with the United States Court of Appeals for the Federal Circuit. An oral hearing before the United States Court of Appeals occurred in February 2012. This matter is ongoing.

In March 2013, the Company filed a lawsuit against Microscan Systems, Inc. (“Microscan”) and Code Corporation in the United States District Court for the Southern District of New York alleging that Microscan’s Mobile Hawk handheld imager infringes U.S. Patent 7,874,487 owned by the Company. The lawsuit seeks to prohibit Code Corporation from manufacturing the product, and Microscan from selling and distributing the product. The Company is also seeking monetary damages resulting from the alleged infringement. In April 2013, Microscan filed ex parte re-examination requests of the patent-at-issue with the United States Patent and Trademark Office. These matters are ongoing.

The Company cannot predict the outcome of the above-referenced pending matters and an adverse resolution of these lawsuits could have a material adverse effect on the Company’s financial position, liquidity, results of operations, and/or indemnification obligations. In addition, various other 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 incidental 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.

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ITEM 1A. RISK FACTORS

For a complete 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, 2012.

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 periods indicated.

	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
April 1 - April 28, 2013		—		—		—	$	100,000,000
April 29 - May 26, 2013		81,000		43.22		81,000	$	96,499,000
May 27 - June 30, 2013		187,000		44.88		187,000	$	88,109,000
Total		268,000		44.38		268,000	$	88,109,000

(1) In April 2008, the Company’s Board of Directors authorized the repurchase of up to $50,000,000 of the Company’s common stock. In November 2011, the Company’s Board of Directors authorized the repurchase of up to an additional $80,000,000 of the Company’s common stock to commence once the Company completes the $50,000,000 program noted above.

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ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

None

ITEM 6. EXHIBITS

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 June 30, 2013, formatted in xBRL: (i) Consolidated Statements of Operations for the three-month and six-month periods ended June 30, 2013 and July 1, 2012; (ii) Consolidated Statements of Comprehensive Income for the three-month and six-month periods ended June 30, 2013 and July 1, 2012; (iii) Consolidated Balance Sheets as of June 30, 2013 and December 31, 2012; (iv) Consolidated Statement of Shareholders’ Equity for the six-month period ended June 30, 2013; (v) Consolidated Condensed Statements of Cash Flows for the six-month periods ended June 30, 2013 and July 1, 2012; and (vi) Notes to Consolidated Financial Statements.

* Filed herewith

** Furnished herewith

*** Pursuant to Rule 406T of Regulation S-T, the xBRL related information in Exhibit 101 to this Quarterly Report on Form 10-Q is furnished and not filed for purposes of Sections 11 and 12 of the Securities Act of 1933 and Section 18 of the Securities Exchange Act of 1934.

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: July 29, 2013		COGNEX CORPORATION
	By:	/s/ Robert J. Willett
		Robert J. Willett
		President and Chief Executive Officer
		(principal executive officer)
	By:	/s/ Richard A. Morin
		Richard A. Morin
		Executive Vice President of Finance and Administration
		and Chief Financial Officer
		(principal financial and accounting officer)

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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: July 29, 2013	By:	/s/ Robert J. Willett
		Robert J. Willett
		President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Richard A. Morin, 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: July 29, 2013	By:	/s/ Richard A. Morin
		Richard A. Morin
		Executive Vice President of Finance and Administration
		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 that the Company’s quarterly report on Form 10-Q for the quarterly period ended June 30, 2013 (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: July 29, 2013	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 that the Company’s quarterly report on Form 10-Q for the quarterly period ended June 30, 2013 (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: July 29, 2013	By:	/s/ Richard A. Morin
		Richard A. Morin
		Executive Vice President of Finance and Administration
		and Chief Financial Officer
		(principal financial officer)

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

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Contingencies

6 Months Ended

Jun. 30, 2013

Commitments And Contingencies Disclosure [Abstract]

Contingencies

NOTE 8: Contingencies

In May 2008, the Company filed a complaint against MvTec Software GmbH, MvTec LLC, and Fuji America Corporation in the United States District Court for the District of Massachusetts alleging infringement of certain patents owned by the Company. In April 2009 and again in June 2009, Defendant MvTec Software GmbH filed re-examination requests of the patents-at-issue with the United States Patent and Trademark Office. This matter is ongoing.

In May 2009, the Company pre-filed a complaint with the United States International Trade Commission (ITC) pursuant to Section 337 of the Tariff Act of 1930, as amended, 19 U.S.C. §1337, against MvTec Software GmbH, MvTec LLC, Fuji America, and several other respondents alleging unfair methods of competition and unfair acts in the unlawful importation into the United States, sale for importation, or sale within the United States after importation. By this filing, the Company requested the ITC to investigate the Company’s contention that certain machine vision software, machine vision systems, and products containing the same infringe, and respondents directly infringe and/or actively induce and/or contribute to the infringement in the United States, of one or more of the Company’s U.S. patents. In July 2009, the ITC issued an order that it would institute an investigation based upon the Company’s assertions. In September 2009, the Company reached a settlement with two of the respondents, and in December 2009, the Company reached a settlement with five additional respondents. In March 2010, the Company reached a settlement with respondent Fuji Machine Manufacturing Co., Ltd. and its subsidiary Fuji America Corporation. These settlements did not have a material impact on the Company’s financial results. An ITC hearing was held in May 2010. In July 2010, the Administrative Law Judge issued an initial determination finding two of the Company’s patents invalid and that respondents did not infringe the patents-at-issue. In September 2010, the ITC issued a notice that it would review the initial determination of the Administrative Law Judge. The ITC issued its Final Determination in November 2010 in which it determined to modify-in-part and affirm-in-part the Administrative Law Judge’s determination, and terminate the investigation with a finding of no violation of Section 337 of the Tariff Act of 1930 (as amended 19 U.S.C. §1337). The Company has filed an appeal of the decision with the United States Court of Appeals for the Federal Circuit. An oral hearing before the United States Court of Appeals occurred in February 2012. This matter is ongoing.

In March 2013, the Company filed a lawsuit against Microscan Systems, Inc. (“Microscan”) and Code Corporation in the United States District Court for the Southern District of New York alleging that Microscan’s Mobile Hawk handheld imager infringes U.S. Patent 7,874,487 owned by the Company. The lawsuit seeks to prohibit Code Corporation from manufacturing the product, and Microscan from selling and distributing the product. The Company is also seeking monetary damages resulting from the alleged infringement. In April 2013, Microscan filed ex parte re-examination requests of the patent-at-issue with the United States Patent and Trademark Office. These matters are ongoing.

The Company cannot predict the outcome of the above-referenced pending matters and an adverse resolution of these lawsuits could have a material adverse effect on the Company’s financial position, liquidity, results of operations, and/or indemnification obligations. In addition, various other 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 incidental 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.

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Stock-Based Compensation Expense - Weighted-Average Assumptions Used in Estimating Fair Values of Stock Options Granted (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Risk-free rate	2.00%	2.00%	2.00%	2.00%
Expected dividend yield	0.00%	1.20%	0.00%	1.20%
Expected volatility	42.00%	44.00%	42.00%	44.00%
Expected term (in years)	5 years 10 months 24 days	5 years 8 months 12 days	5 years 10 months 24 days	5 years 8 months 12 days

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Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Statement Of Income And Comprehensive Income [Abstract]
Tax effect of unrealized gain (loss) on available-for-sale investments	$ (318)	$ (91)	$ (276)	$ 200
Tax effect of foreign currency translation adjustment	$ 46	$ (403)	$ (181)	$ (197)

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Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

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). 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, 2012.

In the opinion of the management of Cognex Corporation (the “Company”), the accompanying consolidated unaudited financial statements contain all adjustments, consisting of normal, recurring adjustments and financial statement reclassifications necessary to present fairly the Company’s financial position as of June 30, 2013, and the results of its operations for the three-month and six-month periods ended June 30, 2013 and July 1, 2012, 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 six-month periods ended June 30, 2013 are not necessarily indicative of the results to be expected for the full year.

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Segment Information

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Segment Information

NOTE 15: Segment Information

The Company has two reportable segments: the Modular Vision Systems Division (MVSD) and the Surface Inspection Systems Division (SISD). MVSD develops, manufactures, and markets modular vision systems that are used to control the manufacture of discrete items by locating, identifying, inspecting, and measuring them during the manufacturing process. SISD develops, manufactures, and markets surface inspection vision systems that are used to inspect surfaces of materials processed in a continuous fashion, such as metals, paper, nonwoven, plastics, and glass, to ensure there are no flaws or defects on the surfaces. Segments are determined based upon the way that management organizes its business for making operating decisions and assessing performance. The Company evaluates segment performance based upon income or loss from operations, excluding stock-based compensation expense.

The following table summarizes information about the segments (in thousands):

Three-months Ended June 30, 2013	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	72,012	$	7,686	$	—		$	79,698
Service revenue		2,301		4,511		—			6,812
Operating income		23,527		2,227		(5,581	)		20,173
Six-months Ended June 30, 2013	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	140,331	$	14,039	$	—		$	154,370
Service revenue		4,393		8,639		—			13,032
Operating income		45,603		3,959		(11,408	)		38,154
Three-months Ended July 1, 2012	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	69,743	$	8,706	$	—		$	78,449
Service revenue		1,778		4,099		—			5,877
Operating income		25,035		2,848		(4,533	)		23,350
Six-months Ended July 1, 2012	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	133,964	$	15,892	$	—		$	149,856
Service revenue		3,698		8,481		—			12,179
Operating income		46,179		5,240		(10,328	)		41,091

Reconciling items consist of stock-based compensation expense and unallocated corporate expenses, which primarily include corporate headquarters costs, professional fees, and patent infringement litigation. Additional asset information by segment is not produced internally for use by the chief operating decision maker, and therefore, is not presented. Additional asset information is not provided because cash and investments are commingled and the segments share assets and resources in a number of locations around the world.

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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		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Reconciliation of United States federal statutory corporate tax rate to Company's effective tax rate or income tax provision
Income tax at federal statutory rate	35.00%	35.00%	35.00%	35.00%
State income taxes, net of federal benefit	2.00%	1.00%	2.00%	1.00%
Foreign tax rate differential	(17.00%)	(15.00%)	(17.00%)	(15.00%)
2013 research and development credit	(1.00%)		(1.00%)
Discrete event- 2012 research and development credit			(1.00%)
Income tax provision	19.00%	21.00%	18.00%	21.00%

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Indemnification Provisions

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Indemnification Provisions

NOTE 9: Indemnification Provisions

Except as limited by Massachusetts law, the by-laws of the Company require it to indemnify certain current or former directors, officers, and employees of the Company against expenses incurred by them in connection with each proceeding in which he or she is involved as a result of serving or having served in certain capacities. Indemnification is not available with respect to a proceeding as to which it has been adjudicated that the person did not act in good faith in the reasonable belief that the action was in the best interests of the Company. The maximum potential amount of future payments the Company could be required to make under these provisions is unlimited. The Company has never incurred significant costs related to these indemnification provisions. As a result, the Company believes the estimated fair value of these provisions is minimal.

In the ordinary course of business, the Company may accept standard limited indemnification provisions in connection with the sale of its products, whereby it indemnifies its customers for certain direct damages incurred in connection with third-party patent or other intellectual property infringement claims with respect to the use of the Company’s products. The term of these indemnification provisions generally coincides with the customer’s use of the Company’s products. The maximum potential amount of future payments the Company could be required to make under these provisions is generally subject to fixed monetary limits. The Company has never incurred significant costs to defend lawsuits or settle claims related to these indemnification provisions. As a result, the Company believes the estimated fair value of these provisions is minimal.

In the ordinary course of business, the Company also accepts limited indemnification provisions from time to time, whereby it indemnifies customers for certain direct damages incurred in connection with bodily injury and property damage arising from the installation of the Company’s products. The term of these indemnification provisions generally coincides with the period of installation. The maximum potential amount of future payments the Company could be required to make under these provisions is generally limited and is likely recoverable under the Company’s insurance policies. As a result of this coverage, and the fact that the Company has never incurred significant costs to defend lawsuits or settle claims related to these indemnification provisions, the Company believes the estimated fair value of these provisions is minimal.

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Derivative Instruments - Outstanding Forward Contracts (Detail) (Currency Forward Contracts [Member]) In Thousands, unless otherwise specified	Jun. 30, 2013 Japanese Yen [Member] USD ($)	Jun. 30, 2013 Japanese Yen [Member] JPY (¥)	Jun. 30, 2013 Korean Won [Member] USD ($)	Jun. 30, 2013 Korean Won [Member] KRW	Jun. 30, 2013 Hungarian Forint [Member] USD ($)	Jun. 30, 2013 Hungarian Forint [Member] HUF	Jun. 30, 2013 Taiwanese Dollar [Member] USD ($)	Jun. 30, 2013 Taiwanese Dollar [Member] TWD	Jun. 30, 2013 Swedish Krona [Member] USD ($)	Jun. 30, 2013 Swedish Krona [Member] SEK	Jun. 30, 2013 Singapore Dollar [Member] USD ($)	Jun. 30, 2013 Singapore Dollar [Member] SGD	Jun. 30, 2013 British Pound [Member] USD ($)	Jun. 30, 2013 British Pound [Member] GBP (£)
Derivative [Line Items]
Outstanding forward contracts	$ 3,214	¥ 316,600	$ 240	275,000	$ 436	99,500	$ 920	27,500	$ 848	5,700	$ 1,968	2,500	$ 654	£ 425

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Taxes - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jul. 01, 2012	Dec. 31, 2012
Tax Credit Carryforward [Line Items]
Increase in liabilities, net of deferred tax benefit, for uncertain tax positions	$ 274,000	$ 918,000
Increase (decrease) in interest and penalties	38,000	76,000
Effective tax rate excluding effect of discrete event	0.00%	19.00%	0.00%
Reserve for income taxes, total	6,255,000	6,255,000		5,216,000
Interest and penalties, gross	1,303,000	1,303,000
Reserve for income taxes to be recorded in additional paid in capital		405,000
Minimum decrease in income tax expense due to release in reserves		1,600,000
Maximum decrease in income tax expense due to release in reserves		1,800,000
Tax years open to examination by various taxing authorities		2008 through 2012
Tax years open to examination by various taxing authorities for other entities		2006 through 2012
Tax years currently under audit by internal revenue service for U.S. federal returns		2010 and 2011
Research and Development Tax Credit [Member]
Tax Credit Carryforward [Line Items]
Reduction in tax expense	$ 555,000	$ 555,000

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Fair Value Measurements - Additional Information (Detail) (Fair Value, Measurements, Recurring [Member], USD $)	6 Months Ended
	Jun. 30, 2013
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other-than-temporary impairment loss	$ 0

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2013

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 June 30, 2013 (in thousands):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)
Assets:
Cash equivalents	$	12,947	$	—
Corporate stock		1,669		—
Money market instruments		460		—
Corporate bonds		—		190,166
Asset-backed securities		—		68,176
Treasury bills		—		52,415
Sovereign bonds		—		30,435
Municipal bonds		—		28,583
Commercial paper		—		3,000
Agency bonds		—		1,498
Currency forward contracts		—		61
Liabilities:
Currency forward contracts		—		11

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New Pronouncements (Policies)

6 Months Ended

Jun. 30, 2013

Accounting Changes And Error Corrections [Abstract]

Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income

Accounting Standards Update (ASU) 2013-02, “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income”

The amendments in ASU 2013-02 require companies to present information about amounts reclassified out of accumulated other comprehensive income (OCI) to net income, by component. The effect of significant reclassification adjustments being made out of accumulated OCI on the corresponding line items in net income must be presented when the item is reclassified in its entirety during one reporting period. While the new guidance in ASU 2013-12 changes the presentation of accumulated OCI, there are no changes to the components that are recognized in net income or OCI under current accounting guidance.

Amounts reclassified from accumulated other comprehensive income to investment income on the Consolidated Statements of Operations were realized gains of $52,000 and $83,000 during the three-month and six-month periods ended June 30, 2013, respectively, and realized gains of $977,000 and $1,071,000 during the three-month and six-month periods ended July 1, 2012, respectively.

Presentation of Unrecognized Tax Benefit When Net Operating Loss Carryforward, Similar Tax Loss, or Tax Credit Carryforward Exists

Accounting Standards Update (ASU) 2013-11, “Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists”

The amendments in ASU 2013-11 require companies to present an unrecognized tax benefit, or a portion thereof, as a reduction to a deferred tax asset for a net operating loss (NOL) carryforward or a similar tax loss or tax credit carryforward, unless the uncertain tax position is not available to reduce, or would not be used to reduce, the NOL or carryforward under the tax law in the same jurisdiction; otherwise, the unrecognized tax benefit should be presented as a gross liability and should not net the unrecognized tax benefit with a deferred tax asset. As the Company does not currently have any NOL carryforwards, this guidance will most likely apply to research and development tax credit carryforwards. ASU 2013-11 is effective for annual periods beginning after December 15, 2013 and should be applied to all unrecognized tax benefits that exist as of the effective date. Companies may choose to apply this guidance retrospectively to each prior reporting period presented. Management is the process of evaluating the impact of this Update.

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Contingencies - Additional Information (Detail)	1 Months Ended
	Jul. 31, 2010 Patents	Dec. 31, 2009 Respondent	Sep. 30, 2009 Respondent
Leases [Abstract]
Number of respondents with whom a settlement was reached		5	2
Number of the Company's patents found invalid	2

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Weighted-Average Shares (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Calculation of Weighted-Average Shares

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

	Three-months Ended				Six-months Ended
	June 30, 2013		July 1, 2012		June 30, 2013		July 1, 2012
Basic weighted-average common shares outstanding		43,522		42,851		43,392		42,710
Effect of dilutive stock options		835		750		859		889
Weighted-average common and common-equivalent shares outstanding		44,357		43,601		44,251		43,599

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Cash, Cash Equivalents, and Investments - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013 Equity Securities [Member]	Dec. 31, 2012 Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value					$ 1,669,000	$ 2,131,000
Gross unrealized loss			462,000		462,000
Gross realized gains on sale of investments	101,000	1,233,000	150,000	1,327,000
Gross realized losses on sale of investments	49,000	238,000	67,000	238,000
Maximum amount committed to invest in limited partnership			20,500,000
Contribution to limited partnership	19,886,000		19,886,000
Remaining amount of commitment in limited partnership	614,000		614,000
Investment expiration date			Dec. 31, 2013
Number of contributions made during the period			0
Cash distribution received	$ 1,285,000

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Derivative Instruments - Information Regarding Fair Value of Forward Contracts Outstanding (Detail) (Currency Forward Contracts [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Accrued expenses [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	$ 11	$ 14
Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 61	$ 44

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Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2013

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Outstanding Forward Contracts

As of June 30, 2013, the Company had the following outstanding forward contracts that were entered into to mitigate foreign currency exchange rate risk (in thousands):

Currency	Notional Value		USD Equivalent
Japanese Yen		316,600	$	3,214
Korean Won		275,000		240
Hungarian Forint		99,500		436
Taiwanese Dollar		27,500		920
Swedish Krona		5,700		848
Singapore Dollar		2,500		1,968
British Pound		425		654

Information Regarding Fair Value of Forward Contracts Outstanding

Information regarding the fair value of the forward contracts outstanding as of June 30, 2013 and December 31, 2012 was as follows (in thousands):

	Asset Derivatives					Liability Derivatives
		Fair Value					Fair Value
	Balance Sheet Location	June 30, 2013		December 31, 2012		Balance Sheet Location	June 30, 2013		December 31, 2012
Foreign currency forward contracts	Prepaid expenses and other current assets	$	61	$	44	Accrued expenses	$	11	$	14

Information Regarding Effect of Forward Contracts, Net of Underlying Exposure, on Consolidated Statements of Operations

Information regarding the effect of the forward contracts, net of the underlying exposure, on the Consolidated Statements of Operations for the three-month and six-month periods ended June 30, 2013 and July 1, 2012 was as follows (in thousands):

		Amount of Gain Recognized					Amount of Gain  (Loss) Recognized
		Three-months ended					Six-months ended
	Location of Gain Recognized	June 30, 2013		July 1, 2012		Location of Gain (Loss) Recognized	June 30, 2013		July 1, 2012
Foreign currency forward contracts	Foreign currency gain	$	64	$	198	Foreign currency gain (loss)	$	197	$	(91	)

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Cash, Cash Equivalents, and Investments - Effective Maturity Dates of Available-for-Sale Investments (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013
Schedule of Available-for-sale Securities [Line Items]
Less than 1 Year	$ 133,620
1-2 Years	133,499
2-3 Years	96,042
3-4 Years	9,220
4-5 Years	1,892
Fair Value	374,273
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 1 Year	80,386
1-2 Years	48,477
2-3 Years	54,059
3-4 Years	6,729
4-5 Years	515
Fair Value	190,166
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 1 Year	26,910
1-2 Years	35,072
2-3 Years	6,194
Fair Value	68,176
Treasury Bills [Member]
Schedule of Available-for-sale Securities [Line Items]
1-2 Years	29,870
2-3 Years	22,545
Fair Value	52,415
Sovereign Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 1 Year	7,383
1-2 Years	11,263
2-3 Years	10,907
4-5 Years	882
Fair Value	30,435
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 1 Year	14,443
1-2 Years	8,817
2-3 Years	2,337
3-4 Years	2,491
4-5 Years	495
Fair Value	28,583
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 1 Year	3,000
Fair Value	3,000
Agency Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 1 Year	1,498
Fair Value	$ 1,498

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Subsequent Event

6 Months Ended

Jun. 30, 2013

Subsequent Events [Abstract]

Subsequent Event

NOTE 16: Subsequent Event

On July 29, 2013 the Company’s Board of Directors declared a two-for-one split of its common stock. The split will be effected in the form of a stock dividend, payable on September 16, 2013 to shareholders of record on August 26, 2013.

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Reserves for accounts receivable	$ 1,134	$ 1,131
Common stock, par value	$ 0.002	$ 0.002
Common stock, shares authorized	140,000	140,000
Common stock, shares issued	43,497	43,055

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Consolidated Statement of Shareholders' Equity (Parenthetical) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Statement Of Stockholders Equity [Abstract]
Tax effect of unrealized loss on available-for-sale investments	$ 276
Tax effect of foreign currency translation adjustment	$ 181

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New Pronouncements

6 Months Ended

Jun. 30, 2013

Accounting Changes And Error Corrections [Abstract]

New Pronouncements

NOTE 2: New Pronouncements

Accounting Standards Update (ASU) 2013-02, “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income”

The amendments in ASU 2013-02 require companies to present information about amounts reclassified out of accumulated other comprehensive income (OCI) to net income, by component. The effect of significant reclassification adjustments being made out of accumulated OCI on the corresponding line items in net income must be presented when the item is reclassified in its entirety during one reporting period. While the new guidance in ASU 2013-12 changes the presentation of accumulated OCI, there are no changes to the components that are recognized in net income or OCI under current accounting guidance.

Amounts reclassified from accumulated other comprehensive income to investment income on the Consolidated Statements of Operations were realized gains of $52,000 and $83,000 during the three-month and six-month periods ended June 30, 2013, respectively, and realized gains of $977,000 and $1,071,000 during the three-month and six-month periods ended July 1, 2012, respectively.

Accounting Standards Update (ASU) 2013-11, “Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists”

The amendments in ASU 2013-11 require companies to present an unrecognized tax benefit, or a portion thereof, as a reduction to a deferred tax asset for a net operating loss (NOL) carryforward or a similar tax loss or tax credit carryforward, unless the uncertain tax position is not available to reduce, or would not be used to reduce, the NOL or carryforward under the tax law in the same jurisdiction; otherwise, the unrecognized tax benefit should be presented as a gross liability and should not net the unrecognized tax benefit with a deferred tax asset. As the Company does not currently have any NOL carryforwards, this guidance will most likely apply to research and development tax credit carryforwards. ASU 2013-11 is effective for annual periods beginning after December 15, 2013 and should be applied to all unrecognized tax benefits that exist as of the effective date. Companies may choose to apply this guidance retrospectively to each prior reporting period presented. Management is the process of evaluating the impact of this Update.

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Consolidated Condensed Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012
Cash flows from operating activities:
Net income	$ 32,403	$ 34,049
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	6,079	5,303
Depreciation of property, plant, and equipment	3,596	3,180
Amortization of intangible assets	1,921	2,086
Amortization of discounts or premiums on investments	1,443	3,582
Realized gain on sale of investments	(83)	(1,071)
Tax effect of stock option exercises	(2,773)	(2,969)
Change in deferred income taxes	(1,748)	(1,076)
Unrealized loss on trading securities	462
Change in operating assets and liabilities	(2,325)	(2,912)
Net cash provided by operating activities	38,975	40,172
Cash flows from investing activities:
Purchases of investments	(167,652)	(109,104)
Maturities and sales of investments	129,329	242,952
Purchases of property, plant, and equipment	(4,310)	(5,304)
Net cash provided by (used in) investing activities	(42,633)	128,544
Cash flows from financing activities:
Issuance of common stock under stock option plans	16,242	13,929
Repurchase of common stock	(11,891)
Payment of dividends		(8,985)
Tax effect of stock option exercises	2,773	2,969
Net cash provided by financing activities	7,124	7,913
Effect of foreign exchange rate changes on cash and cash equivalents	(752)	(8,740)
Net change in cash and cash equivalents	2,714	167,889
Cash and cash equivalents at beginning of period	45,160	38,103
Cash and cash equivalents at end of period	$ 47,874	$ 205,992

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Cash, Cash Equivalents, and Investments - Summary of Available-for-Sale Investments (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 375,053
Gross Unrealized Gains	611
Gross Unrealized Losses	(1,391)
Fair Value	374,273
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	190,166
Corporate Bonds [Member] | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	80,547
Gross Unrealized Gains	119
Gross Unrealized Losses	(280)
Fair Value	80,386
Corporate Bonds [Member] | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	109,785
Gross Unrealized Gains	373
Gross Unrealized Losses	(378)
Fair Value	109,780
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	68,176
Asset-Backed Securities [Member] | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	27,076
Gross Unrealized Gains	6
Gross Unrealized Losses	(172)
Fair Value	26,910
Asset-Backed Securities [Member] | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	41,539
Gross Unrealized Gains	6
Gross Unrealized Losses	(279)
Fair Value	41,266
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	28,583
Municipal Bonds [Member] | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	14,416
Gross Unrealized Gains	28
Gross Unrealized Losses	(1)
Fair Value	14,443
Municipal Bonds [Member] | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	14,110
Gross Unrealized Gains	62
Gross Unrealized Losses	(32)
Fair Value	14,140
Sovereign Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	30,435
Sovereign Bonds [Member] | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,396
Gross Unrealized Losses	(13)
Fair Value	7,383
Sovereign Bonds [Member] | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	23,199
Gross Unrealized Gains	17
Gross Unrealized Losses	(164)
Fair Value	23,052
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	3,000
Commercial Paper [Member] | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,000
Fair Value	3,000
Agency Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	1,498
Agency Bonds [Member] | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,498
Fair Value	1,498
Treasury Bills [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	52,415
Treasury Bills [Member] | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	52,487
Gross Unrealized Losses	(72)
Fair Value	$ 52,415

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Cash, Cash Equivalents, and Investments (Tables)

6 Months Ended

Jun. 30, 2013

Cash And Cash Equivalents [Abstract]

Components of Cash, Cash Equivalents, and Investments

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

	June 30, 2013		December 31, 2012
Cash	$	34,467	$	34,986
Cash equivalents		12,947		5,098
Money market instruments		460		5,076
Cash and cash equivalents		47,874		45,160
Corporate bonds		80,386		46,001
Asset-backed securities		26,910		17,666
Municipal bonds		14,443		16,224
Sovereign bonds		7,383		3,986
Commercial paper		3,000		—
Corporate stock		1,669		2,131
Agency bonds		1,498		7,482
Covered bonds		—		5,618
Treasury bills		—		5,997
Short-term investments		135,289		105,105
Corporate bonds		109,780		100,072
Treasury bills		52,415		36,276
Asset-backed securities		41,266		34,710
Sovereign bonds		23,052		10,606
Municipal bonds		14,140		17,846
Agency bonds		—		29,441
Covered bonds		—		5,564
Limited partnership interest (accounted for using cost method)		2,455		3,740
Long-term investments		243,108		238,255
	$	426,271	$	388,520

Summary of Available-for-Sale Investments

The following tables summarize the Company’s available-for-sale investments as of June 30, 2013 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Corporate bonds	$	80,547	$	119	$	(280	)	$	80,386
Asset-backed securities		27,076		6		(172	)		26,910
Municipal bonds		14,416		28		(1	)		14,443
Sovereign bonds		7,396		—		(13	)		7,383
Commercial paper		3,000		—		—			3,000
Agency bonds		1,498		—		—			1,498
Long-term:
Corporate bonds		109,785		373		(378	)		109,780
Treasury bills		52,487		—		(72	)		52,415
Asset-backed securities		41,539		6		(279	)		41,266
Sovereign bonds		23,199		17		(164	)		23,052
Municipal bonds		14,110		62		(32	)		14,140
	$	375,053	$	611	$	(1,391	)	$	374,273

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 June 30, 2013 (in thousands):

	Unrealized Loss Position For:
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	107,235	$	(658	)	$	—	$	—		$	107,235	$	(658	)
Sovereign bonds		23,007		(177	)		—		—			23,007		(177	)
Municipal bonds		5,846		(33	)		—		—			5,846		(33	)
Asset- backed securities		59,180		(449	)		1,570		(2	)		60,750		(451	)
Treasury bills		50,617		(72	)		—		—			50,617		(72	)
	$	245,885	$	(1,389	)	$	1,570	$	(2	)	$	247,455	$	(1,391	)

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 June 30, 2013 (in thousands):

	<1 Year		1-2 Years		2-3 Years		3-4 Years		4-5 Years		Total
Corporate bonds	$	80,386	$	48,477	$	54,059	$	6,729	$	515	$	190,166
Asset-backed securities		26,910		35,072		6,194		—		—		68,176
Treasury bills		—		29,870		22,545		—		—		52,415
Sovereign bonds		7,383		11,263		10,907		—		882		30,435
Municipal bonds		14,443		8,817		2,337		2,491		495		28,583
Commercial paper		3,000		—		—		—		—		3,000
Agency bonds		1,498		—		—		—		—		1,498
	$	133,620	$	133,499	$	96,042	$	9,220	$	1,892	$	374,273

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Stock-Based Compensation Expense (Tables)

6 Months Ended

Jun. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

The following table summarizes the Company’s stock option activity for the six-month period ended June 30, 2013:

	Shares (in  thousands)			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2012		3,559		$	25.56
Granted		823			42.12
Exercised		(710	)		22.88
Forfeited or expired		(122	)		32.53
Outstanding as of June 30, 2013		3,550		$	29.70		7.4	$	55,132
Exercisable as of June 30, 2013		1,309		$	23.03		5.8	$	29,075
Options vested or expected to vest at June 30, 2013 (1)		3,139		$	28.93		7.3	$	51,172

(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						Six-months Ended
	June 30, 2013			July 1, 2012			June 30, 2013			July 1, 2012
Risk-free rate		2.0	%		2.0	%		2.0	%		2.0	%
Expected dividend yield		0	%		1.2	%		0	%		1.2	%
Expected volatility		42	%		44	%		42	%		44	%
Expected term (in years)		5.9			5.7			5.9			5.7

Stock-Based Compensation Expense

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

	Three-months Ended				Six-months Ended
	June 30, 2013		July 1, 2012		June 30, 2013		July 1, 2012
Product cost of revenue	$	177	$	135	$	404	$	375
Service cost of revenue		47		40		110		108
Research, development, and engineering		650		483		1,463		1,350
Selling, general, and administrative		1,907		1,331		4,102		3,470
	$	2,781	$	1,989	$	6,079	$	5,303

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets:
Money market instruments	$ 460	$ 5,076
Financial assets at fair value	374,273
Corporate Bonds [Member]
Assets:
Financial assets at fair value	190,166
Asset-Backed Securities [Member]
Assets:
Financial assets at fair value	68,176
Treasury Bills [Member]
Assets:
Financial assets at fair value	52,415
Sovereign Bonds [Member]
Assets:
Financial assets at fair value	30,435
Municipal Bonds [Member]
Assets:
Financial assets at fair value	28,583
Commercial Paper [Member]
Assets:
Financial assets at fair value	3,000
Agency Bonds [Member]
Assets:
Financial assets at fair value	1,498
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Cash equivalents	12,947
Corporate stock	1,669
Money market instruments	460
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member]
Assets:
Financial assets at fair value
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Asset-Backed Securities [Member]
Assets:
Financial assets at fair value
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Treasury Bills [Member]
Assets:
Financial assets at fair value
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Sovereign Bonds [Member]
Assets:
Financial assets at fair value
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Municipal Bonds [Member]
Assets:
Financial assets at fair value
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Commercial Paper [Member]
Assets:
Financial assets at fair value
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Agency Bonds [Member]
Assets:
Financial assets at fair value
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Currency Forward Contract [Member]
Assets:
Currency forward contracts
Liabilities:
Currency forward contracts
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Cash equivalents
Corporate stock
Money market instruments
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member]
Assets:
Financial assets at fair value	190,166
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Asset-Backed Securities [Member]
Assets:
Financial assets at fair value	68,176
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Treasury Bills [Member]
Assets:
Financial assets at fair value	52,415
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Sovereign Bonds [Member]
Assets:
Financial assets at fair value	30,435
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Municipal Bonds [Member]
Assets:
Financial assets at fair value	28,583
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Commercial Paper [Member]
Assets:
Financial assets at fair value	3,000
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Agency Bonds [Member]
Assets:
Financial assets at fair value	1,498
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Currency Forward Contract [Member]
Assets:
Currency forward contracts	61
Liabilities:
Currency forward contracts	$ 11

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Stock Repurchase Program - Additional Information (Detail) (USD $)	1 Months Ended		3 Months Ended	6 Months Ended
	Nov. 30, 2011	Apr. 30, 2008	Jun. 30, 2013	Jun. 30, 2013
Equity [Abstract]
Repurchase of authorized common stock	$ 80,000,000	$ 50,000,000
Repurchase of shares			1,643,875	1,643,875
Repurchase of shares during period			268,000
Repurchase of shares, Value			41,891,000	41,891,000
Repurchase of shares during period, Value			11,891,000	11,891,000
Repurchase of remaining shares, Value				$ 8,109,000

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Derivative Instruments - Information Regarding Effect of Forward Contracts, Net of Underlying Exposure, on Consolidated Statements of Operations (Detail) (Foreign Currency Gain (Loss) [Member], Currency Forward Contracts [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Foreign Currency Gain (Loss) [Member] | Currency Forward Contracts [Member]
Information regarding the effect of the forward contracts, net of the underlying exposure, on the Consolidated Statements of Operations
Amount of Gain (Loss) Recognized	$ 64	$ 198	$ 197	$ (91)

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Warranty Obligations - Changes in Warranty Obligations (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Payables And Accruals [Abstract]
Beginning Balance	$ 2,256
Provisions for warranties during the period	1,265
Fulfillment of warranty obligations	(990)
Foreign exchange rate changes	(24)
Ending Balance	$ 2,507

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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 16,820	$ 19,767	$ 32,403	$ 34,049
Other comprehensive loss, net of tax:
Net unrealized gain (loss) on available-for-sale investments, net of tax of ($318) and ($91) in the three-month periods and net of tax of ($276) and $200 in the six-month periods, respectively	(1,279)	304	(1,106)	1,618
Foreign currency translation adjustments, net of tax of $46 and ($403) in the three-month periods and net of tax of ($181) and ($197) in the six-month periods, respectively	687	(14,507)	(1,807)	(9,181)
Other comprehensive loss	(592)	(14,203)	(2,913)	(7,563)
Comprehensive income	$ 16,228	$ 5,564	$ 29,490	$ 26,486

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Inventories

6 Months Ended

Jun. 30, 2013

Inventory Disclosure [Abstract]

Inventories

NOTE 5: Inventories

Inventories consisted of the following (in thousands):

	June 30, 2013		December 31, 2012
Raw materials	$	12,837	$	12,667
Work-in-process		3,947		4,193
Finished goods		9,869		9,322
	$	26,653	$	26,182

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 47,874	$ 45,160
Short-term investments	135,289	105,105
Accounts receivable, less reserves of $1,134 and $1,131 in 2013 and 2012, respectively	45,215	42,387
Inventories	26,653	26,182
Deferred income taxes	6,371	6,369
Prepaid expenses and other current assets	15,777	14,394
Total current assets	277,179	239,597
Long-term investments	243,108	238,255
Property, plant, and equipment, net	35,343	34,820
Deferred income taxes	17,820	15,647
Intangible assets, net	12,849	14,770
Goodwill	81,689	81,689
Other assets	2,388	2,827
Total assets	670,376	627,605
Current liabilities:
Accounts payable	7,157	6,815
Accrued expenses	28,279	29,590
Accrued income taxes	208	1,009
Deferred revenue and customer deposits	13,479	12,690
Total current liabilities	49,123	50,104
Reserve for income taxes	6,255	5,216
Commitments and contingencies (Note 8)
Shareholders' equity:
Common stock, $.002 par value - Authorized: 140,000 shares, issued: 43,497 and 43,055 shares in 2013 and 2012, respectively	87	86
Additional paid-in capital	190,444	165,248
Retained earnings	456,978	436,466
Accumulated other comprehensive loss, net of tax	(32,511)	(29,515)
Total shareholders' equity	614,998	572,285
Total liabilities and shareholders' equity	$ 670,376	$ 627,605

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Weighted-Average Shares - Calculation of Weighted-Average Shares (Detail) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Earnings Per Share [Abstract]
Basic weighted-average common shares outstanding	43,522	42,851	43,392	42,710
Effect of dilutive stock options	835	750	859	889
Weighted-average common and common-equivalent shares outstanding	44,357	43,601	44,251	43,599

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Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Revenue
Product	$ 79,698	$ 78,449	$ 154,370	$ 149,856
Service	6,812	5,877	13,032	12,179
Total revenue	86,510	84,326	167,402	162,035
Cost of revenue
Product	17,910	17,635	34,374	33,191
Service	3,240	2,914	6,199	6,416
Total cost of revenue	21,150	20,549	40,573	39,607
Gross margin
Product	61,788	60,814	119,996	116,665
Service	3,572	2,963	6,833	5,763
Total gross margin	65,360	63,777	126,829	122,428
Research, development, and engineering expenses	11,887	10,300	23,208	20,661
Selling, general, and administrative expenses	33,300	30,127	65,467	60,676
Operating income	20,173	23,350	38,154	41,091
Foreign currency gain (loss)	76	(30)	139	(668)
Investment income	774	1,801	1,166	2,773
Other expense	(257)	(99)	(140)	(96)
Income before income tax expense	20,766	25,022	39,319	43,100
Income tax expense	3,946	5,255	6,916	9,051
Net income	$ 16,820	$ 19,767	$ 32,403	$ 34,049
Earnings per weighted-average common and common-equivalent share:
Basic	$ 0.39	$ 0.46	$ 0.75	$ 0.80
Diluted	$ 0.38	$ 0.45	$ 0.73	$ 0.78
Weighted-average common and common-equivalent shares outstanding:
Basic	43,522	42,851	43,392	42,710
Diluted	44,357	43,601	44,251	43,599
Cash dividends per common share	$ 0.00	$ 0.11	$ 0.00	$ 0.21

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Stock-Based Compensation Expense - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013 OptionPlan Employees	Jul. 01, 2012	Jun. 30, 2013 OptionPlan Employees	Jul. 01, 2012	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under stock option plans	5,614,591		5,614,591
Number of stock option plans	2		2
Expected dividend yield	0.00%	1.20%	0.00%	1.20%
Weighted-average grant-date fair values of stock options granted	$ 16.13	$ 13.50	$ 16.13	$ 13.35
Number of groups within the employee population	2		2
Percentage of stock options granted to senior management expected to vest	71.00%		71.00%
Percentage of stock options granted to all other employees expected to vest	69.00%		69.00%
Estimated forfeiture rate for unvested options for senior management	12.00%		12.00%
Estimated forfeiture rate for unvested options for all non-senior management	13.00%		13.00%
Stock-based compensation expense	$ 2,781,000	$ 1,989,000	$ 6,079,000	$ 5,303,000
Income tax benefit recognized related to stock-based compensation expense	911,000	646,000	2,004,000	1,733,000
Compensation expense was capitalized	0		0		0
Total intrinsic values of stock options exercised	6,759,000	672,000	13,952,000	13,308,000
Total fair values of stock options vest	2,298,000	2,286,000	9,230,000	8,686,000
Total unrecognized compensation expense related to non-vested stock options	$ 12,233,000		$ 12,233,000
Weighted-average period for unrecognized compensation expense related to non-vested stock options (years)			1 year 7 months 6 days
General Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under stock option plans	4,355,481		4,355,481
Expiration period of stock option plan			10 years
Vesting period for stock option plans			4 years
Stock Option and Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under stock option plans	1,259,110		1,259,110
Expiration period of stock option plan			10 years
Vesting period for stock option plans			4 years
2015 Through Expected Life of Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield			1.04%

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Inventories (Tables)

6 Months Ended

Jun. 30, 2013

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following (in thousands):

	June 30, 2013		December 31, 2012
Raw materials	$	12,837	$	12,667
Work-in-process		3,947		4,193
Finished goods		9,869		9,322
	$	26,653	$	26,182

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Weighted-Average Shares

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Weighted-Average Shares

NOTE 14: Weighted-Average Shares

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

	Three-months Ended				Six-months Ended
	June 30, 2013		July 1, 2012		June 30, 2013		July 1, 2012
Basic weighted-average common shares outstanding		43,522		42,851		43,392		42,710
Effect of dilutive stock options		835		750		859		889
Weighted-average common and common-equivalent shares outstanding		44,357		43,601		44,251		43,599

Stock options to purchase 819,407 and 634,643 shares of common stock, on a weighted-average basis, were outstanding during the three-month and six-month periods ended June 30, 2013, respectively, and 931,839 and 872,237 for the same periods in 2012, but were not included in the calculation of dilutive net income per share because they were anti-dilutive.

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Inventories - Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Raw materials	$ 12,837	$ 12,667
Work-in-process	3,947	4,193
Finished goods	9,869	9,322
Inventories	$ 26,653	$ 26,182

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Stock-Based Compensation Expense - Stock-Based Compensation Expense (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 2,781,000	$ 1,989,000	$ 6,079,000	$ 5,303,000
Product Cost of Revenue [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	177,000	135,000	404,000	375,000
Service Cost of Revenue [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	47,000	40,000	110,000	108,000
Research, Development, and Engineering [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	650,000	483,000	1,463,000	1,350,000
Selling, General, and Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 1,907,000	$ 1,331,000	$ 4,102,000	$ 3,470,000

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Cash, Cash Equivalents, and Investments - Components of Cash, Cash Equivalents, and Investments (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jul. 01, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Cash	$ 34,467	$ 34,986
Cash equivalents	12,947	5,098
Money market instruments	460	5,076
Cash and cash equivalents	47,874	45,160	205,992	38,103
Short-term investments	135,289	105,105
Limited partnership interest (accounted for using cost method)	2,455	3,740
Long-term investments	243,108	238,255
Total	426,271	388,520
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	80,386	46,001
Long-term investments	109,780	100,072
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	26,910	17,666
Long-term investments	41,266	34,710
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	14,443	16,224
Long-term investments	14,140	17,846
Sovereign Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	7,383	3,986
Long-term investments	23,052	10,606
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	3,000
Corporate Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	1,669	2,131
Agency Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	1,498	7,482
Long-term investments		29,441
Covered Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments		5,618
Long-term investments		5,564
Treasury Bills [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments		5,997
Long-term investments	$ 52,415	$ 36,276

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Segment Information (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Information About Segments

The following table summarizes information about the segments (in thousands):

Three-months Ended June 30, 2013	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	72,012	$	7,686	$	—		$	79,698
Service revenue		2,301		4,511		—			6,812
Operating income		23,527		2,227		(5,581	)		20,173
Six-months Ended June 30, 2013	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	140,331	$	14,039	$	—		$	154,370
Service revenue		4,393		8,639		—			13,032
Operating income		45,603		3,959		(11,408	)		38,154
Three-months Ended July 1, 2012	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	69,743	$	8,706	$	—		$	78,449
Service revenue		1,778		4,099		—			5,877
Operating income		25,035		2,848		(4,533	)		23,350
Six-months Ended July 1, 2012	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	133,964	$	15,892	$	—		$	149,856
Service revenue		3,698		8,481		—			12,179
Operating income		46,179		5,240		(10,328	)		41,091

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New Pronouncements - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
New Accounting Pronouncement or Change in Accounting Principle, Retrospective Adjustments [Abstract]
Reclassification from accumulated other comprehensive income to investment income	$ 52,000	$ 977,000	$ 83,000	$ 1,071,000

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Cash, Cash Equivalents, and Investments

6 Months Ended

Jun. 30, 2013

Cash And Cash Equivalents [Abstract]

Cash, Cash Equivalents, and Investments

NOTE 4: Cash, Cash Equivalents, and Investments

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

	June 30, 2013		December 31, 2012
Cash	$	34,467	$	34,986
Cash equivalents		12,947		5,098
Money market instruments		460		5,076
Cash and cash equivalents		47,874		45,160
Corporate bonds		80,386		46,001
Asset-backed securities		26,910		17,666
Municipal bonds		14,443		16,224
Sovereign bonds		7,383		3,986
Commercial paper		3,000		—
Corporate stock		1,669		2,131
Agency bonds		1,498		7,482
Covered bonds		—		5,618
Treasury bills		—		5,997
Short-term investments		135,289		105,105
Corporate bonds		109,780		100,072
Treasury bills		52,415		36,276
Asset-backed securities		41,266		34,710
Sovereign bonds		23,052		10,606
Municipal bonds		14,140		17,846
Agency bonds		—		29,441
Covered bonds		—		5,564
Limited partnership interest (accounted for using cost method)		2,455		3,740
Long-term investments		243,108		238,255
	$	426,271	$	388,520

The Company’s investment portfolio includes corporate bonds, asset-backed securities, treasury bills, sovereign bonds, municipal bonds, commercial paper, and agency bonds. Corporate bonds consist of debt securities issued by both domestic and foreign companies; asset-backed securities consist of debt securities collateralized by pools of receivables or loans with credit enhancement; treasury bills consist of debt securities issued by both the U.S. and foreign governments; sovereign bonds consist of direct debt issued by foreign governments; municipal bonds consist of debt securities issued by state and local government entities; commercial paper consists of debt instruments issued by corporations or financial institutions with high quality debt ratings; and agency bonds consist of domestic or foreign obligations of government agencies and government sponsored enterprises that have government backing.

During the fourth quarter of 2012, the Company purchased equity securities, representing stock in a publicly-traded U.S. company, with an aggregate fair value of $2,131,000 as of December 31, 2012. As of June 30, 2013, these securities had an aggregate fair value of $1,669,000, resulting in an unrealized loss of $462,000.

The following tables summarize the Company’s available-for-sale investments as of June 30, 2013 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Corporate bonds	$	80,547	$	119	$	(280	)	$	80,386
Asset-backed securities		27,076		6		(172	)		26,910
Municipal bonds		14,416		28		(1	)		14,443
Sovereign bonds		7,396		—		(13	)		7,383
Commercial paper		3,000		—		—			3,000
Agency bonds		1,498		—		—			1,498
Long-term:
Corporate bonds		109,785		373		(378	)		109,780
Treasury bills		52,487		—		(72	)		52,415
Asset-backed securities		41,539		6		(279	)		41,266
Sovereign bonds		23,199		17		(164	)		23,052
Municipal bonds		14,110		62		(32	)		14,140
	$	375,053	$	611	$	(1,391	)	$	374,273

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 June 30, 2013 (in thousands):

	Unrealized Loss Position For:
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	107,235	$	(658	)	$	—	$	—		$	107,235	$	(658	)
Sovereign bonds		23,007		(177	)		—		—			23,007		(177	)
Municipal bonds		5,846		(33	)		—		—			5,846		(33	)
Asset- backed securities		59,180		(449	)		1,570		(2	)		60,750		(451	)
Treasury bills		50,617		(72	)		—		—			50,617		(72	)
	$	245,885	$	(1,389	)	$	1,570	$	(2	)	$	247,455	$	(1,391	)

As of June 30, 2013, the Company did not recognize an 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, our 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 its effective maturity or market price recovery.

The Company recorded gross realized gains and gross realized losses on the sale of investments totaling $101,000 and $49,000, respectively, during the three-month period ended June 30, 2013, and $1,233,000 and $238,000, respectively, during the three-month period ended July 1, 2012. The Company recorded gross realized gains and gross realized losses on the sale of investments totaling $150,000 and $67,000, respectively, during the six-month period ended June 30, 2013, and $1,327,000 and $238,000, respectively, during the six-month period ended July 1, 2012.

The following table presents the effective maturity dates of the Company’s available-for-sale investments as of June 30, 2013 (in thousands):

	<1 Year		1-2 Years		2-3 Years		3-4 Years		4-5 Years		Total
Corporate bonds	$	80,386	$	48,477	$	54,059	$	6,729	$	515	$	190,166
Asset-backed securities		26,910		35,072		6,194		—		—		68,176
Treasury bills		—		29,870		22,545		—		—		52,415
Sovereign bonds		7,383		11,263		10,907		—		882		30,435
Municipal bonds		14,443		8,817		2,337		2,491		495		28,583
Commercial paper		3,000		—		—		—		—		3,000
Agency bonds		1,498		—		—		—		—		1,498
	$	133,620	$	133,499	$	96,042	$	9,220	$	1,892	$	374,273

The Company is a Limited Partner in Venrock Associates III, L.P. (Venrock), a venture capital fund. The Company has committed to a total investment in the limited partnership of up to $20,500,000, with an expiration date of December 31, 2013. As of June 30, 2013, the Company contributed $19,886,000 to the partnership. The remaining commitment of $614,000 can be called by Venrock at any time before December 31, 2013. Distributions and contributions are at the discretion of Venrock’s management. No contributions were made during the six-month period ended June 30, 2013. The Company received a cash distribution of $1,285,000 during the second quarter of 2013, which was accounted for as a return of capital.

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Subsequent Event - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2013
Subsequent Events [Abstract]
Stock dividend payable date	Sep. 16, 2013

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Warranty Obligations (Tables)

6 Months Ended

Jun. 30, 2013

Guarantees [Abstract]

Changes in Warranty Obligations

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

Balance as of December 31, 2012	$	2,256
Provisions for warranties during the period		1,265
Fulfillment of warranty obligations		(990	)
Foreign exchange rate changes		(24	)
Balance as of June 30, 2013	$	2,507

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Cash, Cash Equivalents, and Investments - Gross Unrealized Losses and Fair Values for Available-for-Sale Investments (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	$ 245,885
Unrealized Losses, Less than 12 Months	(1,389)
Fair Value, 12 Months or Greater	1,570
Unrealized Losses, 12 Months or Greater	(2)
Total Fair Value	247,455
Total Unrealized Losses	(1,391)
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	107,235
Unrealized Losses, Less than 12 Months	(658)
Total Fair Value	107,235
Total Unrealized Losses	(658)
Sovereign Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	23,007
Unrealized Losses, Less than 12 Months	(177)
Total Fair Value	23,007
Total Unrealized Losses	(177)
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	5,846
Unrealized Losses, Less than 12 Months	(33)
Total Fair Value	5,846
Total Unrealized Losses	(33)
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	59,180
Unrealized Losses, Less than 12 Months	(449)
Fair Value, 12 Months or Greater	1,570
Unrealized Losses, 12 Months or Greater	(2)
Total Fair Value	60,750
Total Unrealized Losses	(451)
Treasury Bills [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	50,617
Unrealized Losses, Less than 12 Months	(72)
Total Fair Value	50,617
Total Unrealized Losses	$ (72)

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Warranty Obligations

6 Months Ended

Jun. 30, 2013

Guarantees [Abstract]

Warranty Obligations

NOTE 7: Warranty Obligations

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

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

Balance as of December 31, 2012	$	2,256
Provisions for warranties during the period		1,265
Fulfillment of warranty obligations		(990	)
Foreign exchange rate changes		(24	)
Balance as of June 30, 2013	$	2,507

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Fair Value Measurements

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value Measurements

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 June 30, 2013 (in thousands):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)
Assets:
Cash equivalents	$	12,947	$	—
Corporate stock		1,669		—
Money market instruments		460		—
Corporate bonds		—		190,166
Asset-backed securities		—		68,176
Treasury bills		—		52,415
Sovereign bonds		—		30,435
Municipal bonds		—		28,583
Commercial paper		—		3,000
Agency bonds		—		1,498
Currency forward contracts		—		61
Liabilities:
Currency forward contracts		—		11

The Company’s cash equivalents and 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 investments. The Company’s corporate stock position is reported at fair value based upon quoted market prices on a stock exchange, and is therefore classified as a Level 1 investment.

The Company’s debt securities and currency 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, and are therefore classified as Level 2 investments. 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 did not record an other-than-temporary impairment of these investments during the six-month period ended June 30, 2013.

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

The Company has an interest in a limited partnership, which is accounted for using the cost method and is required to be measured at fair value on a non-recurring basis. Management is responsible for estimating the fair value of this investment, and in doing so, considers valuations of the partnership’s investments as determined by the General Partner. Publicly-traded investments in active markets are reported at the market closing price less a discount, as appropriate, to reflect restricted marketability. Fair value for private investments for which observable market prices in active markets do not exist is based upon the best information available including the value of a recent financing, reference to observable valuation measures for comparable companies (such as revenue multiples), public or private transactions (such as the sale of a comparable company), and valuations for publicly-traded comparable companies. The valuations also incorporate the General Partner’s own judgment and close familiarity with the business activities of each portfolio company. Significant increases or decreases in any of these inputs in isolation may result in a significantly lower or higher fair value measurement. The portfolio consists of securities of public and private companies, and consequently, inputs used in the fair value calculation are classified as Level 3. The Company did not record an other-than-temporary impairment of this asset during the six-month period ended June 30, 2013.

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

Non-financial assets such as goodwill, intangible assets, and property, plant, and equipment 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 six-month period ended June 30, 2013.

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Consolidated Statement of Shareholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 31, 2012	$ 572,285,000	$ 86,000	$ 165,248,000	$ 436,466,000	$ (29,515,000)
Beginning Balance, Shares at Dec. 31, 2012	43,055,000	43,055,000
Issuance of common stock under stock option plans	16,242,000	1,000	16,241,000
Issuance of common stock under stock option plans, shares	710,000	710,000
Repurchase of common stock	(11,891,000)			(11,891,000)
Repurchase of common stock, shares		(268,000)
Stock-based compensation expense	6,079,000		6,079,000
Excess tax benefit from stock option exercises	2,773,000		2,773,000
Tax benefit for research and development credits as a result of stock option accounting	103,000		103,000
Net income	32,403,000			32,403,000
Net unrealized loss on available-for- sale investments, net of tax of $276	(1,106,000)				(1,106,000)
Reclassification of net realized gain on the sale of available-for-sale investments	(83,000)				(83,000)
Foreign currency translation adjustment, net of tax of $181	(1,807,000)				(1,807,000)
Ending Balance at Jun. 30, 2013	$ 614,998,000	$ 87,000	$ 190,444,000	$ 456,978,000	$ (32,511,000)
Ending Balance, Shares at Jun. 30, 2013	43,497,000	43,497,000

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Stock-Based Compensation Expense - Summary of Stock Option Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding, Shares	3,559
Granted, Shares	823
Exercised, Shares	(710)
Forfeited or expired, Shares	(122)
Outstanding, Shares	3,550
Exercisable, Shares	1,309
Options vested or expected to vest, Shares	3,139
Outstanding, Weighted-Average Exercise Price	$ 25.56
Granted, Weighted-Average Exercise Price	$ 42.12
Exercised, Weighted-Average Exercise Price	$ 22.88
Forfeited or expired, Weighted-Average Exercise Price	$ 32.53
Outstanding, Weighted-Average Exercise Price	$ 29.70
Exercisable, Weighted-Average Exercise Price	$ 23.03
Options vested or expected to vest, Weighted-Average Exercise Price	$ 28.93
Outstanding, Weighted-Average Remaining Contractual Term (in years)	7 years 4 months 24 days
Exercisable, Weighted-Average Remaining Contractual Term (in years)	5 years 9 months 18 days
Options vested or expected to vest, Weighted-Average Remaining Contractual Term (in years)	7 years 3 months 18 days
Outstanding, Aggregate Intrinsic Value	$ 55,132
Exercisable, Aggregate Intrinsic Value	29,075
Options vested or expected to vest, Aggregate Intrinsic Value	$ 51,172

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Derivative Instruments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Net foreign currency gains (losses)	$ 76	$ (30)	$ 139	$ (668)

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Taxes (Tables)

6 Months Ended

Jun. 30, 2013

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 effective tax rate, or income tax provision, was as follows:

	Three-months Ended						Six-months Ended
	June 30, 2013			July 1, 2012			June 30, 2013			July 1, 2012
Income tax at federal statutory rate		35	%		35	%		35	%		35	%
State income taxes, net of federal benefit		2			1			2			1
Foreign tax rate differential		(17	)		(15	)		(17	)		(15	)
2013 research and development credit		(1	)		—			(1	)		—
Discrete event - 2012 research and development credit		—			—			(1	)		—
Income tax provision		19	%		21	%		18	%		21	%

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Weighted-Average Shares - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Earnings Per Share [Abstract]
Stock options to purchase anti-dilutive common stock	819,407	931,839	634,643	872,237

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Derivative Instruments

6 Months Ended

Jun. 30, 2013

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative Instruments

NOTE 10: Derivative Instruments

The Company is exposed to certain risks relating to its ongoing business operations including foreign currency exchange rate risk and interest rate risk. The Company currently mitigates certain foreign currency exchange rate risks with derivative instruments. The Company does not currently manage its interest rate risk with derivative instruments.

The Company faces exposure to foreign currency exchange rate fluctuations, as a significant portion of its revenues, expenses, assets, and liabilities are denominated in currencies other than the functional currencies of the Company’s subsidiaries or the reporting currency of the Company, which is the U.S. Dollar. The Company faces two types of foreign currency exchange rate exposures:

• Transactional currency/functional currency exchange rate exposures from transactions that are denominated in currencies other than the functional currency of the subsidiary. These transactions gains and losses are reported on the Consolidated Statements of Operations as a component of “Foreign Currency Gain (Loss),”

• Functional currency/reporting currency exchange rate exposures from the revaluation of the assets and liabilities of our foreign subsidiaries, whose functional currency is generally their local currency, to the Company’s reporting currency, which is the U.S. Dollar. The net effect of these translation gains and losses are reported in “Accumulated Other Comprehensive Loss” on the Consolidated Balance Sheets, and also on the Consolidated Statements of Comprehensive Income.

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. Derivative instruments, specifically foreign currency forward contracts with maturities of up to three months, are used to manage the exposure to fluctuations in foreign currency exchange rates that arise primarily from foreign-denominated receivables and payables. As of June 30, 2013, the Company’s forward contracts do not qualify for effective hedge accounting. Because forward contracts are used as an economic hedge, any gain or loss on the underlying foreign-denominated balance is intended to be offset by the loss or gain on the forward contract. Gains and losses on forward contracts and foreign-denominated receivables and payables are included in “Foreign Currency Gain (Loss)” on the Consolidated Statements of Operations. The Company recorded net foreign currency gains of $76,000 and $139,000 in the three-month and six-month periods ended June 30, 2013, respectively, and net foreign currency losses of $30,000 and $668,000 in the three-month and six-month periods ended July 1, 2012, respectively.

As of June 30, 2013, the Company had the following outstanding forward contracts that were entered into to mitigate foreign currency exchange rate risk (in thousands):

Currency	Notional Value		USD Equivalent
Japanese Yen		316,600	$	3,214
Korean Won		275,000		240
Hungarian Forint		99,500		436
Taiwanese Dollar		27,500		920
Swedish Krona		5,700		848
Singapore Dollar		2,500		1,968
British Pound		425		654

Information regarding the fair value of the forward contracts outstanding as of June 30, 2013 and December 31, 2012 was as follows (in thousands):

	Asset Derivatives					Liability Derivatives
		Fair Value					Fair Value
	Balance Sheet Location	June 30, 2013		December 31, 2012		Balance Sheet Location	June 30, 2013		December 31, 2012
Foreign currency forward contracts	Prepaid expenses and other current assets	$	61	$	44	Accrued expenses	$	11	$	14

Information regarding the effect of the forward contracts, net of the underlying exposure, on the Consolidated Statements of Operations for the three-month and six-month periods ended June 30, 2013 and July 1, 2012 was as follows (in thousands):

		Amount of Gain Recognized					Amount of Gain  (Loss) Recognized
		Three-months ended					Six-months ended
	Location of Gain Recognized	June 30, 2013		July 1, 2012		Location of Gain (Loss) Recognized	June 30, 2013		July 1, 2012
Foreign currency forward contracts	Foreign currency gain	$	64	$	198	Foreign currency gain (loss)	$	197	$	(91	)

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Intangible Assets and Goodwill

6 Months Ended

Jun. 30, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Intangible Assets and Goodwill

NOTE 6: Intangible Assets and Goodwill

The Company evaluates the possible impairment of goodwill and other intangible assets whenever events or circumstances indicate that the carrying value of these assets may not be recoverable. No triggering event occurred in the six-month period ended June 30, 2013 that would indicate a potential impairment of goodwill or other intangible assets. However, the Company continues to monitor a variety of factors that could result in an impairment of goodwill or other intangible assets in a future period.

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Taxes

6 Months Ended

Jun. 30, 2013

Income Tax Disclosure [Abstract]

Taxes

NOTE 13: Taxes

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

	Three-months Ended						Six-months Ended
	June 30, 2013			July 1, 2012			June 30, 2013			July 1, 2012
Income tax at federal statutory rate		35	%		35	%		35	%		35	%
State income taxes, net of federal benefit		2			1			2			1
Foreign tax rate differential		(17	)		(15	)		(17	)		(15	)
2013 research and development credit		(1	)		—			(1	)		—
Discrete event - 2012 research and development credit		—			—			(1	)		—
Income tax provision		19	%		21	%		18	%		21	%

During the six-month period ended June 30, 2013, the Company recorded a $918,000 increase in liabilities, net of deferred tax benefit, for uncertain tax positions that were recorded as income tax expense, of which $274,000 was recorded in the three-month period ended June 30, 2013. Estimated interest and penalties included in these amounts totaled $76,000 for the six-month period ended June 30, 2013, of which $38,000 was recorded in the three-month period ended June 30, 2013.

The effective tax rate for the six-month period ended June 30, 2013 includes a discrete event recorded in the first quarter of 2013 for the retroactive application of the 2012 research and development credit. The American Taxpayer Relief Act of 2012 was passed by Congress and signed into law on January 1, 2013. The provisions under this law are to be applied retroactively to January 1, 2012. As a result of the law being signed on January 1, 2013, the financial impact of the retroactive provision was recorded as a discrete event in the first quarter of 2013. The Company recorded a reduction to tax expense in the first quarter of 2013 of $555,000, net of related reserves for uncertain tax positions, for the aforementioned research and development tax credit. Excluding this discrete event, the effective tax rate for the six-month period ended June 30, 2013 was 19%. There were no discrete events in the three-month period ended June 30, 2013 or in the six-month period ended July 1, 2012.

The Company’s reserve for income taxes, including gross interest and penalties, was $6,255,000 as of June 30, 2013, all of which was classified as noncurrent. The amount of gross interest and penalties included in these balances was $1,303,000. 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, less $405,000 that would be recorded through additional paid in capital. 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 $1,600,000 to $1,800,000 over the next twelve months.

The Company has defined its major tax jurisdictions as the United States, Ireland, China, and Japan, and within the United States, Massachusetts and California. Within the United States, the tax years 2006 through 2012 remain open to examination by various taxing authorities due to a 2009 carryback claim, while the tax years 2008 through 2012 remain open to examination by various taxing authorities in other jurisdictions in which the Company operates. The Company has recently been notified by the Internal Revenue Service that its U.S. Federal tax returns for years 2010 and 2011 are under audit. The Company believes it is adequately reserved for these years.

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Stock-Based Compensation Expense

6 Months Ended

Jun. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation Expense

NOTE 11: Stock-Based Compensation Expense

The Company’s share-based payments that result in compensation expense consist solely of stock option grants. As of June 30, 2013, the Company had 5,614,591 shares available for grant under two stock option plans: the 2001 General Stock Option Plan (4,355,481) and the 2007 Stock Option and Incentive Plan (1,259,110). Each of these plans expires ten years from the date the plan was approved. In December 2011, the 2001 General Stock Option Plan received shareholder approval for an amendment and restatement of the plan, extending the plan until September 2021. Generally, stock options are granted with an exercise price equal to the market value of the Company’s common stock at the grant date, vest over four years based upon continuous service, and expire ten years from the grant date.

The following table summarizes the Company’s stock option activity for the six-month period ended June 30, 2013:

	Shares (in  thousands)			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2012		3,559		$	25.56
Granted		823			42.12
Exercised		(710	)		22.88
Forfeited or expired		(122	)		32.53
Outstanding as of June 30, 2013		3,550		$	29.70		7.4	$	55,132
Exercisable as of June 30, 2013		1,309		$	23.03		5.8	$	29,075
Options vested or expected to vest at June 30, 2013 (1)		3,139		$	28.93		7.3	$	51,172

(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						Six-months Ended
	June 30, 2013			July 1, 2012			June 30, 2013			July 1, 2012
Risk-free rate		2.0	%		2.0	%		2.0	%		2.0	%
Expected dividend yield		0	%		1.2	%		0	%		1.2	%
Expected volatility		42	%		44	%		42	%		44	%
Expected term (in years)		5.9			5.7			5.9			5.7

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. However, in the fourth quarter of 2012, the Company paid the full annual dividends for 2013 and 2014 in advance, and therefore, the dividend yield for those years has been adjusted to zero. At the time of the 2013 valuation, a dividend yield of 1.04% was estimated for future periods from 2015 through the expected life of the option.

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 weighted-average grant-date fair values of stock options granted during the three-month periods ended June 30, 2013 and July 1, 2012 were $16.13 and $13.50, respectively. The weighted-average grant-date fair values of stock options granted during the six-month periods ended June 30, 2013 and July 1, 2012 were $16.13 and $13.35, respectively.

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 71% of its stock options granted to senior management and 69% of its options granted to all other employees will actually vest. Therefore, the Company currently applies an estimated forfeiture rate of 12% to all unvested options for senior management and a rate of 13% for all other employees.

The total stock-based compensation expense and the related income tax benefit recognized for the three-month period ended June 30, 2013 were $2,781,000 and $911,000, respectively, and for the three-month period ended July 1, 2012 were $1,989,000 and $646,000, respectively. The total stock-based compensation expense and the related income tax benefit recognized for the six-month period ended June 30, 2013 were $6,079,000 and $2,004,000, respectively, and for the six-month period ended July 1, 2012 were $5,303,000 and $1,733,000, respectively. No compensation expense was capitalized as of June 30, 2013 or December 31, 2012.

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

	Three-months Ended				Six-months Ended
	June 30, 2013		July 1, 2012		June 30, 2013		July 1, 2012
Product cost of revenue	$	177	$	135	$	404	$	375
Service cost of revenue		47		40		110		108
Research, development, and engineering		650		483		1,463		1,350
Selling, general, and administrative		1,907		1,331		4,102		3,470
	$	2,781	$	1,989	$	6,079	$	5,303

The total intrinsic values of stock options exercised for the three-month periods ended June 30, 2013 and July 1, 2012 were $6,759,000 and $672,000, respectively. The total intrinsic values of stock options exercised for the six-month periods ended June 30, 2013 and July 1, 2012 were $13,952,000 and $13,308,000, respectively. The total fair values of stock options vested for the three-month periods ended June 30, 2013 and July 1, 2012 were $2,298,000 and $2,286,000, respectively. The total fair values of stock options vested for the six-month periods ended June 30, 2013 and July 1, 2012 were $9,230,000 and $8,686,000, respectively.

As of June 30, 2013, total unrecognized compensation expense related to non-vested stock options was $12,233,000, which is expected to be recognized over a weighted-average period of 1.6 years.

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Document and Entity Information	6 Months Ended
	Jun. 30, 2013
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Entity Registrant Name	COGNEX CORP
Entity Central Index Key	0000851205
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	43,496,801

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Stock Repurchase Program

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Stock Repurchase Program

NOTE 12: Stock Repurchase Program

In April 2008, the Company’s Board of Directors authorized the repurchase of up to $50,000,000 of the Company’s common stock, primarily as a means to reduce the dilutive effect of employee stock options. As of June 30, 2013, the Company had repurchased a total of 1,643,875 shares at a cost of $41,891,000 under this program, including 268,000 shares at a cost of $11,891,000 in the second quarter of 2013. In November 2011, the Company’s Board of Directors authorized the repurchase of up to $80,000,000 of the Company’s common stock to help reduce share dilution associated with equity incentive plans. This new authorization will commence once the Company completes the $50,000,000 program noted above, of which $8,109,000 remains available. The Company may repurchase shares under these programs in future periods depending upon a variety of factors, including, among other things, stock price, share availability, and cash requirements.

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Segment Information - Information About Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Segment Reporting Information [Line Items]
Product revenue	$ 79,698	$ 78,449	$ 154,370	$ 149,856
Service revenue	6,812	5,877	13,032	12,179
Operating income	20,173	23,350	38,154	41,091
MVSD [Member]
Segment Reporting Information [Line Items]
Product revenue	72,012	69,743	140,331	133,964
Service revenue	2,301	1,778	4,393	3,698
Operating income	23,527	25,035	45,603	46,179
SISD [Member]
Segment Reporting Information [Line Items]
Product revenue	7,686	8,706	14,039	15,892
Service revenue	4,511	4,099	8,639	8,481
Operating income	2,227	2,848	3,959	5,240
Reconciling Items [Member]
Segment Reporting Information [Line Items]
Operating income	$ (5,581)	$ (4,533)	$ (11,408)	$ (10,328)

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Segment Information - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2013 Segment
Segment Reporting [Abstract]
Number of reportable segments	2