Cadence Design Systems (CDNS) 10-K 20 Feb 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 30, 2017	Feb. 03, 2018	Jul. 01, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	CADENCE DESIGN SYSTEMS INC
Entity Central Index Key	813,672
Document Type	10-K
Document Period End Date	Dec. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-30
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 9,383,931,490
Entity Common Stock, Shares Outstanding		282,869,000

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 688,087	$ 465,232
Short-term investments	4,455	3,057
Receivables, net	190,426	157,171
Inventories	33,209	39,475
Prepaid expenses and other	63,811	37,099
Total current assets	979,988	702,034
Property, plant and equipment, net	251,342	238,607
Goodwill	666,009	572,764
Acquired intangibles, net	278,835	258,814
Long-term receivables	12,239	12,949
Other assets	230,301	311,740
Total assets	2,418,714	2,096,908
Current liabilities:
Revolving credit facility	85,000	50,000
Accounts payable and accrued liabilities	221,101	239,496
Current portion of deferred revenue	336,297	296,066
Total current liabilities	642,398	585,562
Long-term liabilities:
Long-term portion of deferred revenue	61,513	66,769
Long-term debt	644,369	643,493
Other long-term liabilities	81,232	59,314
Total long-term liabilities	787,114	769,576
Commitments and contingencies
Stockholders' equity:
Preferred stock - $0.01 par value; authorized 400 shares, none issued or outstanding	0	0
Common stock - $0.01 par value; authorized 600,000 shares; issued and outstanding shares: 282,067 and 278,099, respectively	1,829,950	1,820,081
Treasury stock, at cost; 47,092 shares and 51,061 shares, respectively	(1,178,121)	(1,190,053)
Accumulated deficit	341,003	136,902
Accumulated other comprehensive income	(3,630)	(25,160)
Total stockholders' equity	989,202	741,770
Total liabilities and stockholders' equity	$ 2,418,714	$ 2,096,908

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Preferred stock par value (in usd per share)	$ 0.01	$ 0.01
Preferred stock shares authorized (in shares)	400,000	400,000
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	600,000,000	600,000,000
Common stock shares issued (in shares)	282,067,000	278,099,000
Common stock shares outstanding (in shares)	282,067,000	278,099,000
Treasury stock (in shares)	47,092,000	51,061,000

Consolidated Income Statements

Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Revenue:
Product and maintenance	$ 1,813,987	$ 1,683,771	$ 1,578,944
Services	129,045	132,312	123,147
Total revenue	1,943,032	1,816,083	1,702,091
Costs and expenses:
Cost of product and maintenance	156,676	183,291	155,659
Cost of service	80,714	73,201	82,794
Marketing and sales	419,161	395,194	402,432
Research and development	804,223	735,340	637,567
General and administrative	134,181	125,106	109,982
Amortization of acquired intangibles	14,716	18,095	23,716
Restructuring and other charges	9,406	40,955	4,511
Total costs and expenses	1,619,077	1,571,182	1,416,661
Income from operations	323,955	244,901	285,430
Interest expense	(25,664)	(23,670)	(28,311)
Other income, net	16,755	15,922	10,477
Income before provision for income taxes	315,046	237,153	267,596
Provision for income taxes	110,945	34,067	15,179
Net income	$ 204,101	$ 203,086	$ 252,417
Net income per share - basic (in usd per share)	$ 0.75	$ 0.71	$ 0.88
Net income per share - diluted (in usd per share)	$ 0.73	$ 0.70	$ 0.81
Weighted average common shares outstanding - basic (shares)	272,097	284,502	288,018
Weighted average common shares outstanding - diluted (shares)	280,221	291,256	312,302

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 204,101	$ 203,086	$ 252,417
Other comprehensive income (loss), net of tax effects:
Foreign currency translation adjustments	19,394	(12,801)	(25,276)
Changes in unrealized holding gains or losses on available-for-sale securities, net of reclassification adjustments for realized gains and losses	1,712	716	169
Changes in defined benefit plan liabilities	424	(650)	335
Total other comprehensive income (loss), net of tax effects	21,530	(12,735)	(24,772)
Comprehensive income	$ 225,631	$ 190,351	$ 227,645

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock, Shares	Common Stock, Par Value and Capital in Excess of Par	Treasury Stock	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Jan. 03, 2015	$ 1,333,574		$ 1,851,427	$ (203,792)	$ (326,408)	$ 12,347
Beginning balance, shares at Jan. 03, 2015		291,584
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	252,417				252,417
Other comprehensive loss, net of taxes	$ (24,772)					(24,772)
Purchase of treasury stock, shares	(16,255)	(16,255)
Purchase of treasury stock	$ (333,189)			(333,189)
Issuance of common stock and reissuance of treasury stock under equity incentive plans, net of forfeitures, shares		12,399
Issuance of common stock and reissuance of treasury stock under equity incentive plans, net of forfeitures	74,711		(90,542)	165,253
Issuance of common shares for settlement of warrants		23,122
Stock received for payment of employee taxes on vesting of restricted stock	(33,651)		(4,824)	(28,827)
Stock received for payment of employee taxes on vesting of restricted stock, shares		(1,458)
Tax benefit from stock-based compensation	14,684		14,684
Stock-based compensation expense	92,341		92,341
Ending balance at Jan. 02, 2016	1,376,115		1,863,086	(400,555)	(73,991)	(12,425)
Ending balance, shares at Jan. 02, 2016		309,392
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment	8,171		364		7,807
Net income	203,086				203,086
Other comprehensive loss, net of taxes	$ (12,735)					(12,735)
Purchase of treasury stock, shares	(40,493)	(40,493)
Purchase of treasury stock	$ (960,289)			(960,289)
Issuance of common stock and reissuance of treasury stock under equity incentive plans, net of forfeitures, shares		10,587
Issuance of common stock and reissuance of treasury stock under equity incentive plans, net of forfeitures	55,432		(147,074)	202,506
Stock received for payment of employee taxes on vesting of restricted stock	(37,227)		(5,512)	(31,715)
Stock received for payment of employee taxes on vesting of restricted stock, shares		(1,387)
Stock-based compensation expense	109,217		109,217
Ending balance at Dec. 31, 2016	$ 741,770		1,820,081	(1,190,053)	136,902	(25,160)
Ending balance, shares at Dec. 31, 2016	278,099	278,099
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 204,101				204,101
Other comprehensive loss, net of taxes	$ 21,530					21,530
Purchase of treasury stock, shares	(2,495)	(2,495)
Purchase of treasury stock	$ (100,025)			(100,025)
Issuance of common stock and reissuance of treasury stock under equity incentive plans, net of forfeitures, shares		7,905
Issuance of common stock and reissuance of treasury stock under equity incentive plans, net of forfeitures	48,964		(111,982)	160,946
Stock received for payment of employee taxes on vesting of restricted stock	(57,161)		(8,172)	(48,989)
Stock received for payment of employee taxes on vesting of restricted stock, shares		(1,442)
Stock-based compensation expense	130,023		130,023
Ending balance at Dec. 30, 2017	$ 989,202		$ 1,829,950	$ (1,178,121)	$ 341,003	$ (3,630)
Ending balance, shares at Dec. 30, 2017	282,067	282,067

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Statement of Cash Flows [Abstract]
Cash and cash equivalents at beginning of year	$ 465,232	$ 616,686	$ 932,161
Cash flows from operating activities:
Net income	204,101	203,086	252,417
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	115,524	119,588	118,165
Amortization of debt discount and fees	1,211	1,069	9,402
Stock-based compensation	130,023	109,217	92,341
Gain on investments, net	(13,869)	(4,725)	(2,124)
Gain on sale of property, plant and equipment	0	(923)	0
Deferred income taxes	79,934	(4,869)	(13,148)
Other non-cash items	5,068	4,027	646
Changes in operating assets and liabilities, net of effect of acquired businesses:
Receivables	(28,409)	(3,299)	(44,732)
Inventories	5,034	4,934	(1,120)
Prepaid expenses and other	(25,793)	(6,903)	(1,380)
Other assets	(22,336)	(6,566)	(1,558)
Accounts payable and accrued liabilities	(25,987)	2,655	15,321
Deferred revenue	33,614	30,742	(27,019)
Other long-term liabilities	12,625	(3,154)	(19,011)
Net cash provided by operating activities	470,740	444,879	378,200
Cash flows from investing activities:
Purchases of available-for-sale securities	0	(20,525)	(96,531)
Proceeds from the sale of available-for-sale securities	833	55,619	60,949
Proceeds from the maturity of available-for-sale securities	0	57,762	31,316
Proceeds from the sale of long-term investments	9,108	2,917	4,570
Proceeds from the sale of property, plant and equipment	0	923	0
Purchases of property, plant and equipment	(57,901)	(53,712)	(44,808)
Cash paid in business combinations and asset acquisitions, net of cash acquired	(143,249)	(41,627)	0
Net cash provided by (used for) investing activities	(191,209)	1,357	(44,504)
Cash flows from financing activities:
Proceeds from term loan	0	300,000	0
Proceeds from revolving credit facility	135,000	115,000	0
Payment on revolving credit facility	(100,000)	(65,000)	0
Payment of convertible notes	0	0	(349,999)
Payment of convertible notes embedded conversion derivative liability	0	0	(530,643)
Proceeds from convertible notes hedges	0	0	530,643
Payment of debt issuance costs	(793)	(622)	0
Excess tax benefits from stock-based compensation	0	0	15,591
Proceeds from issuance of common stock	48,965	55,440	74,938
Stock received for payment of employee taxes on vesting of restricted stock	(57,161)	(37,226)	(33,651)
Payments for repurchases of common stock	(100,025)	(960,289)	(333,189)
Change in book overdraft	3,867	0	0
Net cash used for financing activities	(70,147)	(592,697)	(626,310)
Effect of exchange rate changes on cash and cash equivalents	13,471	(4,993)	(22,861)
Increase (decrease) in cash and cash equivalents	222,855	(151,454)	(315,475)
Cash and cash equivalents at end of year	688,087	465,232	616,686
Supplemental cash flow information:
Cash paid for interest	24,160	21,024	19,918
Cash paid for income taxes, net	$ 59,072	$ 36,823	$ 29,494

Business Overview

Business Overview	12 Months Ended
	Dec. 30, 2017
Accounting Policies [Abstract]
BUSINESS OVERVIEW	BUSINESS OVERVIEW Cadence Design Systems, Inc. (“Cadence”) provides solutions that enable its customers to design complex and innovative electronic products. Cadence’s solutions are designed to give its customers a competitive edge in their development of electronic systems, integrated circuits (“ICs”) and electronic devices and increasingly sophisticated manufactured products, by optimizing performance, minimizing power consumption, shortening the time to bring their products to market and reducing their design, development and manufacturing costs. Cadence’s product offerings include electronic design automation software, emulation and prototyping hardware, system interconnect and analysis and two categories of intellectual property (“IP”), commonly referred to as verification IP and design IP. Cadence provides maintenance for its software, emulation and prototyping hardware, and IP product offerings. Cadence also provides engineering services related to methodology, education, hosted design solutions and design services for advanced ICs and development of custom IP.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 30, 2017
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation and Basis of Presentation The consolidated financial statements include the accounts of Cadence and its subsidiaries after elimination of intercompany accounts and transactions. All consolidated subsidiaries are wholly owned by Cadence. Certain prior period balances have been reclassified to conform to the current period presentation. Cadence’s fiscal years are 52- or 53-week periods ending on the Saturday closest to December 31. Fiscal 2017, 2016 and 2015 were each 52-week fiscal years. Use of Estimates Preparation of the consolidated financial statements in conformity with United States generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. New Accounting Standards Not Yet Adopted Revenue Recognition In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers (Topic 606),” which supersedes the revenue recognition requirements in “Revenue Recognition (Topic 605).” Under Topic 606, revenue is recognized when a customer obtains control of promised goods or services and is recognized in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services. In addition, Topic 606 requires enhanced disclosures, including disclosure of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The FASB has recently issued several amendments to the standard, including clarification on accounting for licenses of intellectual property and identifying performance obligations. Topic 606 permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or modified retrospectively with the cumulative effect of applying the guidance as of the date of initial application (the cumulative catch-up transition method). Cadence will adopt the standard using the cumulative catch-up transition method. Topic 606 is effective for Cadence beginning with the first quarter of fiscal 2018. The most significant impacts of the adoption of Topic 606 are as follows: • Cadence’s revenue mix is expected to remain approximately 90% recognizable over time under Topic 606, as it was under Topic 605; • The use of the cumulative catch-up method upon adoption of Topic 606 requires Cadence to evaluate only contracts that were in effect at the beginning of fiscal 2018 as if those contracts had been accounted for under Topic 606 from the beginning of their terms; • Cadence expects that approximately 3% of its existing backlog at the beginning of fiscal 2018 will be adjusted through retained earnings upon adoption of Topic 606 and such backlog will not be recognized as revenue in future periods under Topic 606. Because this revenue would have been recognized in prior periods had Topic 606 then been in effect, Cadence will also have related changes to its accounts receivable and deferred revenue balances; • Because of the transition method, revenue generated under Topic 606 is expected to be slightly lower than revenue would have been under Topic 605 in 2018; and • In 2018, the year of adoption, Cadence will report revenue under Topic 606 with supplemental disclosures of what revenue would have been under Topic 605. Cadence will continue to recognize revenue over time for its time-based software arrangements, which represents a large majority of its total revenue, because the multiple software licenses and related updates in its time-based arrangements constitute a single, combined performance obligation. The timing of revenue recognition for its hardware and professional services is expected to remain substantially unchanged. The adoption of Topic 606 will impact Cadence’s accounting for multiple element arrangements (“MEAs”) that combine many software-related deliverables, which may include multiple software contracts with varying terms, IP licenses, and/or service elements. Topic 605 requires vendor specific objective evidence (“VSOE”) to recognize revenue separately for the different undelivered elements. Cadence has not established VSOE under Topic 605, thus the revenue related to these agreements is generally recognized over time beginning with the delivery of the last specified deliverable and ending on the latest end date. Topic 606 requires Cadence to separate the different elements through the use of stand-alone selling prices (“SSPs”), and to recognize the revenue allocated to the different elements as if those elements had been sold on a standalone basis, either up front or over time. Certain IP license agreements will be recognized up front under Topic 606, as opposed to over time under Topic 605. In addition, certain software agreements will be recognized over time under Topic 606, as opposed to up front under Topic 605. Despite these changes, Cadence expects its revenue mix will be similar, such that approximately 90% of its revenue is recognized over time. More judgments and estimates are required under Topic 606 than are required under Topic 605, including estimating the SSP for each performance obligation identified within Cadence’s contracts. Due to the complexity of certain contracts, the actual revenue recognition treatment required under the new standard for these arrangements may be dependent on contract-specific terms and vary in some instances. Under the cumulative catch-up transition method, Cadence has evaluated its contracts that were in effect on the adoption date as if they had been accounted for under Topic 606 from contract inception. Some revenue related to the MEAs and IP arrangements noted above that would have been recognized in future periods under Topic 605 will be recast under Topic 606 as if the revenue had been recognized in prior periods. As this transition method requires that Cadence not adjust historical reported revenue amounts, the revenue that would have been recognized under this method prior to the adoption date will be an adjustment to retained earnings and will not be recognized as revenue in future periods as previously planned. Because of this transition method, approximately 3% of Cadence’s year-end backlog will be adjusted to retained earnings upon adoption. Topic 606 also requires the deferral of incremental costs of obtaining a contract with a customer. This requires that Cadence capitalize commission costs that are directly related to obtaining customer contracts and amortize them over the life of the contract. Cadence anticipates the amount of the amortization of capitalized commissions under Topic 606 will be similar to the amount of commissions expense for fiscal 2018 bookings under Topic 605 and will not have a significant impact on its consolidated income statements. Cash, Cash Equivalents and Short-Term Investments Cadence considers all highly liquid investments with original maturities of three months or less on the date of purchase to be cash equivalents. Book overdraft balances are recorded in accounts payable and accrued liabilities in the consolidated balance sheets and are reported as a component of cash flows from financing activities in the consolidated statement of cash flows. Cadence’s short-term investments consist of marketable equity securities that are classified as available for sale. Available-for-sale equity securities are carried at fair value, with the unrealized gains and losses presented net of tax as a separate component of other comprehensive income. Unrealized and realized gains and losses are determined using the specific identification method. Cadence recognizes gains on its available-for-sale securities when they are realized. Cadence recognizes losses on its available-for-sale securities when they are realized or when Cadence has determined that an other-than-temporary decline in fair value has occurred. Cadence records realized gains, realized losses and other-than-temporary impairments as part of other income, net in the consolidated income statements. Foreign Operations Cadence transacts business in various foreign currencies. The United States dollar is the functional currency of Cadence’s consolidated entities operating in the United States and certain of its consolidated subsidiaries operating outside the United States. The functional currency for Cadence’s other consolidated entities operating outside of the United States is generally the country’s local currency. Cadence translates the financial statements of consolidated entities whose functional currency is not the United States dollar into United States dollars. Cadence translates assets and liabilities at the exchange rate in effect as of the financial statement date and translates income statement accounts using an average exchange rate for the period. Cadence includes adjustments from translating assets and liabilities into United States dollars, and the effect of exchange rate changes on intercompany transactions of a long-term investment nature in stockholders’ equity as a component of accumulated other comprehensive income. Cadence reports gains and losses from foreign exchange rate changes related to intercompany receivables and payables that are not of a long-term investment nature, as well as gains and losses from foreign currency transactions of a monetary nature in other income, net, in the consolidated income statements. Revenue Recognition Software and IP Revenue Recognition Cadence primarily uses time-based licenses to license its software. Certain software and IP products are licensed using a perpetual license. Time-based licenses - Cadence’s time-based license arrangements offer customers the right to access and use all of the products delivered at the outset of an arrangement and updates throughout the entire term of the arrangement, which is generally two to three years, with no rights to return. Cadence’s updates provide for continued access to evolving technology as customers’ designs migrate to more advances nodes. In addition, certain time-based license arrangements include: • Remix among the products delivered at the outset of the arrangement, so long as the cumulative contractual value of all products in use does not exceed the total license fee determined at the outset of the arrangement; and • Use of unspecified additional products that become commercially available during the term of the arrangement. In general, product and maintenance revenue associated with time-based licenses is recognized over the term of the license, commencing upon the later of the effective date of the arrangement or delivery of the licensed product. Perpetual licenses - Cadence’s perpetual licenses consist of software licensed on a perpetual basis with no right to return or ability to remix the licensed software. Cadence licenses its design IP under a perpetual license on a per-design basis. In general, product revenue associated with perpetual licenses where VSOE exists for the undelivered maintenance is recognized upon delivery of the licensed product, and maintenance revenue is recognized ratably over the maintenance term. If VSOE does not exist for the undelivered maintenance in a perpetual license, product revenue is recognized over the maintenance term. If certain other criteria are met, revenue for design IP is recognized upon delivery and we accrue the expected costs of maintenance. Hardware Revenue Recognition Cadence generally has a minimum of two deliverables in arrangements involving the sale or lease of its hardware products. The first deliverable is the hardware product and software essential to the functionality of the hardware product, and the second deliverable is the right to receive maintenance on the hardware product and its software. Cadence allocates consideration between these deliverables based on the relative standalone selling price for each deliverable. Consideration allocated to the hardware product and its essential software is recognized as revenue at the time of delivery provided all other conditions for revenue recognition have been met. Consideration allocated to maintenance is recognized as revenue ratably over the maintenance term. Services Revenue Recognition Services revenue primarily consists of revenue received for performing engineering services. These services are generally not related to the functionality of the products licensed. In certain instances, Cadence will customize its IP on a fixed fee basis. Revenue from service contracts is recognized either on the time and materials method, as work is performed, or on the percentage-of-completion method. If a service contract is considered to be part of an MEA that includes a software contract, revenue is generally recognized over the duration of the software contract. For contracts with fixed or not-to-exceed fees, Cadence estimates on a monthly basis the percentage-of-completion based on the progress to completion of the services. Cadence has a history of accurately estimating project status and the costs necessary to complete projects. A number of internal and external factors can affect these estimates, including labor rates, utilization and efficiency variances and specification and testing requirement changes. If different conditions were to prevail such that accurate estimates could not be made, then the use of the completed contract method would be required and the recognition of all revenue and costs would be deferred until the project was completed. Such a change could have a material impact on Cadence’s results of operations. Revenue Recognition Criteria Although the timing and amount of revenue recognition differs based on the deliverables in each arrangement, Cadence begins revenue recognition for an arrangement when persuasive evidence of an arrangement exists, delivery has occurred, the fee is fixed or determinable, and collection of the resulting receivable is probable. Persuasive evidence of an arrangement - Generally, Cadence uses a contract signed by the customer as evidence of an arrangement for time-based licenses, licenses of its IP products and hardware leases. If a contract signed by the customer does not exist, Cadence has historically used a purchase order as evidence of an arrangement for software perpetual licenses, hardware sales, maintenance renewals and small fixed-price service projects, such as training classes and small methodology service engagements. For all other service engagements, Cadence uses a signed professional services agreement and a statement of work to evidence an arrangement. In cases where both a signed contract and a purchase order exist, Cadence considers the signed contract to be the most persuasive evidence of the arrangement. Sales through Cadence’s distributors are evidenced by a master agreement governing the relationship, together with binding purchase orders from the distributor on a transaction-by-transaction basis. Product delivery - Software and VIP, and the corresponding access keys, are generally delivered to customers electronically. Electronic delivery occurs when Cadence provides the customer access to the software. Occasionally, Cadence will deliver software on a DVD with standard transfer terms of free-on-board (“F.O.B.”) shipping point. Design IP is also delivered electronically via download from a secure site. Cadence’s software and IP license agreements generally do not contain conditions for acceptance. Delivery of an entire hardware system is deemed to occur upon its successful installation. For certain hardware products, installation is the responsibility of the customer, as the system is fully functional at the time of shipment and delivery is deemed to be complete when the products are shipped with freight terms of F.O.B. shipping point. Fee is fixed or determinable - Cadence assesses whether a fee is fixed or determinable at the outset of the arrangement, primarily based on the payment terms associated with the transaction. Cadence has established a history of collecting under the original contract without providing concessions on payments, products or services. For contracts that do not include a substantial upfront payment, Cadence considers that a fee is fixed or determinable if the arrangement has payment periods that are equal to or less than the term of the licenses and the payments are collected in equal or nearly equal installments, when evaluated over the entire term of the arrangement. Cadence has a history of collecting receivables under software contracts of up to five years for which the fee has been assessed as fixed or determinable. Significant judgment is involved in assessing whether a fee is fixed or determinable. Cadence must also make these judgments when assessing whether a contract amendment to a time-based arrangement (primarily in the context of a license extension or renewal) constitutes a concession. Cadence’s experience has been that it is able to determine whether a fee is fixed or determinable. While Cadence does not expect that experience to change, if Cadence no longer were to have a history of collecting under the original contract without providing concessions, revenue would be required to be recognized when payments become due and payable. Such a change could have a material impact on Cadence’s results of operations. Collection is probable - Cadence assesses the probability of collecting from each customer at the outset of the arrangement based on a number of factors, including the customer’s payment history, its current creditworthiness and geographic location. If in Cadence’s judgment collection of a fee is not probable, Cadence does not record revenue until the uncertainty is removed, which is generally upon receipt of cash payment. Multiple Element Arrangements An MEA is any arrangement that includes or contemplates rights for a combination of software, IP or hardware products, services, training or maintenance in a single arrangement. From time to time, Cadence may include individual deliverables in separately priced and separately executed contracts with the same customer. Cadence evaluates all relevant facts and circumstances in determining whether the separate contracts should be accounted for individually as distinct arrangements or whether the separate contracts are, in substance, an MEA. Significant judgment is involved in determining whether a group of contracts might be so closely related that they are, in effect, part of a single arrangement. Cadence’s judgments about whether several contracts together comprise an MEA can affect the timing of revenue recognition under those contracts, which could have an effect on its results of operations for the periods involved. For an MEA that includes software and nonsoftware elements, Cadence allocates the total consideration based on the relative standalone selling prices of each element. In these circumstances, Cadence is required to use a hierarchy to determine the standalone selling price to be used for allocating consideration to deliverables as follows: • VSOE of fair value; • Third-party evidence of selling price (“TPE”); and • Best estimate of the selling price (“BESP”). Vendor-specific objective evidence of fair value - Cadence’s VSOE for maintenance is based upon the customer’s stated annual renewal rates and VSOE for services is based on the price charged when the services are sold separately. Cadence has not established VSOE for certain products, including software and IP licenses and hardware products, or for annual maintenance that is not cancellable by the customer. Third-party evidence of selling price - TPE is determined based on competitor prices for similar deliverables when sold separately. Generally, Cadence’s offerings contain significant differentiation such that comparable pricing of products with similar functionality cannot be obtained. Furthermore, Cadence is unable to reliably determine what similar competitor products’ selling prices are when those products are sold on a standalone basis. Therefore, Cadence typically is not able to obtain TPE and TPE is not used to determine any standalone selling prices. Best estimate of the selling price - Cadence calculates the BESP of its hardware products based on its pricing practices, including the historical average prices charged for comparable hardware products. Cadence’s process for determining BESP for its software deliverables takes into account multiple factors that vary depending upon the unique facts and circumstances related to each deliverable. Key external and internal factors considered in developing the BESPs include prices charged by Cadence for similar arrangements, historical pricing practices and the nature of the product. In addition, when developing BESPs, Cadence may consider other factors as appropriate, including the pricing of competitive alternatives if they exist, and product-specific business objectives. For MEAs that contain software and nonsoftware elements, Cadence allocates the consideration to software or software-related elements as a group, and to any nonsoftware element separately based on the standalone selling price hierarchy. The consideration allocated to each element is then recognized as revenue when the basic revenue recognition criteria are met for each element. Once the consideration is allocated to the group of software and software-related elements, it then follows the recognition principles of software revenue recognition accounting standards. For MEAs involving only software and software-related deliverables, VSOE must exist to allocate the total fee among all delivered and undelivered elements, or if VSOE of all undelivered elements exists, revenue is recognized using the residual method. Under the residual method, the VSOE of the undelivered elements is deferred and the remaining portion of the arrangement fee is recognized up front as the elements are delivered. If VSOE does not exist for all elements to support the allocation of the total fee among all elements of the arrangement, or if VSOE does not exist for all undelivered elements to apply the residual method, revenue is recognized over the term of the undelivered elements. Other Factors Regarding Revenue Recognition Taxes collected from customers and remitted to governmental authorities - Cadence applies the net basis presentation for taxes collected from customers and remitted to governmental authorities. Derivative Financial Instruments Cadence enters into foreign currency forward exchange contracts with financial institutions to protect against currency exchange risks associated with existing assets and liabilities. A foreign currency forward exchange contract acts as a hedge by increasing in value when underlying assets decrease in value or underlying liabilities increase in value due to changes in foreign exchange rates. Conversely, a foreign currency forward exchange contract decreases in value when underlying assets increase in value or underlying liabilities decrease in value due to changes in foreign exchange rates. The forward contracts are not designated as accounting hedges and, therefore, the unrealized gains and losses are recognized in other income, net, in advance of the actual foreign currency cash flows. The fair value of these forward contracts is recorded in accrued liabilities or in other current assets. These forward contracts generally have maturities of 90 days or less. Receivables Cadence’s receivables, net includes invoiced accounts receivable and the current portion of unbilled receivables. Unbilled receivables represent amounts Cadence has recorded as revenue for which payments from a customer are due over time. Cadence’s accounts receivable and unbilled receivables were initially recorded at the transaction value. Cadence’s long-term receivables balance includes receivable balances to be invoiced more than one year after each balance sheet date. Allowances for Doubtful Accounts Each fiscal quarter, Cadence assesses its ability to collect outstanding receivables, and provides allowances for a portion of its receivables when collection is not probable. Cadence analyzes the creditworthiness of its customers, historical experience, changes in customer demand and the overall economic climate in the industries that Cadence serves. Provisions are made based upon a specific review of customer receivables and are recorded in operating expenses. Inventories Inventories are stated at the lower of cost or market value. Cadence’s inventories include high technology parts and components for complex emulation and prototyping hardware systems. These parts and components are specialized in nature and may be subject to rapid technological obsolescence. While Cadence has programs to minimize the required inventories on hand and considers technological obsolescence when estimating required reserves to reduce recorded amounts to market values, it is reasonably possible that such estimates could change in the near term. Cadence’s policy is to reserve for inventory in excess of 12-month demand or for other known obsolescence or realization issues. Property, Plant and Equipment Property, plant and equipment is stated at historical cost. Depreciation and amortization are generally provided over the estimated useful lives, using the straight-line method, as follows: Computer equipment and related software 2-7 years Buildings 25-32 years Leasehold improvements Shorter of the lease term or the estimated useful life Building improvements and land improvements Estimated useful life up to 32 years Furniture and fixtures 3-5 years Equipment 3-5 years Cadence capitalizes certain costs of software developed for internal use. Capitalization of software developed for internal use begins at the application development phase of the project. Amortization begins when the computer software is substantially complete and ready for its intended use. Amortization is recorded on a straight-line basis over the estimated useful life. Cadence capitalized costs of software developed for internal use of $2.2 million , $3.5 million , and $2.0 million during fiscal 2017 , 2016 and 2015 , respectively. Cadence recorded depreciation and amortization expense of $52.9 million , $52.7 million and $48.7 million during fiscal 2017 , 2016 and 2015 , respectively, for property, plant and equipment. Software Development Costs Software development costs are capitalized beginning when a product’s technological feasibility has been established by completion of a working model of the product and amortization begins when a product is available for general release to customers. The period between the achievement of technological feasibility and the general release of Cadence’s products has typically been of short duration. Costs incurred during fiscal 2017 , 2016 and 2015 were not material. Goodwill Cadence conducts a goodwill impairment analysis annually and as necessary if changes in facts and circumstances indicate that the fair value of Cadence’s single reporting unit may be less than its carrying amount. Cadence’s goodwill impairment test consists of two steps. The first step requires that Cadence compare the estimated fair value of its single reporting unit to the carrying value of the reporting unit’s net assets, including goodwill. If the fair value of the reporting unit is greater than the carrying value of its net assets, goodwill is not considered to be impaired and no further testing is required. If the fair value of the reporting unit is less than the carrying value of its net assets, Cadence would be required to complete the second step of the test by analyzing the fair value of its goodwill. If the carrying value of the goodwill exceeds its fair value, an impairment charge is recorded. Long-Lived Assets, Including Acquired Intangibles Cadence’s long-lived assets consist of property, plant and equipment and acquired intangibles. Acquired intangibles with definite lives are amortized on a straight-line basis over the estimated economic life of the underlying products and technologies, which range from two to fourteen years. Acquired intangibles with indefinite lives, or in-process technology, consists of projects that had not reached technological feasibility by the date of acquisition. Upon completion of the project, the assets are amortized over their estimated useful lives. If the project is abandoned rather than completed, the asset is written off. In-process technology is tested for impairment annually and as necessary if changes in facts and circumstances indicate that the assets might be impaired. Cadence reviews its long-lived assets, including acquired intangibles for impairment whenever events or changes in circumstances indicate that the carrying amount of a long-lived asset or asset group may not be recoverable. Recoverability of an asset or asset group is measured by comparison of its carrying amount to the expected future undiscounted cash flows that the asset or asset group is expected to generate. If it is determined that the carrying amount of an asset group is not recoverable, an impairment loss is recorded in the amount by which the carrying amount of the asset or asset group exceeds its fair value. Non-Marketable Investments Cadence’s non-marketable investments include its investments in privately-held companies. These investments are initially recorded at cost and are included in other assets in the consolidated balance sheets. Cadence accounts for these investments using either the cost method or the equity method of accounting. Cadence reviews the fair value of its non-marketable investments on a regular basis to determine whether the investments in these companies are other-than-temporarily impaired. Cadence considers investee financial performance and other information received from the investee companies, as well as any other available estimates of the fair value of the investee companies in its review. If Cadence determines the carrying value of an investment exceeds its fair value, and that difference is other than temporary, Cadence writes down the value of the investment to its fair value. Cadence records investment write-downs in other income, net, in the consolidated income statements. Nonqualified Deferred Compensation Trust Executive officers, senior management and members of Cadence’s Board of Directors may elect to defer compensation payable to them under Cadence’s Nonqualified Deferred Compensation Plan (“NQDC”). Deferred compensation payments are held in investment accounts and the values of the accounts are adjusted each quarter based on the fair value of the investments held in the NQDC. The selected investments held in the NQDC accounts are classified as trading securities. Trading securities are carried at fair value, with the unrealized gains and losses recognized in the consolidated income statements as other income, net. These trading securities are classified in other assets in the consolidated balance sheets because the securities are not available for Cadence’s use in its operations. Cadence’s obligation with respect to the NQDC trust is recorded in other long-term liabilities on the consolidated balance sheets. Increases and decreases in the NQDC trust liability are recorded as compensation expense in the consolidated income statements. Deferred Revenue Deferred revenue arises when customers are billed for products or services in advance of revenue recognition. Cadence’s deferred revenue consists primarily of unearned revenue on product licenses and the related maintenance for which revenue is recognized over the duration of the license. The fees for time-based licenses are generally billed quarterly in advance and the related revenue is recognized over multiple periods over the ensuing license period. Maintenance on perpetual licenses is generally renewed annually, billed in full in advance, and the corresponding revenue is recognized over the 12 -month maintenance term. Comprehensive Income Cadence reports comprehensive income in the consolidated statements of comprehensive income. Accumulated other comprehensive income (loss) is reported as a component of stockholders’ equity and includes foreign currency translation gains and losses, changes in defined benefit plan liabilities, and unrealized gains and losses on marketable securities

Debt

Debt	12 Months Ended
	Dec. 30, 2017
Debt Disclosure [Abstract]
DEBT	DEBT Cadence’s outstanding debt as of December 30, 2017 and December 31, 2016 was as follows: December 30, 2017 December 31, 2016 (In thousands) Principal Unamortized Discount Carrying Value Principal Unamortized Discount Carrying Value Revolving Credit Facility $ 85,000 $ — $ 85,000 $ 50,000 $ — $ 50,000 2019 Term Loan 300,000 (226 ) 299,774 300,000 (434 ) 299,566 2024 Notes 350,000 (5,405 ) 344,595 350,000 (6,073 ) 343,927 Total outstanding debt $ 735,000 $ (5,631 ) $ 729,369 $ 700,000 $ (6,507 ) $ 693,493 Revolving Credit Facility On January 30, 2017, Cadence entered into a five-year senior unsecured revolving credit facility with a group of lenders led by JPMorgan Chase Bank, N.A., as administrative agent, which replaced Cadence’s existing revolving credit facility. The credit facility provides for borrowings up to $350.0 million , with the right to request increased capacity up to an additional $250.0 million upon the receipt of lender commitments, for total maximum borrowings of $600.0 million . The credit facility expires on January 28, 2022 and has no subsidiary guarantors. Any outstanding loans drawn under the credit facility are due at maturity on January 28, 2022 . Outstanding borrowings may be paid at any time prior to maturity. Interest accrues on borrowings under the credit facility at either LIBOR plus a margin between 1.250% and 1.875% per annum or at the base rate plus a margin between 0.25% and 0.875% per annum. As of December 30, 2017 , the interest rate on Cadence’s credit facility was 2.62% . Interest is payable quarterly. A commitment fee ranging from 0.15% to 0.30% is assessed on the daily average undrawn portion of revolving commitments. The credit facility contains customary negative covenants that, among other things, restrict Cadence’s ability to incur additional indebtedness, grant liens, make certain investments (including acquisitions), dispose of certain assets and make certain payments, including share repurchases and dividends. In addition, the credit facility contains financial covenants that require Cadence to maintain a funded debt to EBITDA ratio not greater than 3.00 to 1, with a step up to 3.50 to 1 for one year following an acquisition by Cadence of at least $250.0 million that results in a pro forma leverage ratio between 2.75 to 1 and 3.25 to 1. As of December 30, 2017 and December 31, 2016 , Cadence was in compliance with all financial covenants associated with the revolving credit facility. 2019 Term Loan In January 2016, Cadence entered into a $300.0 million three -year senior unsecured non-amortizing term loan facility due on January 28, 2019 (the “2019 Term Loan”) with a group of lenders led by JPMorgan Chase Bank, N.A., as administrative agent. On January 30, 2017, Cadence amended the agreement for its 2019 Term Loan. The amendment modified the 2019 Term Loan covenants to make them consistent with the covenants in the revolving credit facility. The other material terms of the 2019 Term Loan remain unchanged. Amounts outstanding under the 2019 Term Loan initially accrue interest at a rate equal to LIBOR plus a margin of 1.125% per annum, which may increase to a rate equal to LIBOR plus a margin of up to 1.875% per annum, depending on Cadence’s leverage ratio. As of December 30, 2017 , the interest rate on Cadence’s 2019 Term Loan was 2.63% . The 2019 Term Loan contains customary negative covenants that, among other things, restrict Cadence’s ability to incur additional indebtedness, grant liens, make certain investments (including acquisitions), dispose of certain assets and make certain payments, including share repurchases and dividends. In addition, the term loan agreement contains certain financial covenants that require Cadence to maintain a funded debt to EBITDA ratio not greater than 3.00 to 1, with a step-up to 3.50 to 1 for one year following an acquisition by Cadence of at least $250.0 million that results in a pro forma leverage ratio between 2.75 to 1 and 3.25 to 1. As of December 30, 2017 and December 31, 2016 , Cadence was in compliance with all financial covenants associated with the 2019 Term Loan. 2024 Notes In October 2014, Cadence issued $350.0 million aggregate principal amount of 4.375% Senior Notes due October 15, 2024 (the “2024 Notes”). Cadence received net proceeds of $342.4 million from the issuance of the 2024 Notes, net of a discount of $1.4 million and issuance costs of $6.2 million . Both the discount and issuance costs are being amortized to interest expense over the term of the 2024 Notes using the effective interest method. Interest is payable in cash semi-annually in April and October. The 2024 Notes are unsecured and rank equal in right of payment to all of Cadence’s existing and future senior indebtedness. Cadence may redeem the 2024 Notes, in whole or in part, at a redemption price equal to the greater of (a) 100% of the principal amount of the notes to be redeemed and (b) the sum of the present values of the remaining scheduled payments of principal and interest, plus any accrued and unpaid interest, as more particularly described in the indenture governing the 2024 Notes. The indenture governing the 2024 Notes includes customary representations, warranties and restrictive covenants, including, but not limited to, restrictions on Cadence’s ability to grant liens on assets, enter into sale and lease-back transactions, or merge, consolidate or sell assets, and also includes customary events of default. As of December 30, 2017 and December 31, 2016 , Cadence was in compliance with all financial covenants associated with the 2024 Notes.

Cash, Cash Equivalents and Inve

Cash, Cash Equivalents and Investments	12 Months Ended
	Dec. 30, 2017
Cash, Cash Equivalents and Investments [Abstract]
CASH, CASH EQUIVALENTS AND INVESTMENTS	CASH, CASH EQUIVALENTS AND INVESTMENTS Cadence’s cash, cash equivalents and short-term investments at fair value as of December 30, 2017 and December 31, 2016 were as follows: As of December 30, 2017 December 31, 2016 (In thousands) Cash and cash equivalents $ 688,087 $ 465,232 Short-term investments 4,455 3,057 Cash, cash equivalents and short-term investments $ 692,542 $ 468,289 Cash and Cash Equivalents The following table summarizes Cadence’s cash and cash equivalents at fair value as of December 30, 2017 and December 31, 2016 : As of December 30, December 31, (In thousands) Cash and interest bearing deposits $ 184,153 $ 227,508 Money market funds 503,934 237,724 Total cash and cash equivalents $ 688,087 $ 465,232 Short-Term Investments The following tables summarize Cadence’s short-term investments as of December 30, 2017 and December 31, 2016 : As of December 30, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Marketable equity securities $ 1,817 $ 2,638 $ — $ 4,455 As of December 31, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Marketable equity securities $ 2,131 $ 926 $ — $ 3,057 Realized gains and losses from the sale of marketable equity securities are recorded in other income, net in the consolidated income statements. Non-Marketable Investments Cadence’s non-marketable investments generally consist of voting preferred stock, convertible debt or other instruments of privately-held entities and are included in other assets on Cadence’s consolidated balance sheets. If Cadence determines that it has the ability to exercise significant influence over the issuer, which may include considering whether the investments are in-substance common stock, the investment is accounted for using the equity method. The equity method income or loss recorded by Cadence is based on its percentage ownership in the issuer. Cadence records realized gains and losses from the sale of non-marketable investments and write-downs related to cost method investments due to other-than-temporary declines in value in the consolidated income statements as other income, net. Cadence’s non-marketable investments as of December 30, 2017 and December 31, 2016 were as follows: As of December 30, December 31, (In thousands) Cost method $ 532 $ 532 Equity method 2,460 2,634 Total non-marketable investments $ 2,992 $ 3,166

Receivables, net

Receivables, net	12 Months Ended
	Dec. 30, 2017
Receivables [Abstract]
RECEIVABLES, NET	RECEIVABLES, NET Cadence’s current and long-term receivables balances as of December 30, 2017 and December 31, 2016 were as follows: As of December 30, December 31, (In thousands) Accounts receivable $ 119,325 $ 85,554 Unbilled accounts receivable 71,101 71,617 Long-term receivables 12,239 12,949 Total receivables 202,665 170,120 Less allowance for doubtful accounts — — Total receivables, net $ 202,665 $ 170,120 Cadence’s customers are primarily concentrated within the semiconductor and electronics systems industries. As of December 30, 2017 , one customer accounted for 17% of Cadence’s total receivables. As of December 31, 2016 , no one customer accounted for 10% or more of Cadence’s total receivables. Allowance for doubtful accounts Cadence’s provisions for losses on its accounts receivable during fiscal 2017 , 2016 and 2015 were as follows: Balance at Beginning of Period Charged to Costs and Expenses Uncollectible Accounts Written Off, Net Balance at End of Period Year ended December 30, 2017 $ — $ 2,623 $ (2,623 ) $ — Year ended December 31, 2016 — 308 (308 ) — Year ended January 2, 2016 $ — $ 126 $ (126 ) $ —

Income Taxes

Income Taxes	12 Months Ended
	Dec. 30, 2017
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The Tax Act was enacted in December 2017 and included several provisions that affected Cadence significantly, such as a one-time, mandatory transition tax on its previously untaxed foreign earnings and a reduction in the federal corporation income tax rate from 35% to 21% as of January 1, 2018, among others. Cadence is required to recognize the effect of tax law changes in the period of enactment, which in the case of the Tax Act was December 2017, even though the effective date for most provisions of the Tax Act is January 1, 2018. The Securities and Exchange Commission issued Staff Accounting Bulletin No. 118, which allows registrants to record reasonable estimates or to apply tax laws in effect prior to the enactment of the Tax Act for a period of up to one year from the date of enactment when it does not have the necessary information available, prepared or analyzed in reasonable detail to complete its accounting for the changes in taxation. This provisional period ends when a company has obtained, prepared and analyzed the information necessary to finalize its accounting, but cannot extend beyond December 22, 2018. Cadence was unable to complete the accounting for the effects of the Tax Act in fiscal 2017 because of the complexity and ambiguity of certain tax and accounting effects of the Tax Act. Cadence made reasonable estimates and recorded provisional amounts for the following effects of the Tax Act: • Transition tax on the deemed repatriation of past earnings of foreign subsidiaries; • Remeasurement of U.S. deferred taxes for the U.S. tax rate reduction; • Deferred taxes on past earnings of foreign subsidiaries that may be repatriated in the future; and • Unrecognized tax benefits related to the transition tax. Cadence was unable to make reasonable estimates for the following tax law changes and applied the tax laws in effect prior to the enactment of the Tax Act: • Deferred taxes related to global intangible low-taxed income; and • Assessment of the valuation allowance applying the comprehensive changes in tax laws under the Tax Act. Cadence expects to refine and complete the accounting for the Tax Act during fiscal 2018 as it obtains, prepares and analyzes additional information. Cadence also expects that additional guidance and interpretation of the tax law changes and accounting for the tax effects of the Tax Act will be available during fiscal 2018. Cadence’s income before provision for income taxes included income from the United States and from foreign subsidiaries for fiscal 2017 , 2016 and 2015 , was as follows: 2017 2016 2015 (In thousands) United States $ 81,619 $ 84,694 $ 47,867 Foreign subsidiaries 233,427 152,459 219,729 Total income before provision for income taxes $ 315,046 $ 237,153 $ 267,596 During fiscal 2017, 2016 and 2015, Cadence’s foreign subsidiaries were generally subject to lower statutory tax rates than the United States statutory federal income tax rate of 35% . Cadence’s provision for income taxes was comprised of the following items for fiscal 2017 , 2016 and 2015 : 2017 2016 2015 (In thousands) Current: Federal $ (2,193 ) $ 4,839 $ (10,265 ) State and local (2,097 ) 50 (713 ) Foreign 35,301 34,047 24,622 Total current 31,011 38,936 13,644 Deferred: Federal 76,494 (5,291 ) (13,165 ) State and local 5,571 6,006 1,751 Foreign (2,131 ) (5,584 ) (1,734 ) Total deferred 79,934 (4,869 ) (13,148 ) Tax expense allocated to shareholders’ equity — — 14,683 Total provision for income taxes $ 110,945 $ 34,067 $ 15,179 The provision for income taxes differs from the amount estimated by applying the United States statutory federal income tax rate of 35% to income before provision for income taxes for fiscal 2017 , 2016 and 2015 as follows: 2017 2016 2015 (In thousands) Provision computed at federal statutory income tax rate $ 110,266 $ 83,003 $ 93,659 State and local income tax, net of federal tax effect 5,867 5,534 3,621 Foreign income tax rate differential (65,296 ) (36,098 ) (56,873 ) Impact of 2017 Tax Act* 96,798 — — Stock-based compensation (24,455 ) (13,132 ) 2,687 Change in deferred tax asset valuation allowance 4,689 1,243 (11,066 ) Tax credits (26,789 ) (39,765 ) (19,243 ) Repatriation of foreign earnings — 25,145 50 Tax effects of intra-entity transfer of assets (8,450 ) (7,661 ) (7,928 ) Domestic production activity deduction (2,474 ) (2,826 ) — Withholding taxes 11,225 9,870 5,119 Tax settlements, foreign 3,086 5,620 — Increase in unrecognized tax benefits not included in tax settlements 4,054 614 3,530 Other 2,424 2,520 1,623 Provision for income taxes $ 110,945 $ 34,067 $ 15,179 Effective tax rate 35 % 14 % 6 % ____________ * The provisional amount related to the remeasurement of U.S. deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future was $25.2 million . The provisional amount related to the one-time transition tax on the mandatory deemed repatriation of foreign earnings was $67.2 million . Cadence adopted the new accounting standard related to stock-based compensation in fiscal 2016, which requires the excess tax benefits or deficiencies to be reflected in the consolidated income statements as a component of the provision for income taxes, whereas these income tax effects were previously recognized in stockholders’ equity in the consolidated balance sheets. Cadence adopted the accounting standard on a prospective basis and prior fiscal periods were not restated. Total excess tax benefits recognized in the provision for income taxes in fiscal 2017 and fiscal 2016 were $32.0 million and $17.2 million , respectively. The components of deferred tax assets and liabilities consisted of the following as of December 30, 2017 and December 31, 2016 : As of December 30, December 31, (In thousands) Deferred tax assets: Tax credit carryforwards $ 164,687 $ 180,999 Reserves and accruals 42,357 62,438 Intangible assets 13,112 23,335 Capitalized research and development expense for income tax purposes 10,621 19,093 Operating loss carryforwards 20,650 23,175 Deferred income 12,178 14,842 Capital loss carryforwards 20,266 20,580 Stock-based compensation costs 15,782 20,087 Depreciation and amortization 7,665 12,202 Investments 3,201 6,442 Prepaid expenses — 26,526 Total deferred tax assets 310,519 409,719 Valuation allowance (95,491 ) (92,920 ) Net deferred tax assets 215,028 316,799 Deferred tax liabilities: Intangible assets (36,683 ) (35,651 ) Undistributed foreign earnings (23,563 ) (24,529 ) Other (2,730 ) (119 ) Total deferred tax liabilities (62,976 ) (60,299 ) Total net deferred tax assets $ 152,052 $ 256,500 Cadence remeasured its fiscal 2017 federal deferred tax assets and liabilities at the applicable tax rate of 21% in accordance with the Tax Act. Cadence regularly reviews its deferred tax assets for recoverability and establishes a valuation allowance if it is more likely than not that some portion of the deferred tax assets will not be realized. Because the Tax Act includes significant changes to tax laws that potentially impact Cadence’s valuation allowance analysis and Cadence could not make a reasonable estimate of the effect of such changes, Cadence reviewed its valuation allowance by applying the tax law in effect prior to the enactment of the Tax Act. During fiscal 2017, Cadence determined that there was sufficient positive evidence to conclude that $215.0 million of deferred tax assets were more likely than not to be realized. The evidence that the Company relied on to make this determination included the following: • The magnitude and duration of Cadence’s historical profitability in the United States; • Cadence’s multi-year history of approximately 90% of the aggregate value of its bookings being of a type that generates revenue recognized over time; • Cadence’s existing revenue backlog as of December 30, 2017 that provides Cadence with an objective source of future revenues to be recognized in fiscal 2018 and subsequent periods; and • Cadence’s expectation of having sufficient sources of income in the future to prevent the expiration of deferred tax assets. Cadence will provide adjustments to the fiscal 2017 valuation allowance during fiscal 2018 upon obtaining, preparing and analyzing the information necessary to update and finalize its accounting for the tax effects of the Tax Act. During fiscal 2017 and 2016, Cadence maintained valuation allowances of $95.5 million and $92.9 million , respectively, on certain federal, state and foreign deferred tax assets because the realization of these deferred tax assets require future income of a specific character or amount that Cadence considered uncertain. The valuation allowance primarily relates to the following: • Tax credits in certain states that are accumulating at a rate greater than Cadence’s capacity to utilize the credits and tax credits in certain states where it is likely the credits will expire unused; • Federal, state and foreign deferred tax assets related to investments and capital losses that can only be utilized against gains that are capital in nature; and • Foreign tax credits that can only be fully utilized if Cadence has sufficient income of a specific character in the future. As of December 30, 2017 , Cadence’s operating loss carryforwards were as follows: Amount Expiration Periods (In thousands) Federal $ 13,638 from 2021 through 2036 California 198,173 from 2019 through 2036 Other states (tax effected, net of federal benefit) 3,081 from 2019 through 2037 Foreign (tax effected) 866 from 2025 through indefinite As of December 30, 2017 , Cadence had tax credit carryforwards of: Amount Expiration Periods (In thousands) Federal* $ 87,746 from 2023 through 2037 California 52,628 indefinite Other states 9,153 from 2018 through 2037 Foreign 15,160 from 2018 through 2037 _____________ *Certain of Cadence’s foreign tax credits have yet to be realized and as a result do not yet have an expiration period. Under the Tax Act, all foreign earnings are subject to U.S. taxation. Accordingly, Cadence does not expect to indefinitely reinvest the earnings from its foreign subsidiaries, although Cadence continues to evaluate the accounting for all of the tax effects of the Tax Act during fiscal 2018. Examinations by Tax Authorities Taxing authorities regularly examine Cadence’s income tax returns. As of December 30, 2017 Cadence’s earliest tax years that remain open to examination and the assessment of additional tax include: Jurisdiction Earliest Tax Year Open to Examination United States - Federal 2014 United States - California 2013 Hungary 2012 Unrecognized Tax Benefits The changes in Cadence’s gross amount of unrecognized tax benefits during fiscal 2017 , 2016 and 2015 are as follows: 2017 2016 2015 (In thousands) Unrecognized tax benefits at the beginning of the fiscal year $ 98,540 $ 87,820 $ 97,224 Gross amount of the increases (decreases) in unrecognized tax benefits of tax positions taken during a prior year* 688 (155 ) (7,331 ) Gross amount of the increases in unrecognized tax benefits as a result of tax positions taken during the current year 13,141 11,342 7,513 Amount of decreases in unrecognized tax benefits relating to settlements with taxing authorities, including the utilization of tax attributes — — (9,571 ) Reductions to unrecognized tax benefits resulting from the lapse of the applicable statute of limitations (3,028 ) (149 ) (119 ) Effect of foreign currency translation 838 (318 ) 104 Unrecognized tax benefits at the end of the fiscal year $ 110,179 $ 98,540 $ 87,820 Total amounts of unrecognized tax benefits that, if upon resolution of the uncertain tax positions would reduce Cadence’s effective tax rate $ 63,108 $ 56,248 $ 48,335 _________ * Includes unrecognized tax benefits of tax positions recorded in connection with acquisitions The total amounts of interest, net of tax, and penalties recognized in the consolidated income statements as provision (benefit) for income taxes for fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 (In thousands) Interest $ 1,865 $ 1,166 $ 110 Penalties 218 3 (127 ) The total amounts of gross accrued interest and penalties recognized in the consolidated balance sheets as of December 30, 2017 and December 31, 2016 were as follows: As of December 30, December 31, (In thousands) Interest $ 2,511 $ 1,332 Penalties 151 265

Acquisitions

Acquisitions	12 Months Ended
	Dec. 30, 2017
Business Combinations [Abstract]
ACQUISITIONS	ACQUISITIONS During fiscal 2017, Cadence completed two business combinations for total cash consideration of $142.8 million , after taking into account cash acquired of $4.2 million . The total purchase consideration was allocated to the assets acquired and liabilities assumed based on their respective estimated fair values on the acquisition dates. Cadence will also make payments to certain employees over a period of up to three years subject to continued employment and other performance-based conditions. Cadence recorded a total of $76.4 million of acquired intangible assets (of which $71.5 million represents in-process technology), $90.2 million of goodwill and $19.6 million of net liabilities consisting primarily of deferred tax liabilities. Acquired intangibles with definite lives are amortized on a straight-line basis over the remaining estimated economic life of the underlying products and technologies. The weighted-average amortization period for definite-lived intangible assets acquired is 5.6 years . In-process technology consists of projects that had not reached technological feasibility by the date of acquisition and are considered indefinite-lived intangible assets until the completion or abandonment of the project. Upon completion of the project, the assets are amortized over their estimated useful lives. The recorded goodwill is related to expected synergies from combining operations of the acquired companies and is not deductible for tax purposes. Results of operations and the estimated fair value of acquired assets and assumed liabilities are recorded in the consolidated financial statements from the date of acquisition. Pro forma results of operations for the business combinations completed during fiscal 2017 have not been presented because the effects of these acquisitions, individually and in the aggregate, would not have been material to Cadence’s financial results. The fair values of acquired intangible assets and assumed liabilities were determined using significant inputs that are not observable in the market. For an additional description of these fair value calculations, see Note 16 in the notes to the consolidated financial statements. During fiscal 2016, Cadence completed two business combinations for total cash consideration of $42.4 million , after taking into account cash acquired of $1.8 million . The total purchase consideration was allocated to the assets acquired and liabilities assumed based on their respective estimated fair values on the acquisition dates. Cadence will also make payments to certain employees over a period of up to four years subject to continued employment and other conditions. Cadence recorded a total of $23.6 million of goodwill, $23.2 million of acquired intangible assets and $2.6 million of net liabilities consisting primarily of deferred revenue. A trust for the benefit of the children of Lip-Bu Tan, Cadence’s Chief Executive Officer (“CEO”) and director, owned less than 3% of nusemi inc, one of the companies acquired in 2017, and less than 2% of Rocketick Technologies Ltd., one of the companies acquired in 2016. Mr. Tan and his wife serve as co-trustees of the trust and disclaim pecuniary and economic interest in the trust. The Board of Directors of Cadence reviewed the transactions and concluded that it was in the best interests of Cadence to proceed with the transactions. Mr. Tan recused himself from the Board of Directors’ discussion of the valuation of nusemi inc and Rocketick Technologies Ltd. and on whether to proceed with the transactions. Acquisition-related Transaction Costs Transaction costs associated with acquisitions were $0.6 million , $1.1 million and $0.7 million during fiscal 2017 , 2016 and 2015 , respectively. These costs consist of professional fees and administrative costs and were expensed as incurred in Cadence’s consolidated income statements.

Goodwill and Acquired Intangibl

Goodwill and Acquired Intangibles	12 Months Ended
	Dec. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND ACQUIRED INTANGIBLES	GOODWILL AND ACQUIRED INTANGIBLES Goodwill The changes in the carrying amount of goodwill during fiscal 2017 and 2016 were as follows: Gross Carrying Amount (In thousands) Balance as of January 2, 2016 $ 551,772 Goodwill resulting from acquisitions 23,579 Effect of foreign currency translation (2,587 ) Balance as of December 31, 2016 572,764 Goodwill resulting from acquisitions 90,218 Effect of foreign currency translation 3,027 Balance as of December 30, 2017 $ 666,009 Cadence completed its annual goodwill impairment test during the third quarter of fiscal 2017 and determined that the fair value of Cadence’s single reporting unit substantially exceeded the carrying amount of its net assets and that no impairment existed. Acquired Intangibles, Net Acquired intangibles as of December 30, 2017 were as follows, excluding intangibles that were fully amortized as of December 31, 2016 : Gross Carrying Amount Accumulated Amortization Acquired Intangibles, Net (In thousands) Existing technology $ 342,810 $ (199,529 ) $ 143,281 Agreements and relationships 151,063 (90,675 ) 60,388 Tradenames, trademarks and patents 10,918 (7,252 ) 3,666 Total acquired intangibles with definite lives 504,791 (297,456 ) 207,335 In-process technology 71,500 — 71,500 Total acquired intangibles $ 576,291 $ (297,456 ) $ 278,835 Acquired intangibles as of December 31, 2016 were as follows, excluding intangibles that were fully amortized as of January 2, 2016 : Gross Carrying Amount Accumulated Amortization Acquired Intangibles, Net (In thousands) Existing technology $ 342,108 $ (160,178 ) $ 181,930 Agreements and relationships 174,623 (100,778 ) 73,845 Tradenames, trademarks and patents 9,806 (6,767 ) 3,039 Total acquired intangibles $ 526,537 $ (267,723 ) $ 258,814 Amortization expense from existing technology and maintenance agreements is included in cost of product and maintenance. Amortization expense for fiscal 2017 , 2016 and 2015 , by consolidated income statement caption, was as follows: 2017 2016 2015 (In thousands) Cost of product and maintenance $ 41,781 $ 42,387 $ 40,532 Amortization of acquired intangibles 14,716 18,095 23,716 Total amortization of acquired intangibles $ 56,497 $ 60,482 $ 64,248 Estimated amortization expense for intangible assets with definite lives for the following five fiscal years and thereafter was as follows: (In thousands) 2018 $ 53,346 2019 46,239 2020 40,621 2021 36,115 2022 17,810 Thereafter 13,204 Total estimated amortization expense $ 207,335

Stock Repurchase Programs

Stock Repurchase Programs	12 Months Ended
	Dec. 30, 2017
Equity [Abstract]
STOCK REPURCHASE PROGRAMS	STOCK REPURCHASE PROGRAMS In January 2017, Cadence’s Board of Directors authorized the repurchase of shares of Cadence common stock with a value of up to $525.0 million in the aggregate. The actual timing and amount of repurchases are subject to business and market conditions, corporate and regulatory requirements, acquisition opportunities and other factors. As of December 30, 2017 , approximately $425 million remained available to repurchase shares of Cadence common stock under the current authorization. The shares repurchased under Cadence’s repurchase authorizations and the total cost of repurchased shares, including commissions, during fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 (In thousands) Shares repurchased 2,495 40,493 16,255 Total cost of repurchased shares $ 100,025 $ 960,289 $ 333,189

Stock Compensation Plans and St

Stock Compensation Plans and Stock Based Compensation	12 Months Ended
	Dec. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK COMPENSATION PLANS AND STOCK-BASED COMPENSATION	STOCK COMPENSATION PLANS AND STOCK-BASED COMPENSATION Equity Incentive Plans Cadence’s Omnibus Plan provides for the issuance of both incentive and non-qualified options, restricted stock awards, restricted stock units, stock bonuses and the rights to acquire restricted stock to both executive and non-executive employees. During fiscal 2017, Cadence’s shareholders approved an amendment to the Omnibus Plan to increase the number of shares of common stock authorized for issuance by 6.5 million . As of December 30, 2017 , the total number of shares available for future issuance under the Omnibus Plan was 11.2 million . Options granted under the Omnibus Plan have an exercise price not less than the fair market value of the stock on the date of grant. Options and restricted stock generally vest over a three - to four -year period. Options granted under the Omnibus Plan expire seven years from the date of grant. Vesting of restricted stock awards granted under the Omnibus Plan may require the attainment of specified performance criteria. Cadence’s 1995 Directors Stock Incentive Plan (the “Directors Plan”) provides for the issuance of non-qualified options, restricted stock awards and restricted stock units to its non-employee directors. Options granted under the Directors Plan have an exercise price not less than the fair market value of the stock on the date of grant. As of December 30, 2017, the total number of shares available for future issuance under the Directors Plan was 0.6 million . Options granted under the Directors Plan expire after ten years, and options, restricted stock awards and restricted stock units vest one year from the date of grant. Cadence has assumed certain options granted to employees of acquired companies (“Acquired Options”). The Acquired Options were assumed by Cadence outside of its stock option plans, and each option is administered under the terms of the respective original plans of the acquired companies. All of the Acquired Options have been adjusted for the price conversion under the terms of the acquisition agreement between Cadence and the relevant acquired company. If the Acquired Options are canceled, forfeited or expire, they do not become available for future grant. No additional options will be granted under any of the acquired companies’ plans. Stock-based Compensation Stock-based compensation expense and the related income tax benefit recognized in connection with stock options, restricted stock and the ESPP during fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 (In thousands) Stock options $ 5,417 $ 5,649 $ 7,903 Restricted stock 117,797 96,989 78,615 ESPP 6,809 6,579 5,823 Total stock-based compensation expense $ 130,023 $ 109,217 $ 92,341 Income tax benefit $ 36,664 $ 30,980 $ 24,294 Stock-based compensation expense is reflected in Cadence’s consolidated income statements during fiscal 2017 , 2016 and 2015 as follows: 2017 2016 2015 (In thousands) Cost of product and maintenance $ 2,218 $ 1,995 $ 2,436 Cost of services 3,232 2,911 3,561 Marketing and sales 26,838 22,700 21,654 Research and development 77,222 64,061 49,755 General and administrative 20,513 17,550 14,935 Total stock-based compensation expense $ 130,023 $ 109,217 $ 92,341 Stock Options The exercise price of each stock option granted under Cadence’s employee equity incentive plans is equal to or greater than the closing price of Cadence’s common stock on the date of grant. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model. The weighted-average grant date fair value of options granted and the weighted-average assumptions used in the model for fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 Dividend yield None None None Expected volatility 21.2 % 31.5 % 26.8 % Risk-free interest rate 2.01 % 1.21 % 1.61 % Expected term (in years) 4.8 4.8 5.0 Weighted-average fair value of options granted $ 6.86 $ 5.84 $ 4.60 A summary of the changes in stock options outstanding under Cadence’s equity incentive plans during fiscal 2017 is presented below: Weighted- Average Weighted- Average Remaining Contractual Terms Aggregate Intrinsic Shares Exercise Price (Years) Value (In thousands) (In thousands) Options outstanding as of December 31, 2016 7,117 $ 13.61 Granted 820 30.72 Exercised (1,957 ) 11.37 Canceled and forfeited (197 ) 20.52 Options outstanding as of December 30, 2017 5,783 $ 16.56 3.8 $ 110,114 Options vested as of December 30, 2017 4,104 $ 13.72 3.2 $ 89,790 Cadence had total unrecognized compensation expense related to stock option grants of $ 9.5 million as of December 30, 2017 , which will be recognized over the remaining vesting period. The remaining weighted-average vesting period of unvested awards is 2.3 years . The total intrinsic value of and cash received from options exercised during fiscal 2017 , 2016 and 2015 was: 2017 2016 2015 (In thousands) Intrinsic value of options exercised $ 45,643 $ 44,835 $ 67,363 Cash received from options exercised 22,255 30,984 52,261 Restricted Stock Generally, restricted stock, which includes restricted stock awards and restricted stock units, vests over three to four years and is subject to the employee’s continuing service to Cadence. Stock-based compensation expense is recognized ratably over the vesting term. The vesting of certain restricted stock grants is subject to attainment of specified performance criteria. Each fiscal quarter, Cadence estimates the probability of the achievement of these performance goals and recognizes any related stock-based compensation expense using the graded-vesting method. The amount of stock-based compensation expense recognized in any one period can vary based on the attainment or expected attainment of the various performance goals. If such performance goals are not ultimately met, no compensation expense is recognized and any previously recognized compensation expense is reversed. Certain long-term, performance-based stock awards granted to executives, vest over three to five years and are subject to certain market conditions and the executives’ continuing service to Cadence. Stock-based compensation expense is recognized straight-line over the vesting term. If the market conditions are not ultimately met, compensation expense previously recognized is not reversed. As of December 30, 2017 , Cadence had granted a total of 1.53 million shares of long-term, performance-based stock awards to executives. Stock-based compensation expense related to performance-based restricted stock grants for fiscal 2017 , 2016 and 2015 was as follows: 2017 2016 2015 (In thousands) Stock-based compensation expense related to performance-based grants $ 8,224 $ 9,195 $ 5,544 A summary of the changes in restricted stock outstanding under Cadence’s equity incentive plans during fiscal 2017 , is presented below: Weighted- Average Grant Date Weighted- Average Remaining Vesting Terms Aggregate Intrinsic Shares Fair Value (Years) Value (In thousands) (In thousands) Unvested shares as of December 31, 2016 12,082 $ 20.40 Granted 5,909 34.48 Vested (5,121 ) 20.75 Forfeited (902 ) 21.49 Unvested shares as of December 30, 2017 11,968 $ 27.11 1.1 $ 500,231 Cadence had total unrecognized compensation expense related to restricted stock grants of $264.4 million as of December 30, 2017 , which will be recognized over the remaining vesting period. The remaining weighted-average vesting period of unvested awards is 2.1 years. The total fair value realized by employees upon vesting of restricted stock during fiscal 2017 , 2016 and 2015 was: 2017 2016 2015 (In thousands) Fair value of restricted stock realized upon vesting $ 174,548 $ 113,114 $ 99,564 Employee Stock Purchase Plan Cadence provides an ESPP, as amended from time to time. A majority of Cadence employees are eligible to participate in the ESPP. Under the terms of the ESPP, eligible employees may purchase Cadence’s common stock at a price equal to 85% of the lower of the fair market value at the beginning or the end of the applicable offering period, in an amount not to exceed 7% of their annual base earnings plus bonuses and commissions, and subject to a limit in any calendar year of $9,411.76 worth of common stock. Each offering period has a six -month duration beginning on either February 1 or August 1. The purchase dates fall on the last days of the six-month offering periods. As of December 30, 2017, the total number of shares available for future issuance under the ESPP was 3.9 million . Compensation expense is calculated using the fair value of the employees’ purchase rights under the Black-Scholes option pricing model. The weighted-average grant date fair value of purchase rights granted under the ESPP and the weighted-average assumptions used in the model for fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 Dividend yield None None None Expected volatility 20.4 % 24.4 % 22.9 % Risk-free interest rate 0.92 % 0.43 % 0.13 % Expected term (in years) 0.5 0.5 0.5 Weighted-average fair value of options granted $ 6.64 $ 4.85 $ 4.23 Shares of common stock issued under the ESPP for fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 (In thousands, except per share amounts) Cadence shares purchased under the ESPP 1,270 1,471 1,519 Cash received for the purchase of shares under the ESPP $ 26,709 $ 24,450 $ 22,449 Weighted-average purchase price per share $ 21.04 $ 16.62 $ 14.78 Reserved for Future Issuance As of December 30, 2017 , Cadence had reserved the following shares of authorized but unissued common stock for future issuance: Shares (In thousands) Employee equity incentive plans* 18,663 Employee stock purchase plans 3,920 Directors stock plans* 1,298 Total 23,881 _____________ * Includes shares reserved for: (i) issuance upon exercise of future option grants, (ii) issuance upon vesting of future restricted stock grants, (iii) outstanding but unexercised options to purchase common stock, or (iv) unvested restricted stock units.

Restructuring and Other Charges

Restructuring and Other Charges	12 Months Ended
	Dec. 30, 2017
Restructuring and Related Activities [Abstract]
RESTRUCTURING AND OTHER CHARGES	RESTRUCTURING AND OTHER CHARGES Cadence has initiated several restructuring plans in an effort to better align its resources with its business strategy. These restructuring plans have primarily been comprised of severance payments and termination benefits related to headcount reductions, estimated lease losses related to facilities vacated under the restructuring plans and charges related to assets abandoned as part of the restructuring plans. During the fourth quarter of fiscal 2017, Cadence initiated a restructuring plan (the “2017 Restructuring Plan”) and recorded restructuring and other charges of $11.9 million related to severance payments and termination benefits. As of December 30, 2017 , total liabilities related to the 2017 Restructuring Plan were $11.1 million . Cadence expects to make cash payments for severance and related benefits for the 2017 Restructuring Plan through the third quarter of fiscal 2018. Cadence initiated two restructuring plans during fiscal 2016 (the “2016 Restructuring Plans”) and recorded restructuring and other charges of $40.4 million related to severance payments and termination benefits, including costs associated with a voluntary early retirement program offered to certain employees. During fiscal 2017 , Cadence revised certain estimates made in connection with the 2016 Restructuring Plans and recorded credits of $2.8 million . As of December 30, 2017 , total liabilities related to the 2016 Restructuring Plans were $2.5 million . Cadence expects to make cash payments for severance and related benefits for the 2016 Restructuring Plans through the first quarter of fiscal 2019. Cadence also initiated a restructuring plan during fiscal 2015 and recorded restructuring and other charges of $4.2 million related to severance payments and termination benefits. As of December 30, 2017 , total liabilities related to restructuring plans initiated prior to fiscal 2016 were $0.2 million . The following table presents activity for Cadence’s restructuring plans during fiscal 2017 , 2016 and 2015 : Severance and Benefits Excess Facilities Other Total (In thousands) Balance, January 3, 2015 $ 4,462 $ 1,267 $ 481 $ 6,210 Restructuring and other charges (credits), net 3,636 1,095 (220 ) 4,511 Non-cash charges — (116 ) — (116 ) Cash payments (7,322 ) (1,798 ) (261 ) (9,381 ) Effect of foreign currency translation (25 ) (62 ) — (87 ) Balance, January 2, 2016 $ 751 $ 386 $ — $ 1,137 Restructuring and other charges, net 40,411 544 — 40,955 Non-cash charges — (159 ) — (159 ) Cash payments (16,890 ) (679 ) — (17,569 ) Effect of foreign currency translation 130 (34 ) — 96 Balance, December 31, 2016 $ 24,402 $ 58 $ — $ 24,460 Restructuring and other charges, net 9,027 379 — 9,406 Cash payments (20,170 ) (186 ) — (20,356 ) Effect of foreign currency translation 276 (2 ) — 274 Balance, December 30, 2017 $ 13,535 $ 249 $ — $ 13,784 The remaining liability for Cadence’s restructuring plans is recorded in the consolidated balance sheet as follows: As of December 30, 2017 (In thousands) Accounts payable and accrued liabilities $ 13,619 Other long-term liabilities 165 Total liabilities $ 13,784

Other Income, Net

Other Income, Net	12 Months Ended
	Dec. 30, 2017
Other Income and Expenses [Abstract]
OTHER INCOME, NET	OTHER INCOME, NET Cadence’s other income, net, for fiscal 2017 , 2016 and 2015 was as follows: 2017 2016 2015 (In thousands) Interest income $ 3,879 $ 2,917 $ 2,667 Gains on sale of marketable debt and equity securities, net 520 317 21 Gains on non-marketable investments 8,934 2,668 2,348 Gains (losses) on securities in NQDC trust 6,145 1,741 (369 ) Gains (losses) on foreign exchange (2,920 ) 6,879 5,606 Gain on sale of property, plant and equipment — 923 — Other income, net 197 477 204 Total other income, net $ 16,755 $ 15,922 $ 10,477

Net Income per Share

Net Income per Share	12 Months Ended
	Dec. 30, 2017
Earnings Per Share [Abstract]
NET INCOME PER SHARE	NET INCOME PER SHARE Basic net income per share is computed by dividing net income during the period by the weighted-average number of shares of common stock outstanding during that period, less unvested restricted stock awards. Diluted net income per share is impacted by equity instruments considered to be potential common shares, if dilutive, computed using the treasury stock method of accounting. The calculations for basic and diluted net income per share for fiscal 2017 , 2016 and 2015 are as follows: 2017 2016 2015 (In thousands, except per share amounts) Net income $ 204,101 $ 203,086 $ 252,417 Weighted-average common shares used to calculate basic net income per share 272,097 284,502 288,018 2015 Warrants — — 16,434 Stock-based awards 8,124 6,754 7,850 Weighted-average common shares used to calculate diluted net income per share 280,221 291,256 312,302 Net income per share - basic $ 0.75 $ 0.71 $ 0.88 Net income per share - diluted $ 0.73 $ 0.70 $ 0.81 The following table presents shares of Cadence’s common stock outstanding for fiscal 2017 , 2016 and 2015 that were excluded from the computation of diluted net income per share because the effect of including these shares in the computation of diluted net income per share would have been anti-dilutive: 2017 2016 2015 (In thousands) Long-term performance-based awards 152 1,069 — Options to purchase shares of common stock 303 581 1,029 Non-vested shares of restricted stock 77 27 60 Total potential common shares excluded 532 1,677 1,089

Balance Sheet Components

Balance Sheet Components	12 Months Ended
	Dec. 30, 2017
Balance Sheet Components [Abstract]
BALANCE SHEET COMPONENTS	BALANCE SHEET COMPONENTS A summary of certain balance sheet components as of December 30, 2017 and December 31, 2016 is as follows: As of December 30, December 31, (In thousands) Inventories: Raw materials $ 17,491 $ 26,589 Finished goods 15,718 12,886 Inventories $ 33,209 $ 39,475 Property, plant and equipment: Computer equipment and related software $ 537,144 $ 503,543 Buildings 127,478 126,023 Land 55,840 55,785 Leasehold, building and land improvements 106,173 95,040 Furniture and fixtures 27,590 23,580 Equipment 50,340 44,119 In-process capital assets 5,154 3,478 Total cost 909,719 851,568 Less: Accumulated depreciation and amortization (658,377 ) (612,961 ) Property, plant and equipment, net $ 251,342 $ 238,607 Other assets: Deferred income taxes $ 152,501 $ 256,547 Other long-term assets 77,800 55,193 Other assets $ 230,301 $ 311,740 Accounts payable and accrued liabilities: Payroll and payroll-related accruals $ 164,310 $ 174,936 Accounts payable 4,825 4,367 Income taxes payable - current 3,936 18,382 Accrued operating liabilities 48,030 41,811 Accounts payable and accrued liabilities $ 221,101 $ 239,496

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Lease Commitments Facilities, equipment and vehicles are leased under various operating leases expiring at various dates through 2031. Certain of these leases contain renewal options and escalating rent payments. Rental expense is recognized on a straight-line basis and was as follows during fiscal 2017 , 2016 and 2015 : 2017 2016 2015 (In thousands) Rent expense $ 32,089 $ 28,216 $ 27,406 As of December 30, 2017 , future minimum lease payments under non-cancelable operating leases were as follows: Operating Leases For the fiscal years: (In thousands) 2018 $ 28,090 2019 20,641 2020 12,514 2021 10,013 2022 7,042 Thereafter 21,721 Total lease payments $ 100,021 Purchase Obligations Cadence had purchase obligations of $31.8 million as of December 30, 2017 that were associated with agreements or commitments for purchases of goods or services. Legal Proceedings From time to time, Cadence is involved in various disputes and litigation that arise in the ordinary course of business. These include disputes and lawsuits related to intellectual property, indemnification obligations, mergers and acquisitions, licensing, contracts, distribution arrangements and employee relations matters. At least quarterly, Cadence reviews the status of each significant matter and assesses its potential financial exposure. If the potential loss from any claim or legal proceeding is considered probable and the amount or the range of loss can be estimated, Cadence accrues a liability for the estimated loss. Legal proceedings are subject to uncertainties, and the outcomes are difficult to predict. Because of such uncertainties, accruals are based on Cadence’s judgments using the best information available at the time. As additional information becomes available, Cadence reassesses the potential liability related to pending claims and litigation matters and may revise estimates. Other Contingencies Cadence provides its customers with a warranty on sales of hardware products, generally for a 90 -day period. Cadence did not incur any significant costs related to warranty obligations during fiscal 2017 , 2016 or 2015 . Cadence’s product license and services agreements typically include a limited indemnification provision for claims from third parties relating to Cadence’s intellectual property. If the potential loss from any indemnification claim is considered probable and the amount or the range of loss can be estimated, Cadence accrues a liability for the estimated loss. The indemnification is generally limited to the amount paid by the customer. Cadence did not incur any significant losses from indemnification claims during fiscal 2017 , 2016 or 2015 .

Fair Value

Fair Value	12 Months Ended
	Dec. 30, 2017
Fair Value Disclosures [Abstract]
FAIR VALUE	FAIR VALUE Inputs to valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect Cadence’s market assumptions. These two types of inputs have created the following fair value hierarchy: • Level 1 – Quoted prices for identical instruments in active markets; • Level 2 – Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets; and • Level 3 – Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. This hierarchy requires Cadence to minimize the use of unobservable inputs and to use observable market data, if available, when determining fair value. Cadence recognizes transfers between levels of the hierarchy based on the fair values of the respective financial instruments at the end of the reporting period in which the transfer occurred. There were no transfers between levels of the fair value hierarchy during fiscal 2017. On a quarterly basis, Cadence measures at fair value certain financial assets and liabilities. The fair value of financial assets and liabilities was determined using the following levels of inputs as of December 30, 2017 and December 31, 2016 : Fair Value Measurements as of December 30, 2017: Total Level 1 Level 2 Level 3 (In thousands) Assets Cash equivalents: Money market funds $ 503,934 $ 503,934 $ — $ — Short-term investments: Marketable equity securities 4,455 4,455 — — Trading securities held in NQDC trust 31,473 31,473 — — Foreign currency exchange contracts 2,937 — 2,937 — Total Assets $ 542,799 $ 539,862 $ 2,937 $ — As of December 30, 2017, Cadence did not have any financial liabilities requiring a recurring fair value measurement. Fair Value Measurements as of December 31, 2016: Total Level 1 Level 2 Level 3 (In thousands) Assets Cash equivalents: Money market funds $ 237,724 $ 237,724 $ — $ — Short-term investments: Marketable equity securities 3,057 3,057 — — Trading securities held in NQDC trust 26,622 26,622 — — Total Assets $ 267,403 $ 267,403 $ — $ — Total Level 1 Level 2 Level 3 (In thousands) Liabilities Foreign currency exchange contracts $ 2,653 $ — $ 2,653 $ — Level 3 Measurements During fiscal 2017, Cadence acquired intangible assets of $76.4 million . The fair value of certain of the intangible assets acquired was determined using the income approach and level 3 inputs. Key assumptions include market conditions, the amount and timing of expected future cash flows, projected costs, assumed profit margins, discount rates and the economy in general. The fair value of these intangible assets was affected most significantly by the projected income associated with the intangible assets and the anticipated timing of the projected income, but was also impacted by the discount rate used to adjust the outcomes to their present values. Cadence used a discount rate of 14% to value the intangible assets acquired. Cadence believes that its estimates and assumptions related to the fair value of its acquired intangible assets are reasonable, but significant judgment is involved.

Employee and Director Benefit P

Employee and Director Benefit Plans	12 Months Ended
	Dec. 30, 2017
Retirement Benefits [Abstract]
EMPLOYEE AND DIRECTOR BENEFIT PLANS	EMPLOYEE AND DIRECTOR BENEFIT PLANS Cadence maintains various defined contribution plans for its eligible U.S. and non-U.S. employees. For employees in the United States, Cadence maintains a 401(k) savings plan to provide retirement benefits through tax-deferred salary deductions and may make discretionary contributions, as determined by the Board of Directors, which cannot exceed a specified percentage of the annual aggregate salaries of those employees eligible to participate. Cadence’s total contributions made to these plans during fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 (In thousands) Contributions to defined contribution plans $ 26,010 $ 24,185 $ 22,337 Executive Officers and Directors may also elect to defer compensation payable to them under Cadence’s NQDC. Deferred compensation payments are held in investment accounts and the values of the accounts are adjusted each quarter based on the fair value of the investments held in the NQDC. These investments are classified as trading securities in the consolidated balance sheets and gains and losses are recognized as other income, net in the consolidated income statements. Net recognized gains (loss) of trading securities during fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 (In thousands) Trading securities $ 6,145 $ 1,741 $ (369 ) Certain of Cadence’s international subsidiaries sponsor defined benefit retirement plans. The unfunded projected benefit obligation for Cadence’s defined benefit retirement plans is recorded in other long-term liabilities in the consolidated balance sheets. The unfunded projected benefit obligation for these retirement plans as of December 30, 2017 , December 31, 2016 and January 2, 2016 was as follows: December 30, December 31, January 2, (In thousands) Unfunded projected benefit obligation - defined benefit retirement plans $ 6,976 $ 6,164 $ 6,131 Cadence recorded total expense related to these defined benefit retirement plans during fiscal 2017 , 2016 and 2015 as follows: 2017 2016 2015 (In thousands) Expense related to defined benefit retirement plans $ 1,214 $ 670 $ 1,359

Other Comprehensive Loss

Other Comprehensive Loss	12 Months Ended
	Dec. 30, 2017
Other Comprehensive Income (Loss), Net of Tax [Abstract]
ACCUMULATED OTHER COMPREHENSIVE LOSS	ACCUMULATED OTHER COMPREHENSIVE LOSS Cadence’s accumulated other comprehensive loss is comprised of the aggregate impact of foreign currency translation gains and losses, changes in defined benefit plan liabilities, and changes in unrealized holding gains and losses on available-for-sale securities net of reclassifications for realized gains and losses, as presented in Cadence’s consolidated statements of comprehensive income. Accumulated other comprehensive loss was comprised of the following as of December 30, 2017 , and December 31, 2016 : As of December 30, December 31, (In thousands) Foreign currency translation loss $ (2,976 ) $ (22,370 ) Changes in defined benefit plan liabilities (3,292 ) (3,716 ) Unrealized holding gains on available-for-sale securities 2,638 926 Total accumulated other comprehensive loss $ (3,630 ) $ (25,160 ) For fiscal 2017 , 2016 and 2015 , there were no significant amounts related to foreign currency translation loss or changes in defined benefit plan liabilities reclassified to net income from accumulated other comprehensive loss. Changes in unrealized holding gains on available-for-sale securities includes the following for fiscal 2017 , 2016 and 2015 : 2017 2016 2015 (In thousands) Unrealized holding gains $ 2,231 $ 770 $ 202 Reclassification of unrealized holding gains to other income, net (519 ) (54 ) (33 ) Changes in unrealized holding gains $ 1,712 $ 716 $ 169

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 30, 2017
Segment Reporting [Abstract]
SEGMENT REPORTING	SEGMENT REPORTING Segment reporting is based on the “management approach,” following the method that management organizes the company’s reportable segments for which separate financial information is made available to, and evaluated regularly by, the chief operating decision maker in allocating resources and in assessing performance. Cadence’s chief operating decision maker is its CEO, who reviews Cadence’s consolidated results as one operating segment. In making operating decisions, the CEO primarily considers consolidated financial information, accompanied by disaggregated information about revenues by geographic region. Outside the United States, Cadence markets and supports its products and services primarily through its subsidiaries. Revenue is attributed to geography based upon the country in which the product is used or services are delivered. Long-lived assets are attributed to geography based on the country where the assets are located. The following table presents a summary of revenue by geography for fiscal 2017 , 2016 and 2015 : 2017 2016 2015 (In thousands) Americas: United States $ 829,436 $ 832,583 $ 782,419 Other Americas 35,067 31,296 25,960 Total Americas 864,503 863,879 808,379 Asia 526,201 445,500 413,588 Europe, Middle East and Africa 385,705 346,701 316,684 Japan 166,623 160,003 163,440 Total $ 1,943,032 $ 1,816,083 $ 1,702,091 The following table presents a summary of long-lived assets by geography as of December 30, 2017 , December 31, 2016 and January 2, 2016 : As of December 30, December 31, January 2, (In thousands) Americas: United States $ 198,744 $ 193,750 $ 189,665 Other Americas 611 757 387 Total Americas 199,355 194,507 190,052 Asia 37,678 30,564 24,767 Europe, Middle East and Africa 13,615 12,692 12,832 Japan 694 844 948 Total $ 251,342 $ 238,607 $ 228,599

Summary of Significant Accoun27

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 30, 2017
Accounting Policies [Abstract]
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation The consolidated financial statements include the accounts of Cadence and its subsidiaries after elimination of intercompany accounts and transactions. All consolidated subsidiaries are wholly owned by Cadence. Certain prior period balances have been reclassified to conform to the current period presentation. Cadence’s fiscal years are 52- or 53-week periods ending on the Saturday closest to December 31. Fiscal 2017, 2016 and 2015 were each 52-week fiscal years.
Use of Estimates	Use of Estimates Preparation of the consolidated financial statements in conformity with United States generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.
New Accounting Standards Not Yet Adopted	New Accounting Standards Not Yet Adopted Revenue Recognition In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers (Topic 606),” which supersedes the revenue recognition requirements in “Revenue Recognition (Topic 605).” Under Topic 606, revenue is recognized when a customer obtains control of promised goods or services and is recognized in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services. In addition, Topic 606 requires enhanced disclosures, including disclosure of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The FASB has recently issued several amendments to the standard, including clarification on accounting for licenses of intellectual property and identifying performance obligations. Topic 606 permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or modified retrospectively with the cumulative effect of applying the guidance as of the date of initial application (the cumulative catch-up transition method). Cadence will adopt the standard using the cumulative catch-up transition method. Topic 606 is effective for Cadence beginning with the first quarter of fiscal 2018. The most significant impacts of the adoption of Topic 606 are as follows: • Cadence’s revenue mix is expected to remain approximately 90% recognizable over time under Topic 606, as it was under Topic 605; • The use of the cumulative catch-up method upon adoption of Topic 606 requires Cadence to evaluate only contracts that were in effect at the beginning of fiscal 2018 as if those contracts had been accounted for under Topic 606 from the beginning of their terms; • Cadence expects that approximately 3% of its existing backlog at the beginning of fiscal 2018 will be adjusted through retained earnings upon adoption of Topic 606 and such backlog will not be recognized as revenue in future periods under Topic 606. Because this revenue would have been recognized in prior periods had Topic 606 then been in effect, Cadence will also have related changes to its accounts receivable and deferred revenue balances; • Because of the transition method, revenue generated under Topic 606 is expected to be slightly lower than revenue would have been under Topic 605 in 2018; and • In 2018, the year of adoption, Cadence will report revenue under Topic 606 with supplemental disclosures of what revenue would have been under Topic 605. Cadence will continue to recognize revenue over time for its time-based software arrangements, which represents a large majority of its total revenue, because the multiple software licenses and related updates in its time-based arrangements constitute a single, combined performance obligation. The timing of revenue recognition for its hardware and professional services is expected to remain substantially unchanged. The adoption of Topic 606 will impact Cadence’s accounting for multiple element arrangements (“MEAs”) that combine many software-related deliverables, which may include multiple software contracts with varying terms, IP licenses, and/or service elements. Topic 605 requires vendor specific objective evidence (“VSOE”) to recognize revenue separately for the different undelivered elements. Cadence has not established VSOE under Topic 605, thus the revenue related to these agreements is generally recognized over time beginning with the delivery of the last specified deliverable and ending on the latest end date. Topic 606 requires Cadence to separate the different elements through the use of stand-alone selling prices (“SSPs”), and to recognize the revenue allocated to the different elements as if those elements had been sold on a standalone basis, either up front or over time. Certain IP license agreements will be recognized up front under Topic 606, as opposed to over time under Topic 605. In addition, certain software agreements will be recognized over time under Topic 606, as opposed to up front under Topic 605. Despite these changes, Cadence expects its revenue mix will be similar, such that approximately 90% of its revenue is recognized over time. More judgments and estimates are required under Topic 606 than are required under Topic 605, including estimating the SSP for each performance obligation identified within Cadence’s contracts. Due to the complexity of certain contracts, the actual revenue recognition treatment required under the new standard for these arrangements may be dependent on contract-specific terms and vary in some instances. Under the cumulative catch-up transition method, Cadence has evaluated its contracts that were in effect on the adoption date as if they had been accounted for under Topic 606 from contract inception. Some revenue related to the MEAs and IP arrangements noted above that would have been recognized in future periods under Topic 605 will be recast under Topic 606 as if the revenue had been recognized in prior periods. As this transition method requires that Cadence not adjust historical reported revenue amounts, the revenue that would have been recognized under this method prior to the adoption date will be an adjustment to retained earnings and will not be recognized as revenue in future periods as previously planned. Because of this transition method, approximately 3% of Cadence’s year-end backlog will be adjusted to retained earnings upon adoption. Topic 606 also requires the deferral of incremental costs of obtaining a contract with a customer. This requires that Cadence capitalize commission costs that are directly related to obtaining customer contracts and amortize them over the life of the contract. Cadence anticipates the amount of the amortization of capitalized commissions under Topic 606 will be similar to the amount of commissions expense for fiscal 2018 bookings under Topic 605 and will not have a significant impact on its consolidated income statements.
Cash, Cash Equivalents and Short-Term Investments	Cash, Cash Equivalents and Short-Term Investments Cadence considers all highly liquid investments with original maturities of three months or less on the date of purchase to be cash equivalents. Book overdraft balances are recorded in accounts payable and accrued liabilities in the consolidated balance sheets and are reported as a component of cash flows from financing activities in the consolidated statement of cash flows. Cadence’s short-term investments consist of marketable equity securities that are classified as available for sale. Available-for-sale equity securities are carried at fair value, with the unrealized gains and losses presented net of tax as a separate component of other comprehensive income. Unrealized and realized gains and losses are determined using the specific identification method. Cadence recognizes gains on its available-for-sale securities when they are realized. Cadence recognizes losses on its available-for-sale securities when they are realized or when Cadence has determined that an other-than-temporary decline in fair value has occurred. Cadence records realized gains, realized losses and other-than-temporary impairments as part of other income, net in the consolidated income statements.
Foreign Operations	Foreign Operations Cadence transacts business in various foreign currencies. The United States dollar is the functional currency of Cadence’s consolidated entities operating in the United States and certain of its consolidated subsidiaries operating outside the United States. The functional currency for Cadence’s other consolidated entities operating outside of the United States is generally the country’s local currency. Cadence translates the financial statements of consolidated entities whose functional currency is not the United States dollar into United States dollars. Cadence translates assets and liabilities at the exchange rate in effect as of the financial statement date and translates income statement accounts using an average exchange rate for the period. Cadence includes adjustments from translating assets and liabilities into United States dollars, and the effect of exchange rate changes on intercompany transactions of a long-term investment nature in stockholders’ equity as a component of accumulated other comprehensive income. Cadence reports gains and losses from foreign exchange rate changes related to intercompany receivables and payables that are not of a long-term investment nature, as well as gains and losses from foreign currency transactions of a monetary nature in other income, net, in the consolidated income statements.
Revenue Recognition	Revenue Recognition Software and IP Revenue Recognition Cadence primarily uses time-based licenses to license its software. Certain software and IP products are licensed using a perpetual license. Time-based licenses - Cadence’s time-based license arrangements offer customers the right to access and use all of the products delivered at the outset of an arrangement and updates throughout the entire term of the arrangement, which is generally two to three years, with no rights to return. Cadence’s updates provide for continued access to evolving technology as customers’ designs migrate to more advances nodes. In addition, certain time-based license arrangements include: • Remix among the products delivered at the outset of the arrangement, so long as the cumulative contractual value of all products in use does not exceed the total license fee determined at the outset of the arrangement; and • Use of unspecified additional products that become commercially available during the term of the arrangement. In general, product and maintenance revenue associated with time-based licenses is recognized over the term of the license, commencing upon the later of the effective date of the arrangement or delivery of the licensed product. Perpetual licenses - Cadence’s perpetual licenses consist of software licensed on a perpetual basis with no right to return or ability to remix the licensed software. Cadence licenses its design IP under a perpetual license on a per-design basis. In general, product revenue associated with perpetual licenses where VSOE exists for the undelivered maintenance is recognized upon delivery of the licensed product, and maintenance revenue is recognized ratably over the maintenance term. If VSOE does not exist for the undelivered maintenance in a perpetual license, product revenue is recognized over the maintenance term. If certain other criteria are met, revenue for design IP is recognized upon delivery and we accrue the expected costs of maintenance. Hardware Revenue Recognition Cadence generally has a minimum of two deliverables in arrangements involving the sale or lease of its hardware products. The first deliverable is the hardware product and software essential to the functionality of the hardware product, and the second deliverable is the right to receive maintenance on the hardware product and its software. Cadence allocates consideration between these deliverables based on the relative standalone selling price for each deliverable. Consideration allocated to the hardware product and its essential software is recognized as revenue at the time of delivery provided all other conditions for revenue recognition have been met. Consideration allocated to maintenance is recognized as revenue ratably over the maintenance term. Services Revenue Recognition Services revenue primarily consists of revenue received for performing engineering services. These services are generally not related to the functionality of the products licensed. In certain instances, Cadence will customize its IP on a fixed fee basis. Revenue from service contracts is recognized either on the time and materials method, as work is performed, or on the percentage-of-completion method. If a service contract is considered to be part of an MEA that includes a software contract, revenue is generally recognized over the duration of the software contract. For contracts with fixed or not-to-exceed fees, Cadence estimates on a monthly basis the percentage-of-completion based on the progress to completion of the services. Cadence has a history of accurately estimating project status and the costs necessary to complete projects. A number of internal and external factors can affect these estimates, including labor rates, utilization and efficiency variances and specification and testing requirement changes. If different conditions were to prevail such that accurate estimates could not be made, then the use of the completed contract method would be required and the recognition of all revenue and costs would be deferred until the project was completed. Such a change could have a material impact on Cadence’s results of operations. Revenue Recognition Criteria Although the timing and amount of revenue recognition differs based on the deliverables in each arrangement, Cadence begins revenue recognition for an arrangement when persuasive evidence of an arrangement exists, delivery has occurred, the fee is fixed or determinable, and collection of the resulting receivable is probable. Persuasive evidence of an arrangement - Generally, Cadence uses a contract signed by the customer as evidence of an arrangement for time-based licenses, licenses of its IP products and hardware leases. If a contract signed by the customer does not exist, Cadence has historically used a purchase order as evidence of an arrangement for software perpetual licenses, hardware sales, maintenance renewals and small fixed-price service projects, such as training classes and small methodology service engagements. For all other service engagements, Cadence uses a signed professional services agreement and a statement of work to evidence an arrangement. In cases where both a signed contract and a purchase order exist, Cadence considers the signed contract to be the most persuasive evidence of the arrangement. Sales through Cadence’s distributors are evidenced by a master agreement governing the relationship, together with binding purchase orders from the distributor on a transaction-by-transaction basis. Product delivery - Software and VIP, and the corresponding access keys, are generally delivered to customers electronically. Electronic delivery occurs when Cadence provides the customer access to the software. Occasionally, Cadence will deliver software on a DVD with standard transfer terms of free-on-board (“F.O.B.”) shipping point. Design IP is also delivered electronically via download from a secure site. Cadence’s software and IP license agreements generally do not contain conditions for acceptance. Delivery of an entire hardware system is deemed to occur upon its successful installation. For certain hardware products, installation is the responsibility of the customer, as the system is fully functional at the time of shipment and delivery is deemed to be complete when the products are shipped with freight terms of F.O.B. shipping point. Fee is fixed or determinable - Cadence assesses whether a fee is fixed or determinable at the outset of the arrangement, primarily based on the payment terms associated with the transaction. Cadence has established a history of collecting under the original contract without providing concessions on payments, products or services. For contracts that do not include a substantial upfront payment, Cadence considers that a fee is fixed or determinable if the arrangement has payment periods that are equal to or less than the term of the licenses and the payments are collected in equal or nearly equal installments, when evaluated over the entire term of the arrangement. Cadence has a history of collecting receivables under software contracts of up to five years for which the fee has been assessed as fixed or determinable. Significant judgment is involved in assessing whether a fee is fixed or determinable. Cadence must also make these judgments when assessing whether a contract amendment to a time-based arrangement (primarily in the context of a license extension or renewal) constitutes a concession. Cadence’s experience has been that it is able to determine whether a fee is fixed or determinable. While Cadence does not expect that experience to change, if Cadence no longer were to have a history of collecting under the original contract without providing concessions, revenue would be required to be recognized when payments become due and payable. Such a change could have a material impact on Cadence’s results of operations. Collection is probable - Cadence assesses the probability of collecting from each customer at the outset of the arrangement based on a number of factors, including the customer’s payment history, its current creditworthiness and geographic location. If in Cadence’s judgment collection of a fee is not probable, Cadence does not record revenue until the uncertainty is removed, which is generally upon receipt of cash payment. Multiple Element Arrangements An MEA is any arrangement that includes or contemplates rights for a combination of software, IP or hardware products, services, training or maintenance in a single arrangement. From time to time, Cadence may include individual deliverables in separately priced and separately executed contracts with the same customer. Cadence evaluates all relevant facts and circumstances in determining whether the separate contracts should be accounted for individually as distinct arrangements or whether the separate contracts are, in substance, an MEA. Significant judgment is involved in determining whether a group of contracts might be so closely related that they are, in effect, part of a single arrangement. Cadence’s judgments about whether several contracts together comprise an MEA can affect the timing of revenue recognition under those contracts, which could have an effect on its results of operations for the periods involved. For an MEA that includes software and nonsoftware elements, Cadence allocates the total consideration based on the relative standalone selling prices of each element. In these circumstances, Cadence is required to use a hierarchy to determine the standalone selling price to be used for allocating consideration to deliverables as follows: • VSOE of fair value; • Third-party evidence of selling price (“TPE”); and • Best estimate of the selling price (“BESP”). Vendor-specific objective evidence of fair value - Cadence’s VSOE for maintenance is based upon the customer’s stated annual renewal rates and VSOE for services is based on the price charged when the services are sold separately. Cadence has not established VSOE for certain products, including software and IP licenses and hardware products, or for annual maintenance that is not cancellable by the customer. Third-party evidence of selling price - TPE is determined based on competitor prices for similar deliverables when sold separately. Generally, Cadence’s offerings contain significant differentiation such that comparable pricing of products with similar functionality cannot be obtained. Furthermore, Cadence is unable to reliably determine what similar competitor products’ selling prices are when those products are sold on a standalone basis. Therefore, Cadence typically is not able to obtain TPE and TPE is not used to determine any standalone selling prices. Best estimate of the selling price - Cadence calculates the BESP of its hardware products based on its pricing practices, including the historical average prices charged for comparable hardware products. Cadence’s process for determining BESP for its software deliverables takes into account multiple factors that vary depending upon the unique facts and circumstances related to each deliverable. Key external and internal factors considered in developing the BESPs include prices charged by Cadence for similar arrangements, historical pricing practices and the nature of the product. In addition, when developing BESPs, Cadence may consider other factors as appropriate, including the pricing of competitive alternatives if they exist, and product-specific business objectives. For MEAs that contain software and nonsoftware elements, Cadence allocates the consideration to software or software-related elements as a group, and to any nonsoftware element separately based on the standalone selling price hierarchy. The consideration allocated to each element is then recognized as revenue when the basic revenue recognition criteria are met for each element. Once the consideration is allocated to the group of software and software-related elements, it then follows the recognition principles of software revenue recognition accounting standards. For MEAs involving only software and software-related deliverables, VSOE must exist to allocate the total fee among all delivered and undelivered elements, or if VSOE of all undelivered elements exists, revenue is recognized using the residual method. Under the residual method, the VSOE of the undelivered elements is deferred and the remaining portion of the arrangement fee is recognized up front as the elements are delivered. If VSOE does not exist for all elements to support the allocation of the total fee among all elements of the arrangement, or if VSOE does not exist for all undelivered elements to apply the residual method, revenue is recognized over the term of the undelivered elements. Other Factors Regarding Revenue Recognition Taxes collected from customers and remitted to governmental authorities - Cadence applies the net basis presentation for taxes collected from customers and remitted to governmental authorities.
Derivative Financial Instruments	Derivative Financial Instruments Cadence enters into foreign currency forward exchange contracts with financial institutions to protect against currency exchange risks associated with existing assets and liabilities. A foreign currency forward exchange contract acts as a hedge by increasing in value when underlying assets decrease in value or underlying liabilities increase in value due to changes in foreign exchange rates. Conversely, a foreign currency forward exchange contract decreases in value when underlying assets increase in value or underlying liabilities decrease in value due to changes in foreign exchange rates. The forward contracts are not designated as accounting hedges and, therefore, the unrealized gains and losses are recognized in other income, net, in advance of the actual foreign currency cash flows. The fair value of these forward contracts is recorded in accrued liabilities or in other current assets. These forward contracts generally have maturities of 90 days or less.
Receivables	Receivables Cadence’s receivables, net includes invoiced accounts receivable and the current portion of unbilled receivables. Unbilled receivables represent amounts Cadence has recorded as revenue for which payments from a customer are due over time. Cadence’s accounts receivable and unbilled receivables were initially recorded at the transaction value. Cadence’s long-term receivables balance includes receivable balances to be invoiced more than one year after each balance sheet date.
Allowance for Doubtful Accounts	Allowances for Doubtful Accounts Each fiscal quarter, Cadence assesses its ability to collect outstanding receivables, and provides allowances for a portion of its receivables when collection is not probable. Cadence analyzes the creditworthiness of its customers, historical experience, changes in customer demand and the overall economic climate in the industries that Cadence serves. Provisions are made based upon a specific review of customer receivables and are recorded in operating expenses.
Inventories	Inventories Inventories are stated at the lower of cost or market value. Cadence’s inventories include high technology parts and components for complex emulation and prototyping hardware systems. These parts and components are specialized in nature and may be subject to rapid technological obsolescence. While Cadence has programs to minimize the required inventories on hand and considers technological obsolescence when estimating required reserves to reduce recorded amounts to market values, it is reasonably possible that such estimates could change in the near term. Cadence’s policy is to reserve for inventory in excess of 12-month demand or for other known obsolescence or realization issues.
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment is stated at historical cost. Depreciation and amortization are generally provided over the estimated useful lives, using the straight-line method, as follows: Computer equipment and related software 2-7 years Buildings 25-32 years Leasehold improvements Shorter of the lease term or the estimated useful life Building improvements and land improvements Estimated useful life up to 32 years Furniture and fixtures 3-5 years Equipment 3-5 years Cadence capitalizes certain costs of software developed for internal use. Capitalization of software developed for internal use begins at the application development phase of the project. Amortization begins when the computer software is substantially complete and ready for its intended use. Amortization is recorded on a straight-line basis over the estimated useful life. Cadence capitalized costs of software developed for internal use of $2.2 million , $3.5 million , and $2.0 million during fiscal 2017 , 2016 and 2015 , respectively. Cadence recorded depreciation and amortization expense of $52.9 million , $52.7 million and $48.7 million during fiscal 2017 , 2016 and 2015 , respectively, for property, plant and equipment.
Software Development Costs	Software Development Costs Software development costs are capitalized beginning when a product’s technological feasibility has been established by completion of a working model of the product and amortization begins when a product is available for general release to customers. The period between the achievement of technological feasibility and the general release of Cadence’s products has typically been of short duration. Costs incurred during fiscal 2017 , 2016 and 2015 were not material.
Goodwill	Goodwill Cadence conducts a goodwill impairment analysis annually and as necessary if changes in facts and circumstances indicate that the fair value of Cadence’s single reporting unit may be less than its carrying amount. Cadence’s goodwill impairment test consists of two steps. The first step requires that Cadence compare the estimated fair value of its single reporting unit to the carrying value of the reporting unit’s net assets, including goodwill. If the fair value of the reporting unit is greater than the carrying value of its net assets, goodwill is not considered to be impaired and no further testing is required. If the fair value of the reporting unit is less than the carrying value of its net assets, Cadence would be required to complete the second step of the test by analyzing the fair value of its goodwill. If the carrying value of the goodwill exceeds its fair value, an impairment charge is recorded.
Long-lived Assets, Including Acquired Intangibles	Long-Lived Assets, Including Acquired Intangibles Cadence’s long-lived assets consist of property, plant and equipment and acquired intangibles. Acquired intangibles with definite lives are amortized on a straight-line basis over the estimated economic life of the underlying products and technologies, which range from two to fourteen years. Acquired intangibles with indefinite lives, or in-process technology, consists of projects that had not reached technological feasibility by the date of acquisition. Upon completion of the project, the assets are amortized over their estimated useful lives. If the project is abandoned rather than completed, the asset is written off. In-process technology is tested for impairment annually and as necessary if changes in facts and circumstances indicate that the assets might be impaired. Cadence reviews its long-lived assets, including acquired intangibles for impairment whenever events or changes in circumstances indicate that the carrying amount of a long-lived asset or asset group may not be recoverable. Recoverability of an asset or asset group is measured by comparison of its carrying amount to the expected future undiscounted cash flows that the asset or asset group is expected to generate. If it is determined that the carrying amount of an asset group is not recoverable, an impairment loss is recorded in the amount by which the carrying amount of the asset or asset group exceeds its fair value.
Non-Marketable Investments	Non-Marketable Investments Cadence’s non-marketable investments include its investments in privately-held companies. These investments are initially recorded at cost and are included in other assets in the consolidated balance sheets. Cadence accounts for these investments using either the cost method or the equity method of accounting. Cadence reviews the fair value of its non-marketable investments on a regular basis to determine whether the investments in these companies are other-than-temporarily impaired. Cadence considers investee financial performance and other information received from the investee companies, as well as any other available estimates of the fair value of the investee companies in its review. If Cadence determines the carrying value of an investment exceeds its fair value, and that difference is other than temporary, Cadence writes down the value of the investment to its fair value. Cadence records investment write-downs in other income, net, in the consolidated income statements.
Nonqualified Deferred Compensation Trust	Nonqualified Deferred Compensation Trust Executive officers, senior management and members of Cadence’s Board of Directors may elect to defer compensation payable to them under Cadence’s Nonqualified Deferred Compensation Plan (“NQDC”). Deferred compensation payments are held in investment accounts and the values of the accounts are adjusted each quarter based on the fair value of the investments held in the NQDC. The selected investments held in the NQDC accounts are classified as trading securities. Trading securities are carried at fair value, with the unrealized gains and losses recognized in the consolidated income statements as other income, net. These trading securities are classified in other assets in the consolidated balance sheets because the securities are not available for Cadence’s use in its operations. Cadence’s obligation with respect to the NQDC trust is recorded in other long-term liabilities on the consolidated balance sheets. Increases and decreases in the NQDC trust liability are recorded as compensation expense in the consolidated income statements.
Deferred Revenue	Deferred Revenue Deferred revenue arises when customers are billed for products or services in advance of revenue recognition. Cadence’s deferred revenue consists primarily of unearned revenue on product licenses and the related maintenance for which revenue is recognized over the duration of the license. The fees for time-based licenses are generally billed quarterly in advance and the related revenue is recognized over multiple periods over the ensuing license period. Maintenance on perpetual licenses is generally renewed annually, billed in full in advance, and the corresponding revenue is recognized over the 12 -month maintenance term.
Comprehensive Income	Comprehensive Income Cadence reports comprehensive income in the consolidated statements of comprehensive income. Accumulated other comprehensive income (loss) is reported as a component of stockholders’ equity and includes foreign currency translation gains and losses, changes in defined benefit plan liabilities, and unrealized gains and losses on marketable securities that are available for sale.
Accounting for Income Taxes	Accounting for Income Taxes Cadence accounts for the effect of income taxes in its consolidated financial statements using the asset and liability method. This process involves estimating actual current tax liabilities together with assessing carryforwards and temporary differences resulting from differing treatment of items, such as depreciation, for tax and accounting purposes. These differences result in deferred tax assets and liabilities, measured using enacted tax rates expected to apply to taxable income in the years when those temporary differences are expected to be recovered or settled. Cadence then records a valuation allowance to reduce the deferred tax assets to the amount that Cadence believes is more likely than not to be realized based on its judgment of all available positive and negative evidence. The weight given to the potential effect of negative and positive evidence is commensurate with the extent to which the strength of the evidence can be objectively verified. This assessment, which is completed on a taxing jurisdiction basis, takes into account a number of types of evidence, including the following: • The nature and history of current or cumulative financial reporting income or losses; • Sources of future taxable income; • The anticipated reversal or expiration dates of the deferred tax assets; and • Tax planning strategies. Cadence takes a two-step approach to recognizing and measuring the financial statement benefit of uncertain tax positions. The first step is to evaluate the tax position for recognition by determining whether the weight of available evidence indicates that it is more likely than not that the tax position will be sustained on audit, including resolution of any related appeals or litigation processes. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon settlement of the audit. Cadence classifies interest and penalties on unrecognized tax benefits as income tax expense or benefit. The Tax Cuts and Jobs Act was enacted in December 2017 (the “Tax Act”) and includes significant changes to U.S. taxation of corporations. The Tax Act requires Cadence to include in its taxable income its share of global intangible low-taxed income beginning from fiscal 2018. Cadence has not completed its analysis on whether to adopt the accounting policy to recognize deferred taxes for the global intangible low-taxed income inclusion or to recognize global intangible low-tax income as tax expense in the period incurred. Cadence expects to finalize its accounting policy during fiscal 2018 upon obtaining, preparing and analyzing its estimated global intangible low-taxed income. For additional discussion of income taxes, see Note 6 in the notes to the consolidated financial statements.
Restructuring Charges	Restructuring Charges Cadence records personnel-related restructuring charges with customary termination benefits when the costs are both probable and estimable. Cadence records personnel-related restructuring charges with non-customary termination benefits when the plan has been communicated to the affected employees. Cadence records facilities-related restructuring charges in the period in which the affected facilities are vacated. In connection with facilities-related restructuring plans, Cadence has made a number of estimates and assumptions related to losses on excess facilities that have been vacated or consolidated, particularly the timing of subleases and sublease terms. Closure and space reduction costs included in the restructuring charges include payments required under leases less any applicable estimated sublease income after the facilities are abandoned, lease buyout costs and certain contractual costs to maintain facilities during the period after abandonment. Cadence records estimated provisions for termination benefits and outplacement costs along with other personnel-related restructuring costs, long-term asset impairments related to abandoned assets and other costs associated with the restructuring plan. Cadence regularly evaluates the adequacy of its lease loss accruals and severance and related benefits accruals, and adjusts the balances based on actual costs incurred or changes in estimates and assumptions. Subsequent adjustments to restructuring accruals are classified in restructuring and other charges in the consolidated income statements.
Stock-Based Compensation	Stock-Based Compensation Cadence recognizes the cost of employee services received in exchange for awards of equity instruments as stock-based compensation expense. Stock-based compensation expense is measured at the grant date based on the value of the award and is recognized as expense over the requisite service period, which is typically the vesting period. Cadence recognizes stock-based compensation expense on the straight-line method for awards that only contain a service condition and on the graded-vesting method for awards that contain both a service and performance condition. Cadence recognizes the impact of forfeitures on stock-based compensation expense as they occur. The fair value of stock options and purchase rights issued under Cadence’s Employee Stock Purchase Plan (“ESPP”) are calculated using the Black-Scholes option pricing model. The computation of the expected volatility assumption used for new awards is based on implied volatility when the remaining maturities of the underlying traded options are at least one year. When the remaining maturities of the underlying traded options are less than one year, expected volatility is based on a weighting of historical and implied volatilities. When determining the expected term, Cadence reviews historical employee exercise behavior from options having similar vesting periods. The risk-free interest rate for the period within the expected term of the option is based on the yield of United States Treasury notes for the comparable term in effect at the time of grant. The expected dividend yield used in the calculation is zero because Cadence has not historically paid and currently does not expect to pay dividends in the foreseeable future.
Treasury Stock	Treasury Stock Cadence generally issues shares related to its stock-based compensation plans from shares held in treasury. When treasury stock is reissued at an amount higher than its cost, the difference is recorded as a component of capital in excess of par in the consolidated statements of stockholders’ equity. When treasury stock is reissued at an amount lower than its cost, the difference is recorded as a component of capital in excess of par to the extent that gains exist to offset the losses. If there are no accumulated treasury stock gains in capital in excess of par, the losses upon reissuance of treasury stock are recorded as a component of retained earnings (accumulated deficit) in the consolidated statements of stockholders’ equity. There were no losses recorded by Cadence on the reissuance of treasury stock during fiscal 2017 , 2016 or 2015 .
Concentrations of Credit Risk	Concentrations of Credit Risk Financial instruments, including derivative financial instruments, that may potentially subject Cadence to concentrations of credit risk, consist principally of cash and cash equivalents, short-term investments, long-term investments, accounts receivable and forward contracts. Credit exposure related to Cadence’s foreign currency forward contracts is limited to the realized and unrealized gains on these contracts.
Advertising	Advertising Cadence expenses the costs of advertising as incurred. Total advertising expense, including marketing programs and events, was $7.4 million , $8.4 million and $7.9 million during fiscal 2017 , 2016 and 2015 , respectively, and is included in marketing and sales in the consolidated income statements.
Commitments and Contingencies	At least quarterly, Cadence reviews the status of each significant matter and assesses its potential financial exposure. If the potential loss from any claim or legal proceeding is considered probable and the amount or the range of loss can be estimated, Cadence accrues a liability for the estimated loss. Legal proceedings are subject to uncertainties, and the outcomes are difficult to predict. Because of such uncertainties, accruals are based on Cadence’s judgments using the best information available at the time. As additional information becomes available, Cadence reassesses the potential liability related to pending claims and litigation matters and may revise estimates.
Fair Value of Financial Instruments	Inputs to valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect Cadence’s market assumptions. These two types of inputs have created the following fair value hierarchy: • Level 1 – Quoted prices for identical instruments in active markets; • Level 2 – Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets; and • Level 3 – Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. This hierarchy requires Cadence to minimize the use of unobservable inputs and to use observable market data, if available, when determining fair value. Cadence recognizes transfers between levels of the hierarchy based on the fair values of the respective financial instruments at the end of the reporting period in which the transfer occurred.

Summary of Significant Accoun28

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 30, 2017
Accounting Policies [Abstract]
Depreciation and amortization over the estimated useful lives, using the straight-line method	Depreciation and amortization are generally provided over the estimated useful lives, using the straight-line method, as follows: Computer equipment and related software 2-7 years Buildings 25-32 years Leasehold improvements Shorter of the lease term or the estimated useful life Building improvements and land improvements Estimated useful life up to 32 years Furniture and fixtures 3-5 years Equipment 3-5 years

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 30, 2017
Debt Disclosure [Abstract]
Summary of debt outstanding	Cadence’s outstanding debt as of December 30, 2017 and December 31, 2016 was as follows: December 30, 2017 December 31, 2016 (In thousands) Principal Unamortized Discount Carrying Value Principal Unamortized Discount Carrying Value Revolving Credit Facility $ 85,000 $ — $ 85,000 $ 50,000 $ — $ 50,000 2019 Term Loan 300,000 (226 ) 299,774 300,000 (434 ) 299,566 2024 Notes 350,000 (5,405 ) 344,595 350,000 (6,073 ) 343,927 Total outstanding debt $ 735,000 $ (5,631 ) $ 729,369 $ 700,000 $ (6,507 ) $ 693,493

Cash, Cash Equivalents and In30

Cash, Cash Equivalents and Investments (Tables)	12 Months Ended
	Dec. 30, 2017
Cash, Cash Equivalents and Investments [Abstract]
Summary of cash, cash equivalents and short-term investments	Cadence’s cash, cash equivalents and short-term investments at fair value as of December 30, 2017 and December 31, 2016 were as follows: As of December 30, 2017 December 31, 2016 (In thousands) Cash and cash equivalents $ 688,087 $ 465,232 Short-term investments 4,455 3,057 Cash, cash equivalents and short-term investments $ 692,542 $ 468,289
Summary of cash and cash equivalents	The following table summarizes Cadence’s cash and cash equivalents at fair value as of December 30, 2017 and December 31, 2016 : As of December 30, December 31, (In thousands) Cash and interest bearing deposits $ 184,153 $ 227,508 Money market funds 503,934 237,724 Total cash and cash equivalents $ 688,087 $ 465,232
Summary of short-term investments	The following tables summarize Cadence’s short-term investments as of December 30, 2017 and December 31, 2016 : As of December 30, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Marketable equity securities $ 1,817 $ 2,638 $ — $ 4,455 As of December 31, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Marketable equity securities $ 2,131 $ 926 $ — $ 3,057
Carrying value of non-marketable securities	Cadence’s non-marketable investments as of December 30, 2017 and December 31, 2016 were as follows: As of December 30, December 31, (In thousands) Cost method $ 532 $ 532 Equity method 2,460 2,634 Total non-marketable investments $ 2,992 $ 3,166

Receivables, net (Tables)

Receivables, net (Tables)	12 Months Ended
	Dec. 30, 2017
Receivables [Abstract]
Current and long-term accounts receivable balances	Cadence’s current and long-term receivables balances as of December 30, 2017 and December 31, 2016 were as follows: As of December 30, December 31, (In thousands) Accounts receivable $ 119,325 $ 85,554 Unbilled accounts receivable 71,101 71,617 Long-term receivables 12,239 12,949 Total receivables 202,665 170,120 Less allowance for doubtful accounts — — Total receivables, net $ 202,665 $ 170,120
Allowance for Doubtful Accounts Receivable [Roll Forward]	Cadence’s provisions for losses on its accounts receivable during fiscal 2017 , 2016 and 2015 were as follows: Balance at Beginning of Period Charged to Costs and Expenses Uncollectible Accounts Written Off, Net Balance at End of Period Year ended December 30, 2017 $ — $ 2,623 $ (2,623 ) $ — Year ended December 31, 2016 — 308 (308 ) — Year ended January 2, 2016 $ — $ 126 $ (126 ) $ —

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 30, 2017
Income Tax Disclosure [Abstract]
Income before provision for income taxes	Cadence’s income before provision for income taxes included income from the United States and from foreign subsidiaries for fiscal 2017 , 2016 and 2015 , was as follows: 2017 2016 2015 (In thousands) United States $ 81,619 $ 84,694 $ 47,867 Foreign subsidiaries 233,427 152,459 219,729 Total income before provision for income taxes $ 315,046 $ 237,153 $ 267,596
Components of income taxes provision	Cadence’s provision for income taxes was comprised of the following items for fiscal 2017 , 2016 and 2015 : 2017 2016 2015 (In thousands) Current: Federal $ (2,193 ) $ 4,839 $ (10,265 ) State and local (2,097 ) 50 (713 ) Foreign 35,301 34,047 24,622 Total current 31,011 38,936 13,644 Deferred: Federal 76,494 (5,291 ) (13,165 ) State and local 5,571 6,006 1,751 Foreign (2,131 ) (5,584 ) (1,734 ) Total deferred 79,934 (4,869 ) (13,148 ) Tax expense allocated to shareholders’ equity — — 14,683 Total provision for income taxes $ 110,945 $ 34,067 $ 15,179
Summary of income tax reconciliation	The provision for income taxes differs from the amount estimated by applying the United States statutory federal income tax rate of 35% to income before provision for income taxes for fiscal 2017 , 2016 and 2015 as follows: 2017 2016 2015 (In thousands) Provision computed at federal statutory income tax rate $ 110,266 $ 83,003 $ 93,659 State and local income tax, net of federal tax effect 5,867 5,534 3,621 Foreign income tax rate differential (65,296 ) (36,098 ) (56,873 ) Impact of 2017 Tax Act* 96,798 — — Stock-based compensation (24,455 ) (13,132 ) 2,687 Change in deferred tax asset valuation allowance 4,689 1,243 (11,066 ) Tax credits (26,789 ) (39,765 ) (19,243 ) Repatriation of foreign earnings — 25,145 50 Tax effects of intra-entity transfer of assets (8,450 ) (7,661 ) (7,928 ) Domestic production activity deduction (2,474 ) (2,826 ) — Withholding taxes 11,225 9,870 5,119 Tax settlements, foreign 3,086 5,620 — Increase in unrecognized tax benefits not included in tax settlements 4,054 614 3,530 Other 2,424 2,520 1,623 Provision for income taxes $ 110,945 $ 34,067 $ 15,179 Effective tax rate 35 % 14 % 6 %
Components of deferred tax assets and liabilities	The components of deferred tax assets and liabilities consisted of the following as of December 30, 2017 and December 31, 2016 : As of December 30, December 31, (In thousands) Deferred tax assets: Tax credit carryforwards $ 164,687 $ 180,999 Reserves and accruals 42,357 62,438 Intangible assets 13,112 23,335 Capitalized research and development expense for income tax purposes 10,621 19,093 Operating loss carryforwards 20,650 23,175 Deferred income 12,178 14,842 Capital loss carryforwards 20,266 20,580 Stock-based compensation costs 15,782 20,087 Depreciation and amortization 7,665 12,202 Investments 3,201 6,442 Prepaid expenses — 26,526 Total deferred tax assets 310,519 409,719 Valuation allowance (95,491 ) (92,920 ) Net deferred tax assets 215,028 316,799 Deferred tax liabilities: Intangible assets (36,683 ) (35,651 ) Undistributed foreign earnings (23,563 ) (24,529 ) Other (2,730 ) (119 ) Total deferred tax liabilities (62,976 ) (60,299 ) Total net deferred tax assets $ 152,052 $ 256,500
Summary of operating loss carryforward	As of December 30, 2017 , Cadence’s operating loss carryforwards were as follows: Amount Expiration Periods (In thousands) Federal $ 13,638 from 2021 through 2036 California 198,173 from 2019 through 2036 Other states (tax effected, net of federal benefit) 3,081 from 2019 through 2037 Foreign (tax effected) 866 from 2025 through indefinite
Summary of tax credit carryforwards	As of December 30, 2017 , Cadence had tax credit carryforwards of: Amount Expiration Periods (In thousands) Federal* $ 87,746 from 2023 through 2037 California 52,628 indefinite Other states 9,153 from 2018 through 2037 Foreign 15,160 from 2018 through 2037 _____________ *Certain of Cadence’s foreign tax credits have yet to be realized and as a result do not yet have an expiration period.
Earliest tax years open to examination by jurisdiction	As of December 30, 2017 Cadence’s earliest tax years that remain open to examination and the assessment of additional tax include: Jurisdiction Earliest Tax Year Open to Examination United States - Federal 2014 United States - California 2013 Hungary 2012
Unrecognized tax benefits roll forward	The changes in Cadence’s gross amount of unrecognized tax benefits during fiscal 2017 , 2016 and 2015 are as follows: 2017 2016 2015 (In thousands) Unrecognized tax benefits at the beginning of the fiscal year $ 98,540 $ 87,820 $ 97,224 Gross amount of the increases (decreases) in unrecognized tax benefits of tax positions taken during a prior year* 688 (155 ) (7,331 ) Gross amount of the increases in unrecognized tax benefits as a result of tax positions taken during the current year 13,141 11,342 7,513 Amount of decreases in unrecognized tax benefits relating to settlements with taxing authorities, including the utilization of tax attributes — — (9,571 ) Reductions to unrecognized tax benefits resulting from the lapse of the applicable statute of limitations (3,028 ) (149 ) (119 ) Effect of foreign currency translation 838 (318 ) 104 Unrecognized tax benefits at the end of the fiscal year $ 110,179 $ 98,540 $ 87,820 Total amounts of unrecognized tax benefits that, if upon resolution of the uncertain tax positions would reduce Cadence’s effective tax rate $ 63,108 $ 56,248 $ 48,335 _________ * Includes unrecognized tax benefits of tax positions recorded in connection with acquisitions
Interest and penalties recognized in consolidated income statements and balance sheets	The total amounts of interest, net of tax, and penalties recognized in the consolidated income statements as provision (benefit) for income taxes for fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 (In thousands) Interest $ 1,865 $ 1,166 $ 110 Penalties 218 3 (127 ) The total amounts of gross accrued interest and penalties recognized in the consolidated balance sheets as of December 30, 2017 and December 31, 2016 were as follows: As of December 30, December 31, (In thousands) Interest $ 2,511 $ 1,332 Penalties 151 265

Goodwill and Acquired Intangi33

Goodwill and Acquired Intangibles (Tables)	12 Months Ended
	Dec. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in the carrying amount of goodwill	The changes in the carrying amount of goodwill during fiscal 2017 and 2016 were as follows: Gross Carrying Amount (In thousands) Balance as of January 2, 2016 $ 551,772 Goodwill resulting from acquisitions 23,579 Effect of foreign currency translation (2,587 ) Balance as of December 31, 2016 572,764 Goodwill resulting from acquisitions 90,218 Effect of foreign currency translation 3,027 Balance as of December 30, 2017 $ 666,009
Acquired intangibles with finite lives (excluding goodwill), excluding intangibles fully amortized at end of prior fiscal year	Acquired intangibles as of December 31, 2016 were as follows, excluding intangibles that were fully amortized as of January 2, 2016 : Gross Carrying Amount Accumulated Amortization Acquired Intangibles, Net (In thousands) Existing technology $ 342,108 $ (160,178 ) $ 181,930 Agreements and relationships 174,623 (100,778 ) 73,845 Tradenames, trademarks and patents 9,806 (6,767 ) 3,039 Total acquired intangibles $ 526,537 $ (267,723 ) $ 258,814 Acquired intangibles as of December 30, 2017 were as follows, excluding intangibles that were fully amortized as of December 31, 2016 : Gross Carrying Amount Accumulated Amortization Acquired Intangibles, Net (In thousands) Existing technology $ 342,810 $ (199,529 ) $ 143,281 Agreements and relationships 151,063 (90,675 ) 60,388 Tradenames, trademarks and patents 10,918 (7,252 ) 3,666 Total acquired intangibles with definite lives 504,791 (297,456 ) 207,335 In-process technology 71,500 — 71,500 Total acquired intangibles $ 576,291 $ (297,456 ) $ 278,835
Amortization of acquired intangibles	Amortization expense for fiscal 2017 , 2016 and 2015 , by consolidated income statement caption, was as follows: 2017 2016 2015 (In thousands) Cost of product and maintenance $ 41,781 $ 42,387 $ 40,532 Amortization of acquired intangibles 14,716 18,095 23,716 Total amortization of acquired intangibles $ 56,497 $ 60,482 $ 64,248
Estimated amortization expense	Estimated amortization expense for intangible assets with definite lives for the following five fiscal years and thereafter was as follows: (In thousands) 2018 $ 53,346 2019 46,239 2020 40,621 2021 36,115 2022 17,810 Thereafter 13,204 Total estimated amortization expense $ 207,335

Stock Repurchase Programs (Tabl

Stock Repurchase Programs (Tables)	12 Months Ended
	Dec. 30, 2017
Equity [Abstract]
Share repurchased and the total cost of shares repurchased	The shares repurchased under Cadence’s repurchase authorizations and the total cost of repurchased shares, including commissions, during fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 (In thousands) Shares repurchased 2,495 40,493 16,255 Total cost of repurchased shares $ 100,025 $ 960,289 $ 333,189

Stock Compensation Plans and 35

Stock Compensation Plans and Stock Based Compensation (Tables)	12 Months Ended
	Dec. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock based compensation expense and allocation by share based payment award	Stock-based compensation expense and the related income tax benefit recognized in connection with stock options, restricted stock and the ESPP during fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 (In thousands) Stock options $ 5,417 $ 5,649 $ 7,903 Restricted stock 117,797 96,989 78,615 ESPP 6,809 6,579 5,823 Total stock-based compensation expense $ 130,023 $ 109,217 $ 92,341 Income tax benefit $ 36,664 $ 30,980 $ 24,294
Stock based compensation expense and allocation by cost	Stock-based compensation expense is reflected in Cadence’s consolidated income statements during fiscal 2017 , 2016 and 2015 as follows: 2017 2016 2015 (In thousands) Cost of product and maintenance $ 2,218 $ 1,995 $ 2,436 Cost of services 3,232 2,911 3,561 Marketing and sales 26,838 22,700 21,654 Research and development 77,222 64,061 49,755 General and administrative 20,513 17,550 14,935 Total stock-based compensation expense $ 130,023 $ 109,217 $ 92,341
Fair value of options granted and the weighted-average assumptions	The weighted-average grant date fair value of options granted and the weighted-average assumptions used in the model for fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 Dividend yield None None None Expected volatility 21.2 % 31.5 % 26.8 % Risk-free interest rate 2.01 % 1.21 % 1.61 % Expected term (in years) 4.8 4.8 5.0 Weighted-average fair value of options granted $ 6.86 $ 5.84 $ 4.60
Summary of changes in stock options outstanding under equity incentive plans	A summary of the changes in stock options outstanding under Cadence’s equity incentive plans during fiscal 2017 is presented below: Weighted- Average Weighted- Average Remaining Contractual Terms Aggregate Intrinsic Shares Exercise Price (Years) Value (In thousands) (In thousands) Options outstanding as of December 31, 2016 7,117 $ 13.61 Granted 820 30.72 Exercised (1,957 ) 11.37 Canceled and forfeited (197 ) 20.52 Options outstanding as of December 30, 2017 5,783 $ 16.56 3.8 $ 110,114 Options vested as of December 30, 2017 4,104 $ 13.72 3.2 $ 89,790
Intrinsic value of and cash received from options exercised	The total intrinsic value of and cash received from options exercised during fiscal 2017 , 2016 and 2015 was: 2017 2016 2015 (In thousands) Intrinsic value of options exercised $ 45,643 $ 44,835 $ 67,363 Cash received from options exercised 22,255 30,984 52,261
Stock-based compensation expense related to performance-based restricted stock grants	Stock-based compensation expense related to performance-based restricted stock grants for fiscal 2017 , 2016 and 2015 was as follows: 2017 2016 2015 (In thousands) Stock-based compensation expense related to performance-based grants $ 8,224 $ 9,195 $ 5,544
Summary of the changes in restricted stock outstanding under Cadence's equity incentive plans	A summary of the changes in restricted stock outstanding under Cadence’s equity incentive plans during fiscal 2017 , is presented below: Weighted- Average Grant Date Weighted- Average Remaining Vesting Terms Aggregate Intrinsic Shares Fair Value (Years) Value (In thousands) (In thousands) Unvested shares as of December 31, 2016 12,082 $ 20.40 Granted 5,909 34.48 Vested (5,121 ) 20.75 Forfeited (902 ) 21.49 Unvested shares as of December 30, 2017 11,968 $ 27.11 1.1 $ 500,231
Total fair value of restricted stock awards that vested	The total fair value realized by employees upon vesting of restricted stock during fiscal 2017 , 2016 and 2015 was: 2017 2016 2015 (In thousands) Fair value of restricted stock realized upon vesting $ 174,548 $ 113,114 $ 99,564
Weighted-average grant date fair value of purchase rights granted under ESPP and weighted average assumptions used in model	The weighted-average grant date fair value of purchase rights granted under the ESPP and the weighted-average assumptions used in the model for fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 Dividend yield None None None Expected volatility 20.4 % 24.4 % 22.9 % Risk-free interest rate 0.92 % 0.43 % 0.13 % Expected term (in years) 0.5 0.5 0.5 Weighted-average fair value of options granted $ 6.64 $ 4.85 $ 4.23
Shares of common stock issued under Employee Stock Purchase Plan	Shares of common stock issued under the ESPP for fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 (In thousands, except per share amounts) Cadence shares purchased under the ESPP 1,270 1,471 1,519 Cash received for the purchase of shares under the ESPP $ 26,709 $ 24,450 $ 22,449 Weighted-average purchase price per share $ 21.04 $ 16.62 $ 14.78
Summary of common stock reserved for future issuance	As of December 30, 2017 , Cadence had reserved the following shares of authorized but unissued common stock for future issuance: Shares (In thousands) Employee equity incentive plans* 18,663 Employee stock purchase plans 3,920 Directors stock plans* 1,298 Total 23,881 _____________ * Includes shares reserved for: (i) issuance upon exercise of future option grants, (ii) issuance upon vesting of future restricted stock grants, (iii) outstanding but unexercised options to purchase common stock, or (iv) unvested restricted stock units.

Restructuring and Other Charg36

Restructuring and Other Charges (Tables)	12 Months Ended
	Dec. 30, 2017
Restructuring and Related Activities [Abstract]
Restructuring reserve rollforward by major type of cost	The following table presents activity for Cadence’s restructuring plans during fiscal 2017 , 2016 and 2015 : Severance and Benefits Excess Facilities Other Total (In thousands) Balance, January 3, 2015 $ 4,462 $ 1,267 $ 481 $ 6,210 Restructuring and other charges (credits), net 3,636 1,095 (220 ) 4,511 Non-cash charges — (116 ) — (116 ) Cash payments (7,322 ) (1,798 ) (261 ) (9,381 ) Effect of foreign currency translation (25 ) (62 ) — (87 ) Balance, January 2, 2016 $ 751 $ 386 $ — $ 1,137 Restructuring and other charges, net 40,411 544 — 40,955 Non-cash charges — (159 ) — (159 ) Cash payments (16,890 ) (679 ) — (17,569 ) Effect of foreign currency translation 130 (34 ) — 96 Balance, December 31, 2016 $ 24,402 $ 58 $ — $ 24,460 Restructuring and other charges, net 9,027 379 — 9,406 Cash payments (20,170 ) (186 ) — (20,356 ) Effect of foreign currency translation 276 (2 ) — 274 Balance, December 30, 2017 $ 13,535 $ 249 $ — $ 13,784
Schedule of restructuring reserve by balance sheet classification	The remaining liability for Cadence’s restructuring plans is recorded in the consolidated balance sheet as follows: As of December 30, 2017 (In thousands) Accounts payable and accrued liabilities $ 13,619 Other long-term liabilities 165 Total liabilities $ 13,784

Other Income, Net (Tables)

Other Income, Net (Tables)	12 Months Ended
	Dec. 30, 2017
Other Income and Expenses [Abstract]
Other income, net	Cadence’s other income, net, for fiscal 2017 , 2016 and 2015 was as follows: 2017 2016 2015 (In thousands) Interest income $ 3,879 $ 2,917 $ 2,667 Gains on sale of marketable debt and equity securities, net 520 317 21 Gains on non-marketable investments 8,934 2,668 2,348 Gains (losses) on securities in NQDC trust 6,145 1,741 (369 ) Gains (losses) on foreign exchange (2,920 ) 6,879 5,606 Gain on sale of property, plant and equipment — 923 — Other income, net 197 477 204 Total other income, net $ 16,755 $ 15,922 $ 10,477

Net Income Per Share (Tables)

Net Income Per Share (Tables)	12 Months Ended
	Dec. 30, 2017
Earnings Per Share [Abstract]
Basic and diluted net income per share	The calculations for basic and diluted net income per share for fiscal 2017 , 2016 and 2015 are as follows: 2017 2016 2015 (In thousands, except per share amounts) Net income $ 204,101 $ 203,086 $ 252,417 Weighted-average common shares used to calculate basic net income per share 272,097 284,502 288,018 2015 Warrants — — 16,434 Stock-based awards 8,124 6,754 7,850 Weighted-average common shares used to calculate diluted net income per share 280,221 291,256 312,302 Net income per share - basic $ 0.75 $ 0.71 $ 0.88 Net income per share - diluted $ 0.73 $ 0.70 $ 0.81
Potential shares of Cadence's common stock excluded	The following table presents shares of Cadence’s common stock outstanding for fiscal 2017 , 2016 and 2015 that were excluded from the computation of diluted net income per share because the effect of including these shares in the computation of diluted net income per share would have been anti-dilutive: 2017 2016 2015 (In thousands) Long-term performance-based awards 152 1,069 — Options to purchase shares of common stock 303 581 1,029 Non-vested shares of restricted stock 77 27 60 Total potential common shares excluded 532 1,677 1,089

Balance Sheet Components (Table

Balance Sheet Components (Tables)	12 Months Ended
	Dec. 30, 2017
Balance Sheet Components [Abstract]
Summary of certain balance sheet components	A summary of certain balance sheet components as of December 30, 2017 and December 31, 2016 is as follows: As of December 30, December 31, (In thousands) Inventories: Raw materials $ 17,491 $ 26,589 Finished goods 15,718 12,886 Inventories $ 33,209 $ 39,475 Property, plant and equipment: Computer equipment and related software $ 537,144 $ 503,543 Buildings 127,478 126,023 Land 55,840 55,785 Leasehold, building and land improvements 106,173 95,040 Furniture and fixtures 27,590 23,580 Equipment 50,340 44,119 In-process capital assets 5,154 3,478 Total cost 909,719 851,568 Less: Accumulated depreciation and amortization (658,377 ) (612,961 ) Property, plant and equipment, net $ 251,342 $ 238,607 Other assets: Deferred income taxes $ 152,501 $ 256,547 Other long-term assets 77,800 55,193 Other assets $ 230,301 $ 311,740 Accounts payable and accrued liabilities: Payroll and payroll-related accruals $ 164,310 $ 174,936 Accounts payable 4,825 4,367 Income taxes payable - current 3,936 18,382 Accrued operating liabilities 48,030 41,811 Accounts payable and accrued liabilities $ 221,101 $ 239,496

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Schedule of rent expense	Rental expense is recognized on a straight-line basis and was as follows during fiscal 2017 , 2016 and 2015 : 2017 2016 2015 (In thousands) Rent expense $ 32,089 $ 28,216 $ 27,406
Schedule of future minimum lease payments for operating leases	As of December 30, 2017 , future minimum lease payments under non-cancelable operating leases were as follows: Operating Leases For the fiscal years: (In thousands) 2018 $ 28,090 2019 20,641 2020 12,514 2021 10,013 2022 7,042 Thereafter 21,721 Total lease payments $ 100,021

Fair Value (Tables)

Fair Value (Tables)	12 Months Ended
	Dec. 30, 2017
Fair Value Disclosures [Abstract]
Fair value of financial assets and liabilities	The fair value of financial assets and liabilities was determined using the following levels of inputs as of December 30, 2017 and December 31, 2016 : Fair Value Measurements as of December 30, 2017: Total Level 1 Level 2 Level 3 (In thousands) Assets Cash equivalents: Money market funds $ 503,934 $ 503,934 $ — $ — Short-term investments: Marketable equity securities 4,455 4,455 — — Trading securities held in NQDC trust 31,473 31,473 — — Foreign currency exchange contracts 2,937 — 2,937 — Total Assets $ 542,799 $ 539,862 $ 2,937 $ — As of December 30, 2017, Cadence did not have any financial liabilities requiring a recurring fair value measurement. Fair Value Measurements as of December 31, 2016: Total Level 1 Level 2 Level 3 (In thousands) Assets Cash equivalents: Money market funds $ 237,724 $ 237,724 $ — $ — Short-term investments: Marketable equity securities 3,057 3,057 — — Trading securities held in NQDC trust 26,622 26,622 — — Total Assets $ 267,403 $ 267,403 $ — $ — Total Level 1 Level 2 Level 3 (In thousands) Liabilities Foreign currency exchange contracts $ 2,653 $ — $ 2,653 $ —

Employee and Director Benefit42

Employee and Director Benefit Plans (Tables)	12 Months Ended
	Dec. 30, 2017
Retirement Benefits [Abstract]
Contributions to defined contribution plans	Cadence’s total contributions made to these plans during fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 (In thousands) Contributions to defined contribution plans $ 26,010 $ 24,185 $ 22,337
Net recognized gains of trading securities	Net recognized gains (loss) of trading securities during fiscal 2017 , 2016 and 2015 were as follows: 2017 2016 2015 (In thousands) Trading securities $ 6,145 $ 1,741 $ (369 )
Unfunded projected benefit obligations - defined benefit retirement plans	The unfunded projected benefit obligation for these retirement plans as of December 30, 2017 , December 31, 2016 and January 2, 2016 was as follows: December 30, December 31, January 2, (In thousands) Unfunded projected benefit obligation - defined benefit retirement plans $ 6,976 $ 6,164 $ 6,131
Expense related to defined benefit plans	Cadence recorded total expense related to these defined benefit retirement plans during fiscal 2017 , 2016 and 2015 as follows: 2017 2016 2015 (In thousands) Expense related to defined benefit retirement plans $ 1,214 $ 670 $ 1,359

Other Comprehensive Loss (Table

Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 30, 2017
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated other comprehensive income net of tax	Accumulated other comprehensive loss was comprised of the following as of December 30, 2017 , and December 31, 2016 : As of December 30, December 31, (In thousands) Foreign currency translation loss $ (2,976 ) $ (22,370 ) Changes in defined benefit plan liabilities (3,292 ) (3,716 ) Unrealized holding gains on available-for-sale securities 2,638 926 Total accumulated other comprehensive loss $ (3,630 ) $ (25,160 )
Changes in unrealized holding gains or losses on available-for-sale securities	Changes in unrealized holding gains on available-for-sale securities includes the following for fiscal 2017 , 2016 and 2015 : 2017 2016 2015 (In thousands) Unrealized holding gains $ 2,231 $ 770 $ 202 Reclassification of unrealized holding gains to other income, net (519 ) (54 ) (33 ) Changes in unrealized holding gains $ 1,712 $ 716 $ 169

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 30, 2017
Segment Reporting [Abstract]
Summary of revenue by geography	The following table presents a summary of revenue by geography for fiscal 2017 , 2016 and 2015 : 2017 2016 2015 (In thousands) Americas: United States $ 829,436 $ 832,583 $ 782,419 Other Americas 35,067 31,296 25,960 Total Americas 864,503 863,879 808,379 Asia 526,201 445,500 413,588 Europe, Middle East and Africa 385,705 346,701 316,684 Japan 166,623 160,003 163,440 Total $ 1,943,032 $ 1,816,083 $ 1,702,091
Summary of long-lived assets by geography	The following table presents a summary of long-lived assets by geography as of December 30, 2017 , December 31, 2016 and January 2, 2016 : As of December 30, December 31, January 2, (In thousands) Americas: United States $ 198,744 $ 193,750 $ 189,665 Other Americas 611 757 387 Total Americas 199,355 194,507 190,052 Asia 37,678 30,564 24,767 Europe, Middle East and Africa 13,615 12,692 12,832 Japan 694 844 948 Total $ 251,342 $ 238,607 $ 228,599

Summary of Significant Accoun45

Summary of Significant Accounting Policies - New Accounting Standards Not Yet Adopted (Details) - Accounting Standards Update 2014-09 [Member]	12 Months Ended
	Dec. 29, 2018	Dec. 31, 2017
Scenario, Forecast [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of Revenue Mix Recognizable Over Time	90.00%
Scenario, Plan [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of Existing Backlog To Be Adjusted Through Retained Earnings		3.00%

Summary of Significant Accoun46

Summary of Significant Accounting Policies - Debt and Derivatives (Details)	12 Months Ended
	Dec. 30, 2017
Forward Contracts [Member]
Derivative [Line Items]
Maturity period of forward contracts	90 days

Summary of Significant Accoun47

Summary of Significant Accounting Policies - Property, Plant and Equipment (Details)	12 Months Ended
	Dec. 30, 2017
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives description	Shorter of the lease term or the estimated useful life
Building improvements and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives description	Estimated useful life up to 32 years
Minimum [Member] | Computer equipment and related software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	2 years
Minimum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	25 years
Minimum [Member] | Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Minimum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Maximum [Member] | Computer equipment and related software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	7 years
Maximum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	32 years
Maximum [Member] | Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Maximum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years

Summary of Significant Accoun48

Summary of Significant Accounting Policies - Long-lived Assets (Details) - Acquired Intangible Assets [Member]	12 Months Ended
	Dec. 30, 2017
Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	2 years
Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	14 years

Summary of Significant Accoun49

Summary of Significant Accounting Policies - Other (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Summary of Significant Accounting Policies (Additional Textual) [Abstract]
Reserve for inventory	inventory in excess of 12-month demand
Additions to capitalized computer software for internal use	$ 2.2	$ 3.5	$ 2
Depreciation and amortization, property plant and equipment	$ 52.9	52.7	48.7
Period for revenue recognition for perpetual licenses maintenance	12 months
Maximum period for collection of receivables	5 years
Percentage of likelihood of tax benefit being realized upon effective settlement of audit	50.00%
Advertising expense	$ 7.4	$ 8.4	$ 7.9

Debt (Details)

Debt (Details) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016	Jan. 28, 2016	Oct. 09, 2014
Debt Instrument [Line Items]
Principal	$ 735,000	$ 700,000
Unamortized Discount	(5,631)	(6,507)
Carrying Value	85,000	50,000
Carrying Value	644,369	643,493
Carrying Value	729,369	693,493
Long-term Debt [Member] | Term Loan Due 2019 [Member]
Debt Instrument [Line Items]
Principal	300,000	300,000	$ 300,000
Unamortized Discount	(226)	(434)
Carrying Value	299,774	299,566
Senior Notes [Member] | Senior Notes Due 2024 [Member]
Debt Instrument [Line Items]
Principal	350,000	350,000		$ 350,000
Unamortized Discount	(5,405)	(6,073)		$ (1,400)
Carrying Value	344,595	343,927
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Principal	85,000	50,000
Carrying Value	$ 85,000	$ 50,000

Debt Credit Facility (Details T

Debt Credit Facility (Details Textual) $ in Thousands	12 Months Ended
	Dec. 30, 2017USD ($)	Dec. 31, 2016USD ($)
Line of Credit Facility [Line Items]
Outstanding borrowings under Revolving Credit Facility	$ 85,000	$ 50,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, current borrowing capacity	350,000
Credit facility, additional borrowing capacity available	250,000
Credit facility, maximum borrowing capacity	$ 600,000
Credit facility, maturity date	Jan. 28, 2022
Credit facility, interest rate at period end	2.62%
Outstanding borrowings under Revolving Credit Facility	$ 85,000	$ 50,000
Maximum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, commitment fee percentage	0.30%
Minimum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, commitment fee percentage	0.15%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, covenant, debit to EBITDA ratio	3
Credit facility, covenant, debt to EBITDA ratio after step up triggered by acquisition	3.50
Credit facility, covenant, required business acquisition consideration, minimum	$ 250,000
Revolving Credit Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Credit facility, covenant, leverage ratio	3.25
Revolving Credit Facility [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Credit facility, covenant, leverage ratio	2.75
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, interest rate spread	1.875%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, interest rate spread	1.25%
Base Rate [Member] | Maximum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, interest rate spread	0.875%
Base Rate [Member] | Minimum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, interest rate spread	0.25%

Debt (Details Textual)

Debt (Details Textual) $ in Thousands	Jan. 28, 2016USD ($)	Oct. 09, 2014USD ($)	Dec. 30, 2017USD ($)	Dec. 31, 2016USD ($)
Debt Instrument [Line Items]
Unamortized discount			$ 5,631	$ 6,507
Long-term Debt [Member] | Term Loan Due 2019 [Member]
Debt Instrument [Line Items]
Aggregate principal amount issued	$ 300,000		$ 300,000	300,000
Debt instrument, term	3 years
Debt Instrument, Maturity Date			Jan. 28, 2019
Debt instrument, covenant, debt to EBITDA ratio			3
Debt Instrument, Covenant, Debt to EBITDA Ratio after step up triggered by acquisition			3.50
Debt Instrument, Covenant, Required Business Acquisition Consideration, Minimum			$ 250,000
Unamortized discount			226	434
Senior Notes [Member] | Senior Notes Due 2024 [Member]
Debt Instrument [Line Items]
Aggregate principal amount issued		$ 350,000	350,000	350,000
Stated interest rate of Senior Notes		4.375%
Proceeds from Senior Notes, net		$ 342,400
Unamortized discount		1,400	$ 5,405	$ 6,073
Debt issuance costs		$ 6,200
London Interbank Offered Rate (LIBOR) [Member] | Long-term Debt [Member] | Term Loan Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, interest rate at period end			2.63%
Minimum [Member] | Long-term Debt [Member] | Term Loan Due 2019 [Member]
Debt Instrument [Line Items]
Pro forma leverage ratio			2.75
Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member] | Long-term Debt [Member] | Term Loan Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, interest rate spread			1.125%
Maximum [Member] | Long-term Debt [Member] | Term Loan Due 2019 [Member]
Debt Instrument [Line Items]
Pro forma leverage ratio			3.25
Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member] | Long-term Debt [Member] | Term Loan Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, interest rate spread			1.875%

Cash, Cash Equivalents and In53

Cash, Cash Equivalents and Investments (Details 1) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Cash, Cash Equivalents and Investments [Abstract]
Cash and cash equivalents	$ 688,087	$ 465,232	$ 616,686	$ 932,161
Short-term investments	4,455	3,057
Cash, cash equivalents and short-term investments	$ 692,542	$ 468,289

Cash, Cash Equivalents and In54

Cash, Cash Equivalents and Investments (Details 2) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Classified as cash and cash equivalents
Cash	$ 184,153	$ 227,508
Money market funds	503,934	237,724
Total cash and cash equivalents	$ 688,087	$ 465,232	$ 616,686	$ 932,161

Cash, Cash Equivalents and In55

Cash, Cash Equivalents and Investments (Details 3) - Marketable equity securities [Member] - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Short-term investments
Amortized Cost	$ 1,817	$ 2,131
Gross Unrealized Gains	2,638	926
Gross Unrealized Losses	0	0
Fair Value	$ 4,455	$ 3,057

Cash, Cash Equivalents and In56

Cash, Cash Equivalents and Investments (Details 4) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Cash, Cash Equivalents and Investments [Abstract]
Cost method	$ 532	$ 532
Equity method	2,460	2,634
Total non-marketable investments	$ 2,992	$ 3,166

Receivables, net (Details)

Receivables, net (Details) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Current and long-term receivables balances
Accounts receivable	$ 119,325	$ 85,554
Unbilled accounts receivable	71,101	71,617
Long-term receivables	12,239	12,949
Total receivables	202,665	170,120
Less allowance for doubtful accounts	0	0	$ 0	$ 0
Total receivables, net	$ 202,665	$ 170,120

Receivables, net (Details Textu

Receivables, net (Details Textual) - Customer	Dec. 30, 2017	Dec. 31, 2016
Receivables and Allowances for Doubtful Accounts (Textual) [Abstract]
Number of customers with receivables balance greater than ten percent of total balance	1	0
Percent of receivables attributable to single customer		10.00%

Receivables, Net Receivables, N

Receivables, Net Receivables, Net (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of period	$ 0	$ 0	$ 0
Charged to costs and expenses	2,623	308	126
Uncollectible accounts written off, net	(2,623)	(308)	(126)
Balance at end of period	$ 0	$ 0	$ 0

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
United States	$ 81,619	$ 84,694	$ 47,867
Foreign subsidiaries	233,427	152,459	219,729
Income before provision for income taxes	$ 315,046	$ 237,153	$ 267,596

Income Taxes (Details 1)

Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Current:
Federal	$ (2,193)	$ 4,839	$ (10,265)
State and local	(2,097)	50	(713)
Foreign	35,301	34,047	24,622
Total current	31,011	38,936	13,644
Deferred:
Federal	76,494	(5,291)	(13,165)
State and local	5,571	6,006	1,751
Foreign	(2,131)	(5,584)	(1,734)
Total deferred	79,934	(4,869)	(13,148)
Tax expense allocated to shareholders' equity	0	0	14,683
Total provision for income taxes	$ 110,945	$ 34,067	$ 15,179

Income Taxes (Details 2)

Income Taxes (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017		Dec. 31, 2016	Jan. 02, 2016
Summary of income tax reconciliation
Provision computed at federal statutory income tax rate	$ 110,266		$ 83,003	$ 93,659
State and local income tax, net of federal tax effect	5,867		5,534	3,621
Foreign income tax rate differential	(65,296)		(36,098)	(56,873)
Effective income tax rate reconciliation, change in enacted tax rate	96,798	[1]	0	0
Stock-based compensation	(24,455)		(13,132)	2,687
Change in deferred tax valuation allowance	4,689		1,243	(11,066)
Tax credits	(26,789)		(39,765)	(19,243)
Repatriation of foreign earnings	0		25,145	50
Tax effects of intra-entity transfer of assets	(8,450)		(7,661)	(7,928)
Domestic production activity deduction	(2,474)		(2,826)	0
Withholding taxes	11,225		9,870	5,119
Tax settlements, foreign	3,086		5,620	0
Increase in unrecognized tax benefits not included in tax settlements	4,054		614	3,530
Other	2,424		2,520	1,623
Total provision for income taxes	$ 110,945		$ 34,067	$ 15,179
Effective tax rate	35.00%		14.00%	6.00%
Remeasurement Of Deferred Tax Assets and Liabilities [Member]
Summary of income tax reconciliation
Effective income tax rate reconciliation, change in enacted tax rate	$ 25,200
Transaction Tax On Repatriation Of Foreign Earnings [Member]
Summary of income tax reconciliation
Effective income tax rate reconciliation, change in enacted tax rate	$ 67,200
[1]	The provisional amount related to the remeasurement of U.S. deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future was $25.2 million. The provisional amount related to the one-time transition tax on the mandatory deemed repatriation of foreign earnings was $67.2 million.

Income Taxes (Details 3)

Income Taxes (Details 3) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Deferred Tax Assets:
Tax credit carryforwards	$ 164,687	$ 180,999
Reserves and accruals	42,357	62,438
Intangible assets	13,112	23,335
Capitalized research and development expense for income tax purposes	10,621	19,093
Operating loss carryforwards	20,650	23,175
Deferred income	12,178	14,842
Capital loss carryforwards	20,266	20,580
Stock-based compensation costs	15,782	20,087
Depreciation and amortization	7,665	12,202
Investments	3,201	6,442
Prepaid expenses	0	26,526
Total deferred tax assets	310,519	409,719
Valuation allowance	(95,491)	(92,920)
Net deferred tax assets	215,028	316,799
Deferred Tax Liabilities:
Intangible assets	(36,683)	(35,651)
Undistributed foreign earnings	(23,563)	(24,529)
Other	(2,730)	(119)
Total deferred tax liabilities	(62,976)	(60,299)
Total net deferred tax assets	$ 152,052	$ 256,500

Income Taxes (Details 4)

Income Taxes (Details 4) $ in Thousands	Dec. 30, 2017USD ($)
United States federal [Member]
Summary of operating loss carryforward
Operating loss carry forwards	$ 13,638
California State [Member]
Summary of operating loss carryforward
Operating loss carry forwards	198,173
States other than California [Member]
Summary of operating loss carryforward
Operating loss carry forwards	3,081
Foreign Tax Authority [Member]
Summary of operating loss carryforward
Operating loss carry forwards	$ 866

Income Taxes (Details 5)

Income Taxes (Details 5) $ in Thousands	Dec. 30, 2017USD ($)
United States federal [Member]
Summary of tax credit carryforwards
Tax credit carryforwards	$ 87,746	[1]
California State [Member]
Summary of tax credit carryforwards
Tax credit carryforwards	52,628
States other than California [Member]
Summary of tax credit carryforwards
Tax credit carryforwards	9,153
Foreign Jurisdiction [Member]
Summary of tax credit carryforwards
Tax credit carryforwards	$ 15,160
[1]	Certain of Cadence’s foreign tax credits have yet to be realized and as a result do not yet have an expiration period.

Income Taxes (Details 6)

Income Taxes (Details 6) - USD ($) $ in Thousands		12 Months Ended
		Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Unrecognized Tax Benefits
Unrecognized tax benefits at the beginning of the fiscal year		$ 98,540	$ 87,820	$ 97,224
Gross amount of the decreases in unrecognized tax benefits of tax positions taken during a prior year	[1]		(155)	(7,331)
Gross amount of the increases in unrecognized tax benefits as a result of tax positions taken during the current year	[1]	688
Gross amount of the increases in unrecognized tax benefits as a result of tax positions taken during the current year		13,141	11,342	7,513
Amount of decreases in unrecognized tax benefits relating to settlements with taxing authorities, including the utilization of tax attributes		0	0	(9,571)
Reductions to unrecognized tax benefits resulting from the lapse of the applicable statute of limitations		(3,028)	(149)	(119)
Increase resulting from foreign currency translation		(838)		(104)
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation			(318)
Unrecognized tax benefits at the end of the fiscal year		110,179	98,540	87,820
Total amounts of unrecognized tax benefits that, if upon resolution of the uncertain tax positions would reduce Cadence's effective tax rate		63,108	56,248	48,335
Interest and penalties recognized in Income Statements
Interest		1,865	1,166	110
Penalties		218	3	$ (127)
Interest and penalties recognized in Balance Sheets
Interest		2,511	1,332
Penalties		$ 151	$ 265
[1]	Includes unrecognized tax benefits of tax positions recorded in connection with acquisitions

Income Taxes (Details Textual)

Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Additional Income Taxes (Textual) [Abstract]
United States statutory federal income tax rate		35.00%
Excess tax benefits recognized in the provision for income taxes resulting form the adoption of new accounting standard		$ 32,000	$ 17,200
Net deferred tax assets		$ 215,028	316,799
Percent of revenue recurring in nature, over multiple years		90.00%
Valuation allowance		$ (95,491)	(92,920)
Amount of decreases in unrecognized tax benefits relating to settlements with taxing authorities, including the utilization of tax attributes		$ 0	$ 0	$ 9,571
Scenario, Forecast [Member]
Additional Income Taxes (Textual) [Abstract]
United States statutory federal income tax rate	21.00%

Acquisitions (Details Textual)

Acquisitions (Details Textual) $ in Thousands	12 Months Ended
	Dec. 30, 2017USD ($)acquisition	Dec. 31, 2016USD ($)	Jan. 02, 2016USD ($)
Business Acquisition [Line Items]
Cash paid in business combinations and asset acquisitions, net of cash acquired	$ 143,249	$ 41,627	$ 0
Goodwill resulting from acquisitions	90,218	23,579
Transaction costs associated with acquisitions	$ 600	$ 1,100	$ 700
2017 Acquisitions [Member]
Business Acquisition [Line Items]
Number of businesses acquired	2
Cash paid in business combinations and asset acquisitions, net of cash acquired	$ 142,800
Cash acquired	4,200
Technology-based intangible assets	76,400
Goodwill resulting from acquisitions	90,200
Net other identifiable assets and liabilities resulting from acquisitions	$ (19,600)
Weighted average useful life of finite-lived intangible assets acquired	5 years 7 months 6 days
2016 Acquisitions [Member]
Business Acquisition [Line Items]
Number of businesses acquired | acquisition	2
Cash paid in business combinations and asset acquisitions, net of cash acquired	$ 42,400
Cash acquired	1,800
Finite-lived intangible assets resulting from acquisitions	23,200
Goodwill resulting from acquisitions	23,600
Net other identifiable assets and liabilities resulting from acquisitions	$ (2,600)
Trust For Benefit Of Children of Chief Executive Officer [Member] | nusemi inc [Member]
Business Acquisition [Line Items]
Related party ownership percentage in acquired company	3.00%
Trust For Benefit Of Children of Chief Executive Officer [Member] | Rocketick Technologies [Member]
Business Acquisition [Line Items]
Related party ownership percentage in acquired company	2.00%
In-Process Technology [Member] | 2017 Acquisitions [Member]
Business Acquisition [Line Items]
In-process technology	$ 71,500

Goodwill and Acquired Intangi69

Goodwill and Acquired Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Changes in the carrying amount of goodwill
Balance at beginning of period	$ 572,764	$ 551,772
Goodwill resulting from acquisitions	90,218	23,579
Effect of foreign currency translation	3,027	(2,587)
Balance at end of period	$ 666,009	$ 572,764

Goodwill and Acquired Intangi70

Goodwill and Acquired Intangibles (Details 1) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	$ 504,791
Accumulated amortization	(297,456)	$ (267,723)
Acquired intangibles, net	207,335
In-process technology	71,500
Intangible Assets, Gross (Excluding Goodwill)	576,291	526,537
Intangible Assets, Net (Excluding Goodwill)	278,835	258,814
Existing technology [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	342,810	342,108
Accumulated amortization	(199,529)	(160,178)
Acquired intangibles, net	143,281	181,930
Agreements and relationships [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	151,063	174,623
Accumulated amortization	(90,675)	(100,778)
Acquired intangibles, net	60,388	73,845
Tradenames, trademarks and patents [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	10,918	9,806
Accumulated amortization	(7,252)	(6,767)
Acquired intangibles, net	$ 3,666	$ 3,039

Goodwill and Acquired Intangi71

Goodwill and Acquired Intangibles (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Amortization of acquired intangibles
Cost of product and maintenance	$ 41,781	$ 42,387	$ 40,532
Amortization of acquired intangibles	14,716	18,095	23,716
Total amortization of acquired intangibles	$ 56,497	$ 60,482	$ 64,248

Goodwill and Acquired Intangi72

Goodwill and Acquired Intangibles (Details 3) $ in Thousands	Dec. 30, 2017USD ($)
Estimated amortization expense
2,018	$ 53,346
2,019	46,239
2,020	40,621
2,021	36,115
2,022	17,810
Thereafter	13,204
Acquired intangibles, net	$ 207,335

Stock Repurchase Programs (Deta

Stock Repurchase Programs (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Equity [Abstract]
Treasury stock, shares repurchased	2,495	40,493	16,255
Treasury stock, total cost of repurchased shares	$ 100,025	$ 960,289	$ 333,189

Stock Repurchase Programs Stock

Stock Repurchase Programs Stock Repurchase Programs (Details Textual) - USD ($) $ in Millions	Dec. 30, 2017	Jan. 31, 2017
Equity [Abstract]
Authorized amount for share repurchases		$ 525
Remaining authorization for share repurchases	$ 425

Stock Compensation Plans and 75

Stock Compensation Plans and Stock Based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 130,023	$ 109,217	$ 92,341
Income tax benefit	36,664	30,980	24,294
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	5,417	5,649	7,903
Restricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	117,797	96,989	78,615
Employee stock purchase plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 6,809	$ 6,579	$ 5,823

Stock Compensation Plans and 76

Stock Compensation Plans and Stock Based Compensation (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Stock based compensation expense and allocation by cost
Stock-based compensation	$ 130,023	$ 109,217	$ 92,341
Cost of product and maintenance [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	2,218	1,995	2,436
Cost of services [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	3,232	2,911	3,561
Marketing and sales [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	26,838	22,700	21,654
Research and development [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	77,222	64,061	49,755
General and administrative [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	$ 20,513	$ 17,550	$ 14,935

Stock Compensation Plans and 77

Stock Compensation Plans and Stock Based Compensation (Details 2) - Stock options [Member] - $ / shares	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected volatility	21.20%	31.50%	26.80%
Risk-free interest rate	2.01%	1.21%	1.61%
Expected term (in years)	4 years 9 months	4 years 9 months 29 days	5 years
Weighted-average fair value of options granted	$ 6.86	$ 5.84	$ 4.60

Stock Compensation Plans and 78

Stock Compensation Plans and Stock Based Compensation (Details 3) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 30, 2017USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding beginning balance | shares	7,117
Granted | shares	820
Exercised | shares	(1,957)
Canceled and forfeited | shares	(197)
Options outstanding ending balance | shares	5,783
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted-Average Exercise Price, Options outstanding beginning balance | $ / shares	$ 13.61
Weighted-Average Exercise Price Granted | $ / shares	30.72
Weighted-Average Exercise Price Exercised | $ / shares	11.37
Weighted-Average Exercise Price Canceled and Forfeited | $ / shares	20.52
Weighted-Average Exercise Price, Options outstanding ending balance | $ / shares	$ 16.56
Summary of company stock option plans
Options vested as of December 30, 2017 | shares	4,104
Weighted Average Exercise Price, Options vested as of December 30, 2017 | $ / shares	$ 13.72
Weighted-Average Remaining Contractual Term, Options outstanding as of December 30, 2017	3 years 9 months 10 days
Weighted-Average Remaining Contractual Term, Options vested as of December 30, 2017	3 years 1 month 27 days
Aggregate Intrinsic Value, Options outstanding as of December 30, 2017 | $	$ 110,114
Aggregate Intrinsic Value, Options vested as of December 30, 2017 | $	$ 89,790

Stock Compensation Plans and 79

Stock Compensation Plans and Stock Based Compensation (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Intrinsic Value And Cash Received From Stock Options Exercised
Intrinsic value of options exercised	$ 45,643	$ 44,835	$ 67,363
Cash received from options exercised	$ 22,255	$ 30,984	$ 52,261

Stock Compensation Plans and 80

Stock Compensation Plans and Stock Based Compensation (Details 5) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 130,023	$ 109,217	$ 92,341
Stock-based compensation expense related to performance-based grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 8,224	$ 9,195	$ 5,544

Stock Compensation Plans and 81

Stock Compensation Plans and Stock Based Compensation (Details 6) - Restricted stock [Member] $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 30, 2017USD ($)$ / sharesshares
Summary of changes in restricted stock awards outstanding under Cadence's equity incentive plans
Unvested shares beginning balance | shares	12,082
Granted | shares	5,909
Vested | shares	(5,121)
Forfeited | shares	(902)
Unvested shares ending balance | shares	11,968
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Unvested shares beginning balance, Weighted-Average Grant Date Fair Value | $ / shares	$ 20.40
Granted, Weighted-Average Grant date Fair Value | $ / shares	34.48
Vested, Weighted-Average Grant Date Fair Value | $ / shares	20.75
Forfeited, Weighted-Average Grant Date Fair Value | $ / shares	21.49
Unvested shares beginning balance, Weighted-Average Grant Date Fair Value | $ / shares	$ 27.11
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Unvested shares as of December 30, 2017, Weighted-Average Remaining Vesting Terms	1 year 1 month
Unvested shares as of December 30, 2017, Aggregate Intrinsic Value | $	$ 500,231

Stock Compensation Plans and 82

Stock Compensation Plans and Stock Based Compensation (Details 7) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Restricted stock [Member]
Fair value of restricted stock awards that vested
Fair value of restricted stock realized upon vesting	$ 174,548	$ 113,114	$ 99,564

Stock Compensation Plans and 83

Stock Compensation Plans and Stock Based Compensation (Details 8) - Purchase rights granted [Member] - $ / shares	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Weighted-average grant date fair value of purchase rights granted under ESPP and weighted-average assumptions used in model
Expected volatility	20.40%	24.40%	22.90%
Risk-free interest rate	0.92%	0.43%	0.13%
Expected term (in years)	6 months	6 months	6 months
Weighted-average fair value of options granted	$ 6.64	$ 4.85	$ 4.23

Stock Compensation Plans and 84

Stock Compensation Plans and Stock Based Compensation (Details 9) - Employee stock purchase plans [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Shares of common stock issued under employee stock purchase plan
Cadence shares purchased under the ESPP	1,270	1,471	1,519
Cash received for the purchase of shares under the ESPP	$ 26,709	$ 24,450	$ 22,449
Weighted-average purchase price per share	$ 21.04	$ 16.62	$ 14.78

Stock Compensation Plans and 85

Stock Compensation Plans and Stock Based Compensation (Details 10) shares in Thousands	Dec. 30, 2017shares
Common stock reserved for future issuance
Common stock reserved for future issuance	23,881
Employee equity incentive plans [Member]
Common stock reserved for future issuance
Common stock reserved for future issuance	18,663	[1]
Employee stock purchase plans [Member]
Common stock reserved for future issuance
Common stock reserved for future issuance	3,920
Directors stock option plans [Member]
Common stock reserved for future issuance
Common stock reserved for future issuance	1,298	[1]
[1]	Includes shares reserved for: (i) issuance upon exercise of future option grants, (ii) issuance upon vesting of future restricted stock grants, (iii) outstanding but unexercised options to purchase common stock, or (iv) unvested restricted stock units.

Stock Compensation Plans and 86

Stock Compensation Plans and Stock Based Compensation (Details Textual) - USD ($) shares in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
One Thousand Nine Hundred Ninety Five Directors Stock Options Plan [Member]
Stock Compensation Plans (Textual) [Abstract]
Number of shares available for issuance under equity incentive plan	600
Term of options granted under Directors' Plan	10 years
Employee stock purchase plans [Member]
Stock Compensation Plans (Textual) [Abstract]
Percentage of lower of fair market value at beginning or end of applicable offering period used for calculating price of common stock to be purchased by employees	85.00%
Purchase period for common stock	6 months
Number of shares available for issuance under Employee Stock Purchase Plan	3,900
Employee Stock Purchase Plan with Offering Period Commencing on February 1, 2014 [Member] [Member]
Stock Compensation Plans (Textual) [Abstract]
Maximum percentage of annual base earnings plus bonuses and commissions for which common stock can be purchased by employees	7.00%
Maximum amount for which common stock can be purchased by employees in any calendar year	$ 9,411.76
2014 Omnibus Equity Incentive Plan [Member]
Stock Compensation Plans (Textual) [Abstract]
Additional shares authorized and available for issuance under equity incentive plan	6,500
Number of shares available for issuance under equity incentive plan	11,200
Expiration period from date of grant for options granted	7 years
Stock options [Member]
Stock Compensation Plans (Textual) [Abstract]
Total unrecognized compensation expense, net of estimates forfeitures	$ 9,500,000
Weighted-average vesting period over which unrecognized compensation expense will be recognized	2 years 3 months
Stock options [Member] | 2014 Omnibus Equity Incentive Plan [Member] | Maximum [Member]
Stock Compensation Plans (Textual) [Abstract]
Minimum vesting period	4 years
Stock options [Member] | 2014 Omnibus Equity Incentive Plan [Member] | Minimum [Member]
Stock Compensation Plans (Textual) [Abstract]
Minimum vesting period	3 years
Employee Stock [Member] | One Thousand Nine Hundred Ninety Five Directors Stock Options Plan [Member]
Stock Compensation Plans (Textual) [Abstract]
Minimum vesting period	1 year
Restricted stock [Member]
Stock Compensation Plans (Textual) [Abstract]
Performance-based stock awards, total granted	11,968	12,082
Total unrecognized compensation expense, net of estimates forfeitures	$ 264,400,000
Weighted-average vesting period over which unrecognized compensation expense will be recognized	2 years 1 month
Restricted stock [Member] | Maximum [Member]
Stock Compensation Plans (Textual) [Abstract]
Minimum vesting period	4 years
Restricted stock [Member] | Minimum [Member]
Stock Compensation Plans (Textual) [Abstract]
Minimum vesting period	3 years
Restricted stock [Member] | One Thousand Nine Hundred Ninety Five Directors Stock Options Plan [Member]
Stock Compensation Plans (Textual) [Abstract]
Minimum vesting period	1 year
Restricted stock [Member] | 2014 Omnibus Equity Incentive Plan [Member] | Maximum [Member]
Stock Compensation Plans (Textual) [Abstract]
Minimum vesting period	4 years
Restricted stock [Member] | 2014 Omnibus Equity Incentive Plan [Member] | Minimum [Member]
Stock Compensation Plans (Textual) [Abstract]
Minimum vesting period	3 years
Performance Based Restricted Stock Grants [Member]
Stock Compensation Plans (Textual) [Abstract]
Performance-based stock awards, total granted	1,530

Restructuring and Other Charg87

Restructuring and Other Charges (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	$ 9,406	$ 40,955	$ 4,511
Restructuring Reserve	13,784	24,460	1,137	$ 6,210
2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	11,900
Restructuring Reserve	11,100
2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges		$ 40,400
Restructuring Reserve, Accrual Adjustment	(2,800)
Restructuring Reserve	2,500
Prior Restructuring Plans [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges			$ 4,200
Restructuring Reserve	$ 200

Restructuring and Other Charg88

Restructuring and Other Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Cadence's Restructuring Plans
Beginning Balance	$ 24,460	$ 1,137	$ 6,210
Restructuring and other charges (credits), net	9,406	40,955	4,511
Restructuring Activities Non Cash Charges Adjustments		(159)	(116)
Cash payments	(20,356)	(17,569)	(9,381)
Effect of foreign currency translation	274	96	(87)
Ending Balance	13,784	24,460	1,137
Severance and Benefits [Member]
Cadence's Restructuring Plans
Beginning Balance	24,402	751	4,462
Restructuring and other charges (credits), net	9,027	40,411	3,636
Restructuring Activities Non Cash Charges Adjustments		0	0
Cash payments	(20,170)	(16,890)	(7,322)
Effect of foreign currency translation	276	130	(25)
Ending Balance	13,535	24,402	751
Excess Facilities [Member]
Cadence's Restructuring Plans
Beginning Balance	58	386	1,267
Restructuring and other charges (credits), net	379	544	1,095
Restructuring Activities Non Cash Charges Adjustments		(159)	(116)
Cash payments	(186)	(679)	(1,798)
Effect of foreign currency translation	(2)	(34)	(62)
Ending Balance	249	58	386
Other [Member]
Cadence's Restructuring Plans
Beginning Balance	0	0	481
Restructuring and other charges (credits), net		0
Restructuring Reserve, Accrual Adjustment	0		(220)
Restructuring Activities Non Cash Charges Adjustments		0	0
Cash payments	0	0	(261)
Effect of foreign currency translation	0	0	0
Ending Balance	$ 0	$ 0	$ 0

Restructuring and Other Charg89

Restructuring and Other Charges (Details 1) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 13,784	$ 24,460	$ 1,137	$ 6,210
Accounts payable and accrued liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	13,619
Other long-term liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 165

Other Income, Net (Details)

Other Income, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Other Income, Net
Interest income	$ 3,879	$ 2,917	$ 2,667
Gains on sale of marketable debt and equity securities, net	520	317	21
Gains on sale of non-marketable equity investments	8,934	2,668	2,348
Gains (losses) on securities in NQDC trust	6,145	1,741	(369)
Gains on foreign exchange	(2,920)	6,879	5,606
Gain on sale of property, plant and equipment	0	923	0
Other income, net	197	477	204
Total other income, net	$ 16,755	$ 15,922	$ 10,477

Net Income Per Share (Details)

Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Earnings Per Share [Abstract]
Net income	$ 204,101	$ 203,086	$ 252,417
Weighted average common shares used to calculate basic net income per share	272,097	284,502	288,018
2015 Warrants	0	0	16,434
Stock-based compensation	8,124	6,754	7,850
Weighted average common shares used to calculate diluted net income per share	280,221	291,256	312,302
Net income per share - basic (in usd per share)	$ 0.75	$ 0.71	$ 0.88
Net income per share - diluted (in usd per share)	$ 0.73	$ 0.70	$ 0.81

Net Income Per Share (Details 1

Net Income Per Share (Details 1) - shares shares in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	532	1,677	1,089
Long-term performance-based awards
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	152	1,069	0
Options to purchase shares of common stock
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	303	581	1,029
Non-vested shares of restricted stock
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	77	27	60

Balance Sheet Components (Detai

Balance Sheet Components (Details) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Inventories:
Raw materials	$ 17,491	$ 26,589
Finished goods	15,718	12,886
Inventories	33,209	39,475
Property, plant and equipment:
Computer equipment and related software	537,144	503,543
Buildings	127,478	126,023
Land	55,840	55,785
Leasehold, building and land improvements	106,173	95,040
Furniture and fixtures	27,590	23,580
Equipment	50,340	44,119
In-process capital assets	5,154	3,478
Total cost	909,719	851,568
Less: Accumulated depreciation and amortization	(658,377)	(612,961)
Property, plant and equipment, net	251,342	238,607	$ 228,599
Other assets:
Deferred income taxes	152,501	256,547
Other long-term assets	77,800	55,193
Other assets	230,301	311,740
Accounts payable and accrued liabilities:
Payroll and payroll-related accruals	164,310	174,936
Accounts payable	4,825	4,367
Income taxes payable - current	3,936	18,382
Accrued operating liabilities	48,030	41,811
Accounts payable and accrued liabilities	$ 221,101	$ 239,496

Commitments and Contingencies94

Commitments and Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Operating Leases, Rent Expense, Net [Abstract]
Rent expense	$ 32,089	$ 28,216	$ 27,406
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating leases, future minimum payments, Current Year	28,090
Operating leases, future minimum payments, due in two years	20,641
Operating leases, future minimum payments, due in three years	12,514
Operating leases, future minimum payments, due in four years	10,013
Operating leases, future minimum payments, due in five years	7,042
Operating leases, future minimum payments, due thereafter	21,721
Operating leases, future minimum payments due	$ 100,021

Commitments and Contingencies95

Commitments and Contingencies (Details Textual) $ in Millions	12 Months Ended
	Dec. 30, 2017USD ($)
Commitments and Contingencies Disclosure [Abstract]
Purchase obligations	$ 31.8
General period of warranty on sales of hardware products	90 days

Fair Value (Details)

Fair Value (Details) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Short-term investments:
Trading securities held in Non-Qualified Deferred Compensation Plan, or NQDC	$ 31,473	$ 26,622
Foreign currency exchange contracts	2,937
Total Assets	542,799	267,403
Liabilities
Foreign currency exchange contracts		2,653
Money market funds [Member]
Assets
Money market funds	503,934	237,724
Marketable equity securities [Member]
Short-term investments:
Available-for-sale securities	4,455	3,057
Fair Value Measurements, Level 1 [Member]
Short-term investments:
Trading securities held in Non-Qualified Deferred Compensation Plan, or NQDC	31,473	26,622
Foreign currency exchange contracts	0
Total Assets	539,862	267,403
Liabilities
Foreign currency exchange contracts		0
Fair Value Measurements, Level 1 [Member] | Money market funds [Member]
Assets
Money market funds	503,934	237,724
Fair Value Measurements, Level 1 [Member] | Marketable equity securities [Member]
Short-term investments:
Available-for-sale securities	4,455	3,057
Fair Value Measurements, Level 2 [Member]
Short-term investments:
Trading securities held in Non-Qualified Deferred Compensation Plan, or NQDC	0	0
Foreign currency exchange contracts	2,937
Total Assets	2,937	0
Liabilities
Foreign currency exchange contracts		2,653
Fair Value Measurements, Level 2 [Member] | Money market funds [Member]
Assets
Money market funds	0	0
Fair Value Measurements, Level 2 [Member] | Marketable equity securities [Member]
Short-term investments:
Available-for-sale securities	0	0
Fair Value Measurements, Level 3 [Member]
Short-term investments:
Trading securities held in Non-Qualified Deferred Compensation Plan, or NQDC	0	0
Foreign currency exchange contracts	0
Total Assets	0	0
Liabilities
Foreign currency exchange contracts		0
Fair Value Measurements, Level 3 [Member] | Money market funds [Member]
Assets
Money market funds	0	0
Fair Value Measurements, Level 3 [Member] | Marketable equity securities [Member]
Short-term investments:
Available-for-sale securities	$ 0	$ 0

Fair Value Fair Value (Details

Fair Value Fair Value (Details Textual) - 2017 Acquisitions [Member] $ in Millions	12 Months Ended
	Dec. 30, 2017USD ($)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Technology-based intangible assets	$ 76.4
Intangible Assets [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Technology-based intangible assets	$ 76.4
Fair Value Inputs, Discount Rate	14.00%

Employee and Director Benefit98

Employee and Director Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Contributions to plan
Contributions to defined contribution plans	$ 26,010	$ 24,185	$ 22,337
Net recognized gains (losses) of trading securities
Trading securities	6,145	1,741	(369)
Defined Benefit Plan, Plan with Benefit Obligation in Excess of Plan Assets [Abstract]
Unfunded projected benefit obligation - defined benefit retirement plans	6,976	6,164	6,131
Expense related to defined benefit plans
Expense related to defined benefit plans	$ 1,214	$ 670	$ 1,359

Other Comprehensive Loss (Detai

Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Accumulated other comprehensive income
Foreign currency translation gain	$ (2,976)	$ (22,370)
Changes in defined benefit plan liabilities	(3,292)	(3,716)
Unrealized holding gains on available-for-sale securities	2,638	926
Total accumulated other comprehensive income	$ (3,630)	$ (25,160)

Other Comprehensive Loss (De100

Other Comprehensive Loss (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Changes in unrealized holding gains or losses on available-for-sale securities
Unrealized holding gains or losses	$ 2,231	$ 770	$ 202
Reclassification of unrealized holding gains or losses to other income, net	(519)	(54)	(33)
Changes in unrealized holding gains or losses	$ 1,712	$ 716	$ 169

Segment Reporting (Details)

Segment Reporting (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Americas:
Total Americas	$ 864,503	$ 863,879	$ 808,379
Total revenue	1,943,032	1,816,083	1,702,091
United States
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, revenue from External Customers attributed to Individual Foreign Countries	829,436	832,583	782,419
Other Americas [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, revenue from External Customers attributed to Individual Foreign Countries	35,067	31,296	25,960
Asia [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, revenue from External Customers attributed to Individual Foreign Countries	526,201	445,500	413,588
Europe, Middle East and Africa [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, revenue from External Customers attributed to Individual Foreign Countries	385,705	346,701	316,684
Japan [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic Areas, revenue from External Customers attributed to Individual Foreign Countries	$ 166,623	$ 160,003	$ 163,440

Segment Reporting (Details 1)

Segment Reporting (Details 1) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Americas:
Total Americas	$ 199,355	$ 194,507	$ 190,052
Total long-lived assets	251,342	238,607	228,599
United States
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	198,744	193,750	189,665
Other Americas [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	611	757	387
Asia [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	37,678	30,564	24,767
Europe, Middle East and Africa [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	13,615	12,692	12,832
Japan [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	$ 694	$ 844	$ 948