Cadence Design Systems (CDNS) 10-K 24 Feb 20 2019 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 28, 2019	Feb. 01, 2020	Jun. 29, 2019
Cover page.
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 28, 2019
Document Transition Report	false
Entity File Number	000-15867
Entity Registrant Name	CADENCE DESIGN SYSTEMS INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	00-0000000
Entity Address, Address Line One	2655 Seely Avenue, Building 5,
Entity Address, City or Town	San Jose,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95134
City Area Code	(408)
Local Phone Number	943-1234
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	CDNS
Security Exchange Name	NASDAQ
Entity Central Index Key	0000813672
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 19,837,633,930
Entity Common Stock, Shares Outstanding		280,168,000
Current Fiscal Year End Date	--12-28

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Current assets:
Cash and cash equivalents	$ 705,210	$ 533,298
Receivables, net	304,546	297,082
Inventories	55,802	28,162
Prepaid expenses and other	103,785	92,550
Total current assets	1,169,343	951,092
Property, plant and equipment, net	275,855	252,630
Goodwill	661,856	662,272
Acquired intangibles, net	172,375	225,457
Deferred taxes	732,367	154,894
Other assets	345,429	222,309
Total assets	3,357,225	2,468,654
Current liabilities:
Revolving credit facility	0	100,000
Accounts payable and accrued liabilities	316,908	256,526
Current portion of deferred revenue	355,483	352,456
Total current liabilities	672,391	708,982
Long-term liabilities:
Long-term portion of deferred revenue	73,400	48,718
Long-term debt	346,019	345,291
Other long-term liabilities	162,521	77,262
Total long-term liabilities	581,940	471,271
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: 279,855 and 280,015, respectively	2,046,237	1,936,124
Treasury stock, at cost; 49,304 shares and 49,144 shares, respectively	(1,668,105)	(1,395,652)
Retained earnings	1,761,688	772,709
Accumulated other comprehensive loss	(36,926)	(24,780)
Total stockholders' equity	2,102,894	1,288,401
Total liabilities and stockholders' equity	$ 3,357,225	$ 2,468,654

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 28, 2019	Dec. 29, 2018
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)	279,855,000	280,015,000
Common stock shares outstanding (in shares)	279,855,000	280,015,000
Treasury stock (in shares)	49,304,000	49,144,000

Consolidated Income Statements

Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Revenue:
Total revenue	$ 2,336,319	$ 2,138,022	$ 1,943,032
Costs and expenses:
Marketing and sales	481,673	439,669	419,161
Research and development	935,938	884,816	804,223
General and administrative	139,806	133,406	134,181
Amortization of acquired intangibles	12,128	14,086	14,716
Restructuring and other charges	8,621	11,089	9,406
Total costs and expenses	1,844,523	1,741,813	1,619,077
Income from operations	491,796	396,209	323,955
Interest expense	(18,829)	(23,139)	(25,664)
Other income, net	6,001	3,320	16,755
Income before provision (benefit) for income taxes	478,968	376,390	315,046
Provision (benefit) for income taxes	(510,011)	30,613	110,945
Net income	$ 988,979	$ 345,777	$ 204,101
Net income per share - basic (in usd per share)	$ 3.62	$ 1.26	$ 0.75
Net income per share - diluted (in usd per share)	$ 3.53	$ 1.23	$ 0.73
Weighted average common shares outstanding - basic (shares)	273,239	273,729	272,097
Weighted average common shares outstanding - diluted (shares)	280,515	281,144	280,221
Product and maintenance
Revenue:
Total revenue	$ 2,204,615	$ 1,997,887	$ 1,813,987
Costs and expenses:
Cost of sales	189,146	173,011	156,676
Services
Revenue:
Total revenue	131,704	140,135	129,045
Costs and expenses:
Cost of sales	$ 77,211	$ 85,736	$ 80,714

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 988,979	$ 345,777	$ 204,101
Other comprehensive income (loss), net of tax effects:
Foreign currency translation adjustments	(8,642)	(17,885)	19,394
Changes in unrealized holding gains or losses on available-for-sale securities, net of reclassification adjustments for realized gains and losses	0	0	1,712
Changes in defined benefit plan liabilities	(3,504)	(627)	424
Total other comprehensive income (loss), net of tax effects	(12,146)	(18,512)	21,530
Comprehensive income	$ 976,833	$ 327,265	$ 225,631

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 Dec. 31, 2016	$ 741,770		$ 1,820,081	$ (1,190,053)	$ 136,902	$ (25,160)
Beginning balance, shares at Dec. 31, 2016		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, value	48,964		(111,982)	160,946
Stock received for payment of employee taxes on vesting of restricted stock, shares		(1,442)
Stock received for payment of employee taxes on vesting of restricted stock, value	(57,161)		(8,172)	(48,989)
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment	83,291				85,929	(2,638)
Net income	345,777				345,777
Other comprehensive loss, net of taxes	$ (18,512)					(18,512)
Purchase of treasury stock, shares	(5,934)	(5,934)
Purchase of treasury stock	$ (250,059)			(250,059)
Issuance of common stock and reissuance of treasury stock under equity incentive plans, net of forfeitures, shares		5,274
Issuance of common stock and reissuance of treasury stock under equity incentive plans, net of forfeitures, value	40,908		(50,570)	91,478
Stock received for payment of employee taxes on vesting of restricted stock, shares		(1,392)
Stock received for payment of employee taxes on vesting of restricted stock, value	(69,921)		(10,971)	(58,950)
Stock-based compensation expense	167,715		167,715
Ending balance at Dec. 29, 2018	$ 1,288,401		1,936,124	(1,395,652)	772,709	(24,780)
Ending balance, shares at Dec. 29, 2018	280,015	280,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 988,979				988,979
Other comprehensive loss, net of taxes	$ (12,146)					(12,146)
Purchase of treasury stock, shares	(4,841)	(4,841)
Purchase of treasury stock	$ (306,148)			(306,148)
Issuance of common stock and reissuance of treasury stock under equity incentive plans, net of forfeitures, shares		5,923
Issuance of common stock and reissuance of treasury stock under equity incentive plans, net of forfeitures, value	52,841		(57,763)	110,604
Stock received for payment of employee taxes on vesting of restricted stock, shares		(1,242)
Stock received for payment of employee taxes on vesting of restricted stock, value	(90,580)		(13,671)	(76,909)
Stock-based compensation expense	181,547		181,547
Ending balance at Dec. 28, 2019	$ 2,102,894		$ 2,046,237	$ (1,668,105)	$ 1,761,688	$ (36,926)
Ending balance, shares at Dec. 28, 2019	279,855	279,855

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Statement of Cash Flows [Abstract]
Cash and cash equivalents at beginning of year	$ 533,298	$ 688,087	$ 465,232
Cash flows from operating activities:
Net income	988,979	345,777	204,101
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	122,789	118,721	115,524
Amortization of debt discount and fees	1,001	1,196	1,211
Stock-based compensation	181,547	167,715	130,023
(Gain) loss on investments, net	4,090	(2,732)	(9,454)
Deferred income taxes	(576,738)	(11,676)	79,934
Provisions for losses on receivables	632	5,102	2,623
ROU asset amortization and change in operating lease liabilities	562	0	0
Other non-cash items	428	2,607	653
Changes in operating assets and liabilities, net of effect of acquired businesses:
Receivables	(4,718)	(87,083)	(31,032)
Inventories	(33,024)	752	5,034
Prepaid expenses and other	(11,031)	(19,622)	(25,793)
Other assets	(8,011)	(14,606)	(26,751)
Accounts payable and accrued liabilities	33,915	1,553	(25,987)
Deferred revenue	27,498	100,696	33,614
Other long-term liabilities	1,681	(3,649)	17,040
Net cash provided by operating activities	729,600	604,751	470,740
Cash flows from investing activities:
Proceeds from the sale of marketable investments	0	0	833
Purchases of non-marketable investments	(33,717)	(115,839)	0
Proceeds from the sale of non-marketable investments	2,952	3,497	9,108
Purchases of property, plant and equipment	(74,605)	(61,503)	(57,901)
Cash paid in business combinations and asset acquisitions, net of cash acquired	(338)	0	(143,249)
Net cash used for investing activities	(105,708)	(173,845)	(191,209)
Cash flows from financing activities:
Proceeds from revolving credit facility	150,000	100,000	135,000
Payment on revolving credit facility	(250,000)	(85,000)	(100,000)
Principal payments on term loan	0	(300,000)	0
Payment of debt issuance costs	0	0	(793)
Proceeds from issuance of common stock	52,842	40,908	48,965
Stock received for payment of employee taxes on vesting of restricted stock	(90,580)	(69,921)	(57,161)
Payments for repurchases of common stock	(306,148)	(250,059)	(100,025)
Change in book overdraft	0	(3,867)	3,867
Net cash used for financing activities	(443,886)	(567,939)	(70,147)
Effect of exchange rate changes on cash and cash equivalents	(8,094)	(17,756)	13,471
Increase (decrease) in cash and cash equivalents	171,912	(154,789)	222,855
Cash and cash equivalents at end of year	705,210	533,298	688,087
Supplemental cash flow information:
Cash paid for interest	17,842	23,018	24,160
Cash paid for income taxes, net	$ 41,946	$ 68,040	$ 59,072

Business Overview

Business Overview	12 Months Ended
	Dec. 28, 2019
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 devices and systems, systems-on-chips (“SoCs”) integrated circuits (“ICs”) 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 software, hardware, services and reusable IC design blocks, which are commonly referred to as intellectual property (“IP”). Cadence also provides maintenance for its software, hardware, and IP product offerings.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 28, 2019
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. Cadence’s fiscal years are 52- or 53-week periods ending on the Saturday closest to December 31. Fiscal 2019 , 2018 and 2017 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. Comparability Prior period balances for deferred tax assets in Cadence’s consolidated balance sheets have been reclassified to conform to the current period presentation. Effective the first day of fiscal 2019, Cadence adopted multiple new accounting standards. Prior periods were not retrospectively restated, so the consolidated balance sheet as of December 28, 2019 was prepared using accounting standards that were different than those in effect as of December 29, 2018. Therefore, the consolidated balance sheets as of December 28, 2019 and December 29, 2018 are not directly comparable. Cadence also adopted multiple new accounting standards on the first day of fiscal 2018, including standards related to revenue recognition and accounting for income taxes. Prior periods were not retrospectively restated, so the consolidated balance sheets as of December 28, 2019 and December 29, 2018, are not directly comparable to the consolidated balance sheet as of December 30, 2017, nor are the results of operations for fiscal 2019 and fiscal 2018 directly comparable to the results of operations for fiscal 2017. Recently Adopted Accounting Standards Leases In February 2016, the Financial Accounting Standards Board (“FASB”) issued accounting standards update (“ASU”) 2016-02, “Leases (Topic 842)” (“Topic 842”), which requires the recognition of right-of-use (“ROU”) assets and lease liabilities on the balance sheet. The most prominent of the changes in the standard is the recognition of ROU assets and lease liabilities by lessees for those leases classified as operating leases. Cadence adopted the new standard on December 30, 2018, the first day of fiscal 2019, and used the modified retrospective approach with the effective date as the date of initial application. Consequently, prior period balances and disclosures have not been restated. Cadence elected certain practical expedients, which among other things, allowed it to carry forward prior conclusions about lease identification and classification. Adoption of the standard resulted in the balance sheet recognition of additional lease assets and lease liabilities of approximately $80 million ; however, the adoption of the standard did not have an impact on Cadence’s beginning retained earnings, results from operations or cash flows. Additionally, the new standard did not have a material impact on the consolidated financial statements for arrangements in which Cadence is the lessor. For additional information regarding Cadence’s leases, see Note 7 in the notes to consolidated financial statements. Income Tax Effects within Accumulated Other Comprehensive income In February 2018, the FASB issued ASU 2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income,” which allows a reclassification of the income tax effects of the U.S. Tax Cuts and Jobs Act (the “Tax Act”) on items within accumulated other comprehensive income to retained earnings. This standard became effective for Cadence on December 30, 2018, the first day of fiscal 2019. The adoption of this standard did not have a material impact on Cadence’s consolidated financial 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. 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, accounts receivable, investments and forward contracts. Credit exposure related to Cadence’s foreign currency forward contracts is limited to the realized and unrealized gains on these contracts. Cash and Cash Equivalents 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. 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 and Cadence has an unconditional right to the payment. 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 general and administrative expenses. Inventories Inventories are stated at the lower of cost or net realizable 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 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 $2.4 million , $3.6 million , and $2.2 million during fiscal 2019 , 2018 and 2017 , respectively. Cadence recorded depreciation and amortization expense of $63.3 million , $60.4 million and $52.9 million during fiscal 2019 , 2018 and 2017 , 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 2019 , 2018 and 2017 were not material. Deferred Sales Commissions Cadence records an asset for the incremental costs of obtaining a contract with a customer, including direct sales commissions that are earned upon execution of the contract. Cadence uses the portfolio method to recognize the amortization expense related to these capitalized costs related to initial contracts and renewals and such expense is recognized over a period associated with the revenue of the related portfolio, which is generally two to three years for Cadence’s software arrangements and upon delivery for its hardware and IP arrangements. Incremental costs related to initial contracts and renewals are amortized over the period of the arrangement in each case because Cadence pays the same commission rate for both new contracts and renewals. Deferred sales commissions are tested for impairment on an ongoing basis when events or changes in circumstances indicate that the carrying amount may not be recoverable. An impairment is recognized to the extent that the amount of deferred sales commission exceeds the remaining expected gross margin (remaining revenue less remaining direct costs) on the goods and services to which the deferred sales commission relates. Total capitalized costs were $31.6 million and $31.2 million as of December 28, 2019 , and December 29, 2018 , respectively, and are included in other assets in Cadence’s consolidated balance sheet. Amortization of these assets was $29.4 million and $26.5 million during fiscal 2019 and 2018 , respectively, and is included in sales and marketing expense in Cadence’s consolidated income statement. 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 years 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. Leases Lessee Considerations Cadence has operating leases primarily consisting of facilities with remaining lease terms of approximately one year to eleven years . Cadence has options to terminate many of its leases early. The lease term represents the period up to the early termination date unless it is reasonably certain that Cadence will not exercise the early termination option. For certain leases, Cadence has options to extend the lease term for additional periods ranging from one year to ten years . These renewal options are not considered in the remaining lease term unless it is reasonably certain that Cadence will exercise such options. At inception of a contract, Cadence determines an arrangement contains a lease if the arrangement conveys the right to use an identified asset and Cadence obtains substantially all of the economic benefits from the asset and has the ability to direct the use of the asset. Leases with an initial term of twelve months or less are not recorded on the balance sheet. For lease agreements entered into or reassessed after the adoption of Topic 842, Cadence combines the lease and non-lease components in determining the lease liabilities and ROU assets. Non-lease components primarily include common-area maintenance and other management fees. Operating lease expense is generally recognized evenly over the term of the lease. Payments under Cadence's lease agreements are primarily fixed; however, certain agreements contain rental payments that are adjusted periodically based on changes in consumer price and other indices. Changes to payments resulting from changes in indices are expensed as incurred and not included in the measurement of lease liabilities and ROU assets. Cadence’s lease agreements do not provide an implicit borrowing rate, therefore an internal incremental borrowing rate is determined based on information available at lease commencement date for purposes of determining the present value of lease payments. The incremental borrowing rate represents a comparable rate to borrow on a collateralized basis over a similar term and in the economic environment where the leased asset is located. Cadence used the incremental borrowing rate on the effective date for all leases that commenced prior to that date. Lessor Considerations Although most of Cadence’s revenue from its hardware business comes from sales of hardware, Cadence also leases its hardware products to some customers. Cadence determines the existence of a lease when the customer controls the use of the identified hardware for a period of time defined in the lease agreement. Cadence’s leases range in duration up to three years with payments generally collected in equal quarterly installments. Cadence’s leases do not include termination rights or variable pricing and typically do not include purchase rights at the end of the lease. Short-term leases are usually less than two years and are classified as operating leases with revenue recognized and depreciation expensed on a straight-line basis over the term of the lease. Long-term leases are typically for three years and are classified as sales-type leases with revenue and cost of sales recognized upon delivery. Cadence’s operating leases and sales-type leases contain both lease and non-lease components. Because the pattern of revenue recognition is the same for both the lease and non-lease components in Cadence’s operating leases, Cadence has elected the practical expedient to not separate lease and related non-lease components and accounts for both components under Topic 842. Cadence allocates value to the lease and non-lease components in its sales-type leases using standalone selling prices (“SSPs”) similar to those used under ASU 2014-09, “Revenue from Contracts with Customers (Topic 606),” the current accounting standard governing revenue recognition. When Cadence leases its hardware in the same arrangement as software or IP, Cadence allocates value to each performance obligation using SSPs. Investments in Equity Securities Cadence’s investments in marketable equity securities are carried at fair value as a component of prepaid expenses and other in the consolidated balance sheets. Cadence records realized and unrealized holding gains or losses as part of other income, net in the consolidated income statements. 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 the measurement alternative when the fair value of the investment is not readily determinable and Cadence does not have the ability to exercise significant influence or the equity method of accounting when it is determined that Cadence has the ability to exercise significant influence. For investments accounted for using the equity method of accounting, Cadence records its proportionate share of the investee’s income or loss, net of the effects of any basis differences, to other income, net on a one-quarter lag in Cadence’s consolidated income statements. Cadence reviews its non-marketable investments on a regular basis to determine whether its 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. 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. 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 carried at fair value, with the unrealized gains and losses recognized in the consolidated income statements as other income, net. These securities are classified in other assets in the consolidated balance sheets because they 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. 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 in the consolidated statements of stockholders’ equity. There were no losses recorded as a component of retained earnings by Cadence on the reissuance of treasury stock during fiscal 2019 , 2018 or 2017 . Revenue Recognition Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration to which Cadence expects to be entitled in exchange for promised goods or services. Cadence’s performance obligations are satisfied either over time or at a point in time. Revenue from performance obligations delivered to customers over time accounted for approximately 85% of Cadence’s total revenue for fiscal 2019 and 2018 . Product and maintenance revenue includes Cadence’s licenses of software and IP, sales of emulation hardware and the related maintenance on these licenses and sales. Service revenue includes revenue received for performing engineering services (which are generally not related to the functionality of other licensed products), customized IP on a fixed fee basis, and sales from cloud-based solutions that provide customers with software and services over a period of time. Cadence enters into contracts that can include various combinations of licenses, products and services, some of which are distinct and are accounted for as separate performance obligations. For contracts with multiple performance obligations, Cadence allocates the transaction price of the contract to each performance obligation, generally on a relative basis using its SSP. Revenue is recognized net of any taxes collected from customers that are subsequently remitted to governmental authorities. Software Revenue Recognition Cadence’s time-based license arrangements grant customers the right to access and use all of the licensed products at the outset of an arrangement and updates are generally made available throughout the entire term of the arrangement, which is generally two to three years. Cadence’s updates provide continued access to evolving technology as customers’ designs migrate to more advanced nodes and as its customers’ technological requirements evolve. In addition, certain time-based license arrangements include remix rights and unspecified additional products that become commercially available during the term of the agreement. Payments are generally received in equal or near equal installments over the term of the agreement. Multiple software licenses, related updates, and technical support in these time-based arrangements constitute a single, combined performance obligation and revenue is recognized over the term of the license, commencing upon the later of the effective date of the arrangement or transfer of the software license. Remix rights are not an additional promised good or service in the contract, and where unspecified additional software product rights are part of the contract with the customer, such rights are accounted for as part of the single performance obligation that includes the licenses, updates, and technical support because such rights are provided for the same period of time and have the same time-based pattern of transfer to the customer. Hardware Revenue Recognition Cadence generally has two performance obligations in arrangements involving the sale or lease of hardware products. The first performance obligation is to transfer the hardware product (which includes software integral to the functionality of the hardware product). The second performance obligation is to provide maintenance on hardware and its embedded software, which includes rights to technical support, hardware repairs and software updates that are all provided over the same term and have the same time-based pattern of transfer to the customer. The transaction price allocated to the hardware product is generally recognized as revenue at the time of delivery because the customer obtains control of the product at that point in time. Cadence has concluded that control generally transfers at that point in time because the customer has title to the hardware, physical possession, and a present obligation to pay for the hardware. The transaction price allocated to maintenance is recognized as revenue ratably over the maintenance term. Payments for hardware contracts are generally received upon delivery of the hardware product. Shipping and handling costs are considered fulfillment costs and are included in cost of product and maintenance in Cadence’s consolidated income statements. IP Revenue Recognition Cadence generally licenses IP under nonexclusive license agreements that provide usage rights for specific designs. In addition, for certain of Cadence’s IP license agreements, royalties are collected as customers ship their own products that incorporate Cadence IP. These arrangements generally have two performance obligations—transferring the licensed IP and associated maintenance, which includes rights to technical support, and software updates that are all provided over the maintenance term and have a time-based pattern of transfer to the customer. Some customers enter into a non-cancellable IP Access Agreement (“IPAA”) whereby the customer commits to a fixed dollar amount over a specified period of time that can be used to purchase from a list of IP products or services. These arrangements do not meet the definition of a revenue contract until the customer executes a separate selection form to identify the products and services that they are purchasing. Each separate selection form under the IPAA is treated as an individual contract and accounted for based on the respective performance obligations. Revenue allocated to the IP license is recognized at a point in time upon the later of the delivery of the IP or the beginning of the license period and revenue allocated to the maintenance is recognized over the maintenance term. Royalties are recognized as revenue in the quarter in which the applicable Cadence customer ships its products that incorporate Cadence IP. Payments for IP contracts are generally received upon delivery of the IP. Cadence customizes certain IP and revenue related to this customization is recognized as services revenue as described below. Services Revenue Recognition Revenue from service contracts is recognized over time, generally using costs incurred or hours expended to measure progress. 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. Payments for services are generally due upon milestones in the contract or upon consumption of the hourly resources. Stock-Based Compensation Cadence recognizes the cost of awards of equity instruments granted to employees in exchange for their services 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. Advertising Cadence expenses the costs of advertising as incurred. Total advertising expense, including marketing programs and events, was $8.4 million , $7.6 million and $7.4 million during fiscal 2019 , 2018 and 2017 , respectively, and is included in marketing and sales in the consolidated income statements. Restructuring Charges Cadence records personnel-related restructuring charges with 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, 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. Accounting for Income Taxes Cadence accounts for the effect of inc

Debt

Debt	12 Months Ended
	Dec. 28, 2019
Debt Disclosure [Abstract]
DEBT	DEBT Cadence’s outstanding debt as of December 28, 2019 and December 29, 2018 was as follows: December 28, 2019 December 29, 2018 (In thousands) Principal Unamortized Discount Carrying Value Principal Unamortized Discount Carrying Value Revolving Credit Facility $ — $ — $ — $ 100,000 $ — $ 100,000 2024 Notes 350,000 (3,981 ) 346,019 350,000 (4,709 ) 345,291 Total outstanding debt $ 350,000 $ (3,981 ) $ 346,019 $ 450,000 $ (4,709 ) $ 445,291 Revolving Credit Facility In January 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. 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. 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 28, 2019 and December 29, 2018 , Cadence was in compliance with all financial covenants associated with the revolving credit facility. 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. The fair value of the 2024 Notes was approximately $378.4 as of December 28, 2019 . 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.

Receivables, Net

Receivables, Net	12 Months Ended
	Dec. 28, 2019
Receivables [Abstract]
RECEIVABLES, NET	RECEIVABLES, NET Cadence’s current and long-term receivables balances as of December 28, 2019 and December 29, 2018 were as follows: As of December 28, December 29, (In thousands) Accounts receivable $ 179,250 $ 164,223 Unbilled accounts receivable 126,165 136,795 Long-term receivables 3,082 5,972 Total receivables 308,497 306,990 Less allowance for doubtful accounts (869 ) (3,936 ) Total receivables, net $ 307,628 $ 303,054 Cadence’s customers are primarily concentrated within the semiconductor and electronics systems industries. As of December 28, 2019 , no customer accounted for 10% or more of Cadence’s total receivables. As of December 29, 2018 , one customer accounted for 11% of Cadence’s total receivables. Allowance for doubtful accounts Cadence’s provisions for losses on its accounts receivable during fiscal 2019 , 2018 and 2017 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 28, 2019 $ 3,936 $ 632 $ (3,699 ) $ 869 Year ended December 29, 2018 — 5,102 (1,166 ) 3,936 Year ended December 30, 2017 $ — $ 2,623 $ (2,623 ) $ —

Revenue

Revenue	12 Months Ended
	Dec. 28, 2019
Revenue from Contract with Customer [Abstract]
REVENUE	REVENUE Cadence combines its products into five categories related to major design activities. On the first day of fiscal 2018, Cadence adopted ASU 2014-09, “Revenue from Contracts with Customers (Topic 606),” which provided a new basis of accounting for its revenue arrangements. Because of the adoption, revenue for fiscal 2019 and 2018 is not directly comparable to revenue for fiscal 2017. The following table shows the percentage of product and related maintenance revenue contributed by each of Cadence’s five product categories and services for fiscal 2019 and 2018 : 2019 2018 2017 Functional Verification, including Emulation and Prototyping Hardware* 24 % 24 % 22 % Digital IC Design and Signoff 29 % 29 % 29 % Custom IC Design and Simulation 25 % 26 % 27 % System Interconnect and Analysis 9 % 9 % 10 % IP 13 % 12 % 12 % Total 100 % 100 % 100 % _____________ * Includes immaterial amount of revenue accounted for under leasing arrangements. Revenue by product category fluctuates from period to period based on demand for products and services, and Cadence’s available resources to deliver them. Certain of Cadence’s licensing arrangements allow customers the ability to remix among software products. Cadence also has arrangements with customers that include a combination of products, with the actual product selection and number of licensed users to be determined at a later date. For these arrangements, Cadence estimates the allocation of the revenue to product groups based upon the expected usage of products. Significant Judgments Cadence’s contracts with customers often include promises to transfer to a customer multiple software and/or IP licenses and services, including professional services, technical support services, and rights to unspecified updates. Determining whether licenses and services are distinct performance obligations that should be accounted for separately, or not distinct and thus accounted for together, requires significant judgment. In some arrangements, such as most of Cadence’s IP license arrangements, Cadence has concluded that the licenses and associated services are distinct from each other. In others, like Cadence’s time-based software arrangements, the licenses and certain services are not distinct from each other. Cadence’s time-based software arrangements include multiple software licenses and updates to the licensed software products, as well as technical support, and Cadence has concluded that these promised goods and services are a single, combined performance obligation. The accounting for contracts with multiple performance obligations requires the contract’s transaction price to be allocated to each distinct performance obligation based on relative SSP. Judgment is required to determine SSP for each distinct performance obligation because Cadence rarely licenses or sells products on a standalone basis. In instances where the SSP is not directly observable because Cadence does not sell the license, product or service separately, Cadence determines the SSP using information that maximizes the use of observable inputs and may include market conditions. Cadence typically has more than one SSP for individual performance obligations due to the stratification of those items by classes of customers and circumstances. In these instances, Cadence may use information such as the size of the customer and geographic region of the customer in determining the SSP. Revenue is recognized over time for Cadence’s combined performance obligations that include software licenses, updates, technical support and maintenance that are separate performance obligations with the same term. For Cadence’s professional services, revenue is recognized over time, generally using costs incurred or hours expended to measure progress. Judgment is required in 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. For Cadence’s other performance obligations recognized over time, revenue is generally recognized using a time-based measure of progress reflecting generally consistent efforts to satisfy those performance obligations throughout the arrangement term. If a group of agreements are so closely related that they are, in effect, part of a single arrangement, such agreements are deemed to be one arrangement for revenue recognition purposes. Cadence exercises significant judgment to evaluate the relevant facts and circumstances in determining whether the separate agreements should be accounted for separately or as, in substance, a single arrangement. Cadence’s judgments about whether a group of contracts comprise a single arrangement can affect the allocation of consideration to the distinct performance obligations, which could have an effect on results of operations for the periods involved. Cadence is required to estimate the total consideration expected to be received from contracts with customers. In limited circumstances, the consideration expected to be received is variable based on the specific terms of the contract or based on Cadence’s expectations of the term of the contract. Generally, Cadence has not experienced significant returns or refunds to customers. These estimates require significant judgment and the change in these estimates could have an effect on its results of operations during the periods involved. Contract Balances The timing of revenue recognition may differ from the timing of invoicing to customers, and these timing differences result in receivables, contract assets, or contract liabilities (deferred revenue) on Cadence’s consolidated balance sheets. For certain software, hardware and IP agreements with payment plans, Cadence records an unbilled receivable related to revenue recognized upon transfer of control because it has an unconditional right to invoice and receive payment in the future related to those transferred products or services. Cadence records a contract asset when revenue is recognized prior to invoicing and Cadence does not have the unconditional right to invoice or retains performance risk with respect to that performance obligation. Cadence records deferred revenue when revenue is recognized subsequent to invoicing. For Cadence’s time-based software agreements, customers are generally invoiced in equal, quarterly amounts, although some customers prefer to be invoiced in single or annual amounts. The contract assets indicated below are presented as prepaid expenses and other in the consolidated balance sheet and primarily relate to Cadence’s rights to consideration for work completed but not billed as of the balance sheet date on services and customized IP contracts. The contract assets are transferred to receivables when the rights become unconditional, usually upon completion of a milestone. Cadence’s contract balances as of December 28, 2019 and December 29, 2018 were as follows: As of December 28, December 29, (In thousands) Contract assets $ 10,209 $ 10,055 Deferred revenue 428,883 401,174 Cadence recognized revenue of $311.8 million during fiscal 2019 , and $284.3 million during fiscal 2018 , that was included in the deferred revenue balance at the beginning of each fiscal year. All other activity in deferred revenue is due to the timing of invoices in relation to the timing of revenue as described above. Payment terms and conditions vary by contract type, although terms generally include a requirement of payment within 30 to 60 days. In instances where the timing of revenue recognition differs from the timing of invoicing, Cadence has determined that its contracts generally do not include a significant financing component. The primary purpose of invoicing terms is to provide customers with simplified and predictable ways of purchasing Cadence’s products and services, and not to facilitate financing arrangements. Remaining Performance Obligations Revenue allocated to remaining performance obligations represents the transaction price allocated to the performance obligations that are unsatisfied, or partially unsatisfied, which includes unearned revenue and amounts that will be invoiced and recognized as revenue in future periods. Cadence has elected to exclude the potential future royalty receipts from the remaining performance obligations. Contracted but unsatisfied performance obligations were approximately $3.6 billion as of December 28, 2019 , which included $205.7 million of non-cancellable IPAA commitments from customers where actual product selection and quantities of specific products or services are to be determined by customers at a later date. Contracted but unsatisfied performance obligations were approximately $3.0 billion as of December 29, 2018 , which included $60.0 million of non-cancellable IPAA commitments from customers. As of December 28, 2019 , Cadence expected to recognize approximately 55% of the revenue included in the contracted but unsatisfied performance obligations, excluding non-cancellable IPAA commitments, over the next 12 months and the remainder thereafter. Cadence recognized revenue of $40.4 million during fiscal 2019 , and $34.3 million during fiscal 2018 , from performance obligations satisfied in previous periods. These amounts represent royalties earned during the period and exclude contracts with nonrefundable prepaid royalties. Nonrefundable prepaid royalties are recognized upon delivery of the IP because Cadence’s right to the consideration is not contingent upon customers’ future shipments.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 28, 2019
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES Cadence’s income before provision (benefit) for income taxes included income from the United States and from foreign subsidiaries for fiscal 2019 , 2018 and 2017 , was as follows: 2019 2018 2017 (In thousands) United States $ 139,306 $ 58,963 $ 81,619 Foreign subsidiaries 339,662 317,427 233,427 Total income before provision (benefit) for income taxes $ 478,968 $ 376,390 $ 315,046 Cadence’s provision (benefit) for income taxes was comprised of the following items for fiscal 2019 , 2018 and 2017 : 2019 2018 2017 (In thousands) Current: Federal $ 15,282 $ 902 $ (2,193 ) State and local 2,716 (1,270 ) (2,097 ) Foreign 48,729 42,657 35,301 Total current 66,727 42,289 31,011 Deferred: Federal (9,001 ) (10,324 ) 76,494 State and local 6,593 886 5,571 Foreign (574,330 ) (2,238 ) (2,131 ) Total deferred (576,738 ) (11,676 ) 79,934 Total provision (benefit) for income taxes $ (510,011 ) $ 30,613 $ 110,945 During the fourth quarter of fiscal 2019, Cadence completed intercompany transfers of certain intangible property rights to its Irish subsidiary, which resulted in the establishment of a deferred tax asset and the recognition of an income tax benefit of $575.6 million . Cadence expects to be able to realize the Irish deferred tax asset in future years and did not provide for a valuation allowance. Cadence considered all available positive and negative evidence, including its past operating results, forecasted earnings, future taxable income, and any prudent and feasible tax planning strategies in making this determination. The U.S. Tax Cuts and Jobs Act (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. The provision for income taxes differs from the amount estimated by applying the United States statutory federal income tax rates of 21% to income before provision (benefit) for income taxes for fiscal 2019 and fiscal 2018 and of 35% to income before provision for income taxes for fiscal 2017 as follows: 2019 2018 2017 (In thousands) Provision computed at federal statutory income tax rate $ 100,583 $ 79,042 $ 110,266 State and local income tax, net of federal tax effect 23,221 15,540 5,867 Intercompany transfers of intangible property rights (575,618 ) — — Foreign income tax rate differential (37,786 ) (37,031 ) (65,296 ) Deemed repatriation transition tax — (1,409 ) 67,188 Remeasurement of U.S. deferred tax assets and liabilities — — 25,200 U.S. tax on foreign entities 57,225 28,846 — Stock-based compensation (29,785 ) (13,539 ) (24,455 ) Change in deferred tax asset valuation allowance 16,796 13,234 4,689 Tax credits (87,793 ) (72,815 ) (26,789 ) Non-deductible research and development expense 4,363 4,700 — Tax effects of intra-entity transfer of assets 895 79 (8,450 ) Domestic production activity deduction — — (2,474 ) Withholding taxes 15,865 11,535 11,225 Tax settlements, foreign 458 — 3,086 Increase (decrease) in unrecognized tax benefits (1,303 ) (1,545 ) 4,054 Other 2,868 3,976 6,834 Provision (benefit) for income taxes $ (510,011 ) $ 30,613 $ 110,945 Effective tax rate (106 )% 8 % 35 % Due to the timing of the enactment and the complexity involved in applying the provisions of the Tax Act, Cadence recorded a provisional $67.2 million expense related to the one-time transition tax during fiscal 2017. In accordance with the Securities and Exchange Commission Staff Accounting Bulletin No. 118, this amount was updated to $65.8 million of expense during fiscal 2018. The components of deferred tax assets and liabilities consisted of the following as of December 28, 2019 and December 29, 2018 : As of December 28, December 29, (In thousands) Deferred tax assets: Tax credit carryforwards $ 206,008 $ 197,524 Reserves and accruals 47,562 43,522 Intangible assets 583,323 12,096 Capitalized research and development expense for income tax purposes 18,477 6,975 Operating loss carryforwards 6,201 15,347 Deferred income 16,704 6,580 Capital loss carryforwards 17,320 20,342 Stock-based compensation costs 15,097 15,329 Depreciation and amortization 8,721 8,759 Investments 2,459 2,900 Lease liability 25,016 — Total deferred tax assets 946,888 329,374 Valuation allowance (125,520 ) (108,724 ) Net deferred tax assets 821,368 220,650 Deferred tax liabilities: Intangible assets (24,907 ) (36,194 ) Undistributed foreign earnings (31,916 ) (27,627 ) ROU assets (25,016 ) — Other (8,350 ) (2,497 ) Total deferred tax liabilities (90,189 ) (66,318 ) Total net deferred tax assets $ 731,179 $ 154,332 During fiscal 2019 and 2018 , Cadence maintained valuation allowances of $125.5 million and $108.7 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 28, 2019 , Cadence’s operating loss carryforwards were as follows: Amount Expiration Periods (In thousands) Federal $ 1,059 from 2021 through 2029 California 28,820 from 2027 through 2036 Other states (tax effected, net of federal benefit) 1,853 from 2020 through 2038 Foreign (tax effected) 2,113 from 2025 through indefinite As of December 28, 2019 , Cadence had tax credit carryforwards of: Amount Expiration Periods (In thousands) Federal* $ 100,128 from 2025 through 2039 California 72,897 indefinite Other states 11,286 from 2020 through indefinite Foreign 21,697 from 2035 through indefinite _____________ *Certain of Cadence’s foreign tax credits have yet to be realized and as a result do not yet have an expiration period. Examinations by Tax Authorities Taxing authorities regularly examine Cadence’s income tax returns. As of December 28, 2019 , 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 2015 United States – California 2015 Ireland 2015 Unrecognized Tax Benefits The changes in Cadence’s gross amount of unrecognized tax benefits during fiscal 2019 , 2018 and 2017 are as follows: 2019 2018 2017 (In thousands) Unrecognized tax benefits at the beginning of the fiscal year $ 101,857 $ 110,179 $ 98,540 Gross amount of the increases (decreases) in unrecognized tax benefits of tax positions taken during a prior year* (3,143 ) (4,183 ) 688 Gross amount of the increases in unrecognized tax benefits as a result of tax positions taken during the current year 8,951 2,370 13,141 Amount of decreases in unrecognized tax benefits relating to settlements with taxing authorities, including the utilization of tax attributes (380 ) — — Reductions to unrecognized tax benefits resulting from the lapse of the applicable statute of limitations (1,692 ) (5,179 ) (3,028 ) Effect of foreign currency translation 448 (1,330 ) 838 Unrecognized tax benefits at the end of the fiscal year $ 106,041 $ 101,857 $ 110,179 Total amounts of unrecognized tax benefits that, if upon resolution of the uncertain tax positions would reduce Cadence’s effective tax rate $ 61,527 $ 58,022 $ 63,108 _____________ * Includes unrecognized tax benefits of tax positions recorded in connection with acquisitions It is reasonably possible that the amount of unrecognized tax positions could decrease by approximately $10 million during the next 12 months. The potential decrease could be primarily driven by settlements with tax authorities. The actual amount could vary significantly depending on the ultimate timing and nature of any settlements. The total amounts of interest, net of tax, and penalties recognized in the consolidated income statements as provision (benefit) for income taxes for fiscal 2019 , 2018 and 2017 were as follows: 2019 2018 2017 (In thousands) Interest $ 490 $ 585 $ 1,865 Penalties 19 342 218 The total amounts of gross accrued interest and penalties recognized in the consolidated balance sheets as of December 28, 2019 and December 29, 2018 were as follows: As of December 28, December 29, (In thousands) Interest $ 3,500 $ 2,699 Penalties 12 10

Leases

Leases	12 Months Ended
	Dec. 28, 2019
Leases [Abstract]
Leases	LEASES Operating lease expense, which includes immaterial amounts of short-term leases, variable lease costs and sublease income, was as follows during fiscal 2019 , 2018 and 2017 : 2019 2018 2017 (In thousands) Operating lease expense $ 34,709 $ 33,717 $ 32,089 Additional activity related to Cadence’s leases during fiscal 2019 was as follows: 2019 Cash paid for amounts included in the measurement of operating lease liabilities $ 34,961 ROU assets obtained in exchange for operating lease obligations 38,090 ROU lease assets and lease liabilities for Cadence’s operating leases were recorded in the consolidated balance sheet as follows: As of December 28, 2019 (In thousands) Other assets $ 100,343 Accounts payable and accrued liabilities 25,558 Other long-term liabilities 84,782 Total lease liabilities $ 110,340 Weighted average remaining lease term (in years) 5.1 Weighted average discount rate 4.5 % Future lease payments included in the measurement of lease liabilities on the consolidated balance sheet as of December 28, 2019 , for the following five fiscal years and thereafter were as follows: Operating Leases (In thousands) 2020 $ 29,253 2021 29,185 2022 21,049 2023 15,474 2024 10,500 Thereafter 19,359 Total future lease payments 124,820 Less imputed interest (14,480 ) Total $ 110,340 As of December 29, 2018 , future minimum lease payments, as defined under the previous lease accounting guidance of ASC Topic 840, under non-cancelable operating leases for the following five fiscal years and thereafter were as follows: Operating Leases (In thousands) 2019 $ 26,252 2020 23,130 2021 19,778 2022 14,243 2023 11,510 Thereafter 17,100 Total lease payments $ 112,013

Investments

Investments	12 Months Ended
	Dec. 28, 2019
Equity Method Investments and Joint Ventures [Abstract]
INVESTMENTS	INVESTMENTS Cadence has a portfolio of equity investments that includes investments in both marketable and non-marketable securities. These investments primarily consist of cash investments in companies with technologies or services that are potentially strategically important to Cadence. Marketable Equity Investments Cadence’s investment in marketable equity securities consists of purchased shares of a publicly held company and is included in prepaid expense and other in Cadence’s consolidated balance sheets. During fiscal 2019 and 2018, with the adoption of ASU 2016-01, changes in the fair value of these investments were recorded to other income, net in Cadence’s consolidated income statements. Non-Marketable Equity Investments Cadence’s investments in non-marketable equity securities generally consist of stock, convertible debt or other instruments of privately held entities and are included in other assets on Cadence’s consolidated balance sheets. Cadence holds a 16% interest in a privately held company that is accounted for using the equity method of accounting. The carrying value of this investment was $136.3 million and $115.9 million as of December 28, 2019 and December 29, 2018 , respectively. During fiscal 2019 , Cadence recorded a loss to other income, net in Cadence’s consolidated income statements of $6.9 million , which represented Cadence’s proportionate share of net income from the investee, offset by amortization of basis differences. Cadence also holds other non-marketable investments in privately held companies where Cadence does not have the ability to exercise significant influence and the fair value of the investments is not readily determinable. The carrying value of these investments was $1.9 million and $2.8 million as of December 28, 2019 and December 29, 2018 , respectively. During fiscal 2019, Cadence recognized net gains of $2.1 million , of which a loss of $0.9 million related to equity securities still held as of December 28, 2019 . During fiscal 2018, Cadence recognized net gains of $3.3 million , of which a loss of $0.1 million related to equity securities still held as of December 29, 2018 .

Acquisitions

Acquisitions	12 Months Ended
	Dec. 28, 2019
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 recorded a total of $76.4 million of acquired intangible assets (of which $71.5 million represented in-process technology), $90.2 million of goodwill and $19.6 million of net liabilities consisting primarily of deferred tax liabilities. Cadence will make payments to certain employees, subject to continued employment, through the fourth quarter of fiscal 2020. 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. 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 on whether to proceed with the transaction. Acquisition-Related Transaction Costs Transaction costs associated with acquisitions were $2.3 million , $0.6 million and $1.1 million during fiscal 2019 , 2018 and 2017 , 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. 28, 2019
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 2019 and 2018 were as follows: Gross Carrying Amount (In thousands) Balance as of December 30, 2017 $ 666,009 Effect of foreign currency translation (3,737 ) Balance as of December 29, 2018 662,272 Effect of foreign currency translation (416 ) Balance as of December 28, 2019 $ 661,856 Cadence completed its annual goodwill impairment test during the third quarter of fiscal 2019 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 28, 2019 were as follows, excluding intangibles that were fully amortized as of December 29, 2018 : Gross Carrying Amount Accumulated Amortization Acquired Intangibles, Net (In thousands) Existing technology $ 363,142 $ (245,902 ) $ 117,240 Agreements and relationships 146,395 (112,565 ) 33,830 Tradenames, trademarks and patents 7,600 (5,795 ) 1,805 Total acquired intangibles with definite lives 517,137 (364,262 ) 152,875 In-process technology 19,500 — 19,500 Total acquired intangibles $ 536,637 $ (364,262 ) $ 172,375 In-process technology as of December 28, 2019 consisted of acquired projects that, if completed, will contribute to Cadence’s design IP offerings. As of December 28, 2019 , these projects were expected to be completed in approximately three months. During fiscal 2019, Cadence completed certain projects previously included in in-process technology and transferred $52.0 million to existing technology. Acquired intangibles as of December 29, 2018 were as follows, excluding intangibles that were fully amortized as of December 30, 2017 : Gross Carrying Amount Accumulated Amortization Acquired Intangibles, Net (In thousands) Existing technology $ 330,500 $ (225,383 ) $ 105,117 Agreements and relationships 146,426 (100,211 ) 46,215 Tradenames, trademarks and patents 10,718 (8,093 ) 2,625 Total acquired intangibles with definite lives 487,644 (333,687 ) 153,957 In-process technology 71,500 — 71,500 Total acquired intangibles $ 559,144 $ (333,687 ) $ 225,457 Amortization expense from existing technology and maintenance agreements is included in cost of product and maintenance. Amortization expense for fiscal 2019 , 2018 and 2017 , by consolidated income statement caption, was as follows: 2019 2018 2017 (In thousands) Cost of product and maintenance $ 40,951 $ 39,247 $ 41,781 Amortization of acquired intangibles 12,128 14,086 14,716 Total amortization of acquired intangibles $ 53,079 $ 53,333 $ 56,497 As of December 28, 2019 , the estimated amortization expense for intangible assets with definite lives was as follows for the following five fiscal years and thereafter: (In thousands) 2020 $ 49,419 2021 44,758 2022 26,453 2023 13,967 2024 12,618 Thereafter 5,660 Total estimated amortization expense $ 152,875

Stock Compensation Plans and St

Stock Compensation Plans and Stock Based Compensation	12 Months Ended
	Dec. 28, 2019
Share-based Payment Arrangement [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 2019, Cadence’s stockholders approved an amendment to the Omnibus Plan to increase the number of shares of common stock authorized for issuance by 4.0 million . As of December 28, 2019 , the total number of shares available for future issuance under the Omnibus Plan was 9.4 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 period of three years to four years . 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 28, 2019 , the total number of shares available for future issuance under the Directors Plan was 0.5 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. 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 2019 , 2018 and 2017 were as follows: 2019 2018 2017 (In thousands) Stock options $ 6,806 $ 5,581 $ 5,417 Restricted stock 164,078 153,348 117,797 ESPP 10,663 8,786 6,809 Total stock-based compensation expense $ 181,547 $ 167,715 $ 130,023 Income tax benefit $ 30,118 $ 32,830 $ 36,664 Stock-based compensation expense is reflected in Cadence’s consolidated income statements during fiscal 2019 , 2018 and 2017 as follows: 2019 2018 2017 (In thousands) Cost of product and maintenance $ 2,759 $ 2,631 $ 2,218 Cost of services 3,510 3,714 3,232 Marketing and sales 39,088 34,665 26,838 Research and development 114,656 104,353 77,222 General and administrative 21,534 22,352 20,513 Total stock-based compensation expense $ 181,547 $ 167,715 $ 130,023 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 2019 , 2018 and 2017 were as follows: 2019 2018 2017 Dividend yield None None None Expected volatility 24.4 % 24.3 % 21.2 % Risk-free interest rate 2.47 % 2.54 % 2.01 % Expected term (in years) 4.8 4.8 4.8 Weighted-average fair value of options granted $ 14.58 $ 10.24 $ 6.86 A summary of the changes in stock options outstanding under Cadence’s equity incentive plans during fiscal 2019 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 29, 2018 5,414 $ 20.51 Granted 595 56.57 Exercised (1,076 ) 13.52 Forfeited — — Options outstanding as of December 28, 2019 4,933 $ 26.38 3.4 $ 216,599 Options vested as of December 28, 2019 3,772 $ 21.00 2.8 $ 185,923 Cadence had total unrecognized compensation expense related to stock option grants of $ 12.7 million as of December 28, 2019 , 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 2019 , 2018 and 2017 was: 2019 2018 2017 (In thousands) Intrinsic value of options exercised $ 51,625 $ 31,109 $ 45,643 Cash received from options exercised 14,553 11,748 22,255 Restricted Stock Generally, restricted stock, which includes restricted stock awards and restricted stock units, vests over three years 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, market-based performance stock awards granted to executives vest over three to five years and are subject to certain market conditions and the executive’s continuing service to Cadence. Stock-based compensation expense is recognized straight-line over the vesting term. If the market-based performance conditions are not ultimately met, compensation expense previously recognized is not reversed. As of December 28, 2019 , Cadence had 2.2 million shares of unvested long-term, market-based performance stock awards outstanding. Stock-based compensation expense related to performance-based and market-based performance restricted stock grants for fiscal 2019 , 2018 and 2017 was as follows: 2019 2018 2017 (In thousands) Stock-based compensation expense related to performance-based restricted stock $ 12,640 $ 12,868 $ 8,224 Stock-based compensation expense related to market-based performance stock awards 7,019 2,300 1,979 A summary of the changes in restricted stock outstanding under Cadence’s equity incentive plans during fiscal 2019 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 29, 2018 9,702 $ 32.67 Granted 4,028 53.11 Vested (4,799 ) 31.75 Forfeited (538 ) 39.66 Unvested shares as of December 28, 2019 8,393 $ 42.55 1.1 $ 589,937 Cadence had total unrecognized compensation expense related to restricted stock grants of $287.7 million as of December 28, 2019 , 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 2019 , 2018 and 2017 was: 2019 2018 2017 (In thousands) Fair value of restricted stock realized upon vesting $ 298,320 $ 232,099 $ 174,548 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, for the offering period that commenced August 1, 2018, 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 10% of their annual base earnings plus bonuses and commissions, and subject to a limit in any calendar year of $10,000 . Each offering period has a duration of six months beginning on either February 1 or August 1. The purchase dates fall on the last days of the six-month offering periods. Under the ESPP and through the July 31, 2018 purchase date, participating employees could contribute up to 7% of their annual base earnings plus bonuses and commissions, subject to a limit in any calendar year of $8,000 . As of December 28, 2019 , the total number of shares available for future issuance under the ESPP was 6.0 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 2019 , 2018 and 2017 were as follows: 2019 2018 2017 Dividend yield None None None Expected volatility 27.9 % 21.1 % 20.4 % Risk-free interest rate 2.23 % 2.05 % 0.92 % Expected term (in years) 0.5 0.5 0.5 Weighted-average fair value of options granted $ 14.37 $ 9.24 $ 6.64 Shares of common stock issued under the ESPP for fiscal 2019 , 2018 and 2017 were as follows: 2019 2018 2017 (In thousands, except per share amounts) Cadence shares purchased under the ESPP 988 892 1,270 Cash received for the purchase of shares under the ESPP $ 38,290 $ 29,160 $ 26,709 Weighted-average purchase price per share $ 38.74 $ 32.69 $ 21.04 Reserved for Future Issuance As of December 28, 2019 , Cadence had reserved the following shares of authorized but unissued common stock for future issuance: Shares (In thousands) Employee equity incentive plans* 15,898 Employee stock purchase plans 6,039 Directors stock plans* 905 Total 22,842 _____________ *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 Repurchase Programs

Stock Repurchase Programs	12 Months Ended
	Dec. 28, 2019
Equity [Abstract]
STOCK REPURCHASE PROGRAMS	STOCK REPURCHASE PROGRAMS At the end of fiscal 2018, approximately $175 million remained available under Cadence’s previously announced authorization to repurchase shares of its common stock. In February 2019, Cadence’s Board of Directors authorized the repurchase of an additional $500 million . The actual timing and amount of repurchases are subject to business and market conditions, corporate and regulatory requirements, stock price, acquisition opportunities and other factors. As of December 28, 2019 , approximately $369 million remained available to repurchase shares of Cadence common stock. The shares repurchased under Cadence’s repurchase authorizations and the total cost of repurchased shares, including commissions, during fiscal 2019 , 2018 and 2017 were as follows: 2019 2018 2017 (In thousands) Shares repurchased 4,841 5,934 2,495 Total cost of repurchased shares $ 306,148 $ 250,059 $ 100,025

Restructuring and Other Charges

Restructuring and Other Charges	12 Months Ended
	Dec. 28, 2019
Restructuring and Related Activities [Abstract]
RESTRUCTURING AND OTHER CHARGES	RESTRUCTURING AND OTHER CHARGES Cadence has initiated 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 and charges related to abandoned assets. During the fourth quarter of fiscal 2019, Cadence initiated a restructuring plan (the “2019 Restructuring Plan”) and recorded restructuring and other charges of $9.9 million related to severance payments and termination benefits. As of December 28, 2019 , total liabilities related to the 2019 Restructuring Plan were $9.1 million . Cadence has also initiated restructuring plans in prior years, including both fiscal 2018 and fiscal 2017 (the “prior restructuring plans”). During fiscal 2019 , Cadence revised certain estimates made in connection with the prior restructuring plans and recorded credits of $1.3 million . As of December 28, 2019 , total liabilities related to the prior restructuring plans were $0.5 million . The following table presents activity for Cadence’s restructuring plans during fiscal 2019 , 2018 and 2017 : Severance and Benefits Excess Facilities Total (In thousands) 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 Restructuring and other charges, net 10,268 821 11,089 Cash payments (12,688 ) (192 ) (12,880 ) Effect of foreign currency translation 61 (30 ) 31 Balance, December 29, 2018 $ 11,176 $ 848 $ 12,024 Restructuring and other charges (credits), net 8,649 (28 ) 8,621 Cash payments (10,714 ) (420 ) (11,134 ) Effect of foreign currency translation 118 9 127 Balance, December 28, 2019 $ 9,229 $ 409 $ 9,638 The remaining liability for Cadence’s restructuring plans is recorded in the consolidated balance sheet as follows: As of December 28, 2019 (In thousands) Accounts payable and accrued liabilities $ 9,520 Other long-term liabilities 118 Total liabilities $ 9,638 All liabilities for severance and related benefits under Cadence’s restructuring plans are included in accounts payable and accrued liabilities on Cadence’s consolidated balance sheet as of December 28, 2019 . Restructuring liabilities included in other long-term liabilities represent liabilities from vacated facilities, and Cadence expects to make cash payments to settle these liabilities through fiscal 2022.

Other Income, Net

Other Income, Net	12 Months Ended
	Dec. 28, 2019
Other Income and Expenses [Abstract]
OTHER INCOME, NET	OTHER INCOME, NET Cadence’s other income, net, for fiscal 2019 , 2018 and 2017 was as follows: 2019 2018 2017 (In thousands) Interest income $ 9,509 $ 8,070 $ 3,879 Gains (losses) on marketable equity investments 713 (551 ) 520 Gains (losses) on non-marketable equity investments (4,802 ) 3,300 8,934 Gains (losses) on securities in NQDC trust 5,402 (1,471 ) 6,145 Losses on foreign exchange (4,111 ) (5,557 ) (2,920 ) Other income (loss), net (710 ) (471 ) 197 Total other income, net $ 6,001 $ 3,320 $ 16,755

Net Income per Share

Net Income per Share	12 Months Ended
	Dec. 28, 2019
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 2019 , 2018 and 2017 are as follows: 2019 2018 2017 (In thousands, except per share amounts) Net income $ 988,979 $ 345,777 $ 204,101 Weighted-average common shares used to calculate basic net income per share 273,239 273,729 272,097 Stock-based awards 7,276 7,415 8,124 Weighted-average common shares used to calculate diluted net income per share 280,515 281,144 280,221 Net income per share – basic $ 3.62 $ 1.26 $ 0.75 Net income per share – diluted $ 3.53 $ 1.23 $ 0.73 The following table presents shares of Cadence’s common stock outstanding for fiscal 2019 , 2018 and 2017 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: 2019 2018 2017 (In thousands) Long-term market-based awards 1,097 50 152 Options to purchase shares of common stock 359 637 303 Non-vested shares of restricted stock 727 290 77 Total potential common shares excluded 2,183 977 532

Balance Sheet Components

Balance Sheet Components	12 Months Ended
	Dec. 28, 2019
Disclosure Text Block Supplement [Abstract]
BALANCE SHEET COMPONENTS	BALANCE SHEET COMPONENTS A summary of certain balance sheet components as of December 28, 2019 and December 29, 2018 is as follows: As of December 28, December 29, (In thousands) Inventories: Raw materials $ 36,637 $ 16,392 Finished goods 19,165 11,770 Inventories $ 55,802 $ 28,162 Property, plant and equipment: Computer equipment and related software $ 554,874 $ 574,333 Buildings 126,795 126,927 Land 55,820 55,802 Leasehold, building and land improvements 106,456 108,529 Furniture and fixtures 23,425 27,087 Equipment 38,955 52,088 In-process capital assets 4,706 6,357 Total cost 911,031 951,123 Less: Accumulated depreciation and amortization (635,176 ) (698,493 ) Property, plant and equipment, net $ 275,855 $ 252,630 Other assets: Non-marketable investments $ 138,212 $ 118,734 ROU lease assets* 100,343 — Other long-term assets 106,874 103,575 Other assets $ 345,429 $ 222,309 Accounts payable and accrued liabilities: Payroll and payroll-related accruals $ 200,163 $ 192,887 Other accrued operating liabilities 116,745 63,639 Accounts payable and accrued liabilities $ 316,908 $ 256,526 Other long-term liabilities: Operating lease liabilities* $ 84,782 $ — Other accrued liabilities 77,739 77,262 Other long-term liabilities $ 162,521 $ 77,262 _____________ * Cadence adopted Topic 842, the new accounting standard for leasing arrangements on December 30, 2018, the first day of fiscal 2019. For additional information regarding Cadence’s leases, see Note 7 in the notes to consolidated financial statements.

Fair Value

Fair Value	12 Months Ended
	Dec. 28, 2019
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. The valuation techniques used to determine the fair value of Cadence’s 2024 Notes are classified within Level 2 of the fair value hierarchy. For additional information relating to Cadence’s debt arrangements, see Note 3 in the notes to consolidated financial statements. 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 2019. 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 28, 2019 and December 29, 2018 : Fair Value Measurements as of December 28, 2019: Total Level 1 Level 2 Level 3 (In thousands) Assets Cash equivalents: Money market funds $ 445,942 $ 445,942 $ — $ — Marketable equity securities 4,600 4,600 — — Securities held in NQDC trust 34,096 34,096 — — Foreign currency exchange contracts 3,557 — 3,557 — Total Assets $ 488,195 $ 484,638 $ 3,557 $ — As of December 28, 2019, Cadence did not have any financial liabilities requiring a recurring fair value measurement. Fair Value Measurements as of December 29, 2018: Total Level 1 Level 2 Level 3 (In thousands) Assets Cash equivalents: Money market funds $ 327,841 $ 327,841 $ — $ — Marketable equity securities 3,887 3,887 — — Securities held in NQDC trust 27,767 27,767 — — Foreign currency exchange contracts 101 — 101 — Total Assets $ 359,596 $ 359,495 $ 101 $ — As of December 29, 2018, Cadence did not have any financial liabilities requiring a recurring fair value measurement.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 28, 2019
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Purchase Obligations Cadence had purchase obligations of $42.7 million as of December 28, 2019 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 2019 , 2018 or 2017 . 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 2019 , 2018 or 2017 .

Employee and Director Benefit P

Employee and Director Benefit Plans	12 Months Ended
	Dec. 28, 2019
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 2019 , 2018 and 2017 were as follows: 2019 2018 2017 (In thousands) Contributions to defined contribution plans $ 25,269 $ 25,731 $ 26,010 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 in other assets in the consolidated balance sheets and gains and losses are recognized as other income, net in the consolidated income statements. 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.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 28, 2019
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 and changes in defined benefit plan liabilities and is presented in Cadence’s consolidated statements of comprehensive income. Accumulated other comprehensive loss was comprised of the following as of December 28, 2019 , and December 29, 2018 : As of December 28, December 29, (In thousands) Foreign currency translation loss $ (29,503 ) $ (20,861 ) Changes in defined benefit plan liabilities (7,423 ) (3,919 ) Total accumulated other comprehensive loss $ (36,926 ) $ (24,780 ) For fiscal 2019 , 2018 and 2017

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 28, 2019
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. Property, plant and equipment 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 2019 , 2018 and 2017 : 2019 2018 2017 (In thousands) Americas: United States $ 982,380 $ 924,644 $ 829,436 Other Americas 43,473 32,531 35,067 Total Americas 1,025,853 957,175 864,503 Asia: China 241,474 210,194 173,107 Other Asia 459,028 395,221 353,094 Total Asia 700,502 605,415 526,201 Europe, Middle East and Africa 433,314 406,877 385,705 Japan 176,650 168,555 166,623 Total $ 2,336,319 $ 2,138,022 $ 1,943,032 The following table presents a summary of property, plant and equipment assets by geography as of December 28, 2019 , December 29, 2018 and December 30, 2017 : As of December 28, December 29, December 30, (In thousands) Americas: United States $ 220,023 $ 200,025 $ 198,744 Other Americas 728 475 611 Total Americas 220,751 200,500 199,355 Asia: China 15,729 9,608 3,005 Other Asia 27,890 30,021 34,673 Total Asia 43,619 39,629 37,678 Europe, Middle East and Africa 10,474 11,784 13,615 Japan 1,011 717 694 Total $ 275,855 $ 252,630 $ 251,342

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 28, 2019
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENT On January 15, 2020, Cadence acquired all of the outstanding equity of AWR Corporation (“AWR”). On February 6, 2020, Cadence also acquired all of the outstanding equity of Integrand Software, Inc. (“Integrand”). These acquisitions enhance Cadence’s technology portfolio to address growing RF/microwave design activity, driven by expanding use of 5G communications. The aggregate cash consideration for these acquisitions of approximately $195 million will be 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 expects to complete the initial accounting for its acquisition of AWR and Integrand during the first quarter of fiscal 2020.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 28, 2019
Accounting Policies [Abstract]
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. The valuation techniques used to determine the fair value of Cadence’s 2024 Notes are classified within Level 2 of the fair value hierarchy. For additional information relating to Cadence’s debt arrangements, see Note 3 in the notes to consolidated financial statements.
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. Cadence’s fiscal years are 52- or 53-week periods ending on the Saturday closest to December 31. Fiscal 2019 , 2018 and 2017 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.
Comparability	Comparability Prior period balances for deferred tax assets in Cadence’s consolidated balance sheets have been reclassified to conform to the current period presentation. Effective the first day of fiscal 2019, Cadence adopted multiple new accounting standards. Prior periods were not retrospectively restated, so the consolidated balance sheet as of December 28, 2019 was prepared using accounting standards that were different than those in effect as of December 29, 2018. Therefore, the consolidated balance sheets as of December 28, 2019 and December 29, 2018 are not directly comparable. Cadence also adopted multiple new accounting standards on the first day of fiscal 2018, including standards related to revenue recognition and accounting for income taxes. Prior periods were not retrospectively restated, so the consolidated balance sheets as of December 28, 2019 and December 29, 2018, are not directly comparable to the consolidated balance sheet as of December 30, 2017, nor are the results of operations for fiscal 2019 and fiscal 2018 directly comparable to the results of operations for fiscal 2017.
Recently Adopted Accounting Standards	Recently Adopted Accounting Standards Leases In February 2016, the Financial Accounting Standards Board (“FASB”) issued accounting standards update (“ASU”) 2016-02, “Leases (Topic 842)” (“Topic 842”), which requires the recognition of right-of-use (“ROU”) assets and lease liabilities on the balance sheet. The most prominent of the changes in the standard is the recognition of ROU assets and lease liabilities by lessees for those leases classified as operating leases. Cadence adopted the new standard on December 30, 2018, the first day of fiscal 2019, and used the modified retrospective approach with the effective date as the date of initial application. Consequently, prior period balances and disclosures have not been restated. Cadence elected certain practical expedients, which among other things, allowed it to carry forward prior conclusions about lease identification and classification. Adoption of the standard resulted in the balance sheet recognition of additional lease assets and lease liabilities of approximately $80 million ; however, the adoption of the standard did not have an impact on Cadence’s beginning retained earnings, results from operations or cash flows. Additionally, the new standard did not have a material impact on the consolidated financial statements for arrangements in which Cadence is the lessor. For additional information regarding Cadence’s leases, see Note 7 in the notes to consolidated financial statements. Income Tax Effects within Accumulated Other Comprehensive income In February 2018, the FASB issued ASU 2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income,” which allows a reclassification of the income tax effects of the U.S. Tax Cuts and Jobs Act (the “Tax Act”) on items within accumulated other comprehensive income to retained earnings. This standard became effective for Cadence on December 30, 2018, the first day of fiscal 2019. The adoption of this standard did not have a material impact on Cadence’s consolidated financial 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.
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, accounts receivable, investments and forward contracts. Credit exposure related to Cadence’s foreign currency forward contracts is limited to the realized and unrealized gains on these contracts.
Cash and Cash Equivalents	Cash and Cash Equivalents 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.
Receivables	Receivables
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 general and administrative expenses.
Inventories	Inventories Inventories are stated at the lower of cost or net realizable 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 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 $2.4 million , $3.6 million , and $2.2 million during fiscal 2019 , 2018 and 2017 , respectively. Cadence recorded depreciation and amortization expense of $63.3 million , $60.4 million and $52.9 million during fiscal 2019 , 2018 and 2017 , 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 2019 , 2018 and 2017
Commissions Expense	Deferred Sales Commissions Cadence records an asset for the incremental costs of obtaining a contract with a customer, including direct sales commissions that are earned upon execution of the contract. Cadence uses the portfolio method to recognize the amortization expense related to these capitalized costs related to initial contracts and renewals and such expense is recognized over a period associated with the revenue of the related portfolio, which is generally two to three years for Cadence’s software arrangements and upon delivery for its hardware and IP arrangements. Incremental costs related to initial contracts and renewals are amortized over the period of the arrangement in each case because Cadence pays the same commission rate for both new contracts and renewals. Deferred sales commissions are tested for impairment on an ongoing basis when events or changes in circumstances indicate that the carrying amount may not be recoverable. An impairment is recognized to the extent that the amount of deferred sales commission exceeds the remaining expected gross margin (remaining revenue less remaining direct costs) on the goods and services to which the deferred sales commission relates. Total capitalized costs were $31.6 million and $31.2 million as of December 28, 2019 , and December 29, 2018 , respectively, and are included in other assets in Cadence’s consolidated balance sheet. Amortization of these assets was $29.4 million and $26.5 million during fiscal 2019 and 2018 , respectively, and is included in sales and marketing expense in Cadence’s consolidated income statement.
Goodwill	Goodwill
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 years 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.
Lessee Considerations	Lessee Considerations Cadence has operating leases primarily consisting of facilities with remaining lease terms of approximately one year to eleven years . Cadence has options to terminate many of its leases early. The lease term represents the period up to the early termination date unless it is reasonably certain that Cadence will not exercise the early termination option. For certain leases, Cadence has options to extend the lease term for additional periods ranging from one year to ten years . These renewal options are not considered in the remaining lease term unless it is reasonably certain that Cadence will exercise such options. At inception of a contract, Cadence determines an arrangement contains a lease if the arrangement conveys the right to use an identified asset and Cadence obtains substantially all of the economic benefits from the asset and has the ability to direct the use of the asset. Leases with an initial term of twelve months or less are not recorded on the balance sheet. For lease agreements entered into or reassessed after the adoption of Topic 842, Cadence combines the lease and non-lease components in determining the lease liabilities and ROU assets. Non-lease components primarily include common-area maintenance and other management fees. Operating lease expense is generally recognized evenly over the term of the lease. Payments under Cadence's lease agreements are primarily fixed; however, certain agreements contain rental payments that are adjusted periodically based on changes in consumer price and other indices. Changes to payments resulting from changes in indices are expensed as incurred and not included in the measurement of lease liabilities and ROU assets. Cadence’s lease agreements do not provide an implicit borrowing rate, therefore an internal incremental borrowing rate is determined based on information available at lease commencement date for purposes of determining the present value of lease payments. The incremental borrowing rate represents a comparable rate to borrow on a collateralized basis over a similar term and in the economic environment where the leased asset is located. Cadence used the incremental borrowing rate on the effective date for all leases that commenced prior to that date.
Lessor Considerations	Lessor Considerations Although most of Cadence’s revenue from its hardware business comes from sales of hardware, Cadence also leases its hardware products to some customers. Cadence determines the existence of a lease when the customer controls the use of the identified hardware for a period of time defined in the lease agreement. Cadence’s leases range in duration up to three years with payments generally collected in equal quarterly installments. Cadence’s leases do not include termination rights or variable pricing and typically do not include purchase rights at the end of the lease. Short-term leases are usually less than two years and are classified as operating leases with revenue recognized and depreciation expensed on a straight-line basis over the term of the lease. Long-term leases are typically for three years and are classified as sales-type leases with revenue and cost of sales recognized upon delivery. Cadence’s operating leases and sales-type leases contain both lease and non-lease components. Because the pattern of revenue recognition is the same for both the lease and non-lease components in Cadence’s operating leases, Cadence has elected the practical expedient to not separate lease and related non-lease components and accounts for both components under Topic 842. Cadence allocates value to the lease and non-lease components in its sales-type leases using standalone selling prices (“SSPs”) similar to those used under ASU 2014-09, “Revenue from Contracts with Customers (Topic 606),” the current accounting standard governing revenue recognition. When Cadence leases its hardware in the same arrangement as software or IP, Cadence allocates value to each performance obligation using SSPs.
Investments in Equity Securities	Investments in Equity Securities Cadence’s investments in marketable equity securities are carried at fair value as a component of prepaid expenses and other in the consolidated balance sheets. Cadence records realized and unrealized holding gains or losses as part of other income, net in the consolidated income statements. 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 the measurement alternative when the fair value of the investment is not readily determinable and Cadence does not have the ability to exercise significant influence or the equity method of accounting when it is determined that Cadence has the ability to exercise significant influence. For investments accounted for using the equity method of accounting, Cadence records its proportionate share of the investee’s income or loss, net of the effects of any basis differences, to other income, net on a one-quarter lag in Cadence’s consolidated income statements.
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.
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 carried at fair value, with the unrealized gains and losses recognized in the consolidated income statements as other income, net. These securities are classified in other assets in the consolidated balance sheets because they 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.
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 in the consolidated statements of stockholders’ equity. There were no losses recorded as a component of retained earnings by Cadence on the reissuance of treasury stock during fiscal 2019 , 2018 or 2017 .
Revenue Recognition	Revenue Recognition Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration to which Cadence expects to be entitled in exchange for promised goods or services. Cadence’s performance obligations are satisfied either over time or at a point in time. Revenue from performance obligations delivered to customers over time accounted for approximately 85% of Cadence’s total revenue for fiscal 2019 and 2018 . Product and maintenance revenue includes Cadence’s licenses of software and IP, sales of emulation hardware and the related maintenance on these licenses and sales. Service revenue includes revenue received for performing engineering services (which are generally not related to the functionality of other licensed products), customized IP on a fixed fee basis, and sales from cloud-based solutions that provide customers with software and services over a period of time. Cadence enters into contracts that can include various combinations of licenses, products and services, some of which are distinct and are accounted for as separate performance obligations. For contracts with multiple performance obligations, Cadence allocates the transaction price of the contract to each performance obligation, generally on a relative basis using its SSP. Revenue is recognized net of any taxes collected from customers that are subsequently remitted to governmental authorities. Software Revenue Recognition Cadence’s time-based license arrangements grant customers the right to access and use all of the licensed products at the outset of an arrangement and updates are generally made available throughout the entire term of the arrangement, which is generally two to three years. Cadence’s updates provide continued access to evolving technology as customers’ designs migrate to more advanced nodes and as its customers’ technological requirements evolve. In addition, certain time-based license arrangements include remix rights and unspecified additional products that become commercially available during the term of the agreement. Payments are generally received in equal or near equal installments over the term of the agreement. Multiple software licenses, related updates, and technical support in these time-based arrangements constitute a single, combined performance obligation and revenue is recognized over the term of the license, commencing upon the later of the effective date of the arrangement or transfer of the software license. Remix rights are not an additional promised good or service in the contract, and where unspecified additional software product rights are part of the contract with the customer, such rights are accounted for as part of the single performance obligation that includes the licenses, updates, and technical support because such rights are provided for the same period of time and have the same time-based pattern of transfer to the customer. Hardware Revenue Recognition Cadence generally has two performance obligations in arrangements involving the sale or lease of hardware products. The first performance obligation is to transfer the hardware product (which includes software integral to the functionality of the hardware product). The second performance obligation is to provide maintenance on hardware and its embedded software, which includes rights to technical support, hardware repairs and software updates that are all provided over the same term and have the same time-based pattern of transfer to the customer. The transaction price allocated to the hardware product is generally recognized as revenue at the time of delivery because the customer obtains control of the product at that point in time. Cadence has concluded that control generally transfers at that point in time because the customer has title to the hardware, physical possession, and a present obligation to pay for the hardware. The transaction price allocated to maintenance is recognized as revenue ratably over the maintenance term. Payments for hardware contracts are generally received upon delivery of the hardware product. Shipping and handling costs are considered fulfillment costs and are included in cost of product and maintenance in Cadence’s consolidated income statements. IP Revenue Recognition Cadence generally licenses IP under nonexclusive license agreements that provide usage rights for specific designs. In addition, for certain of Cadence’s IP license agreements, royalties are collected as customers ship their own products that incorporate Cadence IP. These arrangements generally have two performance obligations—transferring the licensed IP and associated maintenance, which includes rights to technical support, and software updates that are all provided over the maintenance term and have a time-based pattern of transfer to the customer. Some customers enter into a non-cancellable IP Access Agreement (“IPAA”) whereby the customer commits to a fixed dollar amount over a specified period of time that can be used to purchase from a list of IP products or services. These arrangements do not meet the definition of a revenue contract until the customer executes a separate selection form to identify the products and services that they are purchasing. Each separate selection form under the IPAA is treated as an individual contract and accounted for based on the respective performance obligations. Revenue allocated to the IP license is recognized at a point in time upon the later of the delivery of the IP or the beginning of the license period and revenue allocated to the maintenance is recognized over the maintenance term. Royalties are recognized as revenue in the quarter in which the applicable Cadence customer ships its products that incorporate Cadence IP. Payments for IP contracts are generally received upon delivery of the IP. Cadence customizes certain IP and revenue related to this customization is recognized as services revenue as described below. Services Revenue Recognition Revenue from service contracts is recognized over time, generally using costs incurred or hours expended to measure progress. 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. Payments for services are generally due upon milestones in the contract or upon consumption of the hourly resources.
Revenue Net of Taxes Collected	Revenue is recognized net of any taxes collected from customers that are subsequently remitted to governmental authorities.
Shipping and Handling Cost	Shipping and handling costs are considered fulfillment costs and are included in cost of product and maintenance in Cadence’s consolidated income statements.
Stock-Based Compensation	Stock-Based Compensation Cadence recognizes the cost of awards of equity instruments granted to employees in exchange for their services 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.
Advertising	Advertising Cadence expenses the costs of advertising as incurred. Total advertising expense, including marketing programs and events, was $8.4 million , $7.6 million and $7.4 million during fiscal 2019 , 2018 and 2017 , respectively, and is included in marketing and sales in the consolidated income statements.
Restructuring Charges	Restructuring Charges Cadence records personnel-related restructuring charges with 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, 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.
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 accounts for the United States global intangible low-taxed income as a period expense. 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. For additional discussion of income taxes, see Note 6 in the notes to the consolidated financial statements.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 28, 2019
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 Up to 32 years Furniture and fixtures 3-5 years Equipment 3-5 years

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 28, 2019
Debt Disclosure [Abstract]
Summary of debt outstanding	Cadence’s outstanding debt as of December 28, 2019 and December 29, 2018 was as follows: December 28, 2019 December 29, 2018 (In thousands) Principal Unamortized Discount Carrying Value Principal Unamortized Discount Carrying Value Revolving Credit Facility $ — $ — $ — $ 100,000 $ — $ 100,000 2024 Notes 350,000 (3,981 ) 346,019 350,000 (4,709 ) 345,291 Total outstanding debt $ 350,000 $ (3,981 ) $ 346,019 $ 450,000 $ (4,709 ) $ 445,291

Receivables, net (Tables)

Receivables, net (Tables)	12 Months Ended
	Dec. 28, 2019
Receivables [Abstract]
Current and long-term accounts receivable balances	Cadence’s current and long-term receivables balances as of December 28, 2019 and December 29, 2018 were as follows: As of December 28, December 29, (In thousands) Accounts receivable $ 179,250 $ 164,223 Unbilled accounts receivable 126,165 136,795 Long-term receivables 3,082 5,972 Total receivables 308,497 306,990 Less allowance for doubtful accounts (869 ) (3,936 ) Total receivables, net $ 307,628 $ 303,054
Allowance for Doubtful Accounts Receivable [Roll Forward]	Cadence’s provisions for losses on its accounts receivable during fiscal 2019 , 2018 and 2017 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 28, 2019 $ 3,936 $ 632 $ (3,699 ) $ 869 Year ended December 29, 2018 — 5,102 (1,166 ) 3,936 Year ended December 30, 2017 $ — $ 2,623 $ (2,623 ) $ —

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 28, 2019
Revenue from Contract with Customer [Abstract]
Revenue from External Customers by Products and Services	The following table shows the percentage of product and related maintenance revenue contributed by each of Cadence’s five product categories and services for fiscal 2019 and 2018 : 2019 2018 2017 Functional Verification, including Emulation and Prototyping Hardware* 24 % 24 % 22 % Digital IC Design and Signoff 29 % 29 % 29 % Custom IC Design and Simulation 25 % 26 % 27 % System Interconnect and Analysis 9 % 9 % 10 % IP 13 % 12 % 12 % Total 100 % 100 % 100 %
Contract Assets and Deferred Revenue	Cadence’s contract balances as of December 28, 2019 and December 29, 2018 were as follows: As of December 28, December 29, (In thousands) Contract assets $ 10,209 $ 10,055 Deferred revenue 428,883 401,174

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 28, 2019
Income Tax Disclosure [Abstract]
Income before provision for income taxes	Cadence’s income before provision (benefit) for income taxes included income from the United States and from foreign subsidiaries for fiscal 2019 , 2018 and 2017 , was as follows: 2019 2018 2017 (In thousands) United States $ 139,306 $ 58,963 $ 81,619 Foreign subsidiaries 339,662 317,427 233,427 Total income before provision (benefit) for income taxes $ 478,968 $ 376,390 $ 315,046
Components of income taxes provision	Cadence’s provision (benefit) for income taxes was comprised of the following items for fiscal 2019 , 2018 and 2017 : 2019 2018 2017 (In thousands) Current: Federal $ 15,282 $ 902 $ (2,193 ) State and local 2,716 (1,270 ) (2,097 ) Foreign 48,729 42,657 35,301 Total current 66,727 42,289 31,011 Deferred: Federal (9,001 ) (10,324 ) 76,494 State and local 6,593 886 5,571 Foreign (574,330 ) (2,238 ) (2,131 ) Total deferred (576,738 ) (11,676 ) 79,934 Total provision (benefit) for income taxes $ (510,011 ) $ 30,613 $ 110,945
Summary of income tax reconciliation	The provision for income taxes differs from the amount estimated by applying the United States statutory federal income tax rates of 21% to income before provision (benefit) for income taxes for fiscal 2019 and fiscal 2018 and of 35% to income before provision for income taxes for fiscal 2017 as follows: 2019 2018 2017 (In thousands) Provision computed at federal statutory income tax rate $ 100,583 $ 79,042 $ 110,266 State and local income tax, net of federal tax effect 23,221 15,540 5,867 Intercompany transfers of intangible property rights (575,618 ) — — Foreign income tax rate differential (37,786 ) (37,031 ) (65,296 ) Deemed repatriation transition tax — (1,409 ) 67,188 Remeasurement of U.S. deferred tax assets and liabilities — — 25,200 U.S. tax on foreign entities 57,225 28,846 — Stock-based compensation (29,785 ) (13,539 ) (24,455 ) Change in deferred tax asset valuation allowance 16,796 13,234 4,689 Tax credits (87,793 ) (72,815 ) (26,789 ) Non-deductible research and development expense 4,363 4,700 — Tax effects of intra-entity transfer of assets 895 79 (8,450 ) Domestic production activity deduction — — (2,474 ) Withholding taxes 15,865 11,535 11,225 Tax settlements, foreign 458 — 3,086 Increase (decrease) in unrecognized tax benefits (1,303 ) (1,545 ) 4,054 Other 2,868 3,976 6,834 Provision (benefit) for income taxes $ (510,011 ) $ 30,613 $ 110,945 Effective tax rate (106 )% 8 % 35 %
Components of deferred tax assets and liabilities	The components of deferred tax assets and liabilities consisted of the following as of December 28, 2019 and December 29, 2018 : As of December 28, December 29, (In thousands) Deferred tax assets: Tax credit carryforwards $ 206,008 $ 197,524 Reserves and accruals 47,562 43,522 Intangible assets 583,323 12,096 Capitalized research and development expense for income tax purposes 18,477 6,975 Operating loss carryforwards 6,201 15,347 Deferred income 16,704 6,580 Capital loss carryforwards 17,320 20,342 Stock-based compensation costs 15,097 15,329 Depreciation and amortization 8,721 8,759 Investments 2,459 2,900 Lease liability 25,016 — Total deferred tax assets 946,888 329,374 Valuation allowance (125,520 ) (108,724 ) Net deferred tax assets 821,368 220,650 Deferred tax liabilities: Intangible assets (24,907 ) (36,194 ) Undistributed foreign earnings (31,916 ) (27,627 ) ROU assets (25,016 ) — Other (8,350 ) (2,497 ) Total deferred tax liabilities (90,189 ) (66,318 ) Total net deferred tax assets $ 731,179 $ 154,332
Summary of operating loss carryforward	As of December 28, 2019 , Cadence’s operating loss carryforwards were as follows: Amount Expiration Periods (In thousands) Federal $ 1,059 from 2021 through 2029 California 28,820 from 2027 through 2036 Other states (tax effected, net of federal benefit) 1,853 from 2020 through 2038 Foreign (tax effected) 2,113 from 2025 through indefinite
Summary of tax credit carryforwards	As of December 28, 2019 , Cadence had tax credit carryforwards of: Amount Expiration Periods (In thousands) Federal* $ 100,128 from 2025 through 2039 California 72,897 indefinite Other states 11,286 from 2020 through indefinite Foreign 21,697 from 2035 through indefinite _____________ *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 28, 2019 , 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 2015 United States – California 2015 Ireland 2015
Unrecognized tax benefits roll forward	The changes in Cadence’s gross amount of unrecognized tax benefits during fiscal 2019 , 2018 and 2017 are as follows: 2019 2018 2017 (In thousands) Unrecognized tax benefits at the beginning of the fiscal year $ 101,857 $ 110,179 $ 98,540 Gross amount of the increases (decreases) in unrecognized tax benefits of tax positions taken during a prior year* (3,143 ) (4,183 ) 688 Gross amount of the increases in unrecognized tax benefits as a result of tax positions taken during the current year 8,951 2,370 13,141 Amount of decreases in unrecognized tax benefits relating to settlements with taxing authorities, including the utilization of tax attributes (380 ) — — Reductions to unrecognized tax benefits resulting from the lapse of the applicable statute of limitations (1,692 ) (5,179 ) (3,028 ) Effect of foreign currency translation 448 (1,330 ) 838 Unrecognized tax benefits at the end of the fiscal year $ 106,041 $ 101,857 $ 110,179 Total amounts of unrecognized tax benefits that, if upon resolution of the uncertain tax positions would reduce Cadence’s effective tax rate $ 61,527 $ 58,022 $ 63,108 _____________ * 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 2019 , 2018 and 2017 were as follows: 2019 2018 2017 (In thousands) Interest $ 490 $ 585 $ 1,865 Penalties 19 342 218 The total amounts of gross accrued interest and penalties recognized in the consolidated balance sheets as of December 28, 2019 and December 29, 2018 were as follows: As of December 28, December 29, (In thousands) Interest $ 3,500 $ 2,699 Penalties 12 10

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 28, 2019
Leases [Abstract]
Lease, Cost	Operating lease expense, which includes immaterial amounts of short-term leases, variable lease costs and sublease income, was as follows during fiscal 2019 , 2018 and 2017 : 2019 2018 2017 (In thousands) Operating lease expense $ 34,709 $ 33,717 $ 32,089
Schedule of supplemental balance sheet information related to leases	Additional activity related to Cadence’s leases during fiscal 2019 was as follows: 2019 Cash paid for amounts included in the measurement of operating lease liabilities $ 34,961 ROU assets obtained in exchange for operating lease obligations 38,090 ROU lease assets and lease liabilities for Cadence’s operating leases were recorded in the consolidated balance sheet as follows: As of December 28, 2019 (In thousands) Other assets $ 100,343 Accounts payable and accrued liabilities 25,558 Other long-term liabilities 84,782 Total lease liabilities $ 110,340 Weighted average remaining lease term (in years) 5.1 Weighted average discount rate 4.5 %
Table of lease liability maturity	Future lease payments included in the measurement of lease liabilities on the consolidated balance sheet as of December 28, 2019 , for the following five fiscal years and thereafter were as follows: Operating Leases (In thousands) 2020 $ 29,253 2021 29,185 2022 21,049 2023 15,474 2024 10,500 Thereafter 19,359 Total future lease payments 124,820 Less imputed interest (14,480 ) Total $ 110,340
Schedule of future minimum rental payments for operating leases	As of December 29, 2018 , future minimum lease payments, as defined under the previous lease accounting guidance of ASC Topic 840, under non-cancelable operating leases for the following five fiscal years and thereafter were as follows: Operating Leases (In thousands) 2019 $ 26,252 2020 23,130 2021 19,778 2022 14,243 2023 11,510 Thereafter 17,100 Total lease payments $ 112,013

Goodwill and Acquired Intangi_2

Goodwill and Acquired Intangibles (Tables)	12 Months Ended
	Dec. 28, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in the carrying amount of goodwill	The changes in the carrying amount of goodwill during fiscal 2019 and 2018 were as follows: Gross Carrying Amount (In thousands) Balance as of December 30, 2017 $ 666,009 Effect of foreign currency translation (3,737 ) Balance as of December 29, 2018 662,272 Effect of foreign currency translation (416 ) Balance as of December 28, 2019 $ 661,856
Acquired intangibles with finite lives (excluding goodwill), excluding intangibles fully amortized at end of prior fiscal year	Acquired intangibles as of December 28, 2019 were as follows, excluding intangibles that were fully amortized as of December 29, 2018 : Gross Carrying Amount Accumulated Amortization Acquired Intangibles, Net (In thousands) Existing technology $ 363,142 $ (245,902 ) $ 117,240 Agreements and relationships 146,395 (112,565 ) 33,830 Tradenames, trademarks and patents 7,600 (5,795 ) 1,805 Total acquired intangibles with definite lives 517,137 (364,262 ) 152,875 In-process technology 19,500 — 19,500 Total acquired intangibles $ 536,637 $ (364,262 ) $ 172,375 Acquired intangibles as of December 29, 2018 were as follows, excluding intangibles that were fully amortized as of December 30, 2017 : Gross Carrying Amount Accumulated Amortization Acquired Intangibles, Net (In thousands) Existing technology $ 330,500 $ (225,383 ) $ 105,117 Agreements and relationships 146,426 (100,211 ) 46,215 Tradenames, trademarks and patents 10,718 (8,093 ) 2,625 Total acquired intangibles with definite lives 487,644 (333,687 ) 153,957 In-process technology 71,500 — 71,500 Total acquired intangibles $ 559,144 $ (333,687 ) $ 225,457
Amortization of acquired intangibles	Amortization expense for fiscal 2019 , 2018 and 2017 , by consolidated income statement caption, was as follows: 2019 2018 2017 (In thousands) Cost of product and maintenance $ 40,951 $ 39,247 $ 41,781 Amortization of acquired intangibles 12,128 14,086 14,716 Total amortization of acquired intangibles $ 53,079 $ 53,333 $ 56,497
Estimated amortization expense	As of December 28, 2019 , the estimated amortization expense for intangible assets with definite lives was as follows for the following five fiscal years and thereafter: (In thousands) 2020 $ 49,419 2021 44,758 2022 26,453 2023 13,967 2024 12,618 Thereafter 5,660 Total estimated amortization expense $ 152,875

Stock Compensation Plans and _2

Stock Compensation Plans and Stock Based Compensation (Tables)	12 Months Ended
	Dec. 28, 2019
Share-based Payment Arrangement [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 2019 , 2018 and 2017 were as follows: 2019 2018 2017 (In thousands) Stock options $ 6,806 $ 5,581 $ 5,417 Restricted stock 164,078 153,348 117,797 ESPP 10,663 8,786 6,809 Total stock-based compensation expense $ 181,547 $ 167,715 $ 130,023 Income tax benefit $ 30,118 $ 32,830 $ 36,664
Stock based compensation expense and allocation by cost	Stock-based compensation expense is reflected in Cadence’s consolidated income statements during fiscal 2019 , 2018 and 2017 as follows: 2019 2018 2017 (In thousands) Cost of product and maintenance $ 2,759 $ 2,631 $ 2,218 Cost of services 3,510 3,714 3,232 Marketing and sales 39,088 34,665 26,838 Research and development 114,656 104,353 77,222 General and administrative 21,534 22,352 20,513 Total stock-based compensation expense $ 181,547 $ 167,715 $ 130,023
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 2019 , 2018 and 2017 were as follows: 2019 2018 2017 Dividend yield None None None Expected volatility 24.4 % 24.3 % 21.2 % Risk-free interest rate 2.47 % 2.54 % 2.01 % Expected term (in years) 4.8 4.8 4.8 Weighted-average fair value of options granted $ 14.58 $ 10.24 $ 6.86
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 2019 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 29, 2018 5,414 $ 20.51 Granted 595 56.57 Exercised (1,076 ) 13.52 Forfeited — — Options outstanding as of December 28, 2019 4,933 $ 26.38 3.4 $ 216,599 Options vested as of December 28, 2019 3,772 $ 21.00 2.8 $ 185,923
Intrinsic value of and cash received from options exercised	The total intrinsic value of and cash received from options exercised during fiscal 2019 , 2018 and 2017 was: 2019 2018 2017 (In thousands) Intrinsic value of options exercised $ 51,625 $ 31,109 $ 45,643 Cash received from options exercised 14,553 11,748 22,255
Stock-based compensation expense related to performance-based restricted stock grants	Stock-based compensation expense related to performance-based and market-based performance restricted stock grants for fiscal 2019 , 2018 and 2017 was as follows: 2019 2018 2017 (In thousands) Stock-based compensation expense related to performance-based restricted stock $ 12,640 $ 12,868 $ 8,224 Stock-based compensation expense related to market-based performance stock awards 7,019 2,300 1,979
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 2019 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 29, 2018 9,702 $ 32.67 Granted 4,028 53.11 Vested (4,799 ) 31.75 Forfeited (538 ) 39.66 Unvested shares as of December 28, 2019 8,393 $ 42.55 1.1 $ 589,937
Total fair value of restricted stock awards that vested	The total fair value realized by employees upon vesting of restricted stock during fiscal 2019 , 2018 and 2017 was: 2019 2018 2017 (In thousands) Fair value of restricted stock realized upon vesting $ 298,320 $ 232,099 $ 174,548
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 2019 , 2018 and 2017 were as follows: 2019 2018 2017 Dividend yield None None None Expected volatility 27.9 % 21.1 % 20.4 % Risk-free interest rate 2.23 % 2.05 % 0.92 % Expected term (in years) 0.5 0.5 0.5 Weighted-average fair value of options granted $ 14.37 $ 9.24 $ 6.64
Shares of common stock issued under Employee Stock Purchase Plan	Shares of common stock issued under the ESPP for fiscal 2019 , 2018 and 2017 were as follows: 2019 2018 2017 (In thousands, except per share amounts) Cadence shares purchased under the ESPP 988 892 1,270 Cash received for the purchase of shares under the ESPP $ 38,290 $ 29,160 $ 26,709 Weighted-average purchase price per share $ 38.74 $ 32.69 $ 21.04
Summary of common stock reserved for future issuance	As of December 28, 2019 , Cadence had reserved the following shares of authorized but unissued common stock for future issuance: Shares (In thousands) Employee equity incentive plans* 15,898 Employee stock purchase plans 6,039 Directors stock plans* 905 Total 22,842 _____________ *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 Repurchase Programs (Tabl

Stock Repurchase Programs (Tables)	12 Months Ended
	Dec. 28, 2019
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 2019 , 2018 and 2017 were as follows: 2019 2018 2017 (In thousands) Shares repurchased 4,841 5,934 2,495 Total cost of repurchased shares $ 306,148 $ 250,059 $ 100,025

Restructuring and Other Charg_2

Restructuring and Other Charges (Tables)	12 Months Ended
	Dec. 28, 2019
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 2019 , 2018 and 2017 : Severance and Benefits Excess Facilities Total (In thousands) 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 Restructuring and other charges, net 10,268 821 11,089 Cash payments (12,688 ) (192 ) (12,880 ) Effect of foreign currency translation 61 (30 ) 31 Balance, December 29, 2018 $ 11,176 $ 848 $ 12,024 Restructuring and other charges (credits), net 8,649 (28 ) 8,621 Cash payments (10,714 ) (420 ) (11,134 ) Effect of foreign currency translation 118 9 127 Balance, December 28, 2019 $ 9,229 $ 409 $ 9,638
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 28, 2019 (In thousands) Accounts payable and accrued liabilities $ 9,520 Other long-term liabilities 118 Total liabilities $ 9,638

Other Income, Net (Tables)

Other Income, Net (Tables)	12 Months Ended
	Dec. 28, 2019
Other Income and Expenses [Abstract]
Other income, net	Cadence’s other income, net, for fiscal 2019 , 2018 and 2017 was as follows: 2019 2018 2017 (In thousands) Interest income $ 9,509 $ 8,070 $ 3,879 Gains (losses) on marketable equity investments 713 (551 ) 520 Gains (losses) on non-marketable equity investments (4,802 ) 3,300 8,934 Gains (losses) on securities in NQDC trust 5,402 (1,471 ) 6,145 Losses on foreign exchange (4,111 ) (5,557 ) (2,920 ) Other income (loss), net (710 ) (471 ) 197 Total other income, net $ 6,001 $ 3,320 $ 16,755

Net Income Per Share (Tables)

Net Income Per Share (Tables)	12 Months Ended
	Dec. 28, 2019
Earnings Per Share [Abstract]
Basic and diluted net income per share	The calculations for basic and diluted net income per share for fiscal 2019 , 2018 and 2017 are as follows: 2019 2018 2017 (In thousands, except per share amounts) Net income $ 988,979 $ 345,777 $ 204,101 Weighted-average common shares used to calculate basic net income per share 273,239 273,729 272,097 Stock-based awards 7,276 7,415 8,124 Weighted-average common shares used to calculate diluted net income per share 280,515 281,144 280,221 Net income per share – basic $ 3.62 $ 1.26 $ 0.75 Net income per share – diluted $ 3.53 $ 1.23 $ 0.73
Potential shares of Cadence's common stock excluded	The following table presents shares of Cadence’s common stock outstanding for fiscal 2019 , 2018 and 2017 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: 2019 2018 2017 (In thousands) Long-term market-based awards 1,097 50 152 Options to purchase shares of common stock 359 637 303 Non-vested shares of restricted stock 727 290 77 Total potential common shares excluded 2,183 977 532

Balance Sheet Components (Table

Balance Sheet Components (Tables)	12 Months Ended
	Dec. 28, 2019
Disclosure Text Block Supplement [Abstract]
Summary of certain balance sheet components	A summary of certain balance sheet components as of December 28, 2019 and December 29, 2018 is as follows: As of December 28, December 29, (In thousands) Inventories: Raw materials $ 36,637 $ 16,392 Finished goods 19,165 11,770 Inventories $ 55,802 $ 28,162 Property, plant and equipment: Computer equipment and related software $ 554,874 $ 574,333 Buildings 126,795 126,927 Land 55,820 55,802 Leasehold, building and land improvements 106,456 108,529 Furniture and fixtures 23,425 27,087 Equipment 38,955 52,088 In-process capital assets 4,706 6,357 Total cost 911,031 951,123 Less: Accumulated depreciation and amortization (635,176 ) (698,493 ) Property, plant and equipment, net $ 275,855 $ 252,630 Other assets: Non-marketable investments $ 138,212 $ 118,734 ROU lease assets* 100,343 — Other long-term assets 106,874 103,575 Other assets $ 345,429 $ 222,309 Accounts payable and accrued liabilities: Payroll and payroll-related accruals $ 200,163 $ 192,887 Other accrued operating liabilities 116,745 63,639 Accounts payable and accrued liabilities $ 316,908 $ 256,526 Other long-term liabilities: Operating lease liabilities* $ 84,782 $ — Other accrued liabilities 77,739 77,262 Other long-term liabilities $ 162,521 $ 77,262

Fair Value (Tables)

Fair Value (Tables)	12 Months Ended
	Dec. 28, 2019
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 28, 2019 and December 29, 2018 : Fair Value Measurements as of December 28, 2019: Total Level 1 Level 2 Level 3 (In thousands) Assets Cash equivalents: Money market funds $ 445,942 $ 445,942 $ — $ — Marketable equity securities 4,600 4,600 — — Securities held in NQDC trust 34,096 34,096 — — Foreign currency exchange contracts 3,557 — 3,557 — Total Assets $ 488,195 $ 484,638 $ 3,557 $ — As of December 28, 2019, Cadence did not have any financial liabilities requiring a recurring fair value measurement. Fair Value Measurements as of December 29, 2018: Total Level 1 Level 2 Level 3 (In thousands) Assets Cash equivalents: Money market funds $ 327,841 $ 327,841 $ — $ — Marketable equity securities 3,887 3,887 — — Securities held in NQDC trust 27,767 27,767 — — Foreign currency exchange contracts 101 — 101 — Total Assets $ 359,596 $ 359,495 $ 101 $ — As of December 29, 2018, Cadence did not have any financial liabilities requiring a recurring fair value measurement.

Employee and Director Benefit_2

Employee and Director Benefit Plans (Tables)	12 Months Ended
	Dec. 28, 2019
Retirement Benefits [Abstract]
Contributions to defined contribution plans	Cadence’s total contributions made to these plans during fiscal 2019 , 2018 and 2017 were as follows: 2019 2018 2017 (In thousands) Contributions to defined contribution plans $ 25,269 $ 25,731 $ 26,010

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 28, 2019
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 28, 2019 , and December 29, 2018 : As of December 28, December 29, (In thousands) Foreign currency translation loss $ (29,503 ) $ (20,861 ) Changes in defined benefit plan liabilities (7,423 ) (3,919 ) Total accumulated other comprehensive loss $ (36,926 ) $ (24,780 )

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 28, 2019
Segment Reporting [Abstract]
Summary of revenue by geography	The following table presents a summary of revenue by geography for fiscal 2019 , 2018 and 2017 : 2019 2018 2017 (In thousands) Americas: United States $ 982,380 $ 924,644 $ 829,436 Other Americas 43,473 32,531 35,067 Total Americas 1,025,853 957,175 864,503 Asia: China 241,474 210,194 173,107 Other Asia 459,028 395,221 353,094 Total Asia 700,502 605,415 526,201 Europe, Middle East and Africa 433,314 406,877 385,705 Japan 176,650 168,555 166,623 Total $ 2,336,319 $ 2,138,022 $ 1,943,032
Summary of long-lived assets by geography	The following table presents a summary of property, plant and equipment assets by geography as of December 28, 2019 , December 29, 2018 and December 30, 2017 : As of December 28, December 29, December 30, (In thousands) Americas: United States $ 220,023 $ 200,025 $ 198,744 Other Americas 728 475 611 Total Americas 220,751 200,500 199,355 Asia: China 15,729 9,608 3,005 Other Asia 27,890 30,021 34,673 Total Asia 43,619 39,629 37,678 Europe, Middle East and Africa 10,474 11,784 13,615 Japan 1,011 717 694 Total $ 275,855 $ 252,630 $ 251,342

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - New Accounting Standards (Details Textual) - USD ($) $ in Thousands	Dec. 28, 2019		Dec. 30, 2018	Dec. 29, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets	$ 100,343	[1]		$ 0
Operating lease liability	$ 110,340
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets			$ 80,000
Operating lease liability			$ 80,000
[1]	* Cadence adopted Topic 842, the new accounting standard for leasing arrangements on December 30, 2018, the first day of fiscal 2019. For additional information regarding Cadence’s leases, see Note 7 in the notes to consolidated financial statements.

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Debt and Derivatives (Details)	12 Months Ended
	Dec. 28, 2019
Forward Contracts [Member]
Derivative [Line Items]
Maturity period of forward contracts	90 days

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Property, Plant and Equipment [Line Items]
Operating lease, weighted average remaining lease term	5 years 1 month 6 days
Capitalized Computer Software, For Internal Use, Additions	$ 2.4	$ 3.6	$ 2.2
Depreciation	$ 63.3	$ 60.4	$ 52.9
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]
Property, Plant and Equipment [Line Items]
Operating lease, weighted average remaining lease term	1 year
Lessee, Operating Lease, Lease Not yet Commenced, Renewal Term	1 year
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]
Property, Plant and Equipment [Line Items]
Operating lease, weighted average remaining lease term	11 years
Lessee, Operating Lease, Lease Not yet Commenced, Renewal Term	10 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 Accoun_7

Summary of Significant Accounting Policies - Deferred Sales Commissions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Revenue from Contract with Customer [Abstract]
Capitalized Contract Cost, Net	$ 31.6	$ 31.2
Capitalized Contract Cost, Amortization	$ 29.4	$ 26.5

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Long-lived Assets (Details) - Acquired Intangible Assets [Member]	12 Months Ended
	Dec. 28, 2019
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 Accoun_9

Summary of Significant Accounting Policies - Other (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 28, 2019	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Accounting Policies [Abstract]
Reserve for inventory		inventory in excess of 12-month demand
Percentage of Revenue Mix Recognizable Over Time	85.00%
Advertising Expense		$ 8.4	$ 7.6	$ 7.4
Percentage of likelihood of tax benefit being realized upon effective settlement of audit		50.00%

Debt (Details)

Debt (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018	Oct. 09, 2014
Debt Instrument [Line Items]
Principal	$ 350,000	$ 450,000
Unamortized Discount	(3,981)	(4,709)
Carrying Value	0	100,000
Carrying Value	346,019	345,291
Carrying Value	346,019	445,291
Senior Notes [Member] | Senior Notes Due 2024 [Member]
Debt Instrument [Line Items]
Principal	350,000	350,000	$ 350,000
Unamortized Discount	(3,981)	(4,709)	$ (1,400)
Carrying Value	346,019	345,291
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Principal	0	100,000
Carrying Value	$ 0	$ 100,000

Debt Credit Facility (Details T

Debt Credit Facility (Details Textual) $ in Millions	12 Months Ended
	Dec. 28, 2019USD ($)
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, current borrowing capacity	$ 350
Credit facility, additional borrowing capacity available	250
Credit facility, maximum borrowing capacity	$ 600
Credit facility, maturity date	Jan. 28, 2022
Minimum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, commitment fee percentage	0.15%
Maximum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, commitment fee percentage	0.30%
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
Revolving Credit Facility [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Credit facility, covenant, leverage ratio	2.75
Revolving Credit Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Credit facility, covenant, leverage ratio	3.25
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%
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%
Base Rate [Member] | Minimum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, interest rate spread	0.25%
Base Rate [Member] | Maximum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, interest rate spread	0.875%

Debt (Details Textual)

Debt (Details Textual) - USD ($) $ in Thousands	Oct. 09, 2014	Dec. 28, 2019	Dec. 29, 2018
Debt Instrument [Line Items]
Unamortized discount		$ 3,981	$ 4,709
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	3,981	$ 4,709
Debt issuance costs	$ 6,200
Fair value of notes payable		$ 378,400

Receivables, net (Details)

Receivables, net (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Current and long-term receivables balances
Accounts receivable	$ 179,250	$ 164,223
Unbilled accounts receivable	126,165	136,795
Long-term receivables	3,082	5,972
Total receivables	308,497	306,990
Less allowance for doubtful accounts	(869)	(3,936)	$ 0	$ 0
Total receivables, net	$ 307,628	$ 303,054

Receivables, net (Details Textu

Receivables, net (Details Textual) - Customer	Dec. 28, 2019	Dec. 29, 2018
Receivables and Allowances for Doubtful Accounts (Textual) [Abstract]
Number of customers with receivables balance greater than ten percent of total balance	0	1
Percent of receivables attributable to single customer	10.00%	11.00%

Receivables, Net (Details 1)

Receivables, Net (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 3,936	$ 0	$ 0
Charged to costs and expenses	632	5,102	2,623
Uncollectible accounts written off, net	(3,699)	(1,166)	(2,623)
Balance at end of period	$ 869	$ 3,936	$ 0

Revenue (Details Textual)

Revenue (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Revenue from Contract with Customer [Abstract]
Revenue recognized from deferred revenue during the period	$ 311.8	$ 284.3
Unsatisfied performance obligations	3,600	3,000
Remaining performance obligation, amount from non-cancellable IP access agreements	$ 205.7	60
Percent of remaining performance obligations, current	55.00%
Revenue recognized from performance obligation satisfied in previous periods	$ 40.4	$ 34.3

Revenue (Details)

Revenue (Details)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Revenue from External Customer [Line Items]
Percentage of product and maintenance revenue by product group	100.00%	100.00%	100.00%
Functional Verification, including Emulation and Prototyping Hardware [Member]
Revenue from External Customer [Line Items]
Percentage of product and maintenance revenue by product group	24.00%	24.00%	22.00%
Digital IC Design and Signoff [Member]
Revenue from External Customer [Line Items]
Percentage of product and maintenance revenue by product group	29.00%	29.00%	29.00%
Custom IC Design and Simulation [Member]
Revenue from External Customer [Line Items]
Percentage of product and maintenance revenue by product group	25.00%	26.00%	27.00%
System Interconnect and Analysis [Member]
Revenue from External Customer [Line Items]
Percentage of product and maintenance revenue by product group	9.00%	9.00%	10.00%
IP [Member]
Revenue from External Customer [Line Items]
Percentage of product and maintenance revenue by product group	13.00%	12.00%	12.00%

Revenue (Details 1)

Revenue (Details 1) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Revenue from Contract with Customer [Abstract]
Contract assets	$ 10,209	$ 10,055
Deferred revenue	$ 428,883	$ 401,174

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
United States	$ 139,306	$ 58,963	$ 81,619
Foreign subsidiaries	339,662	317,427	233,427
Income before provision (benefit) for income taxes	$ 478,968	$ 376,390	$ 315,046

Income Taxes (Details 1)

Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Current:
Federal	$ 15,282	$ 902	$ (2,193)
State and local	2,716	(1,270)	(2,097)
Foreign	48,729	42,657	35,301
Total current	66,727	42,289	31,011
Deferred:
Federal	(9,001)	(10,324)	76,494
State and local	6,593	886	5,571
Foreign	(574,330)	(2,238)	(2,131)
Total deferred	(576,738)	(11,676)	79,934
Total provision (benefit) for income taxes	$ (510,011)	$ 30,613	$ 110,945

Income Taxes (Details 2)

Income Taxes (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Provision computed at federal statutory income tax rate	$ 100,583	$ 79,042	$ 110,266
State and local income tax, net of federal tax effect	23,221	15,540	5,867
Intercompany transfers of intangible property rights	(575,618)	0	0
Foreign income tax rate differential	(37,786)	(37,031)	(65,296)
Deemed repatriation transition tax	0	(1,409)	67,188
Remeasurement of U.S. deferred tax assets and liabilities	0	0	25,200
U.S. tax on foreign entities	57,225	28,846	0
Stock-based compensation	(29,785)	(13,539)	(24,455)
Change in deferred tax asset valuation allowance	16,796	13,234	4,689
Tax credits	(87,793)	(72,815)	(26,789)
Non-deductible research and development expense	4,363	4,700	0
Tax effects of intra-entity transfer of assets	895	79	(8,450)
Domestic production activity deduction	0	0	(2,474)
Withholding taxes	15,865	11,535	11,225
Tax settlements, foreign	458	0	3,086
Increase (decrease) in unrecognized tax benefits	(1,303)	(1,545)	4,054
Other	2,868	3,976	6,834
Total provision (benefit) for income taxes	$ (510,011)	$ 30,613	$ 110,945
Effective Income Tax Rate Reconciliation, Percent	(106.00%)	8.00%	35.00%

Income Taxes (Details 3)

Income Taxes (Details 3) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Deferred Tax Assets:
Tax credit carryforwards	$ 206,008	$ 197,524
Reserves and accruals	47,562	43,522
Intangible assets	583,323	12,096
Capitalized research and development expense for income tax purposes	18,477	6,975
Operating loss carryforwards	6,201	15,347
Deferred income	16,704	6,580
Capital loss carryforwards	17,320	20,342
Stock-based compensation costs	15,097	15,329
Depreciation and amortization	8,721	8,759
Investments	2,459	2,900
Lease liability	25,016	0
Total deferred tax assets	946,888	329,374
Valuation allowance	(125,520)	(108,724)
Net deferred tax assets	821,368	220,650
Deferred Tax Liabilities:
Intangible assets	(24,907)	(36,194)
Undistributed foreign earnings	(31,916)	(27,627)
ROU assets	(25,016)	0
Other	(8,350)	(2,497)
Total deferred tax liabilities	(90,189)	(66,318)
Total net deferred tax assets	$ 731,179	$ 154,332

Income Taxes (Details 4)

Income Taxes (Details 4) $ in Thousands	Dec. 28, 2019USD ($)
United States federal [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carry forwards	$ 1,059
Tax credit carryforward	100,128	[1]
California State [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carry forwards	28,820
Tax credit carryforward	72,897
States other than California [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carry forwards	1,853
Tax credit carryforward	11,286
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carry forwards	2,113
Tax credit carryforward	$ 21,697
[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 5)

Income Taxes (Details 5) - USD ($) $ in Thousands		12 Months Ended
		Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Unrecognized Tax Benefits
Unrecognized tax benefits at the beginning of the fiscal year		$ 101,857	$ 110,179	$ 98,540
Gross amount of the decreases in unrecognized tax benefits of tax positions taken during a prior year	[1]	(3,143)	(4,183)
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	[1]			688
Gross amount of the increases in unrecognized tax benefits as a result of tax positions taken during the current year		8,951	2,370	13,141
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		(380)	0	0
Reductions to unrecognized tax benefits resulting from the lapse of the applicable statute of limitations		(1,692)	(5,179)	(3,028)
Unrecognized Tax Benefits, Increase Resulting from Foreign Currency Translation		448		838
Decrease resulting from foreign currency translation			(1,330)
Unrecognized tax benefits at the end of the fiscal year		106,041	101,857	110,179
Total amounts of unrecognized tax benefits that, if upon resolution of the uncertain tax positions would reduce Cadence's effective tax rate		61,527	58,022	63,108
Interest and penalties recognized in Income Statements
Interest		490	585	1,865
Penalties		19	342	$ 218
Interest and penalties recognized in Balance Sheets
Interest		3,500	2,699
Penalties		$ 12	$ 10
[1]	Includes unrecognized tax benefits of tax positions recorded in connection with acquisitions

Income Taxes (Details Textual)

Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 01, 2017	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Additional Income Taxes (Textual) [Abstract]
Deferred foreign income tax benefit		$ (575,618)	$ 0	$ 0
United States statutory federal income tax rate	35.00%	21.00%	21.00%	35.00%
Deemed repatriation transition tax				$ 67,200
Aggregate transition tax on foreign earnings resulting from the 2017 Tax Act			$ 65,800
Net deferred tax assets		$ 821,368	220,650
Valuation allowance		125,520	$ 108,724
Reasonably possible decrease in unrecognized tax benefits		$ 10,000

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Leases [Abstract]
Operating lease expense	$ 34,709	$ 33,717	$ 32,089

Leases (Details 1)

Leases (Details 1) $ in Thousands	12 Months Ended
	Dec. 28, 2019USD ($)
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 34,961
ROU assets obtained in exchange for operating lease obligations	$ 38,090

Leases (Details 2)

Leases (Details 2) - USD ($) $ in Thousands	Dec. 28, 2019		Dec. 29, 2018
Leases [Abstract]
Right-of-use assets	$ 100,343	[1]	$ 0
Operating lease, liability, current	25,558
Operating lease liabilities	84,782	[1]	$ 0
Total lease liabilities	$ 110,340
Operating lease, weighted average remaining lease term	5 years 1 month 6 days
Operating lease, weighted average discount rate,	4.50%
[1]	* Cadence adopted Topic 842, the new accounting standard for leasing arrangements on December 30, 2018, the first day of fiscal 2019. For additional information regarding Cadence’s leases, see Note 7 in the notes to consolidated financial statements.

Leases (Details 3)

Leases (Details 3) $ in Thousands	Dec. 28, 2019USD ($)
Leases [Abstract]
2020	$ 29,253
2021	29,185
2022	21,049
2023	15,474
2024	10,500
Thereafter	19,359
Total future lease payments	124,820
Less imputed interest	(14,480)
Total operating lease liability	$ 110,340

Leases (Details 4)

Leases (Details 4) $ in Thousands	Dec. 29, 2018USD ($)
Leases [Abstract]
2019	$ 26,252
2020	23,130
2021	19,778
2022	14,243
2023	11,510
Thereafter	17,100
Total lease payments	$ 112,013

Investments (Details Textual 1)

Investments (Details Textual 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Schedule of Equity Method Investments [Line Items]
Ownership percentage, equity method investment	16.00%
Book value, equity method investment	$ 136.3	$ 115.9
Income (Loss) from equity method investments	$ (6.9)

Investments Investments (Detail

Investments Investments (Details Textual 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Other Investment Not Readily Marketable [Line Items]
Non-marketable investments	$ 138,212	$ 118,734
Other equity investments not readily marketable [Member]
Other Investment Not Readily Marketable [Line Items]
Non-marketable investments	1,900	2,800
Net gains on equity securities without readily determinable fair value	2,100	3,300
Unrealized gains (losses) for the period that relate to equity securities without readily determinable fair values still held at the reporting date.	$ 900	$ 100

Acquisitions (Details Textual)

Acquisitions (Details Textual) $ in Thousands	12 Months Ended
	Dec. 28, 2019USD ($)	Dec. 29, 2018USD ($)	Dec. 30, 2017USD ($)
Business Acquisition [Line Items]
Cash paid in business combinations and asset acquisitions, net of cash acquired	$ 338	$ 0	$ 143,249
Transaction costs associated with acquisitions	$ 2,300	$ 600	$ 1,100
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)
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%
In-Process Technology [Member] | 2017 Acquisitions [Member]
Business Acquisition [Line Items]
In-process technology			$ 71,500

Goodwill and Acquired Intangi_3

Goodwill and Acquired Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Changes in the carrying amount of goodwill
Balance at beginning of period	$ 662,272	$ 666,009
Effect of foreign currency translation	(416)	(3,737)
Balance at end of period	$ 661,856	$ 662,272

Goodwill and Acquired Intangi_4

Goodwill and Acquired Intangibles (Details 1) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	$ 517,137	$ 487,644
Accumulated amortization	(364,262)	(333,687)
Acquired intangibles, net	152,875	153,957
In-process technology	19,500	71,500
Intangible Assets, Gross (Excluding Goodwill)	536,637	559,144
Intangible Assets, Net (Excluding Goodwill)	172,375	225,457
Existing technology [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	363,142	330,500
Accumulated amortization	(245,902)	(225,383)
Acquired intangibles, net	117,240	105,117
Agreements and relationships [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	146,395	146,426
Accumulated amortization	(112,565)	(100,211)
Acquired intangibles, net	33,830	46,215
Tradenames, trademarks and patents [Member]
Acquired intangibles with finite lives, excluding intangibles fully amortized at end of prior fiscal year
Gross carrying amount	7,600	10,718
Accumulated amortization	(5,795)	(8,093)
Acquired intangibles, net	$ 1,805	$ 2,625

Goodwill and Acquired Intangi_5

Goodwill and Acquired Intangibles (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Amortization of acquired intangibles
Cost of product and maintenance	$ 40,951	$ 39,247	$ 41,781
Amortization of acquired intangibles	12,128	14,086	14,716
Total amortization of acquired intangibles	$ 53,079	$ 53,333	$ 56,497

Goodwill and Acquired Intangi_6

Goodwill and Acquired Intangibles (Details 3) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Estimated amortization expense
2020	$ 49,419
2021	44,758
2022	26,453
2023	13,967
2024	12,618
Thereafter	5,660
Acquired intangibles, net	$ 152,875	$ 153,957

Goodwill and Acquired Intangi_7

Goodwill and Acquired Intangibles (Details Textual) $ in Millions	12 Months Ended
	Dec. 28, 2019USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
In-process technology transferred to existing technology	$ 52

Stock Compensation Plans and _3

Stock Compensation Plans and Stock Based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 181,547	$ 167,715	$ 130,023
Income tax benefit	30,118	32,830	36,664
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	6,806	5,581	5,417
Restricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	164,078	153,348	117,797
Employee stock purchase plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 10,663	$ 8,786	$ 6,809

Stock Compensation Plans and _4

Stock Compensation Plans and Stock Based Compensation (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Stock based compensation expense and allocation by cost
Stock-based compensation	$ 181,547	$ 167,715	$ 130,023
Cost of product and maintenance [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	2,759	2,631	2,218
Cost of services [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	3,510	3,714	3,232
Marketing and sales [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	39,088	34,665	26,838
Research and development [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	114,656	104,353	77,222
General and administrative [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	$ 21,534	$ 22,352	$ 20,513

Stock Compensation Plans and _5

Stock Compensation Plans and Stock Based Compensation (Details 2) - Stock options [Member] - $ / shares	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected volatility	24.40%	24.30%	21.20%
Risk-free interest rate	2.47%	2.54%	2.01%
Expected term (in years)	4 years 9 months 18 days	4 years 9 months 18 days	4 years 9 months 18 days
Weighted-average fair value of options granted	$ 14.58	$ 10.24	$ 6.86

Stock Compensation Plans and _6

Stock Compensation Plans and Stock Based Compensation (Details 3) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 28, 2019USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding beginning balance | shares	5,414
Granted | shares	595
Exercised | shares	(1,076)
Canceled and forfeited | shares	0
Options outstanding ending balance | shares	4,933
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	$ 20.51
Weighted-Average Exercise Price Granted | $ / shares	56.57
Weighted-Average Exercise Price Exercised | $ / shares	13.52
Weighted-Average Exercise Price Canceled and Forfeited | $ / shares	0
Weighted-Average Exercise Price, Options outstanding ending balance | $ / shares	$ 26.38
Summary of company stock option plans
Options vested as of December 28, 2019 | shares	3,772
Weighted Average Exercise Price, Options vested as of December 28, 2019 | $ / shares	$ 21
Weighted-Average Remaining Contractual Term, Options outstanding as of December 28, 2019	3 years 4 months 24 days
Weighted-Average Remaining Contractual Term, Options vested as of December 28, 2019	2 years 9 months 18 days
Aggregate Intrinsic Value, Options outstanding as of December 28, 2019 | $	$ 216,599
Aggregate Intrinsic Value, Options vested as of December 28, 2019 | $	$ 185,923

Stock Compensation Plans and _7

Stock Compensation Plans and Stock Based Compensation (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Intrinsic Value And Cash Received From Stock Options Exercised
Intrinsic value of options exercised	$ 51,625	$ 31,109	$ 45,643
Cash received from options exercised	$ 14,553	$ 11,748	$ 22,255

Stock Compensation Plans and _8

Stock Compensation Plans and Stock Based Compensation (Details 5) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 181,547	$ 167,715	$ 130,023
Stock-based compensation expense related to performance-based grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	12,640	12,868	8,224
Market-based performance restricted stock grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 7,019	$ 2,300	$ 1,979

Stock Compensation Plans and _9

Stock Compensation Plans and Stock Based Compensation (Details 6) - Restricted stock [Member] $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 28, 2019USD ($)$ / sharesshares
Summary of changes in restricted stock awards outstanding under Cadence's equity incentive plans
Unvested shares beginning balance | shares	9,702
Granted | shares	4,028
Vested | shares	(4,799)
Forfeited | shares	(538)
Unvested shares ending balance | shares	8,393
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	$ 32.67
Granted, Weighted-Average Grant date Fair Value | $ / shares	53.11
Vested, Weighted-Average Grant Date Fair Value | $ / shares	31.75
Forfeited, Weighted-Average Grant Date Fair Value | $ / shares	39.66
Unvested shares beginning balance, Weighted-Average Grant Date Fair Value | $ / shares	$ 42.55
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Unvested shares as of December 28, 2019, Weighted-Average Remaining Vesting Terms	1 year 1 month 6 days
Unvested shares as of December 28, 2019, Aggregate Intrinsic Value | $	$ 589,937

Stock Compensation Plans and_10

Stock Compensation Plans and Stock Based Compensation (Details 7) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Restricted stock [Member]
Fair value of restricted stock awards that vested
Fair value of restricted stock realized upon vesting	$ 298,320	$ 232,099	$ 174,548

Stock Compensation Plans and_11

Stock Compensation Plans and Stock Based Compensation (Details 8) - Purchase rights granted [Member] - $ / shares	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Weighted-average grant date fair value of purchase rights granted under ESPP and weighted-average assumptions used in model
Expected volatility	27.90%	21.10%	20.40%
Risk-free interest rate	2.23%	2.05%	0.92%
Expected term (in years)	15 days	15 days	15 days
Weighted-average fair value of options granted	$ 14.37	$ 9.24	$ 6.64

Stock Compensation Plans and_12

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. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Shares of common stock issued under employee stock purchase plan
Cadence shares purchased under the ESPP	988	892	1,270
Cash received for the purchase of shares under the ESPP	$ 38,290	$ 29,160	$ 26,709
Weighted-average purchase price per share	$ 38.74	$ 32.69	$ 21.04

Stock Compensation Plans and_13

Stock Compensation Plans and Stock Based Compensation (Details 10) shares in Thousands	Dec. 28, 2019shares
Common stock reserved for future issuance
Common stock reserved for future issuance	22,842
Employee equity incentive plans [Member]
Common stock reserved for future issuance
Common stock reserved for future issuance	15,898	[1]
Employee stock purchase plans [Member]
Common stock reserved for future issuance
Common stock reserved for future issuance	6,039
Directors stock option plans [Member]
Common stock reserved for future issuance
Common stock reserved for future issuance	905	[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_14

Stock Compensation Plans and Stock Based Compensation (Details Textual) - USD ($) shares in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 29, 2018	Jul. 31, 2018	Dec. 28, 2019
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			500
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			6,000
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%	10.00%
Maximum amount for which common stock can be purchased by employees in any calendar year	$ 10,000	$ 8,000
2014 Omnibus Equity Incentive Plan [Member]
Stock Compensation Plans (Textual) [Abstract]
Number of shares available for issuance under equity incentive plan			9,400
Expiration period from date of grant for options granted			7 years
Additional shares authorized and available for issuance under equity incentive plan			4,000
Stock options [Member]
Stock Compensation Plans (Textual) [Abstract]
Total unrecognized compensation expense, net of estimates forfeitures			$ 12,700,000
Weighted-average vesting period over which unrecognized compensation expense will be recognized			2 years 3 months 18 days
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	9,702		8,393
Total unrecognized compensation expense, net of estimates forfeitures			$ 287,700,000
Weighted-average vesting period over which unrecognized compensation expense will be recognized			2 years 1 month 6 days
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			2,200

Stock Repurchase Programs (Deta

Stock Repurchase Programs (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Equity [Abstract]
Treasury stock, shares repurchased	4,841	5,934	2,495
Treasury stock, total cost of repurchased shares	$ 306,148	$ 250,059	$ 100,025

Stock Repurchase Programs (De_2

Stock Repurchase Programs (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Equity [Abstract]
Remaining authorization for share repurchases	$ 369	$ 175
Stock repurchase program additional authorized repurchase amount	$ 500

Restructuring and Other Charg_3

Restructuring and Other Charges (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	$ 8,621	$ 11,089	$ 9,406
Restructuring reserve	9,638	$ 12,024	$ 13,784	$ 24,460
2019 restructuring plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	9,900
Restructuring reserve	9,100
Prior Restructuring Plans [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	(1,300)
Restructuring reserve	$ 500

Restructuring and Other Charg_4

Restructuring and Other Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Cadence's Restructuring Plans
Beginning Balance	$ 12,024	$ 13,784	$ 24,460
Restructuring and other charges (credits), net	8,621	11,089	9,406
Cash payments	(11,134)	(12,880)	(20,356)
Effect of foreign currency translation	127	31	274
Ending Balance	9,638	12,024	13,784
Severance and Benefits [Member]
Cadence's Restructuring Plans
Beginning Balance	11,176	13,535	24,402
Restructuring and other charges (credits), net	8,649	10,268	9,027
Cash payments	(10,714)	(12,688)	(20,170)
Effect of foreign currency translation	118	61	276
Ending Balance	9,229	11,176	13,535
Excess Facilities [Member]
Cadence's Restructuring Plans
Beginning Balance	848	249	58
Restructuring and other charges (credits), net	(28)	821	379
Cash payments	(420)	(192)	(186)
Effect of foreign currency translation	9	(30)	(2)
Ending Balance	$ 409	$ 848	$ 249

Restructuring and Other Charg_5

Restructuring and Other Charges (Details 1) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 9,638	$ 12,024	$ 13,784	$ 24,460
Accounts payable and accrued liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	9,520
Other long-term liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 118

Other Income, Net (Details)

Other Income, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Other Income, Net
Interest income	$ 9,509	$ 8,070	$ 3,879
Gains (losses) on marketable equity investments	713	(551)	520
Gains (losses) on non-marketable equity investments	(4,802)	3,300	8,934
Gains (losses) on securities in NQDC trust	5,402	(1,471)	6,145
Losses on foreign exchange	(4,111)	(5,557)	(2,920)
Other income (loss), net	(710)	(471)	197
Total other income, net	$ 6,001	$ 3,320	$ 16,755

Net Income Per Share (Details)

Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Earnings Per Share [Abstract]
Net income	$ 988,979	$ 345,777	$ 204,101
Weighted average common shares used to calculate basic net income per share	273,239	273,729	272,097
Stock-based awards	7,276	7,415	8,124
Weighted average common shares used to calculate diluted net income per share	280,515	281,144	280,221
Net income per share - basic (in usd per share)	$ 3.62	$ 1.26	$ 0.75
Net income per share - diluted (in usd per share)	$ 3.53	$ 1.23	$ 0.73

Net Income Per Share (Details 1

Net Income Per Share (Details 1) - shares shares in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	2,183	977	532
Long-term market-based awards
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	1,097	50	152
Options to purchase shares of common stock
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	359	637	303
Non-vested shares of restricted stock
Potential shares of Cadence's common stock excluded
Total potential common shares excluded	727	290	77

Balance Sheet Components (Detai

Balance Sheet Components (Details) - USD ($) $ in Thousands	Dec. 28, 2019		Dec. 29, 2018	Dec. 30, 2017
Inventories:
Raw materials	$ 36,637		$ 16,392
Finished goods	19,165		11,770
Inventories	55,802		28,162
Property, plant and equipment:
Computer equipment and related software	554,874		574,333
Buildings	126,795		126,927
Land	55,820		55,802
Leasehold, building and land improvements	106,456		108,529
Furniture and fixtures	23,425		27,087
Equipment	38,955		52,088
In-process capital assets	4,706		6,357
Total cost	911,031		951,123
Less: Accumulated depreciation and amortization	(635,176)		(698,493)
Property, plant and equipment, net	275,855		252,630	$ 251,342
Other assets:
Non-marketable investments	138,212		118,734
Other long-term assets	106,874		103,575
Right-of-use assets	100,343	[1]	0
Other assets	345,429		222,309
Accounts payable and accrued liabilities:
Payroll and payroll-related accruals	200,163		192,887
Other accrued operating liabilities	116,745		63,639
Accounts payable and accrued liabilities	316,908		256,526
Other long-term liabilities:
Operating lease liabilities	84,782	[1]	0
Other accrued liabilities	77,739		77,262
Other accrued liabilities	$ 162,521		$ 77,262
[1]	* Cadence adopted Topic 842, the new accounting standard for leasing arrangements on December 30, 2018, the first day of fiscal 2019. For additional information regarding Cadence’s leases, see Note 7 in the notes to consolidated financial statements.

Fair Value (Details)

Fair Value (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Assets
Marketable equity securities	$ 4,600	$ 3,887
Securities held in NQDC trust	34,096	27,767
Foreign currency exchange contracts	3,557	101
Total Assets	488,195	359,596
Money market funds [Member]
Assets
Money market funds	445,942	327,841
Fair Value Measurements, Level 1 [Member]
Assets
Marketable equity securities	4,600	3,887
Securities held in NQDC trust	34,096	27,767
Foreign currency exchange contracts	0	0
Total Assets	484,638	359,495
Fair Value Measurements, Level 1 [Member] | Money market funds [Member]
Assets
Money market funds	445,942	327,841
Fair Value Measurements, Level 2 [Member]
Assets
Marketable equity securities	0	0
Securities held in NQDC trust	0	0
Foreign currency exchange contracts	3,557	101
Total Assets	3,557	101
Fair Value Measurements, Level 2 [Member] | Money market funds [Member]
Assets
Money market funds	0	0
Fair Value Measurements, Level 3 [Member]
Assets
Marketable equity securities	0	0
Securities held in NQDC trust	0	0
Foreign currency exchange contracts	0	0
Total Assets	0	0
Fair Value Measurements, Level 3 [Member] | Money market funds [Member]
Assets
Money market funds	$ 0	$ 0

Commitments and Contingencies (

Commitments and Contingencies (Details Textual) $ in Millions	Dec. 28, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
Purchase obligations	$ 42.7

Employee and Director Benefit_3

Employee and Director Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Contributions to plan
Contributions to defined contribution plans	$ 25,269	$ 25,731	$ 26,010

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Accumulated other comprehensive loss
Foreign currency translation gain	$ (29,503)	$ (20,861)
Changes in defined benefit plan liabilities	(7,423)	(3,919)
Total accumulated other comprehensive loss	$ (36,926)	$ (24,780)

Segment Reporting (Details)

Segment Reporting (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Total revenue	$ 2,336,319	$ 2,138,022	$ 1,943,032
United States
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic areas, revenue from external customers	982,380	924,644	829,436
Other Americas [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic areas, revenue from external customers	43,473	32,531	35,067
Americas [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic areas, revenue from external customers	1,025,853	957,175	864,503
China [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic areas, revenue from external customers	241,474	210,194	173,107
Other Asia [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic areas, revenue from external customers	459,028	395,221	353,094
Asia [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic areas, revenue from external customers	700,502	605,415	526,201
Europe, Middle East and Africa [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic areas, revenue from external customers	433,314	406,877	385,705
Japan [Member]
Entity Wide Disclosure on Geographic Areas Revenue from External Customers
Geographic areas, revenue from external customers	$ 176,650	$ 168,555	$ 166,623

Segment Reporting (Details 1)

Segment Reporting (Details 1) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Summary of long-lived assets by geography
Total long-lived assets	$ 275,855	$ 252,630	$ 251,342
United States
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	220,023	200,025	198,744
Other Americas [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	728	475	611
Americas [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	220,751	200,500	199,355
China [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	15,729	9,608	3,005
Other Asia [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	27,890	30,021	34,673
Asia [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	43,619	39,629	37,678
Europe, Middle East and Africa [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	10,474	11,784	13,615
Japan [Member]
Summary of long-lived assets by geography
Long-Lived Assets in Individual Foreign Countries	$ 1,011	$ 717	$ 694

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event [Member] $ in Millions	1 Months Ended
	Feb. 06, 2020USD ($)
Subsequent Events [Line Items]
Payments to Acquire Businesses, Gross	$ 195
Long-term Purchase Commitment, Period	3 years