Operations and summary of significant accounting policies (Policies)	12 Months Ended
Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Principles of consolidation	Principles of consolidation The Consolidated Financial Statements include the accounts of National Instruments Corporation and its subsidiaries. All significant intercompany accounts and transactions have been eliminated.
Use of estimates	Use of estimates The preparation of our financial statements in conformity with U.S. generally accepted accounting principles requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses and related disclosures of contingent assets and liabilities. We base our estimates on past experience and other assumptions that we believe are reasonable under the circumstances, and we evaluate these estimates on an ongoing basis. Our critical accounting policies are those that affect our financial statements materially and involve difficult, subjective or complex judgments by management. Although these estimates are based on management's best knowledge of current events and actions that may impact the company in the future, actual results may be materially different from the estimates.
Cash and cash equivalents	Cash and cash equivalents Cash and cash equivalents include cash and highly liquid investments with maturities of three months or less at the date of acquisition.
Investments	Investments We value our available-for-sale debt instruments based on pricing from third-party pricing vendors, who may use quoted prices in active markets for identical assets (Level 1 inputs) or inputs other than quoted prices that are observable either directly or indirectly (Level 2 inputs) in determining fair value. We classify all of our fixed income available-for-sale securities as having Level 2 inputs. The valuation techniques used to measure the fair value of our financial instruments having Level 2 inputs were derived from non-binding market consensus prices that are corroborated by observable market data, quoted market prices for similar instruments, or pricing models, such as discounted cash flow techniques. We believe all of these sources reflect the credit risk associated with each of our available-for-sale debt investments. Short-term investments consist of available-for-sale debt securities issued by states of the U.S. and political subdivisions of the U.S., corporate debt securities and debt securities issued by U.S. government organizations and agencies. All short-term investments have contractual maturities of less than 60 months. Our investments in debt securities are classified as available-for-sale and accordingly are reported at fair value, with unrealized gains and losses reported as other comprehensive income, a component of stockholders’ equity. Unrealized losses are charged against income when a decline in fair value is determined to be other than temporary. Investments with maturities beyond one year are classified as short-term based on their highly liquid nature and because such marketable securities represent the investment of cash that is available for current operations. We follow the guidance provided by FASB ASC 320 to assess whether our investments with unrealized loss positions are other than temporarily impaired. Realized gains and losses and declines in value judged to be other than temporary are determined based on the specific identification method and are reported in other income (expense), net, in our Consolidated Statements of Income. In addition, we from time to time make equity investments in non-publicly traded companies. Equity investments in which we do not have control but have the ability to exercise significant influence over operating and financial policies, are accounted for using the equity method. Our proportionate share of income or loss is recorded in "Other income (expense), net "in the Consolidated Statement of Income. All other non-marketable equity investments do not have readily determinable fair values and are recorded at cost minus impairment, if any, plus or minus changes resulting from qualifying observable price changes. We periodically review our non-marketable equity investments for other-than-temporary declines in fair value and write-down specific investments to their fair values when we determine that an other-than-temporary decline has occurred. Our non-marketable equity investments were not material at December 31, 2019 and 2018.
Inventories, net	Inventories, net Inventories are stated at the lower-of-cost or net realizable value. Cost is determined using standard costs, which approximate the first-in first-out (“FIFO”) method. Cost includes the acquisition cost of purchased components, parts and subassemblies, in-bound freight costs, labor and overhead.
Property and equipment, net	Property and equipment, net Property and equipment are recorded at cost. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, which range from twenty to forty years for buildings, and three to seven years for purchased internal use software and for equipment which are each included in furniture and equipment.
Intangible assets, net	Intangible assets, net We capitalize costs related to the development and acquisition of certain software products. Capitalization of costs begins when technological feasibility has been established and ends when the product is available for general release to customers. Technological feasibility for our products is established when the product is available for beta release. Amortization is computed on an individual product basis for those products available for market and is recognized based on the product’s estimated economic life, generally three to six years. We use the services of outside counsel to search for, document, and apply for patents. Those costs, along with any filing or application fees, are capitalized. Costs related to patents which are abandoned are written off. Once a patent is granted, the patent costs are amortized ratably over the legal life of the patent, generally ten to seventeen years. Leasehold improvements are amortized over the shorter of the life of the lease or the asset. At each balance sheet date, the unamortized costs for all intangible assets are reviewed by management and reduced to net realizable value when necessary.
Goodwill	Goodwill The excess purchase price over the fair value of net assets acquired is recorded as goodwill. We have one operating segment and one reporting unit. Goodwill is tested for impairment on an annual basis, in the fourth quarter of each year, and between annual tests if indicators of potential impairment exist, using a fair-value-based approach based on the market capitalization of the reporting unit.
Concentrations of credit risk	The goal of our investment policy is to manage our investment portfolio to preserve principal and liquidity while maximizing the return on our investment portfolio through the full investment of available funds. We place our cash investments in instruments that meet credit quality standards, as specified in our corporate investment policy guidelines. These guidelines also limit the amount of credit exposure to any one issue, issuer or type of instrument. Our cash equivalents and short-term investments carried ratings from the major credit rating agencies that were in accordance with our corporate investment policy. Our investment policy allows investments in the following: government and federal agency obligations, repurchase agreements (“Repos”), certificates of deposit and time deposits, corporate obligations, medium term notes and deposit notes, commercial paper including asset-backed commercial paper (“ABCP”), puttable bonds, general obligation and revenue bonds, money market funds, taxable commercial paper, corporate notes/bonds, municipal notes, municipal obligations and tax exempt commercial paper. All such instruments must carry minimum ratings of A1/P1/F1, MIG1/VMIG1/SP1 and A2/A/A, as applicable, all of which are considered “investment grade”. Our investment policy for marketable securities requires that all securities mature in five years or less, with a weighted average maturity of no longer than 24 months with at least 10% maturing in 90 days or less. (See Note 3 – Short-term investments of Notes to Consolidated Financial Statements for further discussion and analysis of our investments). Concentration of credit risk with respect to trade accounts receivable is limited due to our large number of customers and their dispersion across many countries and industries.
Key supplier risk	Key supplier risk Our manufacturing processes use large volumes of high-quality components and subassemblies supplied by outside sources. Several of these items are available through sole or limited sources. Supply shortages or quality problems in connection with these key items could require us to procure items from replacement suppliers, which would cause significant delays in fulfillment of orders and likely result in additional costs. In order to manage this risk, we maintain safety stock of some of these single sourced components and subassemblies and perform regular assessments of a suppliers' performance, grading key suppliers in critical areas such as quality and “on-time” delivery.
Warranty reserve	Warranty reserve We offer a one-year limited warranty on most hardware products which is included in the terms of sale of such products. We also offer optional extended warranties on our hardware products for which the related revenue is recognized ratably over the warranty period. Provision is made for estimated future warranty costs at the time of the sale for the estimated costs that may be incurred under the limited warranty. Our estimate is based on historical experience and product sales during the period.
Loss contingencies	Loss contingencies We accrue for probable losses from contingencies including legal defense costs, on an undiscounted basis, when such costs are considered probable of being incurred and are reasonably estimable. We periodically evaluate available information, both internal and external, relative to such contingencies and adjust this accrual as necessary.
Advertising expense	Advertising expense We expense costs of advertising as incurred.
Foreign currency translation	Foreign currency translation The functional currency for our international sales operations is the applicable local currency. The assets and liabilities of these operations are translated at the rate of exchange in effect on the balance sheet date and sales and expenses are translated at average rates. The resulting gains or losses from translation are included in a separate component of other comprehensive income. Gains and losses resulting from re-measuring monetary asset and liability accounts that are denominated in a currency other than a subsidiary’s functional currency are included in net foreign exchange gain (loss) and are included in net income.
Foreign currency hedging instruments	Foreign currency hedging instruments All of our derivative instruments are recognized on the balance sheet at their fair value. We currently use foreign currency forward contracts to hedge our exposure to material foreign currency denominated receivables and forecasted foreign currency cash flows. On the date the derivative contract is entered into, we designate the derivative as a hedge of the variability of foreign currency cash flows to be received or paid (“cash flow” hedge) or as a hedge of our foreign denominated net receivable positions (“other derivatives”). Changes in the fair value of derivatives that are designated and qualify as cash flow hedges and that are deemed to be highly effective are recorded in other comprehensive income. These amounts are subsequently reclassified into earnings in the period during which the hedged transaction is realized. The gain or loss on the other derivatives as well as the offsetting gain or loss on the hedged item attributable to the hedged risk is recognized in current earnings under the line item “Net foreign exchange gain (loss)”. We do not enter into derivative contracts for speculative purposes. We formally document all relationships between hedging instruments and hedged items, as well as our risk-management objective and strategy for undertaking various hedge transactions at the inception of the hedge. This process includes linking all derivatives that are designated as cash flow hedges to specific forecasted transactions. We also formally assess, both at the hedge’s inception and on an ongoing basis, whether the hedging instruments are highly effective in offsetting changes in cash flows of hedged items. We prospectively discontinue hedge accounting if (1) it is determined that the derivative is no longer highly effective in offsetting changes in the fair value of a hedged item (forecasted transactions); or (2) the derivative is de-designated as a hedge instrument, because it is unlikely that a forecasted transaction will occur. When hedge accounting is discontinued, the derivative is sold, and the resulting gains and losses are recognized immediately in earnings.
Income taxes	Income taxes We account for income taxes under the asset and liability method. Deferred tax assets and liabilities are recognized for the expected tax consequences of temporary differences between the tax basis of assets and liabilities and their reported amounts. We account for GILTI in deferred taxes. Valuation allowances are established when necessary to reduce deferred tax assets to amounts which are more likely than not to be realized. Judgment is required in assessing the future tax consequences of events that have been recognized in our financial statements or tax returns. Variations in the actual outcome of these future tax consequences could materially impact our financial position or our results of operations. In estimating future tax consequences, all expected future events are considered other than enactments of changes in tax laws or rates. We account for uncertainty in income taxes recognized in our financial statements using prescribed recognition thresholds and measurement attributes for financial statement disclosure of tax positions taken or expected to be taken on our tax returns. Our policy is to recognize interest and penalties related to income tax matters in income tax expense.
Earnings per share	Earnings per share Basic earnings per share (“EPS”) is computed by dividing net income by the weighted average number of common shares outstanding during each period. Diluted EPS is computed by dividing net income by the weighted average number of common shares and common share equivalents outstanding (if dilutive) during each period. The number of common share equivalents, which include stock options and restricted stock units (“RSUs”), is computed using the treasury stock method.
Stock-based compensation	Stock-based compensation Stock-based compensation costs are based on the fair value on the date of grant for all restricted stock units ("RSUs") and on the date of enrollment for the employee stock purchase plan. We recognize compensation expense ratably over the requisite service period of the awards. PRSUs are RSU awards that vest based on a market condition. The market condition currently used is our stockholder return relative to the total stockholder return of the companies included in the Russell 2000 Index at the end of the three-year performance period. The fair values of RSUs, with service-based vesting conditions, are estimated using their market price on the date of grant. The fair values of rights under employee stock purchase plans are estimated using the Black-Scholes option-pricing model. The fair values of PRSUs are estimated using a Monte Carlo simulation. The determination of fair value of the PRSUs is affected by our stock price and a number of assumptions including the expected volatility, expected dividend yield and the risk-free interest rate. Our expected volatility at the date of grant was based on the historical volatilities of our stock and the companies included in the Russell 2000 Index over the performance period. Refer to Note 12 – Authorized shares of common and preferred stock and stock-based compensation plans for additional information on our equity-based compensation programs.
Comprehensive income	Comprehensive income Our comprehensive income is comprised of net income, foreign currency translation and unrealized gains and losses on forward contracts and securities available-for-sale.
Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements Leases In 2016, the FASB established Topic 842, Leases, by issuing new lease accounting guidance which supersedes ASC 840, Leases, and requires lessees to recognize leases on-balance sheet and disclose key information about leasing arrangements. Topic 842, as amended (the "new lease standard"), establishes a right-of-use ("ROU") model that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. We adopted the new lease standard on January 1, 2019 and used the effective date as our date of initial adoption. Consequently, financial information will not be updated, and the disclosures required under the new lease standard will not be provided for earlier periods. We have completed a qualitative and quantitative assessment of our lease portfolio, in which the new lease standard had a material impact on our consolidated balance sheet but did not have an impact on our consolidated income statement. Upon adoption, we recognized lease liabilities of approximately $52 million, with corresponding ROU assets of the same amount, based on the present value of the remaining minimum rental payments under current leasing standards for our existing operating leases. We reclassified approximately $19 million from "Property, plant and equipment, net" to "Operating lease right-of-use assets" related to prepaid leasehold land. The new lease standard provides a number of optional practical expedients in transition. We elected the "package of practical expedients", which permits us not to reassess under the new lease standard our prior conclusions about lease identification, lease classification and initial direct costs. The new lease standard also provides practical expedients for an entity's ongoing accounting. We elected the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, we will not recognize ROU assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases of those assets in transition. We also elected the practical expedient to not separate lease and non-lease components for our office leases. Other Recently Adopted Accounting Pronouncements We also adopted the following accounting pronouncement during 2019, which did not have a material impact on our financial statements: In January 2018, the FASB issued new guidance which gives entities the option to reclassify to retained earnings tax effects resulting from the Tax Act related to items that the FASB refers to as having been stranded in accumulated other comprehensive income ("OCI"). We adopted the new guidance effective January 1, 2019, and we did not elect the option to reclassify to retained earnings the tax effects resulting from the Tax Act that are stranded in accumulated OCI. The adoption of this new guidance did not have a material effect on our consolidated financial statements. Recently Issued Accounting Pronouncements In 2016, the FASB issued new guidance that requires credit losses on financial assets measured at amortized cost basis to be presented at the net amount expected to be collected, not based on incurred losses. Further, credit losses on available-for-sale debt securities should be recorded through an allowance for credit losses limited to the amount by which fair value is below amortized cost. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. This standard impacts our accounting for allowances for doubtful accounts, available-for-sale securities and other assets subject to credit risk. In preparation for the adoption of this standard, we will update our credit loss models as needed. We have completed our analysis of the impact of this guidance and the adoption of this standard will not have a material impact on our consolidated financial statements. In 2018, the FASB issued new guidance on a customer's accounting for implementation, set-up, and other upfront costs incurred in a cloud computing arrangement that is hosted by the vendor (i.e., a service contract). Under the new guidance, customers will apply the same criteria for capitalizing implementation costs as they would for an arrangement that has a software license. This standard is effective for annual reporting periods beginning after December 15, 2019, including interim reporting periods within those fiscal years. The adoption of this standard will not have a material impact on our consolidated financial statements. In 2019, the FASB issued new guidance to simplify the accounting for income taxes by removing certain exceptions to the general principles and also simplification of areas such as franchise taxes, step-up in tax basis goodwill, separate entity financial statements and interim recognition of enactment of tax laws or rate changes. The standard will be effective for our annual reporting periods beginning after December 15, 2020, including interim reporting periods within those fiscal years. We are evaluating the impact of adopting this new accounting guidance on our consolidated financial statements.

Operations and summary of significant accounting policies (Policies)

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The Consolidated Financial Statements include the accounts of National Instruments Corporation and its subsidiaries. All significant intercompany accounts and transactions have been eliminated.

Use of estimates

The preparation of our financial statements in conformity with U.S. generally accepted accounting principles requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses and related disclosures of contingent assets and liabilities. We base our estimates on past experience and other assumptions that we believe are reasonable under the circumstances, and we evaluate these estimates on an ongoing basis. Our critical accounting policies are those that affect our financial statements materially and involve difficult, subjective or complex judgments by management. Although these estimates are based on management's best knowledge of current events and actions that may impact the company in the future, actual results may be materially different from the estimates.

Cash and cash equivalents

Cash and cash equivalents include cash and highly liquid investments with maturities of three months or less at the date of acquisition.

Investments

We value our available-for-sale debt instruments based on pricing from third-party pricing vendors, who may use quoted prices in active markets for identical assets (Level 1 inputs) or inputs other than quoted prices that are observable either directly or indirectly (Level 2 inputs) in determining fair value. We classify all of our fixed income available-for-sale securities as having Level 2 inputs. The valuation techniques used to measure the fair value of our financial instruments having Level 2 inputs were derived from non-binding market consensus prices that are corroborated by observable market data, quoted market prices for similar instruments, or pricing models, such as discounted cash flow techniques. We believe all of these sources reflect the credit risk associated with each of our available-for-sale debt investments. Short-term investments consist of available-for-sale debt securities issued by states of the U.S. and political subdivisions of the U.S., corporate debt securities and debt securities issued by U.S. government organizations and agencies. All short-term investments have contractual maturities of less than 60 months.

Our investments in debt securities are classified as available-for-sale and accordingly are reported at fair value, with unrealized gains and losses reported as other comprehensive income, a component of stockholders’ equity. Unrealized losses are charged against income when a decline in fair value is determined to be other than temporary. Investments with maturities beyond one year are classified as short-term based on their highly liquid nature and because such marketable securities represent the investment of cash that is available for current operations.

We follow the guidance provided by FASB ASC 320 to assess whether our investments with unrealized loss positions are other than temporarily impaired. Realized gains and losses and declines in value judged to be other than temporary are determined based on the specific identification method and are reported in other income (expense), net, in our Consolidated Statements of Income. In addition, we from time to time make equity investments in non-publicly traded companies. Equity investments in which we do not have control but have the ability to exercise significant influence over operating and financial policies, are accounted for using the equity method. Our proportionate share of income or loss is recorded in "Other income (expense), net "in the Consolidated Statement of Income. All other non-marketable equity investments do not have readily determinable fair values and are recorded at cost minus impairment, if any, plus or minus changes resulting from qualifying observable price changes. We periodically review our non-marketable equity investments for other-than-temporary declines in fair value and write-down specific investments to their fair values when we determine that an other-than-temporary decline has occurred. Our non-marketable equity investments were not material at December 31, 2019 and 2018.

Inventories, net

Inventories are stated at the lower-of-cost or net realizable value. Cost is determined using standard costs, which approximate the first-in first-out (“FIFO”) method. Cost includes the acquisition cost of purchased components, parts and subassemblies, in-bound freight costs, labor and overhead.

Property and equipment, net

Property and equipment are recorded at cost. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, which range from twenty to forty years for buildings, and three to seven years for purchased internal use software and for equipment which are each included in furniture and equipment.

Intangible assets, net

We capitalize costs related to the development and acquisition of certain software products. Capitalization of costs begins when technological feasibility has been established and ends when the product is available for general release to customers. Technological feasibility for our products is established when the product is available for beta release. Amortization is computed on an individual product basis for those products available for market and is recognized based on the product’s estimated economic life, generally three to six years.

We use the services of outside counsel to search for, document, and apply for patents. Those costs, along with any filing or application fees, are capitalized. Costs related to patents which are abandoned are written off. Once a patent is granted, the patent costs are amortized ratably over the legal life of the patent, generally ten to seventeen years.

Leasehold improvements are amortized over the shorter of the life of the lease or the asset.

At each balance sheet date, the unamortized costs for all intangible assets are reviewed by management and reduced to net realizable value when necessary.

Goodwill

The excess purchase price over the fair value of net assets acquired is recorded as goodwill. We have one operating segment and one reporting unit. Goodwill is tested for impairment on an annual basis, in the fourth quarter of each year, and between annual tests if indicators of potential impairment exist, using a fair-value-based approach based on the market capitalization of the reporting unit.

Concentrations of credit risk

The goal of our investment policy is to manage our investment portfolio to preserve principal and liquidity while maximizing the return on our investment portfolio through the full investment of available funds. We place our cash investments in instruments that meet credit quality standards, as specified in our corporate investment policy guidelines. These guidelines also limit the amount of credit exposure to any one issue, issuer or type of instrument. Our cash equivalents and short-term investments carried ratings from the major credit rating agencies that were in accordance with our corporate investment policy. Our investment policy allows investments in the following: government and federal agency obligations, repurchase agreements (“Repos”), certificates of deposit and time deposits, corporate obligations, medium term notes and deposit notes, commercial paper including asset-backed commercial paper (“ABCP”), puttable bonds, general obligation and revenue bonds, money market funds, taxable commercial paper, corporate notes/bonds, municipal notes, municipal obligations and tax exempt commercial paper. All such instruments must carry minimum ratings of A1/P1/F1, MIG1/VMIG1/SP1 and A2/A/A, as applicable, all of which are considered “investment grade”. Our investment policy for marketable securities requires that all securities mature in five years or less, with a weighted average maturity of no longer than 24 months with at least 10% maturing in 90 days or less. (See Note 3 – Short-term investments of Notes to Consolidated Financial Statements for further discussion and analysis of our investments).

Concentration of credit risk with respect to trade accounts receivable is limited due to our large number of customers and their dispersion across many countries and industries.

Key supplier risk

Our manufacturing processes use large volumes of high-quality components and subassemblies supplied by outside sources. Several of these items are available through sole or limited sources. Supply shortages or quality problems in connection with these key items could require us to procure items from replacement suppliers, which would cause significant delays in fulfillment of orders and likely result in additional costs. In order to manage this risk, we maintain safety stock of some of these single sourced components and subassemblies and perform regular assessments of a suppliers' performance, grading key suppliers in critical areas such as quality and “on-time” delivery.

Warranty reserve

We offer a one-year limited warranty on most hardware products which is included in the terms of sale of such products. We also offer optional extended warranties on our hardware products for which the related revenue is recognized ratably over the warranty period. Provision is made for estimated future warranty costs at the time of the sale for the estimated costs that may be incurred under the limited warranty. Our estimate is based on historical experience and product sales during the period.

Loss contingencies

We accrue for probable losses from contingencies including legal defense costs, on an undiscounted basis, when such costs are considered probable of being incurred and are reasonably estimable. We periodically evaluate available information, both internal and external, relative to such contingencies and adjust this accrual as necessary.

Advertising expense

We expense costs of advertising as incurred.

Foreign currency translation

The functional currency for our international sales operations is the applicable local currency. The assets and liabilities of these operations are translated at the rate of exchange in effect on the balance sheet date and sales and expenses are translated at average rates. The resulting gains or losses from translation are included in a separate component of other comprehensive income. Gains and losses resulting from re-measuring monetary asset and liability accounts that are denominated in a currency other than a subsidiary’s functional currency are included in net foreign exchange gain (loss) and are included in net income.

Foreign currency hedging instruments

All of our derivative instruments are recognized on the balance sheet at their fair value. We currently use foreign currency forward contracts to hedge our exposure to material foreign currency denominated receivables and forecasted foreign currency cash flows.

On the date the derivative contract is entered into, we designate the derivative as a hedge of the variability of foreign currency cash flows to be received or paid (“cash flow” hedge) or as a hedge of our foreign denominated net receivable positions (“other derivatives”). Changes in the fair value of derivatives that are designated and qualify as cash flow hedges and that are deemed to be highly effective are recorded in other comprehensive income. These amounts are subsequently reclassified into earnings in the period during which the hedged transaction is realized. The gain or loss on the other derivatives as well as the offsetting gain or loss on the hedged item attributable to the hedged risk is recognized in current earnings under the line item “Net foreign exchange gain (loss)”. We do not enter into derivative contracts for speculative purposes.

We formally document all relationships between hedging instruments and hedged items, as well as our risk-management objective and strategy for undertaking various hedge transactions at the inception of the hedge. This process includes linking all derivatives that are designated as cash flow hedges to specific forecasted transactions. We also formally assess, both at the hedge’s inception and on an ongoing basis, whether the hedging instruments are highly effective in offsetting changes in cash flows of hedged items.

We prospectively discontinue hedge accounting if (1) it is determined that the derivative is no longer highly effective in offsetting changes in the fair value of a hedged item (forecasted transactions); or (2) the derivative is de-designated as a hedge instrument, because it is unlikely that a forecasted transaction will occur. When hedge accounting is discontinued, the derivative is sold, and the resulting gains and losses are recognized immediately in earnings.

Income taxes

We account for income taxes under the asset and liability method. Deferred tax assets and liabilities are recognized for the expected tax consequences of temporary differences between the tax basis of assets and liabilities and their reported amounts. We account for GILTI in deferred taxes. Valuation allowances are established when necessary to reduce deferred tax assets to amounts which are more likely than not to be realized. Judgment is required in assessing the future tax consequences of events that have been recognized in our financial statements or tax returns. Variations in the actual outcome of these future tax consequences could materially impact our financial position or our results of operations. In estimating future tax consequences, all expected future events are considered other than enactments of changes in tax laws or rates. We account for uncertainty in income taxes recognized in our financial statements using prescribed recognition thresholds and measurement attributes for financial statement disclosure of tax positions taken or expected to be taken on our tax returns. Our policy is to recognize interest and penalties related to income tax matters in income tax expense.

Earnings per share

Basic earnings per share (“EPS”) is computed by dividing net income by the weighted average number of common shares outstanding during each period. Diluted EPS is computed by dividing net income by the weighted average number of common shares and common share equivalents outstanding (if dilutive) during each period. The number of common share equivalents, which include stock options and restricted stock units (“RSUs”), is computed using the treasury stock method.

Stock-based compensation

Stock-based compensation costs are based on the fair value on the date of grant for all restricted stock units ("RSUs") and on the date of enrollment for the employee stock purchase plan. We recognize compensation expense ratably over the requisite service period of the awards. PRSUs are RSU awards that vest based on a market condition. The market condition currently used is our stockholder return relative to the total stockholder return of the companies included in the Russell 2000 Index at the end of the three-year performance period.

The fair values of RSUs, with service-based vesting conditions, are estimated using their market price on the date of grant. The fair values of rights under employee stock purchase plans are estimated using the Black-Scholes option-pricing model. The fair values of PRSUs are estimated using a Monte Carlo simulation. The determination of fair value of the PRSUs is affected by our stock price and a number of assumptions including the expected volatility, expected dividend yield and the risk-free interest rate. Our expected volatility at the date of grant was based on the historical volatilities of our stock and the companies included in the Russell 2000 Index over the performance period. Refer to Note 12 – Authorized shares of common and preferred stock and stock-based compensation plans for additional information on our equity-based compensation programs.

Comprehensive income

Our comprehensive income is comprised of net income, foreign currency translation and unrealized gains and losses on forward contracts and securities available-for-sale.

Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements

Recently Adopted Accounting Pronouncements

Leases

In 2016, the FASB established Topic 842, Leases, by issuing new lease accounting guidance which supersedes ASC 840, Leases, and requires lessees to recognize leases on-balance sheet and disclose key information about leasing arrangements. Topic 842, as amended (the "new lease standard"), establishes a right-of-use ("ROU") model that requires a lessee to recognize a ROU asset and lease liability on the balance sheet for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement.

We adopted the new lease standard on January 1, 2019 and used the effective date as our date of initial adoption. Consequently, financial information will not be updated, and the disclosures required under the new lease standard will not be provided for earlier periods.

We have completed a qualitative and quantitative assessment of our lease portfolio, in which the new lease standard had a material impact on our consolidated balance sheet but did not have an impact on our consolidated income statement. Upon adoption, we recognized lease liabilities of approximately $52 million, with corresponding ROU assets of the same amount, based on the present value of the remaining minimum rental payments under current leasing standards for our existing operating leases. We reclassified approximately $19 million from "Property, plant and equipment, net" to "Operating lease right-of-use assets" related to prepaid leasehold land.

The new lease standard provides a number of optional practical expedients in transition. We elected the "package of practical expedients", which permits us not to reassess under the new lease standard our prior conclusions about lease identification, lease classification and initial direct costs. The new lease standard also provides practical expedients for an entity's ongoing accounting. We elected the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, we will not recognize ROU assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases of those assets in transition. We also elected the practical expedient to not separate lease and non-lease components for our office leases.

Other Recently Adopted Accounting Pronouncements

We also adopted the following accounting pronouncement during 2019, which did not have a material impact on our financial statements:

In January 2018, the FASB issued new guidance which gives entities the option to reclassify to retained earnings tax effects resulting from the Tax Act related to items that the FASB refers to as having been stranded in accumulated other comprehensive income ("OCI"). We adopted the new guidance effective January 1, 2019, and we did not elect the option to reclassify to retained earnings the tax effects resulting from the Tax Act that are stranded in accumulated OCI. The adoption of this new guidance did not have a material effect on our consolidated financial statements.

Recently Issued Accounting Pronouncements

In 2016, the FASB issued new guidance that requires credit losses on financial assets measured at amortized cost basis to be presented at the net amount expected to be collected, not based on incurred losses. Further, credit losses on available-for-sale debt securities should be recorded through an allowance for credit losses limited to the amount by which fair value is below amortized cost. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. This standard impacts our accounting for allowances for doubtful accounts, available-for-sale securities and other assets subject to credit risk. In preparation for the adoption of this standard, we will update our credit loss models as needed. We have completed our analysis of the impact of this guidance and the adoption of this standard will not have a material impact on our consolidated financial statements.

In 2018, the FASB issued new guidance on a customer's accounting for implementation, set-up, and other upfront costs incurred in a cloud computing arrangement that is hosted by the vendor (i.e., a service contract). Under the new guidance, customers will apply the same criteria for capitalizing implementation costs as they would for an arrangement that has a software license. This standard is effective for annual reporting periods beginning after December 15, 2019, including interim reporting periods within those fiscal years. The adoption of this standard will not have a material impact on our consolidated financial statements.

In 2019, the FASB issued new guidance to simplify the accounting for income taxes by removing certain exceptions to the general principles and also simplification of areas such as franchise taxes, step-up in tax basis goodwill, separate entity financial statements and interim recognition of enactment of tax laws or rate changes. The standard will be effective for our annual reporting periods beginning after December 15, 2020, including interim reporting periods within those fiscal years. We are evaluating the impact of adopting this new accounting guidance on our consolidated financial statements.