Basis of presentation (Policies)	6 Months Ended
Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting, Policy	Basis of presentation The accompanying unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto for the fiscal year ended December 31, 2019, included in our Annual Report on Form 10-K filed with the Securities and Exchange Commission ("SEC") on February 20, 2020 (the "Form 10-K"). In our opinion, the accompanying consolidated financial statements reflect all adjustments (consisting only of normal recurring items) considered necessary to present fairly our financial position at June 30, 2020 and December 31, 2019, the results of our operations and comprehensive income for three and six months ended June 30, 2020 and 2019, our cash flows for the six months ended June 30, 2020 and 2019 and our statement of stockholders' equity for the three and six months ended June 30, 2020 and 2019. Our operating results for the three and six months ended June 30, 2020 are not necessarily indicative of the results that may be expected for the year ending December 31, 2020. These financial statements have been prepared in accordance with accounting principles generally accepted in the United States. Reclassifications As discussed below, certain prior period amounts have been reclassified to conform to the current period presentation. The reclassifications had no impact on our previously reported net income or cash flows: •We previously included net sales attributable to our operations in India within the EMEIA region in Note 2 - Revenue of Notes to Consolidated Financial Statements. In the second quarter of 2020, we began including these amounts within the APAC (Australia, India, New Zealand, Southeast Asia, China, South Korea and Japan) geographic region, to reflect recent changes within our organizational structure. We have recast historical comparative information to conform to the June 30, 2020 presentation. Refer to Note 2 - Revenue of Notes to Consolidated Financial Statements for our revenue disaggregated by geographic region which now include the Americas (United States, Canada and Latin America), EMEA (Europe, Middle East, and Africa) and APAC. •We previously presented “Interest income”, "Net foreign exchange gain (loss)", and "Other income (loss)" separately on the consolidated statements of income. In the second quarter of 2020, we began presenting these amounts within “Other (expense) income” in the consolidated statements of income for all periods presented. Refer to "Other (expense) income" in Note 1 - Basis of Presentation of Notes to Consolidated Financial Statements for additional information on the amounts that comprise "Other (expense) income". Disclosures about Acquired and Disposed Businesses In May 2020, the SEC adopted Release No. 33-10786 "Amendments to Financial Disclosures about Acquired and Disposed Businesses" ("Release No. 33-10786") which includes amendments to certain of its rules and forms related to the disclosure of financial information regarding acquired or disposed businesses. Among other changes, the amendments impact SEC rules relating to (1) the definition of “significant” subsidiaries, (2) requirements to provide financial statements for “significant” acquisitions, and (3) revisions to the formulation and usage of pro forma financial information. Release No. 33-10786 is effective on January 1, 2021, however, voluntary early adoption is permitted as long as all amendments are adopted in their entirety. We elected to early adopt all provisions of Release No. 33-10786 during the second quarter of 2020. Summary of Significant Accounting Policies As discussed above, we adopted the new expected credit loss standard as of January 1, 2020. There were no other significant changes in our accounting policies during the three and six months ended June 30, 2020 compared to the significant accounting policies described in our Form 10-K.
Earnings Per Share	Earnings Per ShareBasic 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 includes restricted stock units ("RSUs"), is computed using the treasury stock method.
Other Recently Adopted Accounting Pronouncements and Recent Accounting Guidance Not Yet Adopted	Recently Adopted Accounting Pronouncements Current Expected Credit Losses ("CECL") In June 2016, the Financial Accounting Standards Board ("FASB") issued ASU No. 2016-13, "Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." The ASU replaces the incurred-loss impairment methodology and requires immediate recognition of estimated credit losses expected to occur for most financial assets, including trade receivables. Credit losses on available-for-sale debt securities with unrealized losses will be recognized as allowances for credit losses limited to the amount by which fair value is below amortized cost. We adopted the new standard on January 1, 2020 and the impact of the adoption was not material to our consolidated financial statements as credit losses are not expected to be significant based on historical collection trends, the financial condition of payment partners, and external market factors. We will continue to actively monitor the impact of the recent coronavirus (COVID-19) pandemic on expected credit losses.
Software to be Sold, Leased, or Otherwise Marketed, Policy	Implementation Costs Incurred in a Cloud Computing Arrangement In August 2018, the FASB issued ASU 2018-15, “Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract,” which clarifies the accounting for implementation costs in cloud computing arrangements. The new standard aligns the treatment of implementation costs incurred by customers in cloud computing arrangements that are service contracts with the treatment of similar costs incurred to develop or obtain internal-use software. Under the new standard, implementation costs are deferred and presented in the same financial statement caption on the condensed consolidated balance sheet as a prepayment of related arrangement fees. The deferred costs are recognized over the term of the arrangement in the same financial statement caption in the condensed consolidated income statement as the related fees of the arrangement. We adopted the new standard on January 1, 2020. The new standard did not have a material impact on our consolidated financial statements and related disclosures.
Fair Value Measurement, Policy	Fair Value Measurements In August 2018, the FASB issued ASU 2018-13, “Disclosure Framework — Changes to the Disclosure Requirements for Fair Value Measurement,” which modifies the disclosure requirements on fair value measurements. We adopted the new standard on January 1, 2020. The new standard did not have a material impact on our consolidated financial statements and related disclosures.
Income Tax, Policy	Income Taxes In December 2019, the FASB issued ASU 2019-12, “Income Taxes — Simplifying the Accounting for Income Taxes (Topic 740),” which simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments in this ASU also improve consistency and simplify other areas of Topic 740 by clarifying and amending existing guidance. The amendments in this ASU will be applied using different approaches depending on what the specific amendment relates to and, for public entities, are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. An entity is permitted to early adopt the guidance, and we early adopted ASU 2019-12 as of January 1, 2020. The adoption did not have a material impact on our consolidated financial statements and related disclosures.
Revenue	Revenue Recognition Revenue is recognized upon transfer of control of the promised products or services to customers in an amount that reflects the consideration we expect to receive in exchange for those products or services. We enter into contracts that can include various combinations of our products or services, which are generally capable of being distinct and accounted for as separate performance obligations. Revenue is recognized net of allowances for returns and any taxes collected from customers, which are subsequently remitted to governmental authorities. Disaggregation of Revenues We disaggregate revenue from contracts with customers based on the timing of transfer of goods or services to customers (point-in-time or over time) and geographic region based on the billing location of the customer. We previously included net sales attributable to our operations in India within the EMEIA region. In the second quarter of 2020, we began including these amounts within the APAC geographic region, to reflect recent changes within our organizational structure. We have recast historical comparative information to conform to the June 30, 2020 presentation. The geographic regions are now presented as the Americas, EMEA and APAC to reflect this change. Information about Contract Balances Amounts collected in advance of services being provided are accounted for as deferred revenue. Nearly all of our deferred revenue balance is related to extended hardware and software maintenance contracts. Payment terms and conditions vary by contract type, although payment is typically due within 30 to 90 days of contract inception. In instances where the timing of revenue recognition differs from the timing of invoicing, we have determined our contracts generally do not include a significant financing component. The primary purpose of our invoicing terms is to provide customers with simplified and predictable ways of purchasing our products and services, not to receive financing from our customers, such as invoicing at the beginning of a subscription term with a portion of the revenue recognized ratably over the contract period, or to provide customers with financing, such as multi-year on-premises licenses that are invoiced annually with revenue recognized upfront. Assets Recognized from the Costs to Obtain a Contract with a CustomerWe recognize an asset for the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one year. We have determined that certain sales incentive programs meet the requirements to be capitalized. Capitalized incremental costs related to initial contracts and renewals are amortized over the same period because the commissions paid on both the initial contract and renewals are commensurate with one another. Total capitalized costs to obtain a contract were not material during the periods presented and are included in other long-term assets on our consolidated balance sheets.

Basis of presentation (Policies)

6 Months Ended

Jun. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of presentation

The accompanying unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto for the fiscal year ended December 31, 2019, included in our Annual Report on Form 10-K filed with the Securities and Exchange Commission ("SEC") on February 20, 2020 (the "Form 10-K"). In our opinion, the accompanying consolidated financial statements reflect all adjustments (consisting only of normal recurring items) considered necessary to present fairly our financial position at June 30, 2020 and December 31, 2019, the results of our operations and comprehensive income for three and six months ended June 30, 2020 and 2019, our cash flows for the six months ended June 30, 2020 and 2019 and our statement of stockholders' equity for the three and six months ended June 30, 2020 and 2019. Our operating results for the three and six months ended June 30, 2020 are not necessarily indicative of the results that may be expected for the year ending December 31, 2020. These financial statements have been prepared in accordance with accounting principles generally accepted in the United States.

Reclassifications

As discussed below, certain prior period amounts have been reclassified to conform to the current period presentation. The reclassifications had no impact on our previously reported net income or cash flows:

•We previously included net sales attributable to our operations in India within the EMEIA region in Note 2 - Revenue of Notes to Consolidated Financial Statements. In the second quarter of 2020, we began including these amounts within the APAC (Australia, India, New Zealand, Southeast Asia, China, South Korea and Japan) geographic region, to reflect recent changes within our organizational structure. We have recast historical comparative information to conform to the June 30, 2020 presentation. Refer to Note 2 - Revenue of Notes to Consolidated Financial Statements for our revenue disaggregated by geographic region which now include the Americas (United States, Canada and Latin America), EMEA (Europe, Middle East, and Africa) and APAC.

•We previously presented “Interest income”, "Net foreign exchange gain (loss)", and "Other income (loss)" separately on the consolidated statements of income. In the second quarter of 2020, we began presenting these amounts within “Other (expense) income” in the consolidated statements of income for all periods presented. Refer to "Other (expense) income" in Note 1 - Basis of Presentation of Notes to Consolidated Financial Statements for additional information on the amounts that comprise "Other (expense) income".

Disclosures about Acquired and Disposed Businesses

In May 2020, the SEC adopted Release No. 33-10786 "Amendments to Financial Disclosures about Acquired and Disposed Businesses" ("Release No. 33-10786") which includes amendments to certain of its rules and forms related to the disclosure of financial information regarding acquired or disposed businesses. Among other changes, the amendments impact SEC rules relating to (1) the definition of “significant” subsidiaries, (2) requirements to provide financial statements for “significant” acquisitions, and (3) revisions to the formulation and usage of pro forma financial information. Release No. 33-10786 is effective on January 1, 2021, however, voluntary early adoption is permitted as long as all amendments are adopted in their entirety. We elected to early adopt all provisions of Release No. 33-10786 during the second quarter of 2020.

Summary of Significant Accounting Policies

As discussed above, we adopted the new expected credit loss standard as of January 1, 2020. There were no other significant changes in our accounting policies during the three and six months ended June 30, 2020 compared to the significant accounting policies described in our Form 10-K.

Earnings Per Share

Earnings Per ShareBasic 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 includes restricted stock units ("RSUs"), is computed using the treasury stock method.

Other Recently Adopted Accounting Pronouncements and Recent Accounting Guidance Not Yet Adopted

Recently Adopted Accounting Pronouncements

Current Expected Credit Losses ("CECL")

In June 2016, the Financial Accounting Standards Board ("FASB") issued ASU No. 2016-13, "Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." The ASU replaces the incurred-loss impairment methodology and requires immediate recognition of estimated credit losses expected to occur for most financial assets, including trade receivables. Credit losses on available-for-sale debt securities with unrealized losses will be recognized as allowances for credit losses limited to the amount by which fair value is below amortized cost. We adopted the new standard on January 1, 2020 and the impact of the adoption was not material to our consolidated financial statements as credit losses are not expected to be significant based on historical collection trends, the financial condition of payment partners, and external market factors. We will continue to actively monitor the impact of the recent coronavirus (COVID-19) pandemic on expected credit losses.

Software to be Sold, Leased, or Otherwise Marketed, Policy

Implementation Costs Incurred in a Cloud Computing Arrangement

In August 2018, the FASB issued ASU 2018-15, “Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract,” which clarifies the accounting for implementation costs in cloud computing arrangements. The new standard aligns the treatment of implementation costs incurred by customers in cloud computing arrangements that are service contracts with the treatment of similar costs incurred to develop or obtain internal-use software. Under the new standard, implementation costs are deferred and presented in the same financial statement caption on the condensed consolidated balance sheet as a prepayment of related arrangement fees. The deferred costs are recognized over the term of the arrangement in the same financial statement caption in the condensed consolidated income statement as the related fees of the arrangement. We adopted the new standard on January 1, 2020. The new standard did not have a material impact on our consolidated financial statements and related disclosures.

Fair Value Measurement, Policy

Fair Value Measurements

In August 2018, the FASB issued ASU 2018-13, “Disclosure Framework — Changes to the Disclosure Requirements for Fair Value Measurement,” which modifies the disclosure requirements on fair value measurements. We adopted the new standard on January 1, 2020. The new standard did not have a material impact on our consolidated financial statements and related disclosures.

Income Tax, Policy

Income Taxes

In December 2019, the FASB issued ASU 2019-12, “Income Taxes — Simplifying the Accounting for Income Taxes (Topic 740),” which simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments in this ASU also improve consistency and simplify other areas of Topic 740 by clarifying and amending existing guidance. The amendments in this ASU will be applied using different approaches depending on what the specific amendment relates to and, for public entities, are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. An entity is permitted to early adopt the guidance, and we early adopted ASU 2019-12 as of January 1, 2020. The adoption did not have a material impact on our consolidated financial statements and related disclosures.

Revenue

Revenue Recognition

Revenue is recognized upon transfer of control of the promised products or services to customers in an amount that reflects the consideration we expect to receive in exchange for those products or services. We enter into contracts that can include various combinations of our products or services, which are generally capable of being distinct and accounted for as separate performance obligations. Revenue is recognized net of allowances for returns and any taxes collected from customers, which are subsequently remitted to governmental authorities.

Disaggregation of Revenues

We disaggregate revenue from contracts with customers based on the timing of transfer of goods or services to customers (point-in-time or over time) and geographic region based on the billing location of the customer. We previously included net sales attributable to our operations in India within the EMEIA region. In the second quarter of 2020, we began including these amounts within the APAC geographic region, to reflect recent changes within our organizational structure. We have recast historical comparative information to conform to the June 30, 2020 presentation. The geographic regions are now presented as the Americas, EMEA and APAC to reflect this change.

Information about Contract Balances

Amounts collected in advance of services being provided are accounted for as deferred revenue. Nearly all of our deferred revenue balance is related to extended hardware and software maintenance contracts. Payment terms and conditions vary by contract type, although payment is typically due within 30 to 90 days of contract inception. In instances where the timing of revenue recognition differs from the timing of invoicing, we have determined our contracts generally do not include a significant financing component. The primary purpose of our invoicing terms is to provide customers with simplified and predictable ways of purchasing our products and services, not to receive financing from our customers, such as invoicing at the beginning of a subscription term with a portion of the revenue recognized ratably over the contract period, or to provide customers with financing, such as multi-year on-premises licenses that are invoiced annually with revenue recognized upfront.

Assets Recognized from the Costs to Obtain a Contract with a CustomerWe recognize an asset for the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one year. We have determined that certain sales incentive programs meet the requirements to be capitalized. Capitalized incremental costs related to initial contracts and renewals are amortized over the same period because the commissions paid on both the initial contract and renewals are commensurate with one another. Total capitalized costs to obtain a contract were not material during the periods presented and are included in other long-term assets on our consolidated balance sheets.