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Operating expenses (Schedule of Selling, General and Administrative Expenses) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Operating expenses |  |
Wages, salaries and benefits | $ 78,796 | $ 60,088
Share-based compensation expense | 3,778 | 2,407
Buildings, facilities and technology expenses | 17,343 | 15,591
Travel, advertising and promotion expenses | 5,162 | 10,269
Professional fees | 5,032 | 4,447
Other SG&A expenses | 5,967 | 5,583
Total selling, general and administrative expenses | $ 116,078 | $ 98,385

X
- Definition Amount of rent and costs of keeping the property in good condition but that do not appreciably prolong the life or increase the value of the property not directly related to revenues. + References No definition available. + Details
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X
- Definition Amount of expense for equity-based compensation. + References No definition available. + Details
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- Definition Amount of expense for salary, wage, and employee benefit. + References No definition available. + Details
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- Definition Travel, advertising, and promotion expense that are not directly related to services rendered by an entity during the reporting. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Amount of selling, general and administrative expense classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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- Definition A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07.2(a),(b),(c),(d)) -URI http://asc.fasb.org/extlink&oid=120401555&loc=SL114874292-224272 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 220 -Section 45 -Paragraph 3 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=118262090&loc=SL114874205-224268 + Details
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X
- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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