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Restructuring and integration expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Restructuring and integration expense [Line Items] |  |  |  |
Restructuring and integration expense | $ 11,979 | $ 20,382 | $ 27,191 | $ 38,865
Total cost of revenue [Member] |  |  |  |
Restructuring and integration expense [Line Items] |  |  |  |
Restructuring and integration expense | 615 | 28 | 1,514 | 857
Operating expenses [Member] |  |  |  |
Restructuring and integration expense [Line Items] |  |  |  |
Restructuring and integration expense | 11,364 | 20,354 | 25,677 | 38,008
External consulting fees [Member] |  |  |  |
Restructuring and integration expense [Line Items] |  |  |  |
Restructuring and integration expense | 5,540 | 11,337 | 12,923 | 22,238
Internal labor [Member] |  |  |  |
Restructuring and integration expense [Line Items] |  |  |  |
Restructuring and integration expense | 2,480 | 1,128 | 4,520 | 2,981
Employee severance benefits [Member] |  |  |  |
Restructuring and integration expense [Line Items] |  |  |  |
Restructuring and integration expense |  |  | 3,127 |
Restructuring charges, net | 1,018 | 5,035 | 1,875 | 10,118
Other [Member] |  |  |  |
Restructuring and integration expense [Line Items] |  |  |  |
Restructuring and integration expense | $ 2,941 | $ 2,882 | $ 7,873 | $ 3,528

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