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Restructuring charges - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | $ 31,105 | $ 18,089 | $ 0 |
Impairment of long lived assets | 15,400 | 5,400 |  |
Fixed asset impairment | 20,037 | 5,411 | 0 |
Restructuring reserve | 28,353 | 10,748 | 1,637 | $ 6,419
Transaction and one time financing costs | 75,391 | $ 0 | $ 0 |
PRA Health Sciences, Inc |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Transaction and one time financing costs | 86,700 |  |  |
2021 Restructuring Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 31,100 |  |  |
Impairment of long lived assets | 21,900 |  |  |
Fixed asset impairment | 4,400 |  |  |
Workforce reductions |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring reserve | 5,200 |  |  |
Workforce reductions | 2021 Restructuring Plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 4,800 |  |  |
Lease Liability |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring reserve | 23,200 |  |  |
Lease Liability | Other current liabilities |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring reserve | 10,400 |  |  |
Lease Liability | Other Noncurrent Liabilities |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring reserve | $ 12,800 |  |  |

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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2420-110228 + Details
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- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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