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Income Taxes - Tax Effects of Temporary Differences That Give Rise to Significant Portions of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Deferred tax liabilities: |  |  |
Property, plant and equipment | $ 10,927 | $ 19,606 |
Operating right-of-use-assets | 23,260 | 33,449 |
Goodwill | 37,150 | 33,354 |
Intangible assets | 1,078,302 | 1,201,086 |
Other | 9,054 | 1,761 |
Total deferred tax liabilities recognized | 1,158,693 | 1,289,256 |
Deferred tax assets: |  |  |
Operating loss and tax credits carryforwards | 88,697 | 86,893 |
Property, plant and equipment | 6,010 | 5,846 |
Operating lease liabilities | 27,593 | 36,106 |
Intangible assets | 3,602 | 4,596 |
Accrued expenses and unbilled revenue | 64,016 | 69,198 |
Stock compensation | 21,862 | 25,557 |
Deferred compensation | 2,917 | 3,445 |
Unearned revenue | 66,565 | 64,924 |
Other | 9,155 | 602 |
Total deferred tax assets | 290,417 | 297,167 |
Valuation allowance for deferred tax assets | (43,379) | (45,495) | $ (32,800)
Deferred tax assets recognized | 247,038 | 251,672 |
Overall net deferred tax asset/(liability) | $ (911,655) | $ (1,037,584) |

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