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v3.20.4

Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Project and non-project reserves | $ 33,824 | $ 34,225
Employee compensation and benefits | 61,260 | 59,624
Revenue and cost recognition | 25,312 | 33,588
Insurance accruals | 17,724 | 19,204
Net operating losses | 9,674 | 16,400
Lease liabilities | 62,994 | 68,447
Tax credit carryforwards | 15,566 | 8,969
Other | 3,296 | 3,318
Valuation allowance | (23,878) | (17,358)
Total deferred tax assets | 205,772 | 226,417
Deferred tax liabilities |  |
Intangible assets | (15,620) | (29,543)
Right of use assets | (56,099) | (63,032)
Other | (16,138) | (13,063)
Total deferred tax liabilities | (87,857) | (105,638)
Net deferred tax asset | $ 117,915 | $ 120,779

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