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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2020
Income Tax Disclosure [Abstract] |
Components of Income from Continuing Operations Before Income Taxes | The following table presents the components of our income from continuing operations before income taxes (in thousands):
|  | 2020 |  |  | 2019 |  |  | 2018 |
United States earnings |  | $ | 64,810 |  |  | $ | 6,762 |  |  | $ | 205,418 |
Foreign earnings |  |  | 96,603 |  |  |  | 60,480 |  |  |  | 54,385 |
|  | $ | 161,413 |  |  | $ | 67,242 |  |  | $ | 259,803 |
Schedule of Income Tax Expense (Benefit) Attributable to Income from Continuing Operations | The income tax expense (benefit) attributable to income from continuing operations for the years ended December 31, 2020, December 31, 2019 and December 31, 2018 consists of the following (in thousands):
|  | 2020 |  |  | 2019 |  |  | 2018 |
Current |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 15,663 |  |  | $ | 22,865 |  |  | $ | - |
State |  |  | 9,024 |  |  |  | 10,428 |  |  |  | 1,536 |
Foreign |  |  | 16,534 |  |  |  | 20,159 |  |  |  | 20,253 |
Total current income tax expense |  |  | 41,221 |  |  |  | 53,452 |  |  |  | 21,789 |
Deferred |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | (186 | ) |  |  | (97,299 | ) |  |  | — |
State |  |  | (1,785 | ) |  |  | (27,432 | ) |  |  | 2,329 |
Foreign |  |  | 3,242 |  |  |  | 1,393 |  |  |  | (3,751 | )
Total deferred tax expense (benefit) |  |  | 1,271 |  |  |  | (123,338 | ) |  |  | (1,422 | )
Total income tax expense (benefit) |  | $ | 42,492 |  |  | $ | (69,886 | ) |  | $ | 20,367 |
Computation of Income Tax Expense (Benefit) | Income tax expense (benefit) was different from the amount computed by applying the United States federal statutory rate to pre-tax income from continuing operations as a result of the following (in thousands):
|  | 2020 |  |  | 2019 |  |  | 2018 |
Income before income tax expense (benefit) |  | $ | 161,413 |  |  |  |  |  |  | $ | 67,242 |  |  |  |  |  |  | $ | 259,803 |  |  |  |  |
Tax at federal statutory tax rate |  |  | 33,897 |  |  |  | 21.0 | % |  |  | 14,121 |  |  |  | 21 | % |  |  | 54,559 |  |  |  | 21 | %
S- corporation exclusion |  |  | — |  |  |  | 0.0 | % |  |  | (4,875 | ) |  |  | (7 | )% |  |  | (39,539 | ) |  |  | (15 | )%
State taxes, net of federal tax benefit |  |  | 4,838 |  |  |  | 3.0 | % |  |  | 3,223 |  |  |  | 5 | % |  |  | 3,865 |  |  |  | 1 | %
Change in tax status |  |  | 3,897 |  |  |  | 2.4 | % |  |  | (93,878 | ) |  |  | (140 | )% |  |  | — |  |  |  | — |
Change in valuation allowance |  |  | 6,850 |  |  |  | 4.2 | % |  |  | 4,502 |  |  |  | 7 | % |  |  | (2,215 | ) |  |  | (1 | )%
Change in uncertain tax positions |  |  | 883 |  |  |  | 0.6 | % |  |  | 4,118 |  |  |  | 6 | % |  |  | 629 |  |  |  | 0 | %
Foreign tax rate differential |  |  | (128 | ) |  |  | -0.1 | % |  |  | 4,886 |  |  |  | 7 | % |  |  | 4,168 |  |  |  | 2 | %
Foreign tax credits |  |  | (47 | ) |  |  | 0.0 | % |  |  | (1,313 | ) |  |  | (2 | )% |  |  | — |  |  |  | — |
Transaction costs |  |  | 61 |  |  |  | 0.0 | % |  |  | 1,052 |  |  |  | 1 | % |  |  | — |  |  |  | — |
Noncontrolling interests |  |  | (4,280 | ) |  |  | -2.6 | % |  |  | (2,282 | ) |  |  | (3 | )% |  |  | (3,599 | ) |  |  | (1 | )%
Federal research credits |  |  | (2,206 | ) |  |  | -1.4 | % |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Other, net |  |  | (1,273 | ) |  |  | -0.8 | % |  |  | 560 |  |  |  | 1 | % |  |  | 2,499 |  |  |  | 1 | %
Total income tax expense (benefit) |  | $ | 42,492 |  |  |  | 26.3 | % |  | $ | (69,886 | ) |  |  | (104 | )% |  | $ | 20,367 |  |  |  | 8 | %
Components of Deferred Tax Assets and Liabilities | The components of deferred tax assets and liabilities consists of the following at December 31, 2020 and December 31, 2019 (in thousands):
|  | 2020 |  |  | 2019 |
Deferred tax assets |  |  |  |  |  |  |  |
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 |
Reconciliation of Beginning and Ending Balances of Unrecognized Tax Benefits | A reconciliation of the beginning and ending balances of unrecognized tax benefits is as follows (in thousands):
|  | 2020 |  |  | 2019 |  |  | 2018 |
Beginning of year |  | $ | 15,526 |  |  | $ | 7,845 |  |  | $ | 7,137 |
Increases—current year tax positions |  |  | 950 |  |  |  | 7,531 |  |  |  | 1,094 |
Increases—prior year tax positions |  |  | 1,951 |  |  |  | 1,379 |  |  |  | 1,301 |
Decreases—prior year tax positions |  |  | (1,366 | ) |  |  | (991 | ) |  |  | (1,656 | )
Settlements |  |  | (666 | ) |  |  | (124 | ) |  |  | — |
Lapse of statute of limitations |  |  | — |  |  |  | (114 | ) |  |  | (31 | )
End of year |  | $ | 16,395 |  |  | $ | 15,526 |  |  | $ | 7,845 |

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