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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2023
Income Tax Disclosure [Abstract]  
Summary of Components of Deferred Tax Assets and Liabilities
The table below summarizes significant components of deferred tax assets and liabilities:
 December 31,
 20232022
Deferred tax assets  
Allowance for expected credit losses$7,597 $2,923 
Accrued vacation and bonus47,115 37,776 
Share-based compensation13,857 14,599 
Notes receivable from employees10,770 11,927 
State net operating loss carryforward172 537 
Foreign net operating and capital loss carryforward13,487 11,852 
Foreign tax credit carryforward14,384 4,199 
Deferred compensation3,550 3,049 
Operating lease assets64,649 64,465 
Employee benefits obligations568 519 
Other, net2,691 763 
Total deferred tax assets178,840 152,609 
Deferred tax liabilities
Revenue recognition(2,427)(6,406)
Operating lease liabilities(52,673)(51,995)
Property and equipment, net(13,216)(12,956)
Goodwill and intangible assets(207,131)(204,634)
Total deferred tax liabilities(275,447)(275,991)
Foreign withholding tax(2,178)(1,921)
Valuation allowance(6,773)(6,459)
Net deferred tax liabilities$(105,558)$(131,762)
Summary of Components of Income Before Income Tax Provision from Continuing Operations
The table below summarizes the components of income before income tax provision from continuing operations:
 Year Ended December 31,
 202320222021
Domestic$247,381 $165,553 $136,008 
Foreign110,982 132,196 161,939 
Total$358,363 $297,749 $297,947 
Summary of Components of Income Tax Provision from Continuing Operations
The table below summarizes the components of income tax provision from continuing operations:
 Year Ended December 31,
 202320222021
Current   
Federal$28,463 $24,227 $11,050 
State18,878 12,935 8,328 
Foreign38,029 34,917 37,656 
 85,370 72,079 57,034 
Deferred
Federal6,363 (2,717)10,766 
State(3,514)(1,173)3,458 
Foreign(4,748)(5,954)(8,277)
 (1,899)(9,844)5,947 
Income tax provision$83,471 $62,235 $62,981 
Summary of Income Tax Provision from Continuing Operations Resulted in Effective Tax Rates
Our income tax provision from continuing operations resulted in effective tax rates that varied from the federal statutory income tax rate as summarized below:
 Year Ended December 31,
 202320222021
Income tax expense at federal statutory rate$75,256 $62,526 $62,569 
State income taxes, net of federal benefit12,562 10,486 8,643 
Detriment from foreign tax rates9,418 5,811 4,375 
Other expenses not deductible for tax purposes5,793 3,365 2,819 
Adjustment to reserve for uncertain tax positions(797)(609)2,665 
Share-based compensation(5,422)(9,372)(6,167)
Release of valuation allowance on foreign tax credits— (3,536)— 
Income tax benefit related to the License Agreement, net— (2,034)— 
Release of valuation allowance on Australian deferred tax asset— — (5,063)
U.S. foreign tax credits(9,464)(4,049)(4,859)
Valuation allowance on U.S. foreign tax credit carryforwards— — 3,536 
Deferred tax benefit of United Kingdom tax rate change— — (3,167)
Other adjustments, net(3,875)(353)(2,370)
Income tax provision$83,471 $62,235 $62,981