Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 255,730	$ 494,485
Accounts receivable, net	905,548	754,120
Current portion of notes receivable	29,773	30,256
Prepaid expenses and other current assets	100,668	91,166
Total current assets	1,291,719	1,370,027
Property and equipment, net	144,053	142,163
Operating lease assets	198,893	215,995
Goodwill	1,227,837	1,232,791
Intangible assets, net	28,613	31,990
Notes receivable, net	55,230	53,539
Other assets	56,823	54,404
Total assets	3,003,168	3,100,909
Current liabilities
Accounts payable, accrued expenses and other	165,455	165,025
Accrued compensation	357,222	507,556
Billings in excess of services provided	48,217	45,535
Total current liabilities	570,894	718,116
Long-term debt, net	314,337	297,158
Noncurrent operating lease liabilities	218,001	236,026
Deferred income taxes	167,797	170,612
Other liabilities	101,520	95,676
Total liabilities	1,372,549	1,517,588
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.01 par value; shares authorized — 5,000; none outstanding	0	0
Common stock, $0.01 par value; shares authorized — 75,000; shares issued and outstanding 34,540 (2022) and 34,333 (2021)	345	343
Additional paid-in capital	499	13,662
Retained earnings	1,805,485	1,698,156
Accumulated other comprehensive loss	(175,710)	(128,840)
Total stockholders' equity	1,630,619	1,583,321
Total liabilities and stockholders' equity	$ 3,003,168	$ 3,100,909