Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 2,034,131	$ 1,728,692
Accounts receivable, net	2,107,645	3,810,286
Deferred contract costs	257,545	987,266
Other	118,696	108,801
Total current assets	4,518,017	6,635,045
Property and equipment, net	501,916	487,870
Operating lease right-of-use assets	507,503	459,158
Goodwill	7,927	7,927
Deferred federal and state income taxes, net	37,449	729
Other assets, net	17,622	19,200
Total assets	5,590,434	7,609,929
Current Liabilities:
Accounts payable	1,108,996	2,012,461
Accrued expenses, primarily salaries and related costs	479,262	403,625
Contract liabilities	323,101	1,142,026
Current portion of operating lease liabilities	95,621	82,019
Federal, state and foreign income taxes	47,075	86,166
Total current liabilities	2,054,055	3,726,297
Noncurrent portion of operating lease liabilities	422,844	385,641
Commitments and contingencies
Shareholders’ Equity:
Preferred stock, par value $0.01 per share, authorized 2,000 shares; none issued	0	0
Common stock, par value $0.01 per share, authorized 640,000. Issued and outstanding: 154,313 shares and 167,210 shares at December 31, 2022 and 2021, respectively	1,543	1,672
Additional paid-in capital	139	3,160
Retained earnings	3,310,892	3,620,008
Accumulated other comprehensive loss	(202,553)	(130,414)
Total shareholders’ equity	3,110,021	3,494,426
Noncontrolling interest	3,514	3,565
Total equity	3,113,535	3,497,991
Total liabilities and equity	$ 5,590,434	$ 7,609,929