Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 2,350,794	$ 2,034,131
Accounts receivable, less allowance for credit loss of $8,358 at March 31, 2023 and $9,466 at December 31, 2022	1,604,467	2,107,645
Deferred contract costs	195,670	257,545
Other	106,080	118,696
Total current assets	4,257,011	4,518,017
Property and equipment, less accumulated depreciation and amortization of $577,841 at March 31, 2023 and $567,757 at December 31, 2022	500,482	501,916
Operating lease right-of-use assets	509,019	507,503
Goodwill	7,927	7,927
Deferred federal and state income taxes, net	38,093	37,449
Other assets, net	20,045	17,622
Total assets	5,332,577	5,590,434
Current Liabilities:
Accounts payable	950,907	1,108,996
Accrued liabilities, primarily salaries and related costs	432,816	479,262
Contract liabilities	244,667	323,101
Current portion of operating lease liabilities	98,469	95,621
Federal, state and foreign income taxes	33,197	47,075
Total current liabilities	1,760,056	2,054,055
Noncurrent portion of operating lease liabilities	422,153	422,844
Commitments and contingencies
Shareholders’ Equity:
Preferred stock, none issued	0	0
Common stock, par value $0.01 per share. Issued and outstanding: 152,712 shares at March 31,2023 and 154,313 shares at December 31, 2022	1,527	1,543
Additional paid-in capital	0	139
Retained earnings	3,336,140	3,310,892
Accumulated other comprehensive loss	(190,498)	(202,553)
Total shareholders’ equity	3,147,169	3,110,021
Noncontrolling interest	3,199	3,514
Total equity	3,150,368	3,113,535
Total liabilities and equity	$ 5,332,577	$ 5,590,434