Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 1,698,587	$ 2,034,131
Accounts Receivable, less allowance for credit loss of $5,802 at June 30, 2023 and $9,466 at December 31,2022	1,423,622	2,107,645
Deferred contract costs	175,723	257,545
Other	184,614	118,696
Total current assets	3,482,546	4,518,017
Property and equipment, less accumulated depreciation and amortization of $590,490 at June 30,2023 and $567,758 at December 31,2022	494,539	501,916
Operating lease right-of-use assets	514,958	507,503
Goodwill	7,927	7,927
Deferred federal and state income taxes, net	43,550	37,449
Other assets, net	20,520	17,622
Total assets	4,564,040	5,590,434
Current Liabilities:
Accounts payable	815,514	1,108,996
Accrued liabilities, primarily salaries and related costs	422,134	479,262
Contract liabilities	218,561	323,101
Current portion of operating lease liabilities	99,962	95,621
Federal, state and foreign income taxes	22,936	47,075
Total current liabilities	1,579,107	2,054,055
Noncurrent portion of operating lease liabilities	426,829	422,844
Commitments and contingencies
Shareholders’ Equity:
Preferred stock, none issued	0	0
Common stock, par value $0.01 per share. Issued and outstanding: 147,222 shares at June 30, 2023 and 154,313 shares at December 31, 2022	1,472	1,543
Additional paid-in capital	0	139
Retained earnings	2,752,461	3,310,892
Accumulated other comprehensive loss	(198,001)	(202,553)
Total shareholders’ equity	2,555,932	3,110,021
Noncontrolling interest	2,172	3,514
Total equity	2,558,104	3,113,535
Total liabilities and equity	$ 4,564,040	$ 5,590,434