Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 1,820,106	$ 1,527,791
Accounts receivable, less allowance for credit loss of $7,285 at September 30, 2021 and $5,579 at December 31, 2020	3,330,398	1,998,055
Deferred contract costs	841,689	327,448
Other	119,346	110,250
Total current assets	6,111,539	3,963,544
Property and equipment, less accumulated depreciation and amortization of $533,450 at September 30, 2021 and $516,988 at December 31, 2020	491,577	506,425
Operating lease right-of-use assets	448,228	432,723
Goodwill	7,927	7,927
Other assets, net	17,112	16,884
Total assets	7,076,383	4,927,503
Current Liabilities:
Accounts payable	1,806,977	1,136,859
Accrued liabilities, primarily salaries and related costs	342,151	257,021
Contract liabilities	977,660	379,722
Current portion of operating lease liabilities	81,362	74,004
Federal, state and foreign income taxes	67,332	45,437
Total current liabilities	3,275,482	1,893,043
Noncurrent portion of operating lease liabilities	374,658	364,185
Deferred federal and state income taxes, net	5,651	7,048
Commitments and contingencies
Shareholders’ Equity:
Preferred stock, none issued	0	0
Common stock, par value $0.01 per share. Issued and outstanding: 169,392 shares at September 30, 2021 and 169,294 shares at December 31, 2020	1,694	1,693
Additional paid-in capital	74,925	157,496
Retained earnings	3,463,539	2,600,201
Accumulated other comprehensive loss	(122,800)	(99,753)
Total shareholders’ equity	3,417,358	2,659,637
Noncontrolling interest	3,234	3,590
Total equity	3,420,592	2,663,227
Total liabilities and equity	$ 7,076,383	$ 4,927,503