Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 2,139,626	$ 1,728,692
Accounts receivable, less allowance for credit loss of $5,677 at March 31, 2022 and $6,686 at December 31, 2021	3,934,856	3,810,286
Deferred contract costs	817,435	987,266
Other	70,812	108,801
Total current assets	6,962,729	6,635,045
Property and equipment, less accumulated depreciation and amortization of $553,048 at March 31, 2022 and $541,677 at December 31, 2021	504,125	487,870
Operating lease right-of-use assets	458,637	459,158
Goodwill	7,927	7,927
Deferred federal and state income taxes, net	5,573	729
Other assets, net	17,002	19,200
Total assets	7,955,993	7,609,929
Current Liabilities:
Accounts payable	1,980,439	2,012,461
Accrued liabilities, primarily salaries and related costs	607,882	403,625
Contract liabilities	952,370	1,142,026
Current portion of operating lease liabilities	85,076	82,019
Federal, state and foreign income taxes	96,205	86,166
Total current liabilities	3,721,972	3,726,297
Noncurrent portion of operating lease liabilities	384,690	385,641
Commitments and contingencies
Shareholders’ Equity:
Preferred stock, none issued	0	0
Common stock, par value $0.01 per share. Issued and outstanding: 167,477 shares at March 31, 2022 and 167,210 shares at December 31, 2021	1,675	1,672
Additional paid-in capital	13,343	3,160
Retained earnings	3,965,803	3,620,008
Accumulated other comprehensive loss	(137,429)	(130,414)
Total shareholders’ equity	3,843,392	3,494,426
Noncontrolling interest	5,939	3,565
Total equity	3,849,331	3,497,991
Total liabilities and equity	$ 7,955,993	$ 7,609,929