Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 1,111,973	$ 1,230,491
Accounts receivable, less allowance for credit loss of $3,578 at March 31, 2020 and $11,143 at December 31, 2019	1,268,798	1,315,091
Deferred contract costs	143,986	131,783
Other	94,060	92,558
Total current assets	2,618,817	2,769,923
Property and equipment, less accumulated depreciation and amortization of $481,490 at March 31, 2020 and $478,906 at December 31, 2019	484,588	499,344
Operating lease right-of-use assets	372,748	390,035
Goodwill	7,927	7,927
Deferred federal and state income taxes, net	9,680	8,034
Other assets, net	16,207	16,621
Total assets	3,509,967	3,691,884
Current Liabilities:
Accounts payable	700,944	735,695
Accrued expenses, primarily salaries and related costs	201,756	189,446
Contract liabilities	170,866	154,183
Current portion of operating lease liabilities	63,748	65,367
Federal, state and foreign income taxes	21,864	23,627
Total current liabilities	1,159,178	1,168,318
Noncurrent portion of operating lease liabilities	313,644	326,347
Commitments and contingencies
Shareholders’ Equity:
Preferred stock, none issued	0	0
Common stock, par value $0.01 per share. Issued and outstanding: 166,193 shares at March 31, 2020 and 169,622 shares at December 31, 2019	1,662	1,696
Additional paid-in capital	682	3,203
Retained earnings	2,202,208	2,321,316
Accumulated other comprehensive loss	(169,746)	(131,187)
Total shareholders’ equity	2,034,806	2,195,028
Noncontrolling interest	2,339	2,191
Total equity	2,037,145	2,197,219
Total liabilities and equity	$ 3,509,967	$ 3,691,884