Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 709,532	$ 589,847
Short-term investments	171,180	252,622
Receivables, net	1,178,037	1,161,361
Inventory	27,704	28,159
Prepaid expenses and other	381,404	417,465
Total current assets	2,467,857	2,449,454
Property and equipment, net	1,610,496	1,656,171
Right-of-use assets	76,474	82,940
Software development costs, net	1,003,806	1,000,357
Goodwill	1,129,539	1,131,121
Intangible assets, net	434,900	458,482
Long-term investments	456,398	461,984
Other assets	194,761	193,649
Total assets	7,374,231	7,434,158
Current liabilities:
Accounts payable	359,562	329,582
Current installments of long-term debt	0	225,000
Deferred revenue	456,929	531,234
Accrued payroll and tax withholdings	284,145	317,092
Other current liabilities	278,236	223,350
Total current liabilities	1,378,872	1,626,258
Long-term Debt	1,611,303	1,611,256
Deferred income taxes	362,236	395,177
Other liabilities	113,301	121,005
Total liabilities	3,465,712	3,753,696
Shareholders' Equity:
Common stock, $0.01 par value, 500,000,000 shares authorized, 381,357,862 shares issued at March 31, 2022 and 380,232,975 shares issued at December 31, 2021	3,814	3,802
Additional paid-in capital	2,811,612	2,717,244
Retained earnings	6,877,111	6,751,692
Treasury stock, 87,383,166 shares at March 31, 2022 and December 31, 2021	(5,664,718)	(5,664,718)
Accumulated other comprehensive loss, net	(119,300)	(127,558)
Total shareholders' equity	3,908,519	3,680,462
Total liabilities and shareholders' equity	$ 7,374,231	$ 7,434,158
Common stock, par value	$ 0.01
Common Stock, Shares Authorized	500,000,000
Common stock, shares issued	381,357,862	380,232,975
Treasury Stock, Shares	87,383,166