Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 573,054	$ 170,861
Short-term investments	278,996	185,588
Receivables, net	1,020,707	944,943
Inventory	15,687	14,740
Prepaid expenses and other	343,060	303,229
Total current assets	2,231,504	1,619,361
Property and equipment, net	1,587,035	1,552,524
Software development costs, net	802,874	719,209
Goodwill	851,961	844,200
Intangible assets, net	501,299	566,047
Long-term investments	112,401	109,374
Other assets	145,182	219,248
Total assets	6,232,256	5,629,963
Current liabilities:
Accounts payable	204,323	238,134
Current installments of long-term debt and capital lease obligations	13,988	26,197
Deferred revenue	327,622	311,839
Accrued payroll and tax withholdings	202,640	211,554
Other accrued expenses	58,292	57,677
Total current liabilities	806,865	845,401
Long-term debt and capital lease obligations	521,016	537,552
Deferred income taxes and other liabilities	327,340	306,263
Deferred revenue	13,032	12,800
Total liabilities	1,668,253	1,702,016
Shareholders' Equity:
Common stock, $.01 par value, 500,000,000 shares authorized, 356,765,307 shares issued at September 30, 2017 and 353,731,237 shares issued at December 31, 2016	3,568	3,537
Additional paid-in capital	1,345,022	1,230,913
Retained earnings	4,602,208	4,094,327
Treasury stock, 24,452,763 shares at September 30, 2017 and 24,089,737 shares at December 31, 2016	(1,314,054)	(1,290,665)
Accumulated other comprehensive loss, net	(72,741)	(110,165)
Total shareholders' equity	4,564,003	3,927,947
Total liabilities and shareholders' equity	$ 6,232,256	$ 5,629,963