CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 784,168	$ 788,064
Short-term investments	446	714
Accounts receivable, less allowance for doubtful accounts of $5,200 and $5,500, respectively	91,579	101,229
Other receivables and current assets	200,233	192,308
Total current assets	1,076,426	1,082,315
Property and equipment, net	61,924	64,643
Goodwill	1,332,348	1,312,182
Other intangible assets, net	220,553	259,312
Other long-term assets	5,757	6,187
Deferred income taxes	32,896	28,240
Total assets	2,729,904	2,752,879
Current liabilities:
Accounts payable	4,865	3,421
Accrued bonuses and commissions	46,141	47,001
Accrued income taxes	4,695	7,127
Other accrued expenses and liabilities	63,801	74,862
Deferred revenue	364,644	332,664
Total current liabilities	484,146	465,075
Long-term liabilities:
Deferred income taxes	2,091	16,190
Other long-term liabilities	49,240	54,113
Total long-term liabilities	$ 51,331	$ 70,303
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $.01 par value; 2,000,000 shares authorized; zero shares issued or outstanding	$ 0	$ 0
Common stock, $.01 par value; 300,000,000 shares authorized; 93,236,023 shares issued	932	932
Additional paid-in capital	894,469	904,825
Retained earnings	1,792,029	1,539,508
Treasury stock, at cost: 5,096,505 and 2,470,675 shares, respectively	(440,839)	(196,010)
Accumulated other comprehensive loss	(52,164)	(31,754)
Total stockholders’ equity	2,194,427	2,217,501
Total liabilities and stockholders’ equity	$ 2,729,904	$ 2,752,879