CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 1,071,786	$ 1,211,463
Accounts receivable, less allowance for doubtful accounts of approximately $5,668 and $6,469 as of September 30, 2018 and December 31, 2017, respectively	82,279	60,900
Prepaid expenses and other current assets	25,203	15,572
Total current assets	1,179,268	1,287,935
Long-term investments	10,070	10,070
Deferred income taxes, net	2,679	5,431
Property and equipment, net	81,937	84,496
Goodwill	1,548,976	1,283,457
Intangible assets, net	285,958	182,892
Deferred commission costs, net	76,062	0
Deposits and other assets	7,394	6,179
Income tax receivable	14,878	12,981
Total assets	3,207,222	2,873,441
Current liabilities:
Accounts payable	10,114	9,262
Accrued wages and commissions	50,483	54,104
Accrued expenses	33,500	22,193
Deferred gain on the sale of building	2,523	2,523
Income taxes payable	1,269	8,166
Deferred rent	5,386	4,732
Deferred revenue	50,195	45,686
Total current liabilities	153,470	146,666
Deferred gain on the sale of building	14,299	16,192
Deferred rent	31,146	33,909
Deferred income taxes, net	64,865	12,070
Income taxes payable	15,128	13,354
Total liabilities	278,908	222,191
Stockholders' equity:
Total stockholders’ equity	2,928,314	2,651,250
Total liabilities and stockholders’ equity	$ 3,207,222	$ 2,873,441