CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 375,509	$ 527,012
Accounts receivable, net of allowance for doubtful accounts of approximately $7,627 and $4,815 as of September 30, 2015 and December 31, 2014, respectively	51,066	38,694
Deferred and other income taxes, net	35,246	20,007
Income tax receivable	1,027	1,027
Prepaid expenses and other current assets	10,350	9,736
Debt issuance costs, net	3,276	3,335
Total current assets	476,474	599,811
Long-term investments	15,507	17,151
Property and equipment, net	87,627	73,753
Goodwill	1,249,945	1,138,805
Intangible assets, net	250,813	241,622
Deposits and other assets	2,933	2,676
Debt issuance costs, net	7,437	9,864
Total assets	2,090,736	2,083,682
Current liabilities:
Current portion of long-term debt	20,000	20,000
Accounts payable	14,210	8,608
Accrued wages and commissions	30,197	23,155
Accrued expenses	39,272	27,001
Deferred gain on the sale of building	2,523	2,523
Income taxes payable	11,702	0
Deferred rent	1,104	0
Deferred revenue	43,910	38,003
Total current liabilities	162,918	119,290
Long-term debt, less current portion	350,000	365,000
Deferred gain on the sale of building	21,870	23,762
Deferred rent	29,927	27,032
Deferred income taxes, net	11,262	30,349
Income taxes payable	4,801	4,703
Total liabilities	580,778	570,136
Stockholders' equity:
Total stockholders’ equity	1,509,958	1,513,546
Total liabilities and stockholders’ equity	$ 2,090,736	$ 2,083,682