Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 272,368		$ 433,663	$ 514,997	$ 207,801
Short-term investments	85,410		96,206
Accounts receivable, net of allowances of $4,094 and $3,685, respectively	97,376		91,699
Prepaid expenses and other current assets	36,738		22,602
Deferred income taxes	7,787		2,013
Total current assets	499,679		646,183
Long-term investments	52,889		60,508
Property and equipment, net	59,829		38,217
Tradenames, net	123,338		105,551
Patent and patent licenses, net	20,352		24,927
Customer relationships, net	205,760		163,766
Goodwill	772,916		635,675
Other purchased intangibles, net	16,637		17,556
Other assets	13,599		12,819
Total assets	1,764,999		1,705,202
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	89,638		95,310
Income taxes payable	62		0
Deferred revenue, current	75,117		63,457
Capital Lease Obligations, Current	248		258
Deferred income taxes	364		342
Total current liabilities	165,429		159,367
Long-term Debt	599,183		593,350
Capital Lease Obligations, Noncurrent	175		141
Liability for uncertain tax positions	27,634		37,551
Deferred income taxes	66,206		61,960
Deferred revenue, non-current	7,367		10,182
Other long-term liabilities	27,039		22,416
Total liabilities	$ 893,033		$ 884,967
Commitments and contingencies
Common stock, $0.01 par value. Authorized 95,000,000; total issued and outstanding 47,743,985 and 47,409,514 shares, respectively	$ 477		$ 474
Additional paid-in capital	289,196		273,304
Retained Earnings (Accumulated Deficit)	606,808		553,584
Accumulated other comprehensive loss	(24,515)	$ (18,806)	(7,127)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	871,966		820,235
Total liabilities and stockholders' equity	1,764,999		1,705,202
Series A Preferred Stock [Member]
LIABILITIES AND STOCKHOLDERS' EQUITY
Preferred stock, $0.01 par value	0		0
Series B Preferred Stock [Member]
LIABILITIES AND STOCKHOLDERS' EQUITY
Preferred stock, $0.01 par value	$ 0		$ 0