Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 591,881		$ 207,801	$ 214,926	$ 218,680
Short-term investments	61,687		90,789
Prepaid expenses and other current assets	33,841		20,064
Deferred income taxes	3,232		3,126
Total current assets	761,471		389,025
Long-term investments	54,934		47,351
Property and equipment, net	40,662		31,200
Tradenames, net	82,045		83,108
Patent and patent licenses, net	28,257		28,530
Customer relationships, net	133,629		100,980
Goodwill	514,539		457,422
Other purchased intangibles, net	10,902		10,915
Deferred income taxes	0		1,845
Other assets	13,378		3,413
Total assets	1,639,817		1,153,789
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	65,586		69,570
Income taxes payable	4,727		1,569
Deferred revenue, current	57,315		36,326
Liability for uncertain tax positions	0		5,535
Deferred income taxes	1,683		1,892
Other Liabilities, Current	909		0
Total current liabilities	130,220		114,892
Long-term Debt	589,603		245,670
Liability for uncertain tax positions	42,650		38,329
Deferred income taxes	66,095		35,833
Deferred revenue, non-current	11,742		11,189
Other long-term liabilities	5,915		1,458
Total liabilities	846,225		447,371
Commitments and contingencies	0		0
Common stock, $0.01 par value. Authorized 95,000,000; total issued and outstanding 46,797,466 and 46,105,076 shares, respectively	468		461
Additional paid-in capital	266,122		216,872
Retained Earnings (Accumulated Deficit)	520,351		484,850
Accumulated other comprehensive loss	6,651	2,432	4,235
Stockholders' Equity Attributable to Noncontrolling Interest			0
Total stockholders' equity	793,592		706,418
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	793,592		706,418
Total liabilities and stockholders' equity	1,639,817		1,153,789
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