Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
NET INCOME (LOSS)	$ 15,304
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	29,926
Provision for doubtful accounts	2
Amortization of loan fees	1,233
Net gain on disposal of property and equipment	109
Stock-based compensation	4,564	10,055
Deferred income taxes	4,997
Changes in assets and liabilities, net of effects from business acquisition:
Accounts receivable	(11,373)
Prepaid expenses and other assets	86
Accounts payable	1,777
Accrued expenses and other liabilities	1,194
Deferred revenue	29,905
Net cash provided by operating activities	77,724
Investing Activities:
Change in restricted cash	5,409
Purchase of property and equipment	(4,836)
Proceeds from disposal of property and equipment	355
Net cash (used in) provided by investing activities	928
Financing Activities:
Issuance of common stock—equity plans	1,780
Purchase of treasury stock and other, net	(613)
Debt issuance costs	0
Conversion of warrants	0
Net cash (used in) provided by financing activities	1,167
Effect of exchange rates on cash and cash equivalents	(2,901)
Net increase in cash and cash equivalents	76,918
Cash and Cash Equivalents, Beginning of Period	285,512
Cash and Cash Equivalents, End of Period	362,430
Supplemental Disclosures of Cash Flow Information:
Cash paid for income taxes	4,300
Cash paid for interest	11,217
Cash received for income tax refunds	1,453
As Restated [Member]
NET INCOME (LOSS)		60,826	[1]
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		29,746	[1]
Provision for doubtful accounts		0	[1]
Amortization of loan fees		1,108	[1]
Net gain on disposal of property and equipment		20	[1]
Stock-based compensation		10,055	[1]
Deferred income taxes		6,965	[1]
Changes in assets and liabilities, net of effects from business acquisition:
Accounts receivable		(21,912)	[1]
Prepaid expenses and other assets		(4,778)	[1]
Accounts payable		(11,901)	[1]
Accrued expenses and other liabilities		(6,960)	[1]
Deferred revenue		29,945	[1]
Net cash provided by operating activities		93,114	[1]
Investing Activities:
Change in restricted cash		(2,256)	[1]
Payment of direct costs related to acquisitions		0
Purchase of property and equipment		(4,815)	[1]
Proceeds from disposal of property and equipment		50	[1]
Net cash (used in) provided by investing activities		(7,021)	[1]
Financing Activities:
Issuance of common stock—equity plans		3,498	[1]
Purchase of treasury stock and other, net		(4,527)	[1]
Debt issuance costs		(1,701)	[1]
Conversion of warrants		671	[1]
Net cash (used in) provided by financing activities		(2,059)	[1]
Effect of exchange rates on cash and cash equivalents		1,106	[1]
Net increase in cash and cash equivalents		85,140	[1]
Cash and Cash Equivalents, Beginning of Period		171,618	[1]
Cash and Cash Equivalents, End of Period		256,758	[1]
Supplemental Disclosures of Cash Flow Information:
Cash paid for income taxes		6,385	[1]
Cash paid for interest		11,029	[1]
Cash received for income tax refunds		$ 1,157	[1]

[1] (1) As restated - See Note 14 “Restatement of Previously Issued Financial Statements” of Notes to Condensed Consolidated Financial Statements.See notes to Condensed Consolidated Financial Statements.