Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 337,382	$ 285,512
Restricted cash	3,315	8,733
Accounts receivable, net	131,953	114,778
Deferred tax assets—current portion	33,412	32,063
Prepaid expenses and other current assets	27,117	24,584
Total current assets	533,179	465,670
Non-Current Assets:
Restricted cash	712	652
Property and equipment, net	52,158	52,541
Goodwill	231,377	231,377
Other intangibles, net	130,650	141,882
Deferred tax assets—long-term portion	256,344	258,271
Other non-current assets	20,491	20,565
Total non-current assets	691,732	705,288
Total Assets	1,224,911	1,170,958
Current Liabilities:
Accounts payable	8,378	7,740
Accrued expenses and other liabilities	76,226	73,111
Deferred revenue—current portion	142,636	108,217
Total current liabilities	227,240	189,068
Non-Current Liabilities:
Long-term debt	273,347	273,210
Accrued exit and disposal obligations	3,595	3,926
Liability for uncertain tax positions	4,144	4,098
Deferred revenue—long-term portion	7,402	8,115
Other non-current liabilities	3,360	1,368
Total non-current liabilities	291,848	290,717
Total Liabilities	519,088	479,785
Stockholders’ Equity:
Common stock	450	449
Additional paid-in capital	576,260	571,593
Retained earnings	159,250	154,551
Accumulated other comprehensive income	3,119	(2,454)
Treasury stock	(33,256)	(32,966)
Total stockholders’ equity	705,823	691,173
Total liabilities and stockholders’ equity	$ 1,224,911	$ 1,170,958