Condensed Consolidated Balance Sheets (USD $) In Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 262,787	$ 220,938
Accounts receivable, net	108,773	165,019
Inventories	18,870	28,221
Income taxes receivable	7,451	3,098
Deferred income tax asset, current	23,666	19,906
Deferred costs and prepaid commissions	34,237	43,652
Prepaid expenses	9,655	8,527
Other current assets	6,764	3,687
Total current assets	472,203	493,048
Property and equipment, net	37,228	37,169
Deferred income tax asset, net, noncurrent	82,359	72,854
Other assets	1,492	1,507
Goodwill	137,255	135,564
Intangibles assets, net	74,736	92,245
Total assets	805,273	832,387
Current liabilities:
Accounts payable	13,780	17,823
Accrued expenses	39,691	20,344
Accrued compensation and related expenses	16,941	22,680
Current portion of deferred revenues	121,370	145,291
Deferred income tax liabilities, current	337	0
Total current liabilities	192,119	206,138
Deferred income tax liabilities, noncurrent	2,183	7,430
Long-term portion of deferred revenues	5,959	6,812
Other long-term liabilities	9,173	5,422
Total liabilities	209,434	225,802
Commitments and Contingencies (Note 10)
Shareholders' equity:
Common stock, without par value, 200,000,000 shares authorized; 69,138,334 and 68,617,232 shares issued and outstanding, respectively	356,126	351,309
Retained earnings	234,369	256,829
Accumulated other comprehensive income (loss)	5,344	(1,553)
Total shareholders' equity	595,839	606,585
Total liabilities and shareholders' equity	$ 805,273	$ 832,387