Acquisitions And Goodwill (Schedule Of Purchase Price To Assets Acquired And Liabilities Assumed) (Details) (USD $)	Mar. 03, 2011
Business Acquisition [Line Items]
Gross contractual receivables	$ 21,461,000
Goodwill for assembled workforce	7,900,000
Purchase Price At Acquisition [Member]
Business Acquisition [Line Items]
Accounts receivable (gross contractual receivables totals to $21,461)	20,569,000
Inventories	6,800,000
Net deferred tax assets	7,552,000
Other current assets	1,606,000
Goodwill (including $7.9 million for assembled workforce)	131,167,000
Intangibles assets	85,600,000
Property, plant and equipment	10,060,000
Other assets	3,235,000
Accounts payable	(6,818,000)
Payroll and related expenses	(531,000)
Deferred revenue	(11,616,000)
Accrued expenses	(11,231,000)
Deferred tax liabilities	(35,370,000)
Long-term deferred revenue	(4,282,000)
Other long-term liabilities	(370,000)
Total net assets acquired	196,371,000
Adjustments To Purchase Price [Member]
Business Acquisition [Line Items]
Accounts receivable (gross contractual receivables totals to $21,461)
Inventories	720,000
Net deferred tax assets	328,000
Other current assets	5,747,000
Goodwill (including $7.9 million for assembled workforce)	8,995,000
Intangibles assets	(18,100,000)
Property, plant and equipment	(937,000)
Other assets	(3,098,000)
Accounts payable
Payroll and related expenses	(8,281,000)
Deferred revenue	680,000
Accrued expenses	2,492,000
Deferred tax liabilities	12,800,000
Long-term deferred revenue
Other long-term liabilities	(1,000,000)
Total net assets acquired	346,000
Adjusted Purchase Price [Member]
Business Acquisition [Line Items]
Accounts receivable (gross contractual receivables totals to $21,461)	20,569,000
Inventories	7,520,000
Net deferred tax assets	7,880,000
Other current assets	7,353,000
Goodwill (including $7.9 million for assembled workforce)	140,162,000
Intangibles assets	67,500,000
Property, plant and equipment	9,123,000
Other assets	137,000
Accounts payable	(6,818,000)
Payroll and related expenses	(8,812,000)
Deferred revenue	(10,936,000)
Accrued expenses	(8,739,000)
Deferred tax liabilities	(22,570,000)
Long-term deferred revenue	(4,282,000)
Other long-term liabilities	(1,370,000)
Total net assets acquired	$ 196,717,000