Goodwill And Other Intangible Assets (Amortization Expense Of Acquired Intangibles) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Acquired Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 2,805	$ 2,870
Cost Of Software License [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total amortization expense	1,568	1,571
Selling And Marketing [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total amortization expense	1,232	1,232
General And Administrative [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 5	$ 67