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Basis Of Presentation And Significant Accounting Policies (Schedule Of Unamortized Balances Of Capitalized Software) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Basis Of Presentation And Significant Accounting Policies [Abstract]
Software development costs	$ 132,714	$ 72,035
Less: accumulated amortization	(34,336)	(10,736)
Software development costs, net	$ 98,378	$ 61,299

For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.

The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.