Commitments And Contingencies (Summary Of Leased Property Under Capital Leases) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Capital Leased Assets [Line Items]
Capital leases, gross	$ 861	$ 2,077
Less: Accumulated depreciation	(455)	(1,656)
Total capital leases, net	406	421
Computer Equipment [Member]
Capital Leased Assets [Line Items]
Capital leases, gross	753	1,880
Furniture And Fixtures [Member]
Capital Leased Assets [Line Items]
Capital leases, gross	$ 108	$ 197