Commitments And Contingencies (Summary Of Future Lease Commitments) (Details) (USD $)	Dec. 31, 2011		Dec. 31, 2010
Commitments And Contingencies [Abstract]
2012	$ 7,991,000
2013	6,272,000
2014	5,132,000
2015	5,250,000
2016	5,041,000
Thereafter	13,427,000
Minimum payments required	43,113,000	[1]
Sublease rentals	2,117,000
Estimated contingent loss	$ 400,000		$ 500,000

[1] Minimum payments have not been reduced by sublease rentals of $2,117 due in future years under noncancelable subleases.