Commitments And Contingencies Operating Lease Commitments (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Operating Lease Commitments [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 15,194
Operating Leases, Future Minimum Payments, Due in Two Years	14,547
Operating Leases, Future Minimum Payments, Due in Three Years	12,761
Operating Leases, Future Minimum Payments, Due in Four Years	11,538
Operating Leases, Future Minimum Payments, Due in Five Years	9,714
Operating Leases, Future Minimum Payments, Due Thereafter	11,283
Operating Leases, Future Minimum Payments Due	$ 75,037