Leases (Future Min Schedule) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Leases
Capital Leases, Future Minimum Payments Due, Current	$ 2,674
Capital Leases, Future Minimum Payments Due in Two Years	1,859
Capital Leases, Future Minimum Payments Due in Three Years	1,383
Capital Leases, Future Minimum Payments Due in Four Years	1,125
Capital Leases, Future Minimum Payments Due in Five Years	1,011
Capital Leases, Future Minimum Payments Due Thereafter	7,937
Total minimum rentals	15,989
Less amounts representing interest	4,007
Capital Lease Obligations, Total	11,982	12,711
Operating Leases, Future Minimum Payments Due, Current	47,102
Operating Leases, Future Minimum Payments, Due in Two Years	46,568
Operating Leases, Future Minimum Payments, Due in Three Years	45,745
Operating Leases, Future Minimum Payments, Due in Four Years	44,973
Operating Leases, Future Minimum Payments, Due in Five Years	44,466
Operating Leases, Future Minimum Payments, Due Thereafter	362,031
Total minimum rentals	$ 590,885