Leases Leases (Schedule of Lease Minimum Payments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Operating Lease Expense [Member]
lease payments [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 26,837
Operating Leases, Future Minimum Payments, Due in Two Years	25,109
Operating Leases, Future Minimum Payments, Due in Three Years	17,748
Operating Leases, Future Minimum Payments, Due in Four Years	9,708
Operating Leases, Future Minimum Payments, Due in Five Years	7,306
Operating Leases, Future Minimum Payments, Due Thereafter	5,334
Operating Leases, Future Minimum Payments Due	92,042
Royalty Agreements [Member]
lease payments [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	26,303
Operating Leases, Future Minimum Payments, Due in Two Years	35,954
Operating Leases, Future Minimum Payments, Due in Three Years	37,725
Operating Leases, Future Minimum Payments, Due in Four Years	33,833
Operating Leases, Future Minimum Payments, Due in Five Years	32,690
Operating Leases, Future Minimum Payments, Due Thereafter	147,103
Operating Leases, Future Minimum Payments Due	$ 313,608