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Leases (Rental Expense For Operating Leases) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Leases [Abstract]
Minimum rentals	$ 118,797	$ 118,810	$ 118,838
Sublease rentals	(2,843)	(2,395)	(1,526)
Total rental expense for operating leases	$ 115,954	$ 116,415	$ 117,312

This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes.

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