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Leases and Other (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net rent expense under operating leases
Minimum rentals	$ 36,309	$ 30,860	$ 29,072
Sublease rentals	(6,501)	(6,497)	(5,704)
Total rentals, net	$ 29,808	$ 24,363	$ 23,368

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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