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Lease Arrangements (Schedule Of Total Rental Expense Incurred Under Operating Leases For Continuing Operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Lease Arrangements [Abstract]
Total rental payments	$ 23,646	$ 22,199	$ 21,777
Less sublease rentals	(103)	(170)	(237)
Net rental expense	$ 23,543	$ 22,029	$ 21,540

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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