Nature Of Operations And Significant Accounting Policies (Summary Of Property, Plant And Equipment, Net) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
Land	$ 69,385	$ 68,404
Buildings and improvements	180,909	191,821
Machinery and equipment	546,083	541,832
Gross property, plant and equipment	796,377	802,057
Less: accumulated depreciation	528,094	517,911
Property, plant and equipment, net	$ 268,283	$ 284,146

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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