Property, Plant And Equipment (Schedule Of Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, plant and equipment, Gross	$ 506,116	$ 476,643
Less accumulated depreciation	(330,012)	(312,983)
Property, plant and equipment, Net	176,104	163,660
Land [Member]
Property, plant and equipment, Gross	6,172	6,172
Buildings And Building Improvements [Member]
Property, plant and equipment, Gross	85,668	79,420
Machinery And Equipment [Member]
Property, plant and equipment, Gross	390,237	363,803
Furniture And Fixtures [Member]
Property, plant and equipment, Gross	6,799	7,351
Vehicles [Member]
Property, plant and equipment, Gross	893	784
Leasehold Improvements [Member]
Property, plant and equipment, Gross	14,200	17,708
Construction in Progress [Member]
Property, plant and equipment, Gross	$ 2,147	$ 1,405

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.

+ References+ Details

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.

+ References+ Details

- 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.

+ References+ Details