Property, Plant, And Equipment (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant, And Equipment [Abstract]
Land and land improvements	$ 16,165	$ 15,801
Building and improvements	71,411	68,402
Machinery and equipment	199,622	193,355
Construction in progress	5,063	7,010
Property, plant, and equipment, gross	292,261	284,568
Less: accumulated depreciation	(140,648)	(132,594)
Property, plant, and equipment, net	$ 151,613	$ 151,974