Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Property, Plant & Equipment:
Depreciation expense	$ 4,421	$ 3,840
Capitalized interest expense	$ 174	$ 111
Land improvements
Property, Plant & Equipment:
Useful life	20 years
Buildings and improvements | Minimum
Property, Plant & Equipment:
Useful life	20 years
Buildings and improvements | Maximum
Property, Plant & Equipment:
Useful life	40 years
Machinery and equipment | Minimum
Property, Plant & Equipment:
Useful life	3 years
Machinery and equipment | Maximum
Property, Plant & Equipment:
Useful life	15 years
Tools, dies and patterns | Minimum
Property, Plant & Equipment:
Useful life	3 years
Tools, dies and patterns | Maximum
Property, Plant & Equipment:
Useful life	5 years