Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment
Construction in progress	$ 2,901	$ 1,453
Interest costs capitalized	0	0
Asset Retirement Obligations
ARO included in other liabilities and accrued expenses	1,320	1,397
Amount of assets associated with AROs not fully depreciated	358
Amount spent on AROs	138	193
Accretion expense recognized on AROs	61	51
Other Assets
Deferred financing costs	90	136
Other	105	109
Total	195	245
Environmental Expenditures
Capital expenditures related to environmental matters	395	428	407
Minimum
Asset Retirement Obligations
Estimated annual expenditures in years 2014 through 2018 relating to AROs	100
Maximum
Asset Retirement Obligations
Estimated annual expenditures in years 2014 through 2018 relating to AROs	$ 200
Buildings and building improvements | Minimum
Property, Plant and Equipment
Estimated useful lives of property, plant and equipment	3 years
Buildings and building improvements | Maximum
Property, Plant and Equipment
Estimated useful lives of property, plant and equipment	20 years
Machinery and equipment | Minimum
Property, Plant and Equipment
Estimated useful lives of property, plant and equipment	2 years
Machinery and equipment | Maximum
Property, Plant and Equipment
Estimated useful lives of property, plant and equipment	20 years
Furniture and fixtures | Minimum
Property, Plant and Equipment
Estimated useful lives of property, plant and equipment	3 years
Furniture and fixtures | Maximum
Property, Plant and Equipment
Estimated useful lives of property, plant and equipment	10 years
Automotive equipment | Minimum
Property, Plant and Equipment
Estimated useful lives of property, plant and equipment	3 years
Automotive equipment | Maximum
Property, Plant and Equipment
Estimated useful lives of property, plant and equipment	10 years