Commitments and Contingencies (Detail Textuals) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013 sqft
Loss Contingencies [Line Items]
Maximum estimated additional liabilities of future medical benefits and severance compensation	$ 1,400
Area of additional construction facility for capital improvements	25,000
Aero Metal Products, Inc. (AMP)
Loss Contingencies [Line Items]
Amount of alleged damages	3,000
Amount of counter claim	$ 3,191