Property, Plant and Equipment (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended			3 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Mar. 31, 2011 Eltmann Plant [Member]
Property, Plant and Equipment [Line Items]
Reduction in machinery and equipment					$ 11,102
Accumulated Depreciation					9,759
Net Reduction in Property, Plant and Equipment		1,343			1,343
Property Plant and Equipment (Textual) [Abstract]
Addition of Land and Building Total	1,948
Capital Lease Obligation Period	20 years		20 years
Depreciation expense		$ 17,601	$ 16,996	$ 18,627