Debt (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Debt (Textual) [Abstract]
Capital lease obligations fixed interest rate	13.00%
Repurchase facility Maximum loan borrowing capacity	$ 25,000
Repurchase facility minimum pricing rate	3.75%
Average pricing rate of outstanding amount		4.10%
Master repurchase agreement	0	90,338
Repurchase agreement with reduced available purchase limit	0
Expiration date of Repurchase Agreement	Aug. 01, 2012
Assets Held under Capital Leases [Member]
Other term debt:
Property, plant and equipment, net	$ 495	$ 681