Taxes (Details Textual) (USD $)	3 Months Ended
	Apr. 01, 2012	Dec. 31, 2011
Taxes (Textual) [Abstract]
Increase in liability net of deferred tax benefit for uncertain tax positions	$ 111,000
Increase (decrease) in interest and penalties	32,000
Interest and penalties, gross	5,489,000
Reserve for income taxes, total	1,251,000
Reserve for income taxes, noncurrent	4,931,000	4,796,000
Liability for Uncertain Tax Positions, Current	558,000
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound	300,000
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	400,000
Tax years open to examination by various tax authorities	2007 through 2011
Tax years open to examination by various tax authorities for other entities	2006 through 2011
Reserve for Income Taxes to be Recorded in Additional Paid in Capital	$ 311,000