Business acquisition Babco (Schedule of Acquisitions by Assets and Liabilities) (Details) (Babco [Member], USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Feb. 10, 2012
Babco [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Current Assets, Receivables		$ 467
Business Acquisition, Purchase Price Allocation, Current Assets, Inventory		372
Business Acquisition, Purchase Price Allocation, Current Assets, Prepaid Expense and Other Assets		20
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment		4,909
Business Acquisition, Purchase Price Allocation, Goodwill Amount		7,675
Business Acquisition Purchase Price Allocation Intangible Assets Other Than Goodwill		9,347
Business Acquisition Purchase Price Allocation Current Liabilities Accounts Payable And Accrued Liabilities		(692)
Business Acquisition Purchase Price Allocation Deferred Tax Liabilities Noncurrent		(2,808)
Business Acquisition, Purchase Price Allocation, Noncurrent Liabilities, Long-term Debt		(1,145)
Net Assets Acquired Total		18,145
Business Acquisition, Cost of Acquired Entity, Cash Paid		17,530
Business Acquisition, Contingent Consideration, at Fair Value	617	615
Business Acquisition, Cost of Acquired Entity, Purchase Price		$ 18,145