Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 item	Dec. 31, 2012
Restricted Cash
Amount of restricted cash	$ 4,124,000	$ 2,634,000
Accounts Receivable
Maturity period of accounts receivable	30 days
Allowance for doubtful accounts	1,200,000	2,300,000
Goodwill and Intangible Assets
Number of reporting units	2
Accrued Expenses
Compensation related expenses	$ 15,300,000	$ 16,600,000
Revenue Recognition
Period subsequent to purchase during which spare parts and workholding products excluding special orders can be returned by customers	90 days
Buildings
Property, plant and equipment
Estimated useful lives of the assets	40 years
Machinery
Property, plant and equipment
Estimated useful lives of the assets	12 years
Patterns, tools, jigs and furniture and fixtures
Property, plant and equipment
Estimated useful lives of the assets	10 years
Office and computer equipment
Property, plant and equipment
Estimated useful lives of the assets	5 years