Costs Associated with Exit and Restructuring Activities - April 2014 Plan (Details) (USD $)	3 Months Ended
	Mar. 29, 2015
Restructuring charges
Restructuring and impairment charges	$ 813,000
Cost of Goods
Restructuring charges
Restructuring charges	75,000
Operating Earnings
Restructuring charges
Restructuring and impairment charges	738,000
April 2014 Plan
Restructuring charges
Planned Costs	5,700,000
Actual costs incurred	3,831,000
April 2014 Plan | Cost of Goods
Restructuring charges
Planned Costs	1,100,000
April 2014 Plan | Operating Earnings
Restructuring charges
Planned Costs	4,600,000
Actual costs incurred	3,831,000
Restructuring and impairment charges	361,000
April 2014 Plan | Forecast
Restructuring charges
Elimination of workforce	120
April 2014 Plan | Inventory write-down | Cost of Goods
Restructuring charges
Planned Costs	250,000
April 2014 Plan | Equipment relocation | Cost of Goods
Restructuring charges
Planned Costs	500,000
April 2014 Plan | Other charges | Cost of Goods
Restructuring charges
Planned Costs	350,000
April 2014 Plan | Workforce reduction | Operating Earnings
Restructuring charges
Planned Costs	4,100,000
Actual costs incurred	3,677,000
April 2014 Plan | Other charges, including pension termination costs | Operating Earnings
Restructuring charges
Planned Costs	500,000
Actual costs incurred	$ 154,000