Segment Information - Percentage of Total Sales by Product Group (Details) - Sales	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Breathing Apparatus
Revenue from External Customer [Line Items]
Concentration risk percentage	28.00%	22.00%
Fixed Gas & Flame Detection
Revenue from External Customer [Line Items]
Concentration risk percentage	20.00%	23.00%
Portable Gas Detection
Revenue from External Customer [Line Items]
Concentration risk percentage	12.00%	15.00%
Industrial Head Protection
Revenue from External Customer [Line Items]
Concentration risk percentage	9.00%	12.00%
Fall Protection
Revenue from External Customer [Line Items]
Concentration risk percentage	9.00%	4.00%
Fire & Rescue Helmets
Revenue from External Customer [Line Items]
Concentration risk percentage	5.00%	5.00%
Other
Revenue from External Customer [Line Items]
Concentration risk percentage	17.00%	19.00%