Segment Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Product Information [Line Items]
Number of geographic operating segments	11
Number of reportable segments	3
Core Products | Sales
Product Information [Line Items]
Concentration Risk, Percentage	73.00%	70.00%
Fix Gas & Flame Detection Instruments | Sales
Product Information [Line Items]
Concentration Risk, Percentage	22.00%
Breathing Apparatus | Sales
Product Information [Line Items]
Concentration Risk, Percentage	20.00%
Portable Instruments | Sales
Product Information [Line Items]
Concentration Risk, Percentage	14.00%
Head Protection | Sales
Product Information [Line Items]
Concentration Risk, Percentage	13.00%
Fall Protection | Sales
Product Information [Line Items]
Concentration Risk, Percentage	4.00%
Non-Core Products | Sales
Product Information [Line Items]
Concentration Risk, Percentage	27.00%	30.00%