Consolidated Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Net income	$ 88,049	$ 91,761	$ 70,045
Foreign currency translation adjustments	(7,281)	3,846	(15,980)
Pension and post-retirement plan adjustments	54,951	(28,018)	(44,218)
Comprehensive income	135,719	67,589	9,847
Comprehensive loss (income) attributable to noncontrolling interests	1,331	(840)	1,137
Comprehensive income attributable to Mine Safety Appliances	$ 137,050	$ 66,749	$ 10,984