Reclassifications Out of Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Reclassifications Out of Accumulated Other Comprehensive Loss

	MSA Safety Incorporated										Noncontrolling Interests
(In thousands)	2017			2016				2015			2017			2016				2015
Pension and other post-retirement benefits
Balance at beginning of period	$	(118,068	)	$	(119,389	)		$	(125,570	)	$	—		$	—			$	—
Unrecognized net actuarial gains (losses)	17,659			(12,473		)		(8,002		)	—			—				—
Unrecognized prior service credit (cost)	—			1,092				(604		)	—			—				—
Tax (expense) benefit	(6,124		)	5,033				4,173			—			—				—
Total other comprehensive income (loss) before reclassifications, net of tax	11,535			(6,348		)		(4,433		)	—			—				—
Amounts reclassified from accumulated other comprehensive loss:
Amortization of prior service cost(a)	(176		)	(427		)		(268		)	—			—				—
Recognized net actuarial losses(a)	13,054			11,989				16,215			—			—				—
Tax benefit	(4,293		)	(3,893		)		(5,333		)	—			—				—
Total amount reclassified from accumulated other comprehensive loss, net of tax	8,585			7,669				10,614			—			—				—
Total other comprehensive income	20,120			1,321				6,181
Balance at end of period	$	(97,948	)	$	(118,068	)		$	(119,389	)	$	—		$	—			$	—
Foreign currency translation
Balance at beginning of period	$	(112,178	)	$	(88,810	)		$	(41,160	)	$	(1,964	)	$	(3,616	)		$	(2,199	)
Reclassification into net income	—			2,500			(b)	—			—			770			(c)	—
Foreign currency translation adjustments	38,364			(25,868		)		(47,650		)	2,765			882				(1,417		)
Balance at end of period	$	(73,814	)	$	(112,178	)		$	(88,810	)	$	801		$	(1,964	)		$	(3,616	)