Reclassifications Out of Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Reclassifications Out of Accumulated Other Comprehensive Loss

	MSA Safety Incorporated									Noncontrolling Interests
(In thousands)	2020			2019			2018			2020		2019		2018
Pension and other post-retirement benefits(a)
Balance at beginning of period	$	(124,848)		$	(115,517)		$	(97,948)		$	—	$	—	$	—
Unrecognized net actuarial losses	(6,322)			(19,479)			(37,977)			—		—		—
Tax benefit	1,997			5,847			9,936			—		—		—
Total other comprehensive loss before reclassifications, net of tax	(4,325)			(13,632)			(28,041)			—		—		—
Amounts reclassified from accumulated other comprehensive loss into net income:
Amortization of prior service credit (Note 14)	(216)			(180)			(424)			—		—		—
Recognized net actuarial losses (Note 14)	18,079			11,028			14,507			—		—		—
Tax benefit	(4,242)			(2,775)			(3,611)			—		—		—
Total amount reclassified from accumulated other comprehensive loss, net of tax, into net income	13,621			8,073			10,472			—		—		—
Reclassification to retained earnings due to the adoption of ASU 2018-02 (Note 1)	—			(3,772)			—			—		—		—
Total other comprehensive income (loss)	$	9,296		$	(9,331)		$	(17,569)		$	—	$	—	$	—
Balance at end of period	$	(115,552)		$	(124,848)		$	(115,517)		$	—	$	—	$	—
Available-for-sale securities
Balance at beginning of period	$	6		$	(572)		$	—		$	—	$	—	$	—
Unrealized (loss) gain on available-for-sale securities (Note 18)	(7)			578			(572)			—		—		—
Balance at end of period	$	(1)		$	6		$	(572)		$	—	$	—	$	—
Foreign currency translation
Balance at beginning of period	$	(89,161)		$	(102,838)		$	(73,814)		$	423	$	496	$	801
Reclassification from accumulated other comprehensive loss into net income	216		(c)	15,261		(b)	774		(c)	—		—		—
Foreign currency translation adjustments	22,101			(1,584)			(29,798)			159		(73)		(305)
Balance at end of period	$	(66,844)		$	(89,161)		$	(102,838)		$	582	$	423	$	496