Components of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ (142,682)	$ (41,717)	$ (152,824)
Before Reclassifications	(74,019)	(114,029)	112,279
Amount Reclassified from AOCI	1,695	13,064	(1,172)
Ending Balance	(215,006)	(142,682)	(41,717)
Pension funded status adjustment
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(20,791)	(22,503)	(25,555)
Before Reclassifications	(2,819)	339	1,692
Amount Reclassified from AOCI	816	1,373	1,360
Ending Balance	(22,794)	(20,791)	(22,503)
Net unrealized gain (loss) on derivative instruments
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(130)	(3,425)	1,975
Before Reclassifications	(6,672)	(8,396)	(2,868)
Amount Reclassified from AOCI	879	11,691	(2,532)
Ending Balance	(5,923)	(130)	(3,425)
Foreign currency translation adjustment
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(121,761)	(15,789)	(129,244)
Before Reclassifications	(64,528)	(105,972)	113,455
Amount Reclassified from AOCI	0	0	0
Ending Balance	$ (186,289)	$ (121,761)	$ (15,789)