Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill by Business Segment (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Goodwill [Roll Forward]
Balance at beginning of year		$ 656,399	$ 352,805
Acquisitions during the year		73,788	320,618
Measurement period adjustments		(1,390)
Goodwill impairment charge	$ (39,713)	(39,713)	0	$ 0
Foreign currency translation adjustment		(25,148)	(17,024)
Balance at end of year	663,936	663,936	656,399	352,805
Americas
Goodwill [Roll Forward]
Balance at beginning of year		470,194	151,255
Acquisitions during the year		72,056	320,618
Measurement period adjustments		(1,390)
Goodwill impairment charge		0
Foreign currency translation adjustment		(16,704)	(1,679)
Balance at end of year	524,156	524,156	470,194	151,255
EMEA
Goodwill [Roll Forward]
Balance at beginning of year		143,269	155,825
Acquisitions during the year		1,732	0
Measurement period adjustments		0
Goodwill impairment charge		0
Foreign currency translation adjustment		(5,221)	(12,556)
Balance at end of year	139,780	139,780	143,269	155,825
Asia
Goodwill [Roll Forward]
Balance at beginning of year		42,936	45,725
Acquisitions during the year		0	0
Measurement period adjustments		0
Goodwill impairment charge		(39,713)	0	0
Foreign currency translation adjustment		(3,223)	(2,789)
Balance at end of year	$ 0	$ 0	$ 42,936	$ 45,725