Schedule of Changes in Carrying Amount of Goodwill by Business Segment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Goodwill [Line Items]
Balance at beginning of year	$ 352,737	$ 343,666
Goodwill acquired during the year	16,764	16,399
Adjustments related to the finalization of purchase accounting for prior year acquisitions	365	379
Foreign currency translation adjustment	(7,603)	(7,707)
Balance at end of year	345,499	352,737
Europe
Goodwill [Line Items]
Balance at beginning of year	173,442	177,881
Goodwill acquired during the year		3,164
Adjustments related to the finalization of purchase accounting for prior year acquisitions	155	374
Foreign currency translation adjustment	(6,889)	(7,977)
Balance at end of year	166,708	173,442
Americas
Goodwill [Line Items]
Balance at beginning of year	150,754	143,225
Goodwill acquired during the year		7,973
Adjustments related to the finalization of purchase accounting for prior year acquisitions	230	5
Foreign currency translation adjustment	(953)	(449)
Balance at end of year	150,031	150,754
Asia
Goodwill [Line Items]
Balance at beginning of year	28,541	22,560
Goodwill acquired during the year		5,262
Adjustments related to the finalization of purchase accounting for prior year acquisitions	(20)
Foreign currency translation adjustment	239	719
Balance at end of year	$ 28,760	$ 28,541