OTHER COMPREHENSIVE INCOME (LOSS) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period			$ 265,765
Other comprehensive income (loss)	$ 167	$ 1,951	(1,168)	$ 3,577
Balance at end of period	260,301		260,301
Losses on cash flow hedges expected to be reclassified to earnings within next 12 months (less than)			300
Currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(6,236)	(6,456)	(4,837)	(8,132)
Other comprehensive income (loss)	(43)	1,961	(1,442)	3,637
Balance at end of period	(6,279)	(4,495)	(6,279)	(4,495)
Interest rate swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(65)	(443)	(108)	(402)
Unrealized gains (losses), net of taxes	190	(375)	210	(444)
Reclassification of other comprehensive (income) loss, net of taxes	19	382	42	410
Other comprehensive income (loss)	209	7	252	(34)
Balance at end of period	144	(436)	144	(436)
Unrealized gains (losses), tax	(25)	202	(30)	239
Reclassification from AOCI, tax	(5)	(206)	(11)	(221)
Defined benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(2,509)	(1,910)	(2,530)	(1,901)
Reclassification of other comprehensive (income) loss, net of taxes	1	(17)	22	(26)
Balance at end of period	(2,508)	(1,927)	(2,508)	(1,927)
Reclassification from AOCI, tax	$ (1)	$ 9	$ (8)	$ 14