Business Segments Information - Schedule of Additional Financial Information Attributable to Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 413,708	$ 387,847
Segment Adjusted EBITDA	80,296	75,143
Interest expense	5,264	3,802
Income tax expense	22,370	14,284
Depreciation and amortization	16,694	17,827
Equity in net (income) loss of unconsolidated affiliates	(434)	133
Capital expenditures	9,723	6,874
Investments in unconsolidated affiliates	10,891		$ 10,467
Total identifiable assets	1,068,415		1,042,159
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total identifiable assets	(6,885)		(4,732)
Domestic [Member]
Segment Reporting Information [Line Items]
Net sales	374,375	342,498
Segment Adjusted EBITDA	74,328	68,832
Interest expense	5,188	3,757
Income tax expense	17,430	13,257
Depreciation and amortization	14,803	15,953
Capital expenditures	8,469	5,881
Total identifiable assets	945,000		918,806
International Segment [Member]
Segment Reporting Information [Line Items]
Net sales	39,333	45,349
Segment Adjusted EBITDA	5,968	6,311
Interest expense	76	45
Income tax expense	4,940	1,027
Depreciation and amortization	1,891	1,874
Equity in net (income) loss of unconsolidated affiliates	(434)	133
Capital expenditures	1,254	$ 993
Investments in unconsolidated affiliates	10,891		10,467
Total identifiable assets	$ 130,300		$ 128,085