Condensed Consolidated Statements of Operations and Retained Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 258,400	$ 231,740	$ 493,892	$ 452,027
Cost of Goods and Services Sold	158,424	145,430	307,266	283,191
Gross Profit	99,976	86,310	186,626	168,836
Operating Expenses [Abstract]
Selling expenses	26,867	25,617	51,848	51,773
General and administrative expenses	25,709	21,413	53,152	43,299
Research and Development Expense	6,541	5,461	12,442	10,591
Amortization of intangibles	7,508	6,447	14,385	12,982
Operating Expenses	66,625	58,938	131,827	118,645
Income from operations	33,351	27,372	54,799	50,191
Other Income & Expenses [Abstract]
Interest Expense	10,211	6,768	18,836	12,971
Investment (income) loss	88	312	(454)	742
Foreign currency exchange (gain) loss	1,746	1,003	2,230	2,206
Other (income) expense, net	393	222	605	(2,079)
Income Tax Expense Benefit [Abstract]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	20,913	19,067	33,582	36,351
Income tax expense (benefit)	5,100	4,953	8,494	13,846
Net income (loss)	15,813	14,114	25,088	22,505
Retained Earnings Accumulated Deficit [Abstract]
Retained earnings - beginning of period		324,734	356,758	316,343
Retained earnings - end of period	$ 379,834	$ 336,844	$ 379,834	$ 336,844
Weighted Average Number Of Shares Outstanding Basic [Abstract]
Average basic shares outstanding	28,725	28,619	28,694	28,581
Weighted Average Number Of Shares Outstanding [Abstract]
Average diluted shares outstanding	29,001	28,748	28,962	28,733
Earnings Per Share Basic [Abstract]
Basic income (loss) per share:	$ 0.55	$ 0.49	$ 0.87	$ 0.79
Earnings Per Share Diluted [Abstract]
Diluted income (loss) per share:	0.55	0.49	0.87	0.78
Common Stock, Dividends, Per Share, Declared	$ 0.07	$ 0.07	$ 0.07	$ 0.07
Retained Earnings
Income Tax Expense Benefit [Abstract]
Net income (loss)	$ 15,813	$ 14,114	$ 25,088	$ 22,505
Retained Earnings Accumulated Deficit [Abstract]
Retained earnings - beginning of period	$ 366,033