Business Segments (Revenue by Product) (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Revenue from External Customer [Line Items]
Total segment revenues	$ 1,137,762	$ 1,125,357	$ 1,127,725
Analgesics
Revenue from External Customer [Line Items]
Total segment revenues	117,697	117,451	119,262
Cough & Cold
Revenue from External Customer [Line Items]
Total segment revenues	106,214	119,020	126,988
Women's Health
Revenue from External Customer [Line Items]
Total segment revenues	236,831	240,421	251,351
Gastrointestinal
Revenue from External Customer [Line Items]
Total segment revenues	255,943	231,610	226,583
Eye & Ear Care
Revenue from External Customer [Line Items]
Total segment revenues	183,322	179,423	171,076
Dermatologicals
Revenue from External Customer [Line Items]
Total segment revenues	128,947	129,102	123,741
Oral Care
Revenue from External Customer [Line Items]
Total segment revenues	95,030	96,305	97,627
Other OTC
Revenue from External Customer [Line Items]
Total segment revenues	13,778	12,025	11,097
North American OTC Healthcare
Revenue from External Customer [Line Items]
Total segment revenues	960,010	958,260	973,774
North American OTC Healthcare \| Analgesics
Revenue from External Customer [Line Items]
Total segment revenues	112,173	111,996	116,582
North American OTC Healthcare \| Cough & Cold
Revenue from External Customer [Line Items]
Total segment revenues	82,533	93,575	100,218
North American OTC Healthcare \| Women's Health
Revenue from External Customer [Line Items]
Total segment revenues	216,335	217,103	231,754
North American OTC Healthcare \| Gastrointestinal
Revenue from External Customer [Line Items]
Total segment revenues	174,891	160,889	156,957
North American OTC Healthcare \| Eye & Ear Care
Revenue from External Customer [Line Items]
Total segment revenues	158,858	156,553	151,879
North American OTC Healthcare \| Dermatologicals
Revenue from External Customer [Line Items]
Total segment revenues	120,770	123,288	119,822
North American OTC Healthcare \| Oral Care
Revenue from External Customer [Line Items]
Total segment revenues	81,868	83,212	85,542
North American OTC Healthcare \| Other OTC
Revenue from External Customer [Line Items]
Total segment revenues	12,582	11,644	11,020
International OTC Healthcare
Revenue from External Customer [Line Items]
Total segment revenues	177,752	167,097	153,951
International OTC Healthcare \| Analgesics
Revenue from External Customer [Line Items]
Total segment revenues	5,524	5,455	2,680
International OTC Healthcare \| Cough & Cold
Revenue from External Customer [Line Items]
Total segment revenues	23,681	25,445	26,770
International OTC Healthcare \| Women's Health
Revenue from External Customer [Line Items]
Total segment revenues	20,496	23,318	19,597
International OTC Healthcare \| Gastrointestinal
Revenue from External Customer [Line Items]
Total segment revenues	81,052	70,721	69,626
International OTC Healthcare \| Eye & Ear Care
Revenue from External Customer [Line Items]
Total segment revenues	24,464	22,870	19,197
International OTC Healthcare \| Dermatologicals
Revenue from External Customer [Line Items]
Total segment revenues	8,177	5,814	3,919
International OTC Healthcare \| Oral Care
Revenue from External Customer [Line Items]
Total segment revenues	13,162	13,093	12,085
International OTC Healthcare \| Other OTC
Revenue from External Customer [Line Items]
Total segment revenues	$ 1,196	$ 381	$ 77