Business Segments (Revenue by Product) (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Revenue from External Customer [Line Items]
Total segment revenues	$ 1,088,705	$ 1,137,762	$ 1,125,357
Analgesics
Revenue from External Customer [Line Items]
Total segment revenues	113,936	117,697	117,451
Cough & Cold
Revenue from External Customer [Line Items]
Total segment revenues	101,909	106,214	119,020
Women's Health
Revenue from External Customer [Line Items]
Total segment revenues	227,765	236,831	240,421
Gastrointestinal
Revenue from External Customer [Line Items]
Total segment revenues	259,788	255,943	231,610
Eye & Ear Care
Revenue from External Customer [Line Items]
Total segment revenues	142,939	183,322	179,423
Dermatologicals
Revenue from External Customer [Line Items]
Total segment revenues	125,931	128,947	129,102
Oral Care
Revenue from External Customer [Line Items]
Total segment revenues	101,051	95,030	96,305
Other OTC
Revenue from External Customer [Line Items]
Total segment revenues	15,386	13,778	12,025
North American OTC Healthcare
Revenue from External Customer [Line Items]
Total segment revenues	913,576	960,010	958,260
North American OTC Healthcare \| Analgesics
Revenue from External Customer [Line Items]
Total segment revenues	108,300	112,173	111,996
North American OTC Healthcare \| Cough & Cold
Revenue from External Customer [Line Items]
Total segment revenues	76,878	82,533	93,575
North American OTC Healthcare \| Women's Health
Revenue from External Customer [Line Items]
Total segment revenues	205,053	216,335	217,103
North American OTC Healthcare \| Gastrointestinal
Revenue from External Customer [Line Items]
Total segment revenues	179,300	174,891	160,889
North American OTC Healthcare \| Eye & Ear Care
Revenue from External Customer [Line Items]
Total segment revenues	126,132	158,858	156,553
North American OTC Healthcare \| Dermatologicals
Revenue from External Customer [Line Items]
Total segment revenues	116,618	120,770	123,288
North American OTC Healthcare \| Oral Care
Revenue from External Customer [Line Items]
Total segment revenues	86,958	81,868	83,212
North American OTC Healthcare \| Other OTC
Revenue from External Customer [Line Items]
Total segment revenues	14,337	12,582	11,644
International OTC Healthcare
Revenue from External Customer [Line Items]
Total segment revenues	175,129	177,752	167,097
International OTC Healthcare \| Analgesics
Revenue from External Customer [Line Items]
Total segment revenues	5,636	5,524	5,455
International OTC Healthcare \| Cough & Cold
Revenue from External Customer [Line Items]
Total segment revenues	25,031	23,681	25,445
International OTC Healthcare \| Women's Health
Revenue from External Customer [Line Items]
Total segment revenues	22,712	20,496	23,318
International OTC Healthcare \| Gastrointestinal
Revenue from External Customer [Line Items]
Total segment revenues	80,488	81,052	70,721
International OTC Healthcare \| Eye & Ear Care
Revenue from External Customer [Line Items]
Total segment revenues	16,807	24,464	22,870
International OTC Healthcare \| Dermatologicals
Revenue from External Customer [Line Items]
Total segment revenues	9,313	8,177	5,814
International OTC Healthcare \| Oral Care
Revenue from External Customer [Line Items]
Total segment revenues	14,093	13,162	13,093
International OTC Healthcare \| Other OTC
Revenue from External Customer [Line Items]
Total segment revenues	$ 1,049	$ 1,196	$ 381