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Business and Basis of Presentation (Cash and Cash Equivalents) (Details)	Mar. 31, 2020
Sydney, Australia
Cash and Cash Equivalents [Line Items]
Percentage of deposits held in one location (as percent)	14.00%

X

- Definition

Percentage of Deposits Held in One Location

+ References

No definition available.

+ Details

Name:	pbh_PercentageofDepositsHeldinOneLocation
Namespace Prefix:	pbh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_CashAndCashEquivalentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_StatementGeographicalAxis=pbh_SydneyAustraliaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: