Concentrations of Risk (Details) - manufacturer	3 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Concentration Risk [Line Items]
Number of third-party manufacturers	113	116
Sales \| Customer Concentration Risk \| Walmart
Concentration Risk [Line Items]
Concentration risk, percentage (percent)	24.20%	24.60%
Sales \| Supplier Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage (percent)	67.10%	61.90%
Number of third-party manufacturers with long-term contracts	30	38
Top 5 brands \| Sales \| Product Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage (percent)	44.10%	42.60%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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