Represents the number of tanneries to source products to the entity.

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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.

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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.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Concentration of Business (Details) $ in Thousands	3 Months Ended								12 Months Ended
Concentration of Business (Details) $ in Thousands	Mar. 31, 2021 USD ($) tannery	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2021 USD ($) tannery	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Concentration Risk [Line Items]
Net sales	$ 561,188	$ 1,077,759	$ 623,525	$ 283,169	$ 374,910	$ 938,735	$ 542,205	$ 276,839	$ 2,545,641	$ 2,132,689	$ 2,020,437
Number of tanneries \| tannery	2								2
Long-lived assets	$ 206,210				209,037				$ 206,210	209,037
Trade Accounts Receivable \| Customer Concentration Risk \| One Customer
Concentration Risk [Line Items]
Concentration risk									12.80%
Foreign
Concentration Risk [Line Items]
Long-lived assets	11,377				14,358				$ 11,377	14,358
Foreign \| International net sales
Concentration Risk [Line Items]
Net sales									784,164	730,997	742,079
Foreign \| Net sales in foreign currencies
Concentration Risk [Line Items]
Net sales									$ 611,897	$ 587,233	$ 605,725
Foreign \| Sales Revenue, Net \| International net sales
Concentration Risk [Line Items]
Concentration risk									30.80%	34.30%	36.70%
Foreign \| Sales Revenue, Net \| Net sales in foreign currencies
Concentration Risk [Line Items]
Concentration risk									24.00%	27.50%	30.00%
Foreign \| Sales Revenue, Net \| Customer Concentration Risk \| 10 Largest Customers
Concentration Risk [Line Items]
Concentration risk									27.80%	28.00%	27.70%
US
Concentration Risk [Line Items]
Long-lived assets	$ 194,833				$ 194,679				$ 194,833	$ 194,679