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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No definition available.

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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, 2020 USD ($) tannery	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2020 USD ($) tannery	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)
Concentration Risk [Line Items]
Net sales	$ 374,910	$ 938,735	$ 542,205	$ 276,839	$ 394,130	$ 873,800	$ 501,913	$ 250,594	$ 2,132,689	$ 2,020,437	$ 1,903,339
Number of tanneries \| tannery	2								2
Long-lived assets	$ 209,037				213,796				$ 209,037	213,796
Sales Revenue, Net \| International net sales
Concentration Risk [Line Items]
Net sales									$ 730,997	$ 742,079	$ 729,278
Concentration risk (as a percent)									34.30%	36.70%	38.30%
Sales Revenue, Net \| Net sales in foreign currencies
Concentration Risk [Line Items]
Net sales									$ 587,233	$ 605,725	$ 617,867
Concentration risk (as a percent)									27.50%	30.00%	32.50%
Sales Revenue, Net \| Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk (as a percent)									23.70%	27.70%	28.20%
US
Concentration Risk [Line Items]
Long-lived assets	194,679				196,702				$ 194,679	$ 196,702
Foreign
Concentration Risk [Line Items]
Long-lived assets	$ 14,358				$ 17,094				$ 14,358	$ 17,094