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Concentration of Business, Significant Customers and Credit Risk (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2017 USD ($) supplier tannery | Dec. 31, 2016 USD ($) | Dec. 31, 2017 USD ($) supplier tannery | Dec. 31, 2016 USD ($) | Mar. 31, 2017 USD ($)
Concentration Risk [Line Items] |  |  |  |  |
Number of tanneries | tannery | 2 |  | 2 |  |
Number of suppliers | supplier | 2 |  | 2 |  |
Property and equipment | $ 215,847 |  | $ 215,847 |  | $ 225,531
International Net Sales |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk (as a percent) | 38.10% | 35.60% | 38.40% | 35.90% |
Long-lived Assets |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk (as a percent) |  |  | 10.00% |  |
Accounts Receivable | Unidentified Major Customer One |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk (as a percent) |  |  |  |  | 11.20%
Accounts Receivable | Unidentified Major Customer Two |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk (as a percent) |  |  | 20.60% |  |
US |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Property and equipment | $ 198,128 |  | $ 198,128 |  | $ 206,077
All other countries |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Revenue | $ 282,119 | $ 255,126 | $ 491,547 | $ 435,659 |
Concentration risk (as a percent) | 34.80% | 33.60% | 32.70% | 30.70% |
Property and equipment | $ 17,719 |  | $ 17,719 |  | $ 19,454

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611 + Details
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