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Commitments and Contingencies (Details) | 12 Months Ended
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Mar. 31, 2017 USD ($) ft² | Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($)
Remaining future minimum rental payments under operating leases [Abstract] |  |  |
2018 | $ 3,918,000 |  |
2019 | 3,496,000 |  |
2020 | 3,230,000 |  |
2021 | 3,300,000 |  |
2022 | 3,200,000 |  |
Thereafter | 23,687,000 |  |
Total minimum lease payments | 40,831,000 |  |
Total operating lease expenses | $ 3,495,000 | $ 3,263,000 | $ 3,030,000
Commitments to Provide Marketing Allowances under Long-Term Customer Contracts [Abstract] |  |  |
Term of long-term agreements with major customer | 4 years |  |
Breakout of allowances recorded as reduction to revenues [Abstract] |  |  |
Allowances incurred under long-term customer contracts | $ 23,684,000 | 29,845,000 | 18,358,000
Allowances related to a single exchange of product | 67,262,000 | 47,451,000 | 36,112,000
Allowances related to core inventory purchase obligations | 5,470,000 | 2,268,000 | 15,540,000
Total customer allowances recorded as a reduction of revenues | 96,416,000 | $ 79,564,000 | $ 70,010,000
Marketing Allowances and Customer Remanufactured Core Purchase Obligation [Abstract] |  |  |
2018 | 19,965,000 |  |
2019 | 8,729,000 |  |
2020 | 5,224,000 |  |
2021 | 5,224,000 |  |
2022 | 113,000 |  |
Total marketing allowances | $ 39,255,000 |  |
New Distribution Center in Mexico [Member] |  |  |
Operating Lease Commitments [Abstract] |  |  |
Operating lease term | 15 years |  |
Area of distribution center in Tijuana, Mexico | ft² | 410,000 |  |

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