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v3.19.1

General - Narrative (Details) | 12 Months Ended
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Mar. 31, 2019 USD ($) store segment | Mar. 31, 2018 USD ($) | Mar. 31, 2017 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |
Number of reportable segments | segment | 6 |  |
Money market funds | $ 372,178,000 | $ 268,976,000 |
Asset retirement obligation | 12,667,000 | 8,670,000 |
Asset impairment charges | 180,000 | 2,417,000 | $ 13,222,000
Research and development costs | 23,187,000 | 22,372,000 | 21,256,000
Advertising, marketing, and promotion expense | 118,291,000 | 111,658,000 | 109,579,000
Prepaid advertising, marketing, and promotion expense | $ 6,006,000 | 2,545,000 |
Employer matching contribution percentage | 50.00% |  |
Employer matching contribution, percent of employees' gross pay | 6.00% |  |
Defined contribution plan cost | $ 3,060,000 | 2,269,000 | 2,124,000
Facility Closing | Fiscal Year 2016 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Number of stores closed | store | 46 |  |
Direct-to-Consumer |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Asset impairment charges | $ 180,000 | 2,417,000 | $ 11,265,000
Cloud Computing Arrangement |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Prepaid hosting costs | $ 0 | $ 0 |
Minimum |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Property, plant and equipment useful life (at least) | 1 year |  |
Minimum | Cloud Computing Arrangement |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Hosting arrangement useful life | 1 year |  |
Maximum |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Derivative term of contract | 15 months |  |
Maximum | Cloud Computing Arrangement |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Hosting arrangement useful life | 5 years |  |
Moreno Valley, CA | Building and Building Improvements |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Liabilities incurred, asset retirement obligation | $ 4,706,000 |  |

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