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Accounts Receivable - Net - Warranty Returns (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Mar. 31, 2017
Warranty Returns [Abstract] |  |  |  |  |
Warranty accrual included in customer returns RGA issued | $ 7,674,000 |  | $ 7,674,000 |  | $ 5,303,000
Warranty accrual included in customer finished goods returns accrual | 7,125,000 |  | 7,125,000 |  | $ 8,983,000
Change in warranty return accrual [Roll Forward] |  |  |  |  |
Balance at beginning of period | 12,849,000 | $ 11,559,000 | 14,286,000 | $ 10,845,000 |
Charged to expense/additions | 29,359,000 | 28,179,000 | 51,565,000 | 50,873,000 |
Amounts processed | (27,409,000) | (26,031,000) | (51,052,000) | (48,011,000) |
Balance at end of period | $ 14,799,000 | $ 13,707,000 | $ 14,799,000 | $ 13,707,000 |

X
- Definition Amount as of the balance sheet date of the warranty estimate for which an RGA has not been issued and is included in the customer finished goods returns accrual liability. + References No definition available. + Details
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- Definition Amount as of the balance sheet date of the warranty accrual for which an RGA has been issued and is included as an offset account to total net accounts receivable. + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(1),(c)(5) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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- Definition Amount of decrease in the standard product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard product warranty. Excludes extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(2)) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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- Definition Amount of increase in the standard product warranty accrual from warranties issued. Excludes extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3)) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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