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Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Allowance for doubtful accounts |  |  |  |
Valuation And Qualifying Accounts Disclosure [Line Items] |  |  |  |
Balance at Beginning of Year |  | $ 1,314 | $ 2,016 | $ 1,048
Charged to Expense |  | (129) | (134) | 1,123
Deduction from Reserves | [1] | (348) | (568) | (155)
Balance at End of Year |  | 837 | 1,314 | 2,016
Warranty reserve |  |  |  |
Valuation And Qualifying Accounts Disclosure [Line Items] |  |  |  |
Balance at Beginning of Year |  | 4,546 | 3,908 | 3,251
Charged to Expense |  | 3,821 | 4,850 | 4,648
Charged to Other Accounts | [2] |  |  | 82
Deduction from Reserves |  | (3,688) | (4,212) | (4,073)
Balance at End of Year |  | 4,679 | 4,546 | 3,908
Deferred tax asset valuation allowance |  |  |  |
Valuation And Qualifying Accounts Disclosure [Line Items] |  |  |  |
Balance at Beginning of Year |  | 42,562 | 42,641 | 2,713
Charged to Expense |  | (4,602) | (79) | 8,464
Charged to Other Accounts | [3] | (16,163) |  | 36,240
Deduction from Reserves | [4] |  |  | (4,776)
Balance at End of Year |  | $ 21,797 | $ 42,562 | $ 42,641
[1] | Primarily relates to write-offs of accounts receivable.
[2] | Relates to the warranty reserve acquired from acquisitions.
[3] | Valuation allowance recorded through goodwill.
[4] | Reduction in valuation allowance as a result of divesture of portion of business.

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- Definition 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. + References No definition available. + Details
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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to accounts other than cost and expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Amount of decrease in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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