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Goodwill and Purchased Intangible Assets - Purchased Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Jun. 30, 2017
Components of purchased intangible assets |  |  |  |  |
Gross Carrying Amount | $ 234,192 |  | $ 234,192 |  | $ 234,192
Accumulated Amortization and Impairment | 217,629 |  | 217,629 |  | 215,229
Total | 16,563 |  | 16,563 |  | 18,963
Other intangible assets, amortization expense | 1,200 | $ 500 | 2,400 | $ 1,800 |
Existing technology |  |  |  |  |
Components of purchased intangible assets |  |  |  |  |
Gross Carrying Amount | 157,259 |  | 157,259 |  | 157,259
Accumulated Amortization and Impairment | 142,459 |  | 142,459 |  | 140,346
Total | 14,800 |  | $ 14,800 |  | 16,913
Existing technology | Minimum |  |  |  |  |
Components of purchased intangible assets |  |  |  |  |
Range of Useful Lives |  |  | 4 years |  |
Existing technology | Maximum |  |  |  |  |
Components of purchased intangible assets |  |  |  |  |
Range of Useful Lives |  |  | 7 years |  |
Trade name/Trademark |  |  |  |  |
Components of purchased intangible assets |  |  |  |  |
Range of Useful Lives |  |  | 7 years |  |
Gross Carrying Amount | 20,993 |  | $ 20,993 |  | 20,993
Accumulated Amortization and Impairment | 19,981 |  | 19,981 |  | 19,902
Total | 1,012 |  | 1,012 |  | 1,091
Customer relationships |  |  |  |  |
Components of purchased intangible assets |  |  |  |  |
Gross Carrying Amount | 55,680 |  | 55,680 |  | 55,680
Accumulated Amortization and Impairment | 55,036 |  | 55,036 |  | 54,959
Total | 644 |  | $ 644 |  | 721
Customer relationships | Minimum |  |  |  |  |
Components of purchased intangible assets |  |  |  |  |
Range of Useful Lives |  |  | 7 years |  |
Customer relationships | Maximum |  |  |  |  |
Components of purchased intangible assets |  |  |  |  |
Range of Useful Lives |  |  | 8 years |  |
Backlog |  |  |  |  |
Components of purchased intangible assets |  |  |  |  |
Gross Carrying Amount | 260 |  | $ 260 |  | 260
Accumulated Amortization and Impairment | 153 |  | 153 |  | 22
Total | $ 107 |  | $ 107 |  | $ 238
Backlog | Maximum |  |  |  |  |
Components of purchased intangible assets |  |  |  |  |
Range of Useful Lives |  |  | 1 year |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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