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Summary of Significant Accounting Policies - Goodwill and Intangibles (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Jun. 30, 2017
Intangible Assets: |  |  |  |  |
Amortization expense | $ 800 | $ 700 | $ 1,500 | $ 1,400 |
Goodwill | 90,197 |  | 90,197 |  | $ 87,214
Intangible assets, net | 19,449 |  | 19,449 |  | 20,226
Gross Carrying Amount | 42,700 |  | 42,700 |  | 42,000
Accumulated Amortization | (23,300) |  | (23,300) |  | (21,800)
Net Carrying Value | 19,400 |  | 19,400 |  | 20,200
Impairment of goodwill |  |  |  |  | 0
Assets written-off | 0 |  | 0 |  |
Future amortization of intangible assets |  |  |  |  |
2018 | 1,500 |  | 1,500 |  |
2019 | 3,000 |  | 3,000 |  |
2020 | 2,900 |  | 2,900 |  |
2021 | 2,400 |  | 2,400 |  |
2022 | 2,200 |  | 2,200 |  |
Thereafter | 7,200 |  | 7,200 |  |
Trade names |  |  |  |  |
Intangible Assets: |  |  |  |  |
Gross Carrying Amount | 17,600 |  | 17,600 |  | 17,600
Accumulated Amortization | (8,100) |  | (8,100) |  | (7,600)
Net Carrying Value | 9,500 |  | 9,500 |  | 10,000
Customer and distributor relationships |  |  |  |  |
Intangible Assets: |  |  |  |  |
Gross Carrying Amount | 20,500 |  | 20,500 |  | 20,100
Accumulated Amortization | (12,700) |  | (12,700) |  | (12,000)
Net Carrying Value | 7,800 |  | 7,800 |  | 8,100
Developed technology |  |  |  |  |
Intangible Assets: |  |  |  |  |
Gross Carrying Amount | 3,200 |  | 3,200 |  | 2,900
Accumulated Amortization | (2,000) |  | (2,000) |  | (1,700)
Net Carrying Value | 1,200 |  | 1,200 |  | 1,200
Other |  |  |  |  |
Intangible Assets: |  |  |  |  |
Gross Carrying Amount | 1,400 |  | 1,400 |  | 1,400
Accumulated Amortization | (500) |  | (500) |  | (500)
Net Carrying Value | $ 900 |  | $ 900 |  | $ 900

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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=66902209&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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