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GOODWILL AND INTANGIBLE ASSETS | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND INTANGIBLE ASSETS [Text Block] | GOODWILL AND INTANGIBLE ASSETS: Changes in the carrying amount of goodwill during the years ended December 31, 2017 and 2016, are as follows:
(in thousands) | Goodwill
Balance at December 31, 2015 | $ | 91,849 |
Goodwill acquired during the period | — |
Balance at December 31, 2016 | 91,849 |
Goodwill acquired during the period | — |
Balance at December 31, 2017 | $ | 91,849 |
Intangible assets consist primarily of developed technology, acquired licenses, customer relationships, trade name, domain name, in-process R&D and patent rights, and are reported net of accumulated amortization. In January 2015, the Company acquired Cambridge Semiconductor Limited (CamSemi), a UK company, resulting in the addition of the following intangible assets: developed technology of $6.6 million, which is amortized over a period of three - seven years; and customer relationships of $2.4 million, which is amortized over a period of five years. In August 2015, the Company purchased a building with existing third-party leases, resulting in the addition of in-place lease intangible assets of $0.7 million which was amortized over a period of two years. The Company amortizes the cost of all intangible assets over the shorter of the estimated useful life or the term of the developed technology, acquired licenses, customer relationships, trade name, patent rights and in-place leases, which range from two to twelve years, with the exception of $4.7 million of in-process R&D and $1.3 million paid to acquire an internet domain name. In-process R&D is assessed for impairment until the development is completed and products are available for sale, at which time the Company will begin to amortize the in-process R&D. The Company does not expect the amortization of in-process R&D to begin in 2018. The Company acquired the rights to the internet domain name www.power.com, which is now the Company’s primary domain name; the cost to acquire the domain name has been recorded as an intangible asset and will not be amortized as it has an indefinite useful life. Amortization of acquired intangible assets was approximately $6.1 million, $6.7 million and $7.0 million in the years ended December 31, 2017, 2016 and 2015, respectively. The Company does not believe there is any significant residual value associated with the following intangible assets:
| December 31, 2017 |  | December 31, 2016
(in thousands) | Gross |  | Accumulated Amortization |  | Net |  | Gross |  | Accumulated Amortization |  | Net
Domain name | $ | 1,261 |  |  | $ | — |  |  | $ | 1,261 |  |  | $ | 1,261 |  |  | $ | — |  |  | $ | 1,261 |
In-process research and development | 4,690 |  |  | — |  |  | 4,690 |  |  | 4,690 |  |  | — |  |  | 4,690 |
Developed technology | 33,270 |  |  | (19,211 | ) |  | 14,059 |  |  | 33,270 |  |  | (15,455 | ) |  | 17,815 |
Customer relationships | 20,030 |  |  | (14,621 | ) |  | 5,409 |  |  | 20,030 |  |  | (12,474 | ) |  | 7,556 |
Technology licenses | — |  |  | — |  |  | — |  |  | 3,000 |  |  | (3,000 | ) |  | — |
In-place leases | 660 |  |  | (660 | ) |  | — |  |  | 660 |  |  | (480 | ) |  | 180 |
Total intangible assets | $ | 59,911 |  |  | $ | (34,492 | ) |  | $ | 25,419 |  |  | $ | 62,911 |  |  | $ | (31,409 | ) |  | $ | 31,502 |
The estimated future amortization expense related to definite-lived intangible assets at December 31, 2017, is as follows:
Fiscal Year | Estimated Amortization (in thousands)
2018 | $ | 5,152 |
2019 | 4,753 |
2020 | 3,528 |
2021 | 2,662 |
2022 | 1,584 |
Thereafter | 1,789 |
Total (1) | $ | 19,468 |
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(1) | The total above excludes $4.7 million of in-process R&D which will be amortized upon completion of development over the estimated useful life of the technology.

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- Definition The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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