v3.19.3

ACQUIRED INTANGIBLE ASSETS | 9 Months Ended
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Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
ACQUIRED INTANGIBLE ASSETS | ACQUIRED INTANGIBLE ASSETS During the three and nine months ended September 30, 2019, the Company did not make any material acquisitions. The following table presents the detail of acquired intangible assets as of the periods presented (in thousands):
| Balance at September 30, 2019
Cost |  | Accumulated Amortization |  | Net
Technology assets | 54,630 |  |  | (30,682 | ) |  | 23,948 |
Customer assets | 44,045 |  |  | (6,089 | ) |  | 37,956 |
Trade name | 11,300 |  |  | (3,767 | ) |  | 7,533 |
Other | 5,299 |  |  | (1,943 | ) |  | 3,356 |
Total | $ | 115,274 |  |  | $ | (42,481 | ) |  | $ | 72,793 |
| Balance at December 31, 2018
Cost |  | Accumulated Amortization |  | Net
Technology assets | $ | 45,978 |  |  | $ | (28,420 | ) |  | $ | 17,558 |
Customer assets | 57,109 |  |  | (8,068 | ) |  | 49,041 |
Trade name | 11,300 |  |  | (1,648 | ) |  | 9,652 |
Other | 2,246 |  |  | (1,395 | ) |  | 851 |
Total | $ | 116,633 |  |  | $ | (39,531 | ) |  | $ | 77,102 |
All intangible assets are amortized over their estimated useful lives. The weighted average amortization periods for acquired technology, customer intangible assets, and acquired trade name are approximately 5 years, 12 years and 4 years, respectively. The changes to the carrying value of intangible assets were as follows (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Acquired intangible assets, net, beginning of the period | $ | 84,216 |  |  | $ | 85,514 |  |  | $ | 77,102 |  |  | $ | 14,334 |
Acquisitions | — |  |  | — |  |  | 14,559 |  |  | 75,871 |
Amortization expense | (3,841 | ) |  | (4,384 | ) |  | (11,286 | ) |  | (9,075 | )
Transfer to assets held for sale (Note 8) | (7,582 | ) |  | — |  |  | (7,582 | ) |  | — |
Acquired intangible assets, net, end of the period | $ | 72,793 |  |  | $ | 81,130 |  |  | $ | 72,793 |  |  | $ | 81,130 |
The total estimated future amortization expense of these intangible assets as of September 30, 2019 is as follows (in thousands):
2019 (remaining 3 months) | $ | 3,714 |
2020 | 12,800 |
2021 | 11,829 |
2022 | 10,134 |
2023 | 8,917 |
Thereafter | 25,399 |
Total | $ | 72,793 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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