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v3.20.2

Goodwill and other intangible assets | 9 Months Ended
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Sep. 30, 2020
Goodwill and other intangible assets |
Goodwill and other intangible assets | Note 5. Goodwill and other intangible assets The change in the carrying amount of goodwill is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended
​ | ​ | September 30, | ​ | September 30,
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019
​ | ​ | (in thousands)
Goodwill, beginning of period | ​ | $ | 539,818 | ​ | $ | 529,145 | ​ | $ | 539,818 | ​ | $ | 501,145
Goodwill acquired | ​ |  | — | ​ |  | 10,673 | ​ |  | — | ​ |  | 38,673
Goodwill, end of period | ​ | $ | 539,818 | ​ | $ | 539,818 | ​ | $ | 539,818 | ​ | $ | 539,818
​ The gross carrying amount and accumulated amortization of intangible assets other than goodwill are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | Weighted‑
​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | Average
​ | ​ | ​ | ​ | ​ | ​ | ​ | Accumulated | ​ | Net Carrying |  | Remaining
​ | ​ | Useful Life | ​ | Gross Value | ​ | Amortization | ​ | Value |  | Useful Life
​ | ​ | ​ | ​ | (in thousands) | ​ | ​
Trademarks | ​ | 1‑8 years | ​ | $ | 34,320 | ​ | $ | 9,167 | ​ | $ | 25,153 |  | 5.8 years
Customer relationships | ​ | 2‑12 years | ​ |  | 214,320 | ​ |  | 37,564 | ​ |  | 176,756 |  | 9.7 years
Developed technology | ​ | 5 years | ​ |  | 53,560 | ​ |  | 20,419 | ​ |  | 33,141 |  | 3.2 years
Non‑competes | ​ | 2 years | ​ |  | 90 | ​ |  | 41 | ​ |  | 49 |  | 1.1 years
Balance, December 31, 2019 | ​ | ​ | ​ | $ | 302,290 | ​ | $ | 67,191 | ​ | $ | 235,099 |  |
Trademarks | ​ | 8 years | ​ | $ | 34,320 | ​ | $ | 12,383 | ​ | $ | 21,937 |  | 5.1 years
Customer relationships | ​ | 2‑12 years | ​ |  | 214,320 | ​ |  | 51,259 | ​ |  | 163,061 |  | 9.0 years
Developed technology | ​ | 5 years | ​ |  | 53,560 | ​ |  | 28,453 | ​ |  | 25,107 |  | 2.4 years
Non‑competes | ​ | 2 years | ​ |  | 90 | ​ |  | 75 | ​ |  | 15 |  | 0.3 years
Balance, September 30, 2020 | ​ | ​ | ​ | $ | 302,290 | ​ | $ | 92,170 | ​ | $ | 210,120 |  |
​ Amortization expense was $8.3 million for both the three months ended September 30, 2020 and 2019. Amortization expense was $25.0 million and $24.5 million for the nine months ended September 30, 2020 and 2019, respectively. There were no impairments to goodwill or intangible assets recorded for the three and nine months ended September 30, 2020 and 2019.

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- Definition The entire disclosure for goodwill and 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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