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v3.20.4

Goodwill | 12 Months Ended
--- | ---
Dec. 31, 2020
Intangible assets |
Goodwill | 19. Goodwill ​
​ | ​ | ​ | ​
Balance, December 31, 2018 |  | $ | 671,594
Additions | ​ |  | 93
Foreign exchange movement | ​ |  | 623
Balance, December 31, 2019 | ​ | $ | 672,310
Additions (Note 4) | ​ |  | 165,770
Foreign exchange movement | ​ |  | 2,530
Balance, December 31, 2020 | ​ | $ | 840,610
​

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- Definition The entire disclosure for goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
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