v3.22.0.1

Intangible Assets and Goodwill | 12 Months Ended
--- | ---
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets and Goodwill | Intangible Assets and Goodwill Intangible Assets Identifiable intangible assets consisted of the following (in thousands):
|  | December 31, 2020 |  | December 31, 2021
|  | Gross Carrying Amount (1) | Accumulated Amortization (1) | Net Carrying Value |  | Gross Carrying Amount (1) | Accumulated Amortization (1) | Net Carrying Value
Listing relationships |  | $ | 42,501 |  | $ | (9,492) |  | $ | 33,009 |  |  | $ | 42,501 |  | $ | (15,467) |  | $ | 27,034 |
Customer contacts |  | 4,346 |  | (2,159) |  | 2,187 |  |  | 4,346 |  | (3,570) |  | 776 |
Developed technology |  | 37,800 |  | (28,417) |  | 9,383 |  |  | 22,900 |  | (20,956) |  | 1,944 |
Trade names |  | 35,753 |  | (13,823) |  | 21,930 |  |  | 33,163 |  | (17,980) |  | 15,183 |
Other |  | 9,652 |  | (275) |  | 9,377 |  |  | 9,650 |  | (2,279) |  | 7,371 |
Total intangible assets |  | $ | 130,052 |  | $ | (54,166) |  | $ | 75,886 |  |  | $ | 112,560 |  | $ | (60,252) |  | $ | 52,308 |
(1) Excludes write off of intangible assets that have been fully amortized. Amortization expense related to intangible assets for the years ended December 31, 2019, 2020, and 2021 was $46.1 million, $36.2 million, and $23.6 million, respectively. Estimated future amortization expense for intangible assets as of December 31, 2021 was as follows (in thousands):
Year Ending December 31, | Amount
2022 | $ | 16,320 |
2023 | 12,065 |
2024 | 6,988 |
2025 | 5,313 |
2026 | 3,679 |
Thereafter | 7,943 |
Total future amortization expense | $ | 52,308 |
Goodwill The changes in the carrying amount of goodwill for the years ended December 31, 2020 and 2021 were as follows (in thousands):
| Amount
Balance as of December 31, 2019 | $ | 652,088 |
Foreign currency translation adjustments | 3,713 |
Balance as of December 31, 2020 | 655,801 |
Foreign currency translation adjustments | (3,199) |
Balance as of December 31, 2021 | $ | 652,602 |

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration