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OTHER INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2021
OTHER INTANGIBLE ASSETS [Abstract] |
Schedule of Intangible Assets (Excluding Goodwill) | Other intangible assets which are included in Other long-term assets in the accompanying Consolidated Balance Sheets consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | Acquisitions |  | Effect of |  | ​ | ​ |
​ | ​ | December 31, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | and | ​ | Foreign | ​ | December 31, |
​ | ​ | 2020 | ​ | Amortization | ​ | Impairments | ​ | Adjustments | ​ | Currency | ​ | 2021 |
Customer relationships, gross | ​ | $ | 173,601 | ​ | $ | — | ​ | $ | — |  | $ | 128,186 |  | $ | (1,839) | ​ | $ | 299,948 | ​
Customer relationships - accumulated amortization | ​ |  | (68,769) | ​ |  | (25,440) | ​ |  | (671) |  | ​ | — |  | ​ | 1,298 | ​ |  | (93,582) | ​
Other intangible assets, gross | ​ |  | 14,450 | ​ |  | — | ​ |  | — |  | ​ | 5,300 |  | ​ | (19) | ​ |  | 19,731 | ​
Other intangible assets - accumulated amortization | ​ |  | (7,223) | ​ |  | (6,529) | ​ |  | — |  | ​ | — |  | ​ | 4 | ​ |  | (13,748) | ​
Other intangible assets, net | ​ | $ | 112,059 | ​ | $ | (31,969) | ​ | $ | (671) | ​ | $ | 133,486 | ​ | $ | (556) | ​ | $ | 212,349 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | ​ |  | ​ |  | Acquisitions |  | Effect of |  | ​ | ​ |
​ | ​ | December 31, | ​ | ​ | ​ | ​ | ​ | and | ​ | Foreign | ​ | December 31, |
​ | ​ | 2019 | ​ | Amortization | ​ | Impairments | ​ | Adjustments | ​ | Currency | ​ | 2020 |
Customer relationships, gross | ​ | $ | 161,756 | ​ | $ | — | ​ | $ | — | ​ | $ | 11,570 | ​ | $ | 275 | ​ | $ | 173,601 | ​
Customer relationships - accumulated amortization | ​ |  | (54,653) | ​ |  | (13,640) | ​ |  | — | ​ |  | — | ​ |  | (476) | ​ |  | (68,769) | ​
Other intangible assets, gross | ​ |  | 13,162 | ​ |  | — | ​ |  | — | ​ |  | 1,250 | ​ |  | 38 | ​ |  | 14,450 | ​
Other intangible assets - accumulated amortization | ​ |  | (4,669) | ​ |  | (2,546) | ​ |  | — | ​ |  | — | ​ |  | (8) | ​ |  | (7,223) | ​
Other intangible assets, net | ​ | $ | 115,596 | ​ | $ | (16,186) | ​ | $ | — | ​ | $ | 12,820 | ​ | $ | (171) | ​ | $ | 112,059 | ​
Future Amortization Expense of Finite Lived Intangible Assets | Expected future amortization of other intangible assets as of December 31, 2021 is as follows (in thousands): ​
​ | ​ | ​ | ​
2022 |  | $ | 31,147
2023 | ​ |  | 29,935
2024 | ​ |  | 27,358
2025 | ​ |  | 25,324
2026 | ​ |  | 25,264
Thereafter | ​ |  | 73,321
Total | ​ | $ | 212,349

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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