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OTHER INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2024
OTHER INTANGIBLE ASSETS [Abstract] |
Schedule of Intangible Assets (Excluding Goodwill) | Other intangible assets, net which are included in the accompanying Consolidated Balance Sheets consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | Acquisitions |  | Effect of |  | ​ | ​ |
​ | ​ | December 31, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | and | ​ | Foreign | ​ | December 31, |
​ | ​ | 2023 | ​ | Amortization | ​ | Impairments | ​ | Adjustments | ​ | Currency | ​ | 2024 |
Customer relationships, gross | ​ | $ | 348,673 | ​ | $ | — | ​ | $ | — |  | $ | 7,198 |  | $ | (3,160) | ​ | $ | 352,711 | ​
Customer relationships - accumulated amortization | ​ |  | (150,385) | ​ |  | (32,939) | ​ |  | — |  | ​ | (7,198) |  | ​ | 2,512 | ​ |  | (188,010) | ​
Other intangible assets, gross | ​ |  | 21,099 | ​ |  | — | ​ |  | — |  | ​ | (1) |  | ​ | (255) | ​ |  | 20,843 | ​
Other intangible assets - accumulated amortization | ​ |  | (20,954) | ​ |  | (38) | ​ |  | — |  | ​ | 1 |  | ​ | 255 | ​ |  | (20,736) | ​
Other intangible assets, net | ​ | $ | 198,433 | ​ | $ | (32,977) | ​ | $ | — | ​ | $ | — | ​ | $ | (648) | ​ | $ | 164,808 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | ​ |  | ​ |  | Acquisitions |  | Effect of |  | ​ | ​ |
​ | ​ | December 31, | ​ | ​ | ​ | ​ | ​ | and | ​ | Foreign | ​ | December 31, |
​ | ​ | 2022 | ​ | Amortization | ​ | Impairments | ​ | Adjustments | ​ | Currency | ​ | 2023 |
Customer relationships, gross | ​ | $ | 347,992 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 681 | ​ | $ | 348,673 | ​
Customer relationships - accumulated amortization | ​ |  | (116,038) | ​ |  | (33,768) | ​ |  | — | ​ |  | — | ​ |  | (579) | ​ |  | (150,385) | ​
Other intangible assets, gross | ​ |  | 21,044 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 55 | ​ |  | 21,099 | ​
Other intangible assets - accumulated amortization | ​ |  | (19,089) | ​ |  | (1,810) | ​ |  | — | ​ |  | — | ​ |  | (55) | ​ |  | (20,954) | ​
Other intangible assets, net | ​ | $ | 233,909 | ​ | $ | (35,578) | ​ | $ | — | ​ | $ | — | ​ | $ | 102 | ​ | $ | 198,433 | ​
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] | Expected future amortization of other intangible assets as of December 31, 2024 is as follows (in thousands): ​
​ | ​ | ​ | ​
2025 |  | $ | 30,941
2026 | ​ |  | 30,880
2027 | ​ |  | 30,880
2028 | ​ |  | 30,135
2029 | ​ |  | 24,272
Thereafter | ​ |  | 17,700
Total | ​ | $ | 164,808
​

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