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LEASES (Tables) | 12 Months Ended
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Dec. 31, 2024
Lease, Cost [Abstract] |
Lease, Cost [Table Text Block] | The components of lease expense for the years ended December 31, 2024, 2023 and 2022 are as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Location in Statements of | ​ | Year Ended December 31, | ​
Description |  | Comprehensive Income (Loss) |  | 2024 |  | 2023 |  | 2022 |
Amortization of ROU assets - finance leases | ​ | Depreciation and amortization | ​ | $ | 2,283 | ​ | $ | 2,832 | ​ | $ | 3,785 | ​
Interest on lease liabilities - finance leases | ​ | Interest expense | ​ | ​ | 184 | ​ | ​ | 115 | ​ | ​ | 79 |
Operating lease cost (cost resulting from lease payments) | ​ | Cost of services | ​ |  | 35,957 | ​ |  | 36,872 | ​ |  | 34,786 | ​
Operating lease cost (cost resulting from lease payments) | ​ | Selling, general and administrative | ​ | ​ | 1,384 | ​ | ​ | 1,625 | ​ | ​ | 2,524 | ​
Operating lease cost (cost resulting from lease payments) | ​ | Restructuring | ​ | ​ | 1,116 | ​ | ​ | 788 | ​ | ​ | 925 | ​
Operating lease cost | ​ | Impairment | ​ | ​ | 3,980 | ​ | ​ | 10,096 | ​ | ​ | 4,821 | ​
Operating lease cost (cost resulting from lease payments) | ​ | Other income (expense), net | ​ | ​ | 1,294 | ​ | ​ | 1,352 | ​ | ​ | 1,298 | ​
Short-term lease cost | ​ | Cost of services | ​ |  | 2,211 | ​ |  | 1,182 | ​ |  | 3,428 | ​
Variable lease cost (cost excluded from lease payments | ​ | Cost of services | ​ | ​ | 777 | ​ | ​ | 827 | ​ | ​ | 1,320 | ​
Less: Sublease income | ​ | Selling, general and administrative | ​ | ​ | — | ​ | ​ | (555) | ​ | ​ | (710) | ​
Less: Sublease income | ​ | Other income (expense), net | ​ |  | (2,893) | ​ |  | (3,034) | ​ |  | (2,748) | ​
Total lease cost | ​ | ​ | ​ | $ | 46,293 |  | $ | 52,100 |  | $ | 49,508 | ​
Schedule of leases | Other supplementary information for the years ended December 31, 2024, 2023 and 2022 are as follows (dollar values in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, | ​
​ |  | 2024 |  | 2023 |  | 2022 |
Finance lease - operating cash flows | ​ | $ | 59 | ​ | $ | 38 | ​ | $ | 26 | ​
Finance lease - financing cash flows | ​ | $ | 2,405 | ​ | $ | 2,527 | ​ | $ | 3,087 | ​
Operating lease - operating cash flows (fixed payments) | ​ | $ | 46,785 | ​ | $ | 49,691 | ​ | $ | 51,693 | ​
New ROU assets - operating leases | ​ | $ | 3,357 | ​ | $ | 28,024 | ​ | $ | 36,040 | ​
Renewals of ROU assets - operating leases | ​ | $ | 8,811 | ​ | $ | 44,129 | ​ | $ | 10,629 | ​
New ROU assets - finance leases | ​ | $ | 886 | ​ | $ | 3,124 | ​ | $ | 483 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2024 | ​ | December 31, 2023 | ​ | December 31, 2022 | ​
Weighted average remaining lease term - finance leases | ​ | ​ | 1.82 years | ​ | ​ | 2.22 years | ​ | ​ | 1.87 years | ​
Weighted average remaining lease term - operating leases | ​ | ​ | 3.57 years | ​ | ​ | 4.12 years | ​ | ​ | 4.06 years | ​
Weighted average discount rate - finance leases | ​ | ​ | 6.16% | ​ | ​ | 5.51% | ​ | ​ | 2.07% | ​
Weighted average discount rate - operating leases | ​ | ​ | 7.27% | ​ | ​ | 6.88% | ​ | ​ | 4.91% | ​
Assets and liabilities lessee [Table Text Block] | Operating and financing lease right-of-use assets and lease liabilities within our Consolidated Balance Sheet as of December 31, 2024 and 2023 are as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Description | Location in Balance Sheet | ​ | December 31, 2024 | ​ | December 31, 2023 |
Assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating lease assets | Operating lease assets | ​ | $ | 91,263 | ​ | $ | 121,574 | ​
Finance lease assets | Property, plant and equipment, net | ​ |  | 2,709 | ​ |  | 4,106 | ​
Total leased assets | ​ | ​ | $ | 93,972 | ​ | $ | 125,680 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Liabilities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Current | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating | Current operating lease liabilities | ​ | $ | 33,358 | ​ | $ | 38,271 | ​
Finance | Other current liabilities | ​ | ​ | 1,662 | ​ | ​ | 2,100 | ​
Non-current | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating | Non-current operating lease liabilities | ​ | ​ | 71,008 | ​ | ​ | 96,809 | ​
Finance | Other long-term liabilities | ​ | ​ | 1,076 | ​ | ​ | 1,887 | ​
Total lease liabilities | ​ | ​ | $ | 107,104 | ​ | $ | 139,067 | ​
Schedule of future minimum operating lease payments | The future minimum operating lease and finance lease payments required under non-cancelable leases as of December 31, 2024 and 2023 are as follows (in thousands): December 31, 2024
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Operating |  | Sub-lease |  | Finance |
​ | ​ | Leases | ​ | Income | ​ | Leases |
Year 1 | ​ | $ | 39,343 | ​ | $ | (3,476) | ​ | $ | 1,699 | ​
Year 2 | ​ |  | 32,980 | ​ |  | (965) | ​ |  | 1,024 | ​
Year 3 | ​ |  | 27,402 | ​ |  | (363) | ​ |  | 156 | ​
Year 4 | ​ |  | 12,439 | ​ |  | — | ​ |  | — | ​
Year 5 | ​ |  | 2,936 | ​ |  | — | ​ |  | — | ​
Thereafter | ​ |  | 3,931 | ​ |  | — | ​ |  | — | ​
Total minimum lease payments | ​ | $ | 119,031 | ​ | $ | (4,804) | ​ | $ | 2,879 | ​
Less imputed interest | ​ | ​ | (14,665) | ​ | ​ | ​ | ​ | ​ | (142) | ​
Total lease liability | ​ | $ | 104,366 | ​ | ​ | ​ | ​ | $ | 2,737 | ​
​ December 31, 2023
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Operating |  | Sub-lease |  | Finance |
​ | ​ | Leases | ​ | Income | ​ | Leases |
Year 1 | ​ | $ | 46,258 | ​ | $ | (3,038) | ​ | $ | 2,155 | ​
Year 2 | ​ |  | 36,683 | ​ |  | (3,015) | ​ |  | 1,378 | ​
Year 3 | ​ |  | 30,984 | ​ |  | (490) | ​ |  | 704 | ​
Year 4 | ​ |  | 25,539 | ​ |  | — | ​ |  | — | ​
Year 5 | ​ |  | 11,794 | ​ |  | — | ​ |  | — | ​
Thereafter | ​ |  | 6,267 | ​ |  | — | ​ |  | — | ​
Total minimum lease payments | ​ | $ | 157,525 | ​ | $ | (6,543) | ​ | $ | 4,237 | ​
Less imputed interest | ​ | ​ | (22,445) | ​ | ​ | ​ | ​ | ​ | (250) | ​
Total lease liability | ​ | $ | 135,080 | ​ | ​ | ​ | ​ | $ | 3,987 | ​
Schedule of future minimum finance lease payments | December 31, 2024
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Operating |  | Sub-lease |  | Finance |
​ | ​ | Leases | ​ | Income | ​ | Leases |
Year 1 | ​ | $ | 39,343 | ​ | $ | (3,476) | ​ | $ | 1,699 | ​
Year 2 | ​ |  | 32,980 | ​ |  | (965) | ​ |  | 1,024 | ​
Year 3 | ​ |  | 27,402 | ​ |  | (363) | ​ |  | 156 | ​
Year 4 | ​ |  | 12,439 | ​ |  | — | ​ |  | — | ​
Year 5 | ​ |  | 2,936 | ​ |  | — | ​ |  | — | ​
Thereafter | ​ |  | 3,931 | ​ |  | — | ​ |  | — | ​
Total minimum lease payments | ​ | $ | 119,031 | ​ | $ | (4,804) | ​ | $ | 2,879 | ​
Less imputed interest | ​ | ​ | (14,665) | ​ | ​ | ​ | ​ | ​ | (142) | ​
Total lease liability | ​ | $ | 104,366 | ​ | ​ | ​ | ​ | $ | 2,737 | ​
​ December 31, 2023
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Operating |  | Sub-lease |  | Finance |
​ | ​ | Leases | ​ | Income | ​ | Leases |
Year 1 | ​ | $ | 46,258 | ​ | $ | (3,038) | ​ | $ | 2,155 | ​
Year 2 | ​ |  | 36,683 | ​ |  | (3,015) | ​ |  | 1,378 | ​
Year 3 | ​ |  | 30,984 | ​ |  | (490) | ​ |  | 704 | ​
Year 4 | ​ |  | 25,539 | ​ |  | — | ​ |  | — | ​
Year 5 | ​ |  | 11,794 | ​ |  | — | ​ |  | — | ​
Thereafter | ​ |  | 6,267 | ​ |  | — | ​ |  | — | ​
Total minimum lease payments | ​ | $ | 157,525 | ​ | $ | (6,543) | ​ | $ | 4,237 | ​
Less imputed interest | ​ | ​ | (22,445) | ​ | ​ | ​ | ​ | ​ | (250) | ​
Total lease liability | ​ | $ | 135,080 | ​ | ​ | ​ | ​ | $ | 3,987 | ​

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- Definition Tabular disclosure of undiscounted cash flows of finance lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to finance lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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