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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2023
Income Taxes [Abstract] |
Schedule of Domestic and Foreign Components of Income before Income Tax Expense | The U.S. and foreign components of income before income tax expense for the years ended December 31, 2023, 2022 and 2021 are as follows:
|  | Year Ended December 31,
|  | 2023 |  | 2022 |  | 2021
U.S. |  | $ | 4,652 |  | $ | (4,067) |  | $ | 15,986
Foreign |  |  | 114,356 |  |  | 44,017 |  |  | 40,685
Total |  | $ | 119,008 |  | $ | 39,950 |  | $ | 56,671
Schedule of Components of Current and Deferred Income Tax Expense | The components of current and deferred income tax expense included in the Consolidated Statement of Operations for years ended December 31, 2023, 2022 and 2021 are as follows:
|  | Years Ended December 31,
|  | 2023 |  | 2022 |  | 2021
Current: |  |  |  |  |  |
Federal |  | $ | 6,957 |  | $ | 4,685 |  | $ | 5,857
State and local |  |  | 1,883 |  |  | 1,415 |  |  | 1,538
Foreign |  |  | 8,103 |  |  | (15,538) |  |  | (837)
|  | $ | 16,943 |  | $ | (9,438) |  | $ | 6,558
Deferred: |  |  |  |  |  |  |  |  |
Federal |  | $ | (494) |  | $ | (6) |  | $ | (1,217)
State and local |  |  | (102) |  |  | (1) |  |  | (251)
Foreign |  |  | 115 |  |  | (1,289) |  |  | 1,784
|  | $ | (481) |  | $ | (1,296) |  | $ | 316
Income tax expense/(benefit) |  | $ | 16,462 |  | $ | (10,734) |  | $ | 6,874
Schedule of Reconciliation of Statutory Federal Income Tax Rate and Company's Effective Rate | A reconciliation of the statutory federal income tax expense and the Company’s total income tax expense is as follows:
|  | Years Ended December 31,
|  | 2023 |  | 2022 |  | 2021
U.S. federal statutory income tax |  | $ | 24,992 |  | $ | 8,386 |  | $ | 11,901
Gain on revaluation/termination of deferred consideration(1) |  |  | (13,007) |  |  | (5,842) |  |  | (424)
Non-deductible loss on extinguishment of convertible notes |  |  | 2,263 |  |  | — |  |  | —
Foreign operations |  |  | (1,868) |  |  | (2,919) |  |  | (3,211)
Non-deductible executive compensation |  |  | 1,833 |  |  | 789 |  |  | 881
Decrease in unrecognized tax benefits, net |  |  | (1,386) |  |  | (19,871) |  |  | (4,998)
Change in valuation allowance – Capital losses |  |  | 1,340 |  |  | 4,761 |  |  | 5
Expiration of capital losses |  |  | 796 |  |  | — |  |  | —
Stock-based compensation tax shortfalls |  |  | 373 |  |  | 507 |  |  | 647
Change in tax-related indemnification assets, net |  |  | 291 |  |  | 4,173 |  |  | 1,053
Change in foreign net operating losses (“NOLs”) |  |  | 174 |  |  | — |  |  | —
Blended state income tax rate, net of federal benefit |  |  | 153 |  |  | (134) |  |  | 526
Change in valuation allowance—Foreign NOLs and interest carryforwards |  |  | — |  |  | (1,609) |  |  | —
GILTI |  |  | — |  |  | 499 |  |  | —
Other differences, net |  |  | 508 |  |  | 526 |  |  | 494
Income tax expense/(benefit) |  | $ | 16,462 |  | $ | (10,734) |  | $ | 6,874
​(1) The gain on revaluation of deferred consideration is not adjusted for income taxes as the obligation was assumed by a wholly-owned subsidiary that is based in Jersey, a jurisdiction where the Company is subject to a zero percent tax rate.
Schedule of Income Tax Payments By Jurisdiction | A summary of income taxes paid by jurisdiction for the years ended December 31, 2023, 2022 and 2021 is as follows:
|  | Years Ended December 31,
|  | 2023 |  | 2022 |  | 2021
Federal |  | $ | 4,824 |  | $ | 6,424 |  | $ | 4,258
State and local |  |  | 1,457 |  |  | 1,431 |  |  | 1,020
Foreign |  |  | 9,875 |  |  | 4,645 |  |  | 3,178
|  | $ | 16,156 |  | $ | 12,500 |  | $ | 8,456
Schedule of Components of the Company’s Deferred Tax Assets | A summary of the components of the Company’s deferred tax assets at December 31, 2023 and 2022 is as follows:
|  | 2023 |  | 2022
Deferred tax assets: |  |  |  |
Capital losses |  | $ | 22,489 |  | $ | 17,541
Accrued expenses |  |  | 6,000 |  |  | 6,030
Stock-based compensation |  |  | 2,468 |  |  | 1,526
NOLs—Foreign |  |  | 1,502 |  |  | 1,609
Goodwill and intangible assets |  |  | 895 |  |  | 1,085
Unrealized losses |  |  | 335 |  |  | 3,821
Foreign currency translation adjustment |  |  | 146 |  |  | 173
NOLs—U.S. |  |  | 127 |  |  | 255
Operating lease liabilities |  |  | 96 |  |  | 313
Outside basis differences |  |  | — |  |  | 122
Other |  |  | 401 |  |  | 341
Deferred tax assets |  |  | 34,459 |  |  | 32,816
Deferred tax liabilities: |  |  |  |  |  |
Fixed assets and prepaid assets |  |  | 296 |  |  | 278
Unremitted earnings—European subsidiaries |  |  | 186 |  |  | 205
Right of use assets—operating leases |  |  | 96 |  |  | 313
Deferred tax liabilities |  |  | 578 |  |  | 796
Total deferred tax assets less deferred tax liabilities |  |  | 33,881 |  |  | 32,020
Less: Valuation allowance |  |  | (22,824) |  |  | (21,484)
Deferred tax assets, net |  | $ | 11,057 |  | $ | 10,536
Schedule of Changes in Balance of Gross Unrecognized Tax Benefits | The table below sets forth the aggregate changes in the balance of these gross unrecognized tax benefits:
|  | Total |  | Unrecognized Tax Benefits |  | Interest and Penalties
Balance at January 1, 2022 |  | $ | 21,925 |  | $ | 18,218 |  | $ | 3,707
Decrease—Settlements(1) |  |  | (13,052) |  |  | (11,865) |  |  | (1,187)
Decrease—Lapse of statute of limitations(1) |  |  | (6,845) |  |  | (4,825) |  |  | (2,020)
Increases |  |  | 26 |  |  | — |  |  | 26
Foreign currency translation(2) |  |  | (701) |  |  | (571) |  |  | (130)
Balance at December 31, 2022 |  | $ | 1,353 |  | $ | 957 |  | $ | 396
Decrease—Lapse of statute of limitations |  |  | (1,353) |  |  | (957) |  |  | (396)
Balance at December 31, 2023 |  | $ | — |  | $ | — |  | $ | —
​(1) In January 2022, an audit of ManJer’s tax returns (a Jersey-based subsidiary) for the years ended December 31, 2014, 2016, 2017 and 2018 were resolved in favor of ManJer. The settlement, as well as the reduction in unrecognized tax benefits from the lapse of the statute of limitations totaling $19,897 during the year ended December 31, 2022 was recorded as an income tax benefit along with an equal and offsetting amount recorded in other losses and gains, net, to recognize a reduction in the indemnification asset. (2) The gross unrecognized tax benefits were accrued in British pounds.

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