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Income Taxes - Operating loss carryfowards and tax credits (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Operating Loss Carryforwards [Line Items] |  |  |
Foreign tax credit carryforward |  | $ 16,738 | $ 20,058
United Kingdom |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards |  | 198,571 |
Foreign tax credit carryforward |  | 13,907 |
Ireland |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards |  | 61,685 |
Australia |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards |  | 32,333 |
Hong Kong |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards |  | 28,080 |
Netherlands |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards |  | 60 |
United States |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards | [1] | 23,766 |
Operating loss carryforward, portion subject to utilization limits |  | 7,000 |
Operating loss carryforward, annual utilization limit |  | 600 |
AMT credit carryforward |  | $ 2,830 |
[1] | On January 30, 2014, the Company’s U.S. mortgage operations underwent an ownership change for U.S. federal income tax purposes as a result of the Company’s acquisition of the CMG Entities. As a result of this ownership change, a limitation has been imposed upon the utilization of approximately $7.0 million of the Company’s existing U.S. net operating loss carryforwards. Utilization is limited to approximately $0.6 million per year in accordance with Section 382 of the Internal Revenue Code of 1986 as amended (“the Code”).

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