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Employee Benefits - Plan Asset Fair Value Measurements (Details) - Level 1 - ICON Development Solutions Limited pension plan - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 26,050	$ 36,198
Government Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	22,887	0
Diversified Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,163	0
Equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	8,782
Corporate Bonds (including 50% high yield bonds)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	13,434
Secured Loans and Multi Asset Credit
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 13,982

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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