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Retirement Plans - Schedule of Plan Assets Fair Value Hierarchy (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 4,900	$ 6,300
United Kingdom Subsidiary | UK Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		210,284	356,532	$ 347,411
United Kingdom Subsidiary | UK Plan | Total plan assets in fair value hierarchy
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		89,446	217,897
United Kingdom Subsidiary | UK Plan | Total plan assets in fair value hierarchy | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		19,829	58,772
United Kingdom Subsidiary | UK Plan | Total plan assets in fair value hierarchy | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		69,617	159,125
United Kingdom Subsidiary | UK Plan | Total plan assets in fair value hierarchy | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
United Kingdom Subsidiary | UK Plan | Corporate debt funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		23,998	67,226
United Kingdom Subsidiary | UK Plan | Corporate debt funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
United Kingdom Subsidiary | UK Plan | Corporate debt funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		23,998	67,226
United Kingdom Subsidiary | UK Plan | Corporate debt funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
United Kingdom Subsidiary | UK Plan | Government bond funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		45,619	91,899
United Kingdom Subsidiary | UK Plan | Government bond funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
United Kingdom Subsidiary | UK Plan | Government bond funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		45,619	91,899
United Kingdom Subsidiary | UK Plan | Government bond funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
United Kingdom Subsidiary | UK Plan | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		19,829	58,772
United Kingdom Subsidiary | UK Plan | Cash and cash equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		19,829	58,772
United Kingdom Subsidiary | UK Plan | Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
United Kingdom Subsidiary | UK Plan | Cash and cash equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
United Kingdom Subsidiary | UK Plan | Debt funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	$ 99,990	$ 111,971
Fair value of plan assets by hierarchy and NAV [Extensible Enumeration]		Fair Value Measured at Net Asset Value Per Share [Member]	Fair Value Measured at Net Asset Value Per Share [Member]
United Kingdom Subsidiary | UK Plan | Real estate funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	$ 20,848	$ 26,664
Fair value of plan assets by hierarchy and NAV [Extensible Enumeration]		Fair Value Measured at Net Asset Value Per Share [Member]	Fair Value Measured at Net Asset Value Per Share [Member]
[1] Certain investments measured using net asset value (“NAV”) as a practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in the table are intended to permit reconciliation of the fair value hierarchy to the total fair value of plan assets.

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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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Indicates level within fair value hierarchy and fair value measured at net asset value per share as practical expedient, of defined benefit plan asset.

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