Employee Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension plans
Plan assets	$ 52,081	$ 45,694	$ 89,972
Weighted average expected long-term rate	5.79%
German Pension Plan
Pension plans
Plan assets	$ 0
German Pension Plan | Minimum
Pension plans
Qualifying period	10 years
Historical performance period	10 years
German Pension Plan | Maximum
Pension plans
Historical performance period	20 years
German Pension Plan | Unfunded Plan
Pension plans
Plan assets	$ 0
U.K. Pension Plan
Pension plans
Historical performance period	10 years
Weighted average expected long-term rate	5.87%	3.45%
U.K. Pension Plan | Minimum
Pension plans
Minimum required years prior to retirement for eligibility	3 years
Historical performance period	15 years
U.K. Pension Plan | Maximum
Pension plans
Historical performance period	20 years
Asterion Pension Plan
Pension plans
Weighted average expected long-term rate	3.16%	3.80%
Asterion Pension Plan | Minimum
Pension plans
Minimum required years prior to retirement for eligibility	3 years
Norway Pension Plan
Pension plans
Weighted average expected long-term rate	4.45%	4.15%
Norway Pension Plan | Minimum
Pension plans
Minimum required years prior to retirement for eligibility	3 years