Comprehensive Income - Accumulated other comprehensive loss (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Comprehensive Income
Foreign currency translation adjustments	$ (11,479)	$ (11,671)
Pension liability, net of tax	(6,222)	(6,263)
Total accumulated other comprehensive loss	$ (17,701)	$ (17,934)

Amount, after tax, of accumulated increase (decrease) in equity from transaction and other event and circumstance from nonowner source.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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-Section 45
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(ii)
-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant