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Basis of Presentation and Significant Accounting Policies - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Beginning balance	$ 293,165	$ 285,502
Acquisition (Note 2)		16,609
Translation	3,267	(8,946)
Purchase price adjustment	588
Ending balance	297,020	293,165
Government Operations
Goodwill [Roll Forward]
Beginning balance	172,087	155,939
Acquisition (Note 2)		16,609
Translation	578	(461)
Purchase price adjustment	588
Ending balance	173,253	172,087
Commercial Operations
Goodwill [Roll Forward]
Beginning balance	121,078	129,563
Acquisition (Note 2)		0
Translation	2,689	(8,485)
Purchase price adjustment	0
Ending balance	$ 123,767	$ 121,078

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