Income Taxes - Components of Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Operating lease liabilities	$ 16,808	$ 13,951
Compensation-related	13,573	10,256
Research and development costs	5,596	3,861
Workers’ compensation reserve	1,878	1,497
Employee benefit plans costs	1,614	1,046
Bad debt reserve	1,437	1,760
Capital investment overhead on contracts	535	458
Other	2,764	4,076
Total deferred tax assets	44,205	36,905
Deferred tax liabilities:
Basis differences on property, plant and equipment	(17,664)	(17,173)
Operating lease right-of-use-assets	(16,672)	(13,825)
Intangible assets	(10,912)	(10,372)
Prepaid expenses	(6,597)	(1,256)
Total deferred tax liabilities	(51,845)	(42,626)
Valuation allowance	(521)	(814)
Net deferred income tax liabilities	$ (8,161)	$ (6,535)