Inventories (Tables)

12 Months Ended

Dec. 31, 2023

Inventory Disclosure [Abstract]

Inventories

The components of inventories and the related changes in the allowance for excess and obsolete inventories are as follows: 

	December 31,
	2023		2022
	(in thousands)
Raw materials	$	211,259	$	194,159
Work in process	5,523		3,501
Finished goods	2,910		5,806
	219,692		203,466
Less:  Allowance for excess and obsolete inventories	(6,160)		(4,527)
Total, net	$	213,532	$	198,939

Inventories (Allowance)

	Years Ended December 31,
	2023		2022		2021
Allowance for excess and obsolete inventories:	(in thousands)
Balance, beginning of period	$	4,527	$	1,787	$	3,261
Provisions for excess and obsolete inventories	5,480		2,852		629
Inventories written off	(3,847)		(112)		(2,103)
Balance, end of period	$	6,160	$	4,527	$	1,787