Inventories (Tables)

12 Months Ended

Dec. 31, 2022

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,
	2022		2021
	(in thousands)
Raw materials	$	194,159	$	124,480
Work in process	3,501		3,049
Finished goods	5,806		4,528
	203,466		132,057
Less:  Allowance for excess and obsolete inventories	(4,527)		(1,787)
Total, net	$	198,939	$	130,270

Inventories (Allowance)

	Years Ended December 31,
	2022		2021		2020
Allowance for excess and obsolete inventories:	(in thousands)
Balance, beginning of period	$	1,787	$	3,261	$	2,644
Provisions for excess and obsolete inventories	2,852		629		1,108
Inventories written off	(112)		(2,103)		(491)
Balance, end of period	$	4,527	$	1,787	$	3,261