Inventories (Tables)

9 Months Ended

Sep. 30, 2022

Inventory Disclosure [Abstract]

Inventories

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

	September 30, 2022		December 31, 2021
	(in thousands)
Raw materials	$	171,230	$	124,480
Work in process	2,739		3,049
Finished goods	5,984		4,528
Total, gross	179,953		132,057
Less:  Allowance for excess and obsolete inventories	(3,065)		(1,787)
Total, net	$	176,888	$	130,270

Inventories (Allowance)

	Three Months Ended				Nine Months Ended
	September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021
Allowance for excess and obsolete inventories:	(in thousands)
Balance, beginning of period	$	1,871	$	2,726	$	1,787	$	3,261
Provision for (recovery of) excess and	1,232		86		1,380		378
obsolete inventories
Inventories written off	(38)		(520)		(102)		(1,347)
Balance, end of period	$	3,065	$	2,292	$	3,065	$	2,292