Inventories

3 Months Ended

Mar. 31, 2021

Inventory Disclosure [Abstract]

Inventories

Note 5. Inventories

Inventories are valued at the lower of cost (using specific identification and first-in first-out methods) or net realizable value. The significant components of inventory consisted of the following at:

(in thousands)	March 31, 2021		December 31, 2020
Raw materials	$	102,738	$	97,988
Installations in process		2,501		994
	$	105,239	$	98,982