Industry Segment and Geographic Areas (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Schedule of Information Regarding Revenues and Assets by Geographic Area

Information regarding revenues by geographic area is as follows:

	2020		2019		2018
	(In thousands)
Revenues:
United States	$	376,426	$	369,163	$	374,650
Foreign:
Asia		6,437		9,111		9,081
Canada		10,406		13,568		11,893
Europe		18,255		15,784		20,147
Mexico		4,886		5,791		3,603
Middle East		6,114		7,868		11,318
Other		3,020		3,340		3,040
Total	$	425,544	$	424,625	$	433,732

Information regarding assets by geographic area is as follows:

	2020		2019
	(In thousands)
Long-lived assets:
United States	$	48,805	$	51,539
Foreign:
Europe		15,142		14,768
Mexico		18,758		19,454
Total	$	82,705	$	85,761

	2020		2019
	(In thousands)
Total assets:
United States	$	365,748	$	326,248
Foreign:
Europe		80,337		72,296
Mexico		22,295		23,349
Total	$	468,380	$	421,893