Industry Segment and Geographic Areas (Tables)

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas

Information regarding revenues by geographic area is as follows:

	2015		2014		2013
	(In thousands)
Revenues:
United States	$	322,535	$	309,651	$	290,019
Foreign:
Asia	8,299		10,647		8,085
Canada	9,095		12,092		8,514
Europe	17,036		19,448		15,677
Mexico	8,889		3,941		4,226
Middle East	9,672		6,221		1,604
Other	2,172		2,768		5,997
Total	$	377,698	$	364,768	$	334,122

Information regarding assets by geographic area is as follows:

	2015		2014
	(In thousands)
Long-lived assets (net property, plant and equipment):
United States	$	53,615	$	46,521
Foreign:
Europe	15,676		13,873
Mexico	21,629		21,412
Total	$	90,920	$	81,806
	2015		2014
	(In thousands)
Total assets:
United States	$	289,447	$	278,094
Foreign:
Europe	40,813		38,453
Mexico	25,220		24,611
Total	$	355,480	$	341,158