Revenue (Tables)

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table summarizes the Company’s net sales by major product and service category for the periods presented:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Rail Products	$	48,355	$	40,502	$	156,730	$	144,901
Rail Technologies	25,587		23,486		72,226		64,230
Rail Technologies and Services	73,942		63,988		228,956		209,131
Fabricated Steel Products	25,810		22,138		85,754		66,109
Precast Concrete Products	17,972		15,745		50,723		42,816
Coatings and Measurement	12,329		16,494		35,222		63,779
Infrastructure Solutions	56,111		54,377		171,699		172,704
Total net sales	$	130,053	$	118,365	$	400,655	$	381,835

Net sales by the timing of the transfer of products and services was as follows for the periods presented:

	Three Months Ended September 30, 2021
	Rail Technologies and Services		Infrastructure Solutions		Total
Point in time	$	54,470	$	29,007	$	83,477
Over time	19,472		27,104		46,576
Total net sales	$	73,942	$	56,111	$	130,053
	Three Months Ended September 30, 2020
	Rail Technologies and Services		Infrastructure Solutions		Total
Point in time	$	47,027	$	33,222	$	80,249
Over time	16,961		21,155		38,116
Total net sales	$	63,988	$	54,377	$	118,365

	Nine Months Ended September 30, 2021
	Rail Technologies and Services		Infrastructure Solutions		Total
Point in time	$	178,225	$	103,308	$	281,533
Over time	50,731		68,391		119,122
Total net sales	$	228,956	$	171,699	$	400,655
	Nine Months Ended September 30, 2020
	Rail Technologies and Services		Infrastructure Solutions		Total
Point in time	$	163,190	$	112,206	$	275,396
Over time	45,941		60,498		106,439
Total net sales	$	209,131	$	172,704	$	381,835