Revenue (Tables)

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

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

	December 31,
	2019		2018
Rail Products	$	194,464	$	188,590
Rail Technologies	127,344		130,934
Rail Products and Services	321,808		319,524
Piling and Fabricated Bridge Products	114,076		102,246
Precast Concrete Products	68,410		56,407
Construction Products	182,486		158,653
Test, Inspection, and Threading Services	51,003		59,766
Protective Coatings and Measurement Systems	99,760		89,026
Tubular and Energy Services	150,763		148,792
Total net sales	$	655,057	$	626,969

For the years ended December 31, 2019 and 2018, net sales by the timing of the transfer of goods and services are as follows:

Year ended December 31, 2019	Rail Products and Services		Construction Products		Tubular and Energy Services		Total
Point in time	$	240,047	$	115,590	$	112,645	$	468,282
Over time	81,761		66,896		38,118		186,775
Total net sales	$	321,808	$	182,486	$	150,763	$	655,057
Year ended December 31, 2018	Rail Products and Services		Construction Products		Tubular and Energy Services		Total
Point in time	$	232,814	$	106,168	$	124,734	$	463,716
Over time	86,710		52,485		24,058		163,253
Total net sales	$	319,524	$	158,653	$	148,792	$	626,969