Revenue Recognition (Tables)

6 Months Ended

Nov. 30, 2019

Disaggregation Of Revenue [Line Items]

Revenue by Product Class and Over Time

The following tables summarize net sales by product class for the periods presented:

	Three Months Ended				Six Months Ended
	November 30,				November 30,
(in thousands)	2019		2018		2019		2018
Reportable segments by product class:
Steel Processing
Direct	$	481,058	$	602,010	$	974,704	$	1,228,872
Toll		35,879		33,033		65,608		66,658
Total	$	516,937	$	635,043	$	1,040,312	$	1,295,530
Pressure Cylinders
Industrial products	$	130,334	$	152,018	$	282,952	$	304,865
Consumer products		128,065		117,194		247,545		234,017
Oil & gas equipment		31,737		25,235		64,035		55,918
Total	$	290,136	$	294,447	$	594,532	$	594,800
Other
Engineered Cabs	$	20,550	$	28,729	$	48,616	$	55,981
Other		14		7		36		22
Total	$	20,564	$	28,736	$	48,652	$	56,003
Total	$	827,637	$	958,226	$	1,683,496	$	1,946,333

Summary of Unbilled Receivable and Contract Assets

The following table summarizes the unbilled receivables and contract assets for the periods indicated:

(in thousands)	Balance Sheet Classification	November 30, 2019		May 31, 2019
Unbilled receivables	Receivables	$	5,538	$	5,366
Contract assets	Prepaid and other current assets	$	8,460	$	8,792

Over time revenue

Disaggregation Of Revenue [Line Items]

Revenue by Product Class and Over Time

The following table summarizes the over time revenue for the periods presented:

	Three Months Ended				Six Months Ended
	November 30,				November 30,
(in thousands)	2019		2018		2019		2018
Steel Processing - toll	$	35,879	$	33,033	$	65,608	$	66,658
Pressure Cylinders - certain oil & gas contracts		27,531		17,482		57,539		28,801
Total over time revenue	$	63,410	$	50,515	$	123,147	$	95,459