Revenue Recognition (Tables)

9 Months Ended

Feb. 28, 2021

Disaggregation Of Revenue [Line Items]

Revenue by Product Class and Over Time

The following table summarizes net sales by product class for the periods presented:

	Three Months Ended					Nine Months Ended
(in thousands)	February 28, 2021			February 29, 2020		February 28, 2021		February 29, 2020
Reportable segments by product class:
Steel Processing
Direct	$	469,266		$	450,413	$	1,307,631	$	1,425,117
Toll		35,211			40,723		96,589		106,331
Total		504,477			491,136		1,404,220		1,531,448
Pressure Cylinders
Consumer products		120,808			113,258		375,208		360,803
Industrial products		129,428			129,042		391,673		411,994
Oil & gas equipment		4,407			28,695		20,950		92,730
Total		254,643			270,995		787,831		865,527
Other
Engineered Cabs		(12	)		1,830		1,058		50,446
Other		1			35		1		71
Total		(11	)		1,865		1,059		50,517
Total	$	759,109		$	763,996	$	2,193,110	$	2,447,492

Summary of Unbilled Receivable and Contract Assets

The following table summarizes the unbilled receivables and contract assets at the dates indicated:

		February 28,		May 31,
(in thousands)	Balance Sheet Classification	2021		2020
Unbilled receivables	Receivables	$	6,148	$	5,552
Contract assets	Prepaid and other current assets	$	-	$	4,127

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				Nine Months Ended
(in thousands)	February 28, 2021		February 29, 2020		February 28, 2021		February 29, 2020
Steel Processing - toll	$	35,211	$	40,723	$	96,589	$	106,331
Pressure Cylinders - certain oil & gas equipment contracts		3,600		25,885		15,666		83,424
Total over time revenue	$	38,811	$	66,608	$	112,255	$	189,755