Segment Information (Tables)

12 Months Ended

Jun. 30, 2017

Segment Reporting [Abstract]

Results of Operations

Results of Operations

(In thousands)

	Electrical Infrastructure			Oil Gas & Chemical			Storage Solutions		Industrial			Unallocated Corporate		Total
Twelve months ended June 30, 2017
Gross revenues	$	373,384		$	247,423		$	483,254	$	103,449		$	—	$	1,207,510
Less: inter-segment revenues	—			6,900			1,558		1,543			—		10,001
Consolidated revenues	373,384			240,523			481,696		101,906			—		1,197,509
Gross profit	7,137			12,675			55,651		5,540			—		81,003
Operating income (loss)	(8,309		)	(8,783		)	22,928		(977		)	—		4,859
Segment assets	183,351			129,177			166,742		53,754			53,006		586,030
Capital expenditures	1,390			829			2,017		38			7,634		11,908
Depreciation and amortization expense	5,198			6,299			7,277		2,828			—		21,602
Twelve months ended June 30, 2016
Gross revenues	$	349,011		$	252,973		$	564,738	$	149,744		$	—	$	1,316,466
Less: inter-segment revenues	—			3,178			1,226		145			—		4,549
Consolidated revenues	349,011			249,795			563,512		149,599			—		1,311,917
Gross profit	29,301			18,553			67,843		10,294			—		125,991
Operating income (loss)	11,144			(3,503		)	33,449		(208		)	—		40,882
Segment assets	135,298			91,350			201,875		67,569			68,875		564,967
Capital expenditures	1,611			1,481			3,882		104			6,861		13,939
Depreciation and amortization expense	5,008			4,811			8,124		3,498			—		21,441
Twelve months ended June 30, 2015
Gross revenues	$	257,930		$	310,826		$	504,155	$	281,319		$	—	$	1,354,230
Less: inter-segment revenues	—			5,466			1,032		4,597			—		11,095
Consolidated revenues	257,930			305,360			503,123		276,722			—		1,343,135
Gross profit (loss)	(31,444		)	25,394			58,085		35,335			—		87,370
Operating income (loss)	(44,293		)	7,064			29,069		16,962			—		8,802
Segment assets	129,725			108,960			172,857		102,761			47,386		561,689
Capital expenditures	579			3,858			2,396		1,139			7,801		15,773
Depreciation and amortization expense	4,915			4,772			7,298		6,495			—		23,480

Summary of revenues and long lived assets according to geographic areas

Geographical information is as follows:

	Revenues
	Twelve Months Ended
	June 30, 2017		June 30, 2016		June 30, 2015
	(In thousands)
United States	$	961,049	$	1,127,893	$	1,205,713
Canada	228,625		178,603		137,422
Other international	7,835		5,421		—
	$	1,197,509	$	1,311,917	$	1,343,135

	Long-Lived Assets
	June 30, 2017		June 30, 2016		June 30, 2015
	(In thousands)
United States	$	193,164	$	158,970	$	166,132
Canada	21,419		19,915		22,086
Other international	12,817		10,636		—
	$	227,400	$	189,521	$	188,218

Schedule of Revenue by Major Customers by Reporting Segments

Information about Significant Customers

	Significant Customers as a Percentage of Segment Revenues
	Consolidated		Electrical Infrastructure		Oil Gas & Chemical		Storage Solutions		Industrial
Twelve months ended June 30, 2017
Customer one	19.5	%	—	%	—	%	48.5	%	—	%
Customer two	15.3	%	46.0	%	—	%	2.4	%	—	%
Customer three	5.2	%	—	%	25.8	%	—	%	—	%
Customer four	4.2	%	—	%	20.7	%	—	%	—	%
Customer five	4.0	%	12.7	%	—	%	—	%	—	%
Customer six	2.7	%	—	%	—	%	—	%	31.7	%
Customer seven	2.2	%	—	%	—	%	—	%	25.8	%
Twelve months ended June 30, 2016
Customer one	14.8	%	38.9	%	—	%	10.2	%	—	%
Customer two	10.6	%	—	%	—	%	24.7	%	—	%
Customer three	8.3	%	—	%	—	%	19.3	%	—	%
Customer four	4.4	%	16.6	%	—	%	—	%	—	%
Customer five	4.2	%	—	%	—	%	—	%	36.9	%
Customer six	3.9	%	—	%	20.2	%	—	%	—	%
Customer seven	3.8	%	14.4	%	—	%	—	%	—	%
Customer eight	3.4	%	12.7	%	—	%	—	%	—	%
Customer nine	2.3	%	—	%	—	%	—	%	20.1	%
Customer ten	2.1	%	—	%	11.2	%	—	%	—	%
Customer eleven	1.6	%	—	%	—	%	—	%	14.0	%
Twelve months ended June 30, 2015
Customer one	12.3	%	—	%	—	%	33.0	%	—	%
Customer two	7.0	%	—	%	—	%	—	%	34.0	%
Customer three	6.5	%	12.7	%	—	%	10.9	%	—	%
Customer four	5.7	%	—	%	—	%	—	%	27.6	%
Customer five	4.8	%	25.1	%	—	%	—	%	—	%
Customer six	4.0	%	—	%	17.7	%	—	%	—	%
Customer seven	3.9	%	—	%	—	%	—	%	19.0	%
Customer eight	3.1	%	16.3	%	—	%	—	%	—	%
Customer nine	2.8	%	14.7	%	—	%	—	%	—	%
Customer ten	2.8	%	—	%	12.3	%	—	%	—	%
Customer eleven	2.4	%	12.7	%	—	%	—	%	—	%