Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Jun. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying amount of goodwill for fiscal year 2016 by operating segment are as follows:

	Gross									Gross
	Balance,		Accumulated			Balance,				Balance,		Accumulated			Balance,
	July 1,		Impairment			July 1,				June 30,		Impairment			June 30,
Operating Segment	2015		Losses			2015		Additions		2016		Losses			2016
Energy	$	28,506	$	(14,506	)	$	14,000	$	—	$	28,506	$	(14,506	)	$	14,000
Environmental	40,889		(17,865		)	23,024		—		40,889		(17,865		)	23,024
Infrastructure	7,224		(7,224		)	—		—		7,224		(7,224		)	—
Pipeline Services	—		—			—		60,294		60,294		(21,981		)	38,313
	$	76,619	$	(39,595	)	$	37,024	$	60,294	$	136,913	$	(61,576	)	$	75,337

The changes in the carrying amount of goodwill for fiscal year 2015 by operating segment are as follows:

	Gross									Gross
	Balance,		Accumulated			Balance,				Balance,		Accumulated			Balance,
	July 1,		Impairment			July 1,				June 30,		Impairment			June 30,
Operating Segment	2014		Losses			2014		Additions		2015		Losses			2015
Energy	$	27,836	$	(14,506	)	$	13,330	$	670	$	28,506	$	(14,506	)	$	14,000
Environmental	36,214		(17,865		)	18,349		4,675		40,889		(17,865		)	23,024
Infrastructure	7,224		(7,224		)	—		—		7,224		(7,224		)	—
	$	71,274	$	(39,595	)	$	31,679	$	5,345	$	76,619	$	(39,595	)	$	37,024

Schedule of Finite and Indefinite-Lived Intangible Assets

Identifiable intangible assets as of June 30, 2016 and 2015 were comprised of:

	June 30, 2016							June 30, 2015
	Gross					Net		Gross					Net
	Carrying		Accumulated			Carrying		Carrying		Accumulated			Carrying
Identifiable intangible assets	Amount		Amortization			Amount		Amount		Amortization			Amount
With determinable lives:
Customer relationships	$	59,218	$	(14,933	)	$	44,285	$	16,618	$	(7,740	)	$	8,878
Contract backlog	900		(525		)	375		—		—			—
Technology	1,000		(117		)	883		—		—			—
	61,118		(15,575		)	45,543		16,618		(7,740		)	8,878
With indefinite lives:
Engineering licenses	426		—			426		426		—			426
	$	61,544	$	(15,575	)	$	45,969	$	17,044	$	(7,740	)	$	9,304

Schedule of Expected Amortization Expense

Estimated amortization expense of intangible assets for future periods is as follows:

Fiscal Year		Amount
2017		$	10,159
2018		9,183
2019		8,367
2020		7,821
2021		7,274
2022 and thereafter		2,739
	Total	$	45,543