GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2016

GOODWILL AND OTHER INTANGIBLE ASSETS

Changes in goodwill allocated to reportable segments

	Mechanical		Electrical
	Solutions		Solutions		Services
(in thousands)	Segment		Segment		Segment		Total
Balance as of January 1, 2015	$	26,016	$	13,501	$	48,396	$	87,913
Impairment		(23,284)		(13,501)		(809)		(37,594)
Balance as of December 31, 2015		2,732		—		47,587		50,319
Sale of business		(1,676)		—		—		(1,676)
Goodwill reclassified to assets held for sale		—		—		(12,187)		(12,187)
Balance as of December 31, 2016	$	1,056	$	—	$	35,400	$	36,456

Schedule of other intangible assets

		December 31, 2016						December 31, 2015
	Weighed	Gross						Gross
	Average	Carrying		Accumulated				Carrying		Accumulated
($ in thousands)	life	Amount		Amortization		Net		Amount		Amortization		Net
Customer relationships	8.5 years	$	19,600	$	(9,610)	$	9,990	$	38,500	$	(14,963)	$	23,537
Non-compete agreements	5 years		1,716		(1,405)		311		3,016		(1,755)		1,261
Backlog	1.1 years		320		(320)		—		320		(145)		175
Trade names	Indefinite		14,500		—		14,500		19,030		—		19,030
Total		$	36,136	$	(11,335)	$	24,801	$	60,866	$	(16,863)	$	44,003

Schedule of other intangible assets

		December 31, 2016						December 31, 2015
	Weighed	Gross						Gross
	Average	Carrying		Accumulated				Carrying		Accumulated
($ in thousands)	life	Amount		Amortization		Net		Amount		Amortization		Net
Customer relationships	8.5 years	$	19,600	$	(9,610)	$	9,990	$	38,500	$	(14,963)	$	23,537
Non-compete agreements	5 years		1,716		(1,405)		311		3,016		(1,755)		1,261
Backlog	1.1 years		320		(320)		—		320		(145)		175
Trade names	Indefinite		14,500		—		14,500		19,030		—		19,030
Total		$	36,136	$	(11,335)	$	24,801	$	60,866	$	(16,863)	$	44,003

Schedule of estimated future aggregate amortization expense of intangible assets

December 31,		(in thousands)
2017	$	2,593
2018		2,411
2019		2,346
2020		1,998
2021		953
Thereafter		—
Total	$	10,301