Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Carrying value of goodwill by segment
Goodwill			$ 53,675
Cumulative impairment loss			(25,000)
Net Goodwill	30,836	28,675
Purchase of Kvaerner North American Construction and Pelichem	39,076	2,247
Translation adjustment	(75)	(86)
Net Goodwill	69,837	30,836
Electrical Infrastructure [Member]
Carrying value of goodwill by segment
Goodwill			29,666
Cumulative impairment loss			(17,653)
Net Goodwill	12,013		12,013
Purchase of Kvaerner North American Construction and Pelichem	31,259
Translation adjustment	(29)
Net Goodwill	43,243		12,013
Oil Gas & Chemical [Member]
Carrying value of goodwill by segment
Goodwill			5,841
Cumulative impairment loss			(3,000)
Net Goodwill	5,088	2,841
Purchase of Kvaerner North American Construction and Pelichem	5,855	2,247
Net Goodwill	10,943	5,088
Storage Solutions [Member]
Carrying value of goodwill by segment
Goodwill			11,071
Cumulative impairment loss			(922)
Net Goodwill	10,063	10,149
Purchase of Kvaerner North American Construction and Pelichem	0
Translation adjustment	(36)	(86)
Net Goodwill	10,027	10,063
Industrial [Member]
Carrying value of goodwill by segment
Goodwill			7,097
Cumulative impairment loss			(3,425)
Net Goodwill	3,672	3,672
Purchase of Kvaerner North American Construction and Pelichem	1,962	0
Translation adjustment	(10)
Net Goodwill	$ 5,624	$ 3,672