Carrying Value of Goodwill by Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								3 Months Ended
	Sep. 30, 2012		Sep. 30, 2012 Electrical Infrastructure [Member]		Jun. 30, 2012 Electrical Infrastructure [Member]	Sep. 30, 2012 Oil Gas & Chemical [Member]		Jun. 30, 2012 Oil Gas & Chemical [Member]	Sep. 30, 2012 Storage Solutions [Member]		Sep. 30, 2012 Industrial [Member]
Goodwill [Line Items]
Goodwill	$ 53,675		$ 29,666			$ 5,841			$ 11,071		$ 7,097
Cumulative impairment loss	(25,000)	[1]	(17,653)	[1]		(3,000)	[1]		(922)	[1]	(3,425)	[1]
Balance, Beginning	28,675		12,013		12,013	2,841		2,841	10,149		3,672
Translation adjustment	88								88
Balance, Ending	$ 28,763		$ 12,013		$ 12,013	$ 2,841		$ 2,841	$ 10,237		$ 3,672

[1] A $25.0 million impairment charge was recorded in February 2005 as a result of the Company's operating performance in fiscal 2005.