Customer Contracts (Details Textual) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended					3 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2013 SME [Member]	Jun. 30, 2012 SME [Member]	Jun. 30, 2013 S.M. Electric Company [Member]	Jun. 30, 2012 S.M. Electric Company [Member]	Jun. 30, 2013 Western Canada Aboveground Storage Tank Project [Member]	Dec. 31, 2012 Western Canada Aboveground Storage Tank Project [Member]	Jun. 30, 2013 Western Canada Aboveground Storage Tank Project [Member]
Business Acquisition [Line Items]
Record amount of claims		$ 0.7	$ 0.7
Contracts Receivable, Claims and Uncertain Amounts, Expected to be Collected in Next Rolling Twelve Months				2.9	2.9
Pretax charge on a Canadian project						0.6	3.3	3.7
Change In Accounting Estimate, Financial Effect, Net Income								2.4
Change In Accounting Estimate, Financial Effect, Diluted Earnings Per Share								$ 0.10
Loss Contingency, Damages Awarded, Value	1.5
Loss Contingency Accrual, Carrying Value, Period Increase (Decrease)	$ 1.0