Quarterly report pursuant to Section 13 or 15(d)

Business and Organization (Details)

v2.4.0.6
Business and Organization (Details)
3 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended
Mar. 31, 2012
Entity
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Entity
Mar. 31, 2012
Electric Power Division [Member]
CANADA
Entity
Dec. 31, 2011
Electric Power Division [Member]
CANADA
Entity
Jun. 30, 2012
Electric Power Division [Member]
UNITED STATES
Entity
Mar. 31, 2012
Electric Power Division [Member]
UNITED STATES
Entity
Dec. 31, 2011
Electric Power Division [Member]
UNITED STATES
Entity
Mar. 31, 2012
Natural Gas and Pipeline Division [Member]
UNITED STATES
Entity
Additional Business and Organization (Textual) [Abstract]                    
Number of business acquisitions completed 3     5 1 3 1 1 1 1
Business and Organization (Textual) [Abstract]                    
Fiber Optic Licensing Terms, Minimum in years   5 years 5 years              
Fiber Optic Licensing Terms, Maximum in years   25 years 25 years