Quarterly report pursuant to Section 13 or 15(d)

Business and Organization (Details)

v2.4.0.6
Business and Organization (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2012
Entity
Mar. 31, 2011
Dec. 31, 2011
Entity
Additional Business and Organization (Textual) [Abstract]      
Number of business acquisitions completed 3   5
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  
Electric Power Division [Member] | CANADA
     
Additional Business and Organization (Textual) [Abstract]      
Number of business acquisitions completed 1   3
Electric Power Division [Member] | UNITED STATES
     
Additional Business and Organization (Textual) [Abstract]      
Number of business acquisitions completed 1   1
Natural Gas and Pipeline Division [Member] | UNITED STATES
     
Additional Business and Organization (Textual) [Abstract]      
Number of business acquisitions completed 1