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