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Information By Business Segments
9 Months Ended
Sep. 30, 2011
Information By Business Segments [Abstract] 
Information By Business Segments

NOTE 12. INFORMATION BY BUSINESS SEGMENTS

The business segment presentation reflects the basis used by the Company's management to analyze performance and determine the allocation of resources. Avista Utilities' business is managed based on the total regulated utility operation. Ecova (formerly Advantage IQ) is a provider of energy efficiency and cost management programs and services for multi-site customers throughout North America. The Other category, which is not a reportable segment, includes sheet metal fabrication, venture fund investments and real estate investments, Spokane Energy, as well as certain other operations of Avista Capital.