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Schedule I - Condensed Financial Information of Parent - Footnotes Basis of Presentation and Significant Accounting Policies (Policies)
12 Months Ended
Dec. 31, 2012
Significant Accounting Policies  
Principles of Consolidation
Principles of Consolidation
 
IDACORP’s and Idaho Power’s consolidated financial statements include the accounts of each company, the subsidiaries that the companies control, and any variable interest entities (VIEs) for which the companies are the primary beneficiaries.  Intercompany balances have been eliminated in consolidation.  Investments in subsidiaries that the companies do not control and investments in VIEs for which the companies are not the primary beneficiaries, but have the ability to exercise significant influence over operating and financial policies, are accounted for using the equity method of accounting.
 
The entities that IDACORP and Idaho Power consolidate consist primarily of the wholly-owned subsidiaries discussed above.  In addition, IDACORP consolidates one VIE, Marysville Hydro Partners (Marysville), which is a joint venture owned 50 percent by Ida-West and 50 percent by Environmental Energy Company (EEC).  At December 31, 2012, Marysville had approximately $20 million of assets, primarily a hydroelectric plant, and approximately $15 million of intercompany long-term debt, which is eliminated in consolidation.  EEC has borrowed amounts from Ida-West to fund a portion of its required capital contributions to Marysville.  The loans are payable from EEC’s share of distributions and are secured by the stock of EEC and EEC’s interest in Marysville.  Ida-West is the primary beneficiary because the ownership of the intercompany note and the EEC note result in it controlling the entity.  Creditors of Marysville have no recourse to the general credit of IDACORP and there are no other arrangements that could require IDACORP to provide financial support to Marysville or expose IDACORP to losses.
 
The BCC joint venture is also a VIE, but because the power to direct the activities that most significantly impact the economic performance of BCC is shared with the joint venture partner, the company is not the primary beneficiary.  The carrying value of BCC was $94 million at December 31, 2012, and Idaho Power's maximum exposure to loss is the carrying value, any additional future contributions to BCC, and a $66 million guarantee for mine reclamation costs, which is discussed further in Note 9.
 
IFS's investments in affordable housing and other real estate are also VIEs for which IDACORP is not the primary beneficiary.  IFS's limited partnership interests range from 5 to 99 percent and were acquired between 1996 and 2010.  As a limited partner, IFS does not control these entities and they are not consolidated.  IFS’s maximum exposure to loss in these developments is limited to its net carrying value, which was $51 million at December 31, 2012.
IDACORP
 
Significant Accounting Policies  
Basis of Presentation and Significant Accounting Policies [Text Block]
Pursuant to rules and regulations of the Securities and Exchange Commission, the unconsolidated condensed financial statements of IDACORP, Inc. do not reflect all of the information and notes normally included with financial statements prepared in accordance with accounting principles generally accepted in the United States of America.  Therefore, these financial statements should be read in conjunction with the consolidated financial statements and related notes included in the 2012 Form 10-K, Part II, Item 8.
Principles of Consolidation
Accounting for Subsidiaries: IDACORP has accounted for the earnings of its subsidiaries under the equity method in the unconsolidated condensed financial statements.