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Reconciliation of electric utility operating income per HEI and HECO consolidated statements of income (Details) - HECO (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Operating income from regulated and nonregulated activities before income taxes (per HEI consolidated statements of income) | $ 82,370 | $ 79,406 | $ 153,027 | $ 155,222
Income taxes on regulated activities | (23,654) | (22,824) | (42,316) | (44,122)
Electric utility |  |  |  |
Operating income from regulated and nonregulated activities before income taxes (per HEI consolidated statements of income) | 61,138 | 61,496 | 114,091 | 118,750
Income taxes on regulated activities | (18,325) | (18,626) | (32,719) | (36,034)
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |
Operating income | 28,171 | 28,297 | 49,012 | 53,233
Hawaiian Electric Company, Inc. and Subsidiaries | Electric utility |  |  |  |
Operating income from regulated and nonregulated activities before income taxes (per HEI consolidated statements of income) | 61,138 | 61,496 | 114,091 | 118,750
Income taxes on regulated activities | (18,333) | (18,574) | (32,428) | (35,939)
Revenues from nonregulated activities | (1,895) | (1,867) | (4,971) | (3,539)
Add: Expenses from nonregulated activities | 955 | 452 | 1,719 | 816
Operating income | $ 41,865 | $ 41,507 | $ 78,411 | $ 80,088

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