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Consolidated Statements of Changes in Common Stock Equity - HECO (USD $) In Thousands, except Share data, unless otherwise specified | Total | Hawaiian Electric Company, Inc. and Subsidiaries | Common stock. Hawaiian Electric Company, Inc. and Subsidiaries | Premium on capital stock Hawaiian Electric Company, Inc. and Subsidiaries | Retained earnings Hawaiian Electric Company, Inc. and Subsidiaries | Accumulated other comprehensive income (loss) Hawaiian Electric Company, Inc. and Subsidiaries
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2010 | $ 1,480,394 | $ 1,334,155 | $ 92,224 | $ 389,609 | $ 851,613 | $ 709
Balance (in shares) at Dec. 31, 2010 |  |  | 13,831,000 |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Net income for common stock | 104,005 | 74,172 |  |  | 74,172 |
Other comprehensive income, net of taxes | 5,810 | 196 |  |  |  | 196
Common stock dividends | (88,750) | (52,919) |  |  | (52,919) |
Balance at Sep. 30, 2011 | 1,534,515 | 1,355,604 | 92,224 | 389,609 | 872,866 | 905
Balance (in shares) at Sep. 30, 2011 |  |  | 13,831,000 |  |  |
Balance at Jun. 30, 2011 |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Net income for common stock | 48,404 | 37,959 |  |  |  |
Other comprehensive income, net of taxes | 3,181 | 122 |  |  |  |
Balance at Sep. 30, 2011 | 1,534,515 | 1,355,604 | 92,224 | 389,609 |  |
Balance (in shares) at Sep. 30, 2011 |  |  | 13,831,000 |  |  |
Balance at Dec. 31, 2011 | 1,528,706 | 1,402,841 | 94,911 | 426,921 | 881,041 | (32)
Balance (in shares) at Dec. 31, 2011 | 96,038,328 |  | 14,234,000 |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Net income for common stock | 124,822 | 95,051 |  |  | 95,051 |
Other comprehensive income, net of taxes | 3,447 | 229 |  |  |  | 229
Common stock dividends | (89,902) | (54,783) |  |  | (54,783) |
Balance at Sep. 30, 2012 | 1,607,135 | 1,443,338 | 94,911 | 426,921 | 921,309 | 197
Balance (in shares) at Sep. 30, 2012 | 97,425,467 |  | 14,234,000 |  |  |
Balance at Jun. 30, 2012 |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Net income for common stock | 47,706 | 38,375 |  |  |  |
Other comprehensive income, net of taxes | 1,586 | 77 |  |  |  |
Balance at Sep. 30, 2012 | $ 1,607,135 | $ 1,443,338 | $ 94,911 | $ 426,921 |  |
Balance (in shares) at Sep. 30, 2012 | 97,425,467 |  | 14,234,000 |  |  |

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