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SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Details 3) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Cash flows from operating activities |  |  |
Net income | $ 140,120,000 | $ 115,425,000 | $ 84,901,000
Adjustments to reconcile net income to net cash provided by operating activities |  |  |
Depreciation of property, plant and equipment | 148,152,000 | 154,523,000 | 151,282,000
Changes in deferred income taxes | 79,444,000 | 97,791,000 | 12,787,000
Changes in excess tax benefits from share-based payment arrangements | 35,000 | 45,000 | 310,000
Changes in assets and liabilities |  |  |
Increase (decrease) in accounts, interest and dividends payable | (34,480,000) | 22,410,000 | (12,472,000)
Changes in other assets and liabilities | (26,094,000) | 36,270,000 | (39,491,000)
Contributions to defined benefit pension and other postretirement benefit plans | (74,961,000) | (31,792,000) | (25,354,000)
Net cash provided by operating activities | 250,366,000 | 340,717,000 | 268,586,000
Cash flows from investing activities |  |  |
Capital expenditures | (235,116,000) | (182,125,000) | (288,879,000)
Other | (2,974,000) | 5,092,000 | 1,199,000
Net cash provided by (used in) investing activities | (326,787,000) | (278,734,000) | 457,508,000
Cash flows from financing activities |  |  |
Net increase (decrease) in short-term borrowings with original maturities of three months or less | 43,898,000 | (17,066,000) | 41,989,000
Proceeds from issuance of long-term debt | 125,000,000 |  | 153,186,000
Changes in excess tax benefits from share-based payment arrangements | (35,000) | (45,000) | (310,000)
Net proceeds from issuance of common stock | 15,979,000 | 22,706,000 | 15,329,000
Common stock dividends | (106,812,000) | (93,034,000) | (96,843,000)
Net cash provided by (used in) financing activities | 16,035,000 | (235,254,000) | (405,607,000)
Net increase (decrease) in cash and cash equivalents | (60,386,000) | (173,271,000) | 320,487,000
Cash and cash equivalents, January 1 | 330,651,000 | 503,922,000 | 183,435,000
Cash and cash equivalents, December 31 | 270,265,000 | 330,651,000 | 503,922,000
Common stock dividends reinvested by shareholders | 21,217,000 | 37,296,000 | 27,701,000
Common Stock Including Additional Paid in Capital [Member] |  |  |
Cash flows from financing activities |  |  |
Common stock dividends reinvested by shareholders | 21,217,000 | 37,296,000 | 27,701,000
Hawaiian Electric Industries, Inc. |  |  |
Cash flows from operating activities |  |  |
Net income | 138,230,000 | 113,535,000 | 83,011,000
Adjustments to reconcile net income to net cash provided by operating activities |  |  |
Equity in net income | (158,722,000) | (134,470,000) | (100,896,000)
Common stock dividends/distributions received from subsidiaries | 128,558,000 | 110,769,000 | 105,128,000
Depreciation of property, plant and equipment | 227,000 | 320,000 | 409,000
Other amortization | 981,000 | 625,000 | 373,000
Changes in deferred income taxes | 276,000 | (1,432,000) | (78,000)
Changes in excess tax benefits from share-based payment arrangements | 35,000 | 45,000 | 310,000
Changes in assets and liabilities |  |  |
Decrease (increase) in accounts receivable | 412,000 | (148,000) | 213,000
Increase (decrease) in accounts, interest and dividends payable | 1,324,000 | 936,000 | 165,000
Changes in prepaid and accrued income taxes | 3,550,000 | (1,897,000) | (2,799,000)
Changes in other assets and liabilities | 5,183,000 | 4,381,000 | 4,922,000
Contributions to defined benefit pension and other postretirement benefit plans | (1,785,000) | (724,000) | (1,267,000)
Net cash provided by operating activities | 118,269,000 | 91,940,000 | 89,491,000
Cash flows from investing activities |  |  |
Net decrease (increase) in notes receivables from subsidiaries |  |  | 10,464,000
Capital expenditures | (110,000) | (84,000) | (246,000)
Investments in subsidiaries | (40,000,000) | (4,364,000) | (61,969,000)
Other | (4,206,000) |  |
Net cash provided by (used in) investing activities | (44,316,000) | (4,448,000) | (51,751,000)
Cash flows from financing activities |  |  |
Net increase (decrease) in notes payable to subsidiaries with original maturities of three months or less | (1,757,000) | (1,428,000) | (2,120,000)
Net increase (decrease) in short-term borrowings with original maturities of three months or less | 43,897,000 | (17,066,000) | 41,989,000
Proceeds from issuance of long-term debt | 125,000,000 |  |
Repayments of short-term borrowings with original maturities greater than three months | (150,000,000) |  |
Changes in excess tax benefits from share-based payment arrangements | (35,000) | (45,000) | (310,000)
Net proceeds from issuance of common stock | 15,979,000 | 22,706,000 | 15,329,000
Common stock dividends | (106,812,000) | (93,034,000) | (96,843,000)
Net cash provided by (used in) financing activities | (73,728,000) | (88,867,000) | (41,955,000)
Net increase (decrease) in cash and cash equivalents | 225,000 | (1,375,000) | (4,215,000)
Cash and cash equivalents, January 1 | 1,540,000 | 2,915,000 | 7,130,000
Cash and cash equivalents, December 31 | 1,765,000 | 1,540,000 | 2,915,000
Value of stock converted to equity in noncash transaction | 1,300,000 | 1,100,000 | 1,300,000
Hawaiian Electric Industries, Inc. | Common Stock Including Additional Paid in Capital [Member] |  |  |
Cash flows from financing activities |  |  |
Common stock dividends reinvested by shareholders | $ 12,000,000 | $ 23,000,000 | $ 17,000,000

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