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Bank segment (HEI only) Statements of Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Net income | $ 33,630 | $ 48,286 | $ 41,894 | $ 46,400 | $ 39,486 | $ 48,707 | $ 41,061 | $ 34,152 | $ 170,210 | $ 163,406 | [1] | $ 140,548 | [1]
Net unrealized gains (losses) on available-for sale investment securities: |  |  |  |  |  |  |  |  |  |  |  |  |
Net unrealized gains (losses) on available-for sale investment securities arising during the period, net of (taxes) benefits of $(3,856), $9,037 and ($631) for 2014, 2013 and 2012, respectively |  |  |  |  |  |  |  |  | 5,840 | (13,686) |  | 956 |
Less: reclassification adjustment for net realized gains included in net income, net of taxes of $1,132, $488 and $53 for 2014, 2013 and 2012, respectively |  |  |  |  |  |  |  |  | (1,715) | (738) |  | (81) |
Retirement benefit plans: |  |  |  |  |  |  |  |  |  |  |  |  |
Net gains (losses) arising during the period, net of (taxes) benefits of $6,164, ($10,450) and $5,240 for 2014, 2013 and 2012, respectively |  |  |  |  |  |  |  |  | (234,166) | 223,177 |  | (99,159) |
Less: amortization of transition obligation, prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $561, $1,187 and $684 for 2014, 2013 and 2012, respectively |  |  |  |  |  |  |  |  | 11,344 | 23,280 |  | 15,291 |
Other comprehensive income (loss), net of taxes |  |  |  |  |  |  |  |  | (10,628) | 9,673 |  | (7,286) |
Comprehensive income attributable to Hawaiian Electric Industries, Inc. |  |  |  |  |  |  |  |  | 157,692 | 171,189 |  | 131,372 |
American Savings Bank (ASB) |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 51,492 | 57,534 |  | 58,637 |
Net unrealized gains (losses) on available-for sale investment securities: |  |  |  |  |  |  |  |  |  |  |  |  |
Net unrealized gains (losses) on available-for sale investment securities arising during the period, net of (taxes) benefits of $(3,856), $9,037 and ($631) for 2014, 2013 and 2012, respectively |  |  |  |  |  |  |  |  | 5,840 | (13,686) |  | 956 |
Less: reclassification adjustment for net realized gains included in net income, net of taxes of $1,132, $488 and $53 for 2014, 2013 and 2012, respectively |  |  |  |  |  |  |  |  | (1,715) | (738) |  | (81) |
Retirement benefit plans: |  |  |  |  |  |  |  |  |  |  |  |  |
Net gains (losses) arising during the period, net of (taxes) benefits of $6,164, ($10,450) and $5,240 for 2014, 2013 and 2012, respectively |  |  |  |  |  |  |  |  | (9,336) | 15,826 |  | (7,936) |
Less: amortization of transition obligation, prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $561, $1,187 and $684 for 2014, 2013 and 2012, respectively |  |  |  |  |  |  |  |  | 850 | 1,797 |  | 1,036 |
Other comprehensive income (loss), net of taxes |  |  |  |  |  |  |  |  | (4,361) | 3,199 |  | (6,025) |
Comprehensive income attributable to Hawaiian Electric Industries, Inc. |  |  |  |  |  |  |  |  | $ 47,131 | $ 60,733 |  | $ 52,612 |
[1] | As restated - See Note 1, “Summary of significant accounting policies - Revision and restatements of previously issued financial statements.”

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