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Bank subsidiary (HEI only) (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Net income | $ 39,486 | $ 48,707 | $ 41,061 | $ 34,152 | $ 14,309 | $ 48,177 | $ 39,273 | $ 38,789 | $ 163,406 | $ 140,548 | $ 140,120
Net unrealized gains (losses) on securities: |  |  |  |  |  |  |  |  |  |  |
Net unrealized gains (losses) on securities arising during the period, net of (taxes) benefits of $9,037, ($631) and ($4,343) for 2013, 2012 and 2011, respectively |  |  |  |  |  |  |  |  | (13,686) | 956 | 6,578
Net unrealized gains (losses) on securities arising during the period, taxes |  |  |  |  |  |  |  |  | 9,037 | (631) | (4,343)
Less: reclassification adjustment for net realized gains included in net income, net of taxes of $488, $53 and $148 for 2013, 2012 and 2011, respectively |  |  |  |  |  |  |  |  | (738) | (81) | (224)
Less: reclassification adjustment for net realized gains included in net income, taxes |  |  |  |  |  |  |  |  | (488) | (53) | (148)
Retirement benefit plans: |  |  |  |  |  |  |  |  |  |  |
Net gains (losses) arising during the period, net of (taxes) benefits of ($10,450), $5,240 and $6,577 for 2013, 2012 and 2011, respectively |  |  |  |  |  |  |  |  | 223,177 | (99,159) | (130,191)
Net gains (losses) arising during the period, tax benefits |  |  |  |  |  |  |  |  | (142,478) | 63,303 | 83,147
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 $1,187, $684 and $346 for 2013, 2012 and 2011, respectively |  |  |  |  |  |  |  |  | 23,280 | 15,291 | 9,364
Less: amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits |  |  |  |  |  |  |  |  | 14,870 | 9,764 | 5,976
Other comprehensive income (loss), net of taxes |  |  |  |  |  |  |  |  | 9,673 | (7,286) | (6,665)
Comprehensive income attributable to Hawaiian Electric |  |  |  |  |  |  |  |  | 171,189 | 131,372 | 131,565
American Savings Bank (ASB) |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 57,534 | 58,637 | 59,843
Net unrealized gains (losses) on securities: |  |  |  |  |  |  |  |  |  |  |
Net unrealized gains (losses) on securities arising during the period, net of (taxes) benefits of $9,037, ($631) and ($4,343) for 2013, 2012 and 2011, respectively |  |  |  |  |  |  |  |  | (13,686) | 956 | 6,578
Net unrealized gains (losses) on securities arising during the period, taxes |  |  |  |  |  |  |  |  | 9,037 | (631) | (4,343)
Less: reclassification adjustment for net realized gains included in net income, net of taxes of $488, $53 and $148 for 2013, 2012 and 2011, respectively |  |  |  |  |  |  |  |  | (738) | (81) | (224)
Less: reclassification adjustment for net realized gains included in net income, taxes |  |  |  |  |  |  |  |  | (488) | (53) | (148)
Retirement benefit plans: |  |  |  |  |  |  |  |  |  |  |
Net gains (losses) arising during the period, net of (taxes) benefits of ($10,450), $5,240 and $6,577 for 2013, 2012 and 2011, respectively |  |  |  |  |  |  |  |  | 15,826 | (7,936) | (9,960)
Net gains (losses) arising during the period, tax benefits |  |  |  |  |  |  |  |  | (10,450) | 5,240 | 6,577
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 $1,187, $684 and $346 for 2013, 2012 and 2011, respectively |  |  |  |  |  |  |  |  | 1,797 | 1,036 | 523
Less: amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits |  |  |  |  |  |  |  |  | 1,187 | 684 | 346
Other comprehensive income (loss), net of taxes |  |  |  |  |  |  |  |  | 3,199 | (6,025) | (3,083)
Comprehensive income attributable to Hawaiian Electric |  |  |  |  |  |  |  |  | $ 60,733 | $ 52,612 | $ 56,760

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