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Bank segment - Comprehensive income data (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Condensed Statement of Income Captions [Line Items] |  |  |
Net income | [1] | $ 32,339 | $ 46,260
Net unrealized gains (losses) on securities: |  |  |
Net unrealized gains losses on available-for-sale investment securities arising during the period, net of tax benefits of $2,278 and $1,664 for the respective periods |  | 3,451 | 2,520
Less: reclassification adjustment for net realized gains included in net income, net of taxes of nil and $1,132 for the respective periods |  | 0 | (1,715)
Retirement benefit plans: |  |  |
Less: amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $259 and $144 for the respective periods |  | 5,459 | 2,813
Other comprehensive income, net of taxes |  | 4,058 | 1,167
Comprehensive income |  | 35,924 | 46,954
Net unrealized gains (losses) on securities arising during the period, taxes |  | (2,278) | (1,664)
Less: reclassification adjustment for net realized gains included in net income, taxes |  | 0 | (1,132)
Less: amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits |  | (3,486) | (1,796)
American Savings Bank (ASB) |  |  |
Condensed Statement of Income Captions [Line Items] |  |  |
Net income |  | 13,475 | 14,399
Net unrealized gains (losses) on securities: |  |  |
Net unrealized gains losses on available-for-sale investment securities arising during the period, net of tax benefits of $2,278 and $1,664 for the respective periods |  | 3,451 | 2,520
Less: reclassification adjustment for net realized gains included in net income, net of taxes of nil and $1,132 for the respective periods |  | 0 | (1,715)
Retirement benefit plans: |  |  |
Less: amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $259 and $144 for the respective periods |  | 392 | 219
Other comprehensive income, net of taxes |  | 3,843 | 1,024
Comprehensive income |  | 17,318 | 15,423
Net unrealized gains (losses) on securities arising during the period, taxes |  | 2,278 | 1,664
Less: reclassification adjustment for net realized gains included in net income, taxes |  | 0 | 1,132
Less: amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits |  | $ 259 | $ (144)
[1] | As restated - See Note 1, “Basis of presentation - Restatement of previously issued financial statements.”

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