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Bank segment - Comprehensive income data (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Condensed Statement of Income Captions [Line Items] |  |  |  |
Net income | $ 44,601 | $ 35,491 | $ 77,426 | $ 67,830
Net unrealized gains (losses) on securities: |  |  |  |
Net unrealized gains (losses) on available-for-sale investment securities arising during the period, net of (taxes) benefits of ($1,925), $2,439, ($6,830) and $161 for the respective periods | 2,916 | (3,694) | 10,344 | (243)
Less: reclassification adjustment for net realized gains included in net income, net of taxes of $238, nil, $238 and nil for the respective periods | (360) | 0 | (360) | 0
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 $140, $255, $277 and $514 for the respective periods | 3,698 | 5,780 | 7,236 | 11,239
Other comprehensive income (loss), net of taxes | 2,108 | (3,127) | 10,908 | 931
Comprehensive income | 46,236 | 31,891 | 87,388 | 67,815
Net unrealized gains (losses) on securities arising during the period, taxes | 1,925 | (2,439) | 6,830 | (161)
Reclassification adjustment for net realized gain included in net income, taxes | 238 | 0 | 238 | 0
Less: amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits | (2,362) | (3,691) | (4,619) | (7,177)
American Savings Bank (ASB) |  |  |  |
Condensed Statement of Income Captions [Line Items] |  |  |  |
Net income | 13,285 | 12,851 | 25,958 | 26,326
Net unrealized gains (losses) on securities: |  |  |  |
Net unrealized gains (losses) on available-for-sale investment securities arising during the period, net of (taxes) benefits of ($1,925), $2,439, ($6,830) and $161 for the respective periods | 2,915 | (3,694) | 10,344 | (243)
Less: reclassification adjustment for net realized gains included in net income, net of taxes of $238, nil, $238 and nil for the respective periods | (360) | 0 | (360) | 0
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 $140, $255, $277 and $514 for the respective periods | 211 | 387 | 419 | 779
Other comprehensive income (loss), net of taxes | 2,766 | (3,307) | 10,403 | 536
Comprehensive income | 16,051 | 9,544 | 36,361 | 26,862
Net unrealized gains (losses) on securities arising during the period, taxes | (1,925) | 2,439 | (6,830) | 161
Reclassification adjustment for net realized gain included in net income, taxes | 238 | 0 | 238 | 0
Less: amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits | $ (140) | $ (255) | $ (277) | $ (514)

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