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Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
Statement of Comprehensive Income [Abstract] |  |
Net income for common stock | $ 32,352 | $ 31,866
Net unrealized gains on available-for-sale investment securities: |  |
Net unrealized gains on available-for-sale investment securities arising during the period, net of tax benefits of $4,905 and 2,278 for the respective periods | 7,428 | 3,451
Derivatives qualified as cash flow hedges: |  |
Effective portion of foreign currency hedge net unrealized gain, net of taxes of $638 and nil for the respective periods | 1,002 | 0
Less: reclassification adjustment to net income, net of tax benefits of $35 and $37 for the respective periods | 54 | 59
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 $2,257 and $3,486 for the respective periods | 3,538 | 5,459
Less: reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes of $2,052 and $3,127 for the respective periods | (3,222) | (4,911)
Other comprehensive income, net of taxes | 8,800 | 4,058
Comprehensive income attributable to Hawaiian Electric Industries, Inc. | $ 41,152 | $ 35,924

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