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Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Net income for common stock | $ 46,054 | $ 38,661 | $ 86,301 | $ 72,854
Net unrealized gains (losses) on available-for-sale investment securities: |  |  |  |
Net unrealized gain (losses) on available-for-sale investment securities arising during the period, net of taxes | (4,348) | 2,021 | (17,645) | 2,244
Derivatives qualifying as cash flow hedges: |  |  |  |
Reclassification adjustment to net income, net of tax benefits | 0 | 0 | 0 | 454
Retirement benefit plans: |  |  |  |
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits | 5,350 | 3,930 | 10,496 | 7,851
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes | (4,827) | (3,581) | (9,449) | (7,194)
Other comprehensive income (loss), net of taxes | (3,825) | 2,370 | (16,598) | 3,355
Comprehensive income attributable to Hawaiian Electric Industries, Inc. | 42,229 | 41,031 | 69,703 | 76,209
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |
Net income for common stock | 31,169 | 25,644 | 58,644 | 47,109
Derivatives qualifying as cash flow hedges: |  |  |  |
Reclassification adjustment to net income, net of tax benefits | 0 | 0 | 0 | 454
Retirement benefit plans: |  |  |  |
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits | 4,853 | 3,621 | 9,506 | 7,239
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes | (4,827) | (3,581) | (9,449) | (7,194)
Other comprehensive income (loss), net of taxes | 26 | 40 | 57 | 499
Comprehensive income attributable to Hawaiian Electric Industries, Inc. | $ 31,195 | $ 25,684 | $ 58,701 | $ 47,608

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