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Earnings per share and shareholders' equity (Details 3) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Interest expense | $ 18,906 | $ 20,022 | $ 38,006 | $ 39,478
Amortization of transition obligation, prior service credit and net losses recognized during the period in net periodic benefit cost | (5,780) | (2,873) | (11,239) | (5,686)
Less: reclassification adjustment for impact of D&Os of the PUC included in regulatory assets | 5,272 | 2,575 | 10,183 | 5,085
Amount reclassified from AOCI |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total reclassifications | 567 | 357 | 1,174 | (996)
Net unrealized gains (losses) on securities | Amount reclassified from AOCI |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Revenues-bank (net gains on sales of securities) | 0 | 0 | 0 | (1,715)
Derivatives qualified as cash flow hedges Interest rate contracts (settled in 2011) | Interest rate contracts | Amount reclassified from AOCI |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Interest expense | 59 | 59 | 118 | 118
Retirement benefit plans | Amount reclassified from AOCI |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Amortization of transition obligation, prior service credit and net losses recognized during the period in net periodic benefit cost | 5,780 | 2,873 | 11,239 | 5,686
Less: reclassification adjustment for impact of D&Os of the PUC included in regulatory assets | (5,272) | (2,575) | (10,183) | (5,085)
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Amortization of transition obligation, prior service credit and net losses recognized during the period in net periodic benefit cost | (5,257) | (2,588) | (10,190) | (5,107)
Less: reclassification adjustment for impact of D&Os of the PUC included in regulatory assets | 5,272 | 2,575 | 10,183 | 5,085
Hawaiian Electric Company, Inc. and Subsidiaries | Amount reclassified from AOCI |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total reclassifications | (15) | 13 | 7 | 22
Hawaiian Electric Company, Inc. and Subsidiaries | Retirement benefit plans | Amount reclassified from AOCI |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Amortization of transition obligation, prior service credit and net losses recognized during the period in net periodic benefit cost | 5,257 | 2,588 | 10,190 | 5,107
Less: reclassification adjustment for impact of D&Os of the PUC included in regulatory assets | $ (5,272) | $ (2,575) | $ (10,183) | $ (5,085)

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