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Shareholders' equity - Reclassification out of AOCI (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total revenues | $ 632,281 | $ 566,244 | $ 1,223,843 | $ 1,117,204
Interest expense | 20,440 | 17,301 | 40,008 | 37,427
Total reclassifications | 349 | (63) | 1,111 | 307
Electric utility |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total revenues | 556,875 | 495,395 | 1,075,486 | 977,447
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total revenues | 556,875 | 495,395 | 1,075,486 | 977,447
Total reclassifications | 40 | (10) | 499 | 4
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total reclassifications | 3,930 | 3,698 | 7,851 | 7,236
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost | Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total reclassifications | 3,621 | 3,391 | 7,239 | 6,627
Impact of D&Os of the PUC included in regulatory assets |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total reclassifications | 3,581 | 3,401 | 7,194 | 6,623
Impact of D&Os of the PUC included in regulatory assets | Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total reclassifications | 3,581 | 3,401 | 7,194 | 6,623
Reclassification out of Accumulated Other Comprehensive Income | Net unrealized gains (losses) on securities |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Revenues-bank (net gains on sales of securities) | 0 | 360 | 0 | 360
Reclassification out of Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivatives | Interest rate contracts |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Interest expense | 0 | 0 | 0 | 54
Reclassification out of Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivatives | Electric utility | Forward commitments |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total revenues | 0 | 0 | 454 | 0
Reclassification out of Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivatives | Hawaiian Electric Company, Inc. and Subsidiaries | Electric utility | Forward commitments |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total revenues | $ 0 | $ 0 | $ 454 | $ 0

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