XML 100 R66.htm IDEA: XBRL DOCUMENT v3.8.0.1
Electric utility segment - Consolidating Statement of Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Net income for common stock $ 32,370 $ 60,073 $ 38,661 $ 34,193 $ 44,634 $ 127,142 $ 44,128 $ 32,352 $ 165,297 $ 248,256 $ 159,877
Other comprehensive income (loss), net of taxes:                      
Effective portion of foreign currency hedge net unrealized gains (losses) arising during the period, net of (taxes) benefits of nil, $179 and nil for 2017, 2016 and 2015, respectively                 0 (281) 0
Reclassification adjustment to net income, net of (taxes) benefit                 454 (119) 235
Net gains (losses) arising during the period, net of (taxes) benefits of $(41,129), $27,703 and $(3,753) for 2017, 2016 and 2015, respectively                 65,531 (43,510) 5,889
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $10,041, $9,267 and $14,344 for 2017, 2016 and 2015, respectively                 15,737 14,518 22,465
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits of $49,523, $(18,206) and $16,011 for 2017, 2016 and 2015, respectively                 (78,724) 28,584 (25,139)
Other comprehensive income (loss), net of taxes                 (1,372) (6,867) 1,116
Comprehensive income attributable to Hawaiian Electric Company, Inc.                 163,925 241,389 160,993
Hawaiian Electric Company, Inc (HECO)                      
Net income for common stock                 119,951 142,317 135,714
Other comprehensive income (loss), net of taxes:                      
Effective portion of foreign currency hedge net unrealized gains (losses) arising during the period, net of (taxes) benefits of nil, $179 and nil for 2017, 2016 and 2015, respectively                   (281)  
Reclassification adjustment to net income, net of (taxes) benefit                 454 (173)  
Net gains (losses) arising during the period, net of (taxes) benefits of $(41,129), $27,703 and $(3,753) for 2017, 2016 and 2015, respectively                 63,105 (42,631) 5,638
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $10,041, $9,267 and $14,344 for 2017, 2016 and 2015, respectively                 14,477 13,254 20,381
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits of $49,523, $(18,206) and $16,011 for 2017, 2016 and 2015, respectively                 (78,724) 28,584 (25,139)
Other comprehensive income (loss), net of taxes                 (688) (1,247) 880
Comprehensive income attributable to Hawaiian Electric Company, Inc.                 119,263 141,070 136,594
Hawaii Electric Light Company, Inc. (HELCO)                      
Net income for common stock                 20,146 21,255 20,755
Other comprehensive income (loss), net of taxes:                      
Effective portion of foreign currency hedge net unrealized gains (losses) arising during the period, net of (taxes) benefits of nil, $179 and nil for 2017, 2016 and 2015, respectively                   0  
Reclassification adjustment to net income, net of (taxes) benefit                 0 0  
Net gains (losses) arising during the period, net of (taxes) benefits of $(41,129), $27,703 and $(3,753) for 2017, 2016 and 2015, respectively                 3,093 (5,141) (2,710)
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $10,041, $9,267 and $14,344 for 2017, 2016 and 2015, respectively                 1,903 1,718 2,728
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits of $49,523, $(18,206) and $16,011 for 2017, 2016 and 2015, respectively                 (4,994) 3,269 104
Other comprehensive income (loss), net of taxes                 2 (154) 122
Comprehensive income attributable to Hawaiian Electric Company, Inc.                 20,148 21,101 20,877
Maui Electric Company, Limited (MECO)                      
Net income for common stock                 17,911 21,136 22,165
Other comprehensive income (loss), net of taxes:                      
Effective portion of foreign currency hedge net unrealized gains (losses) arising during the period, net of (taxes) benefits of nil, $179 and nil for 2017, 2016 and 2015, respectively                   0  
Reclassification adjustment to net income, net of (taxes) benefit                 0 0  
Net gains (losses) arising during the period, net of (taxes) benefits of $(41,129), $27,703 and $(3,753) for 2017, 2016 and 2015, respectively                 7,329 (5,447) (1,352)
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $10,041, $9,267 and $14,344 for 2017, 2016 and 2015, respectively                 1,619 1,549 2,503
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits of $49,523, $(18,206) and $16,011 for 2017, 2016 and 2015, respectively                 (9,003) 3,852 (1,107)
Other comprehensive income (loss), net of taxes                 (55) (46) 44
Comprehensive income attributable to Hawaiian Electric Company, Inc.                 17,856 21,090 22,209
Other subsidiaries                      
Net income for common stock                 0 0 0
Other comprehensive income (loss), net of taxes:                      
Effective portion of foreign currency hedge net unrealized gains (losses) arising during the period, net of (taxes) benefits of nil, $179 and nil for 2017, 2016 and 2015, respectively                   0  
Reclassification adjustment to net income, net of (taxes) benefit                 0 0  
Net gains (losses) arising during the period, net of (taxes) benefits of $(41,129), $27,703 and $(3,753) for 2017, 2016 and 2015, respectively                 0 0 0
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $10,041, $9,267 and $14,344 for 2017, 2016 and 2015, respectively                 0 0 0
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits of $49,523, $(18,206) and $16,011 for 2017, 2016 and 2015, respectively                 0 0 0
Other comprehensive income (loss), net of taxes                 0 0 0
Comprehensive income attributable to Hawaiian Electric Company, Inc.                 0 0 0
Consolidating adjustments                      
Net income for common stock                 (38,057) (42,391) (42,920)
Other comprehensive income (loss), net of taxes:                      
Effective portion of foreign currency hedge net unrealized gains (losses) arising during the period, net of (taxes) benefits of nil, $179 and nil for 2017, 2016 and 2015, respectively                   0  
Reclassification adjustment to net income, net of (taxes) benefit                 0 0  
Net gains (losses) arising during the period, net of (taxes) benefits of $(41,129), $27,703 and $(3,753) for 2017, 2016 and 2015, respectively                 (10,422) 10,588 4,062
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $10,041, $9,267 and $14,344 for 2017, 2016 and 2015, respectively                 (3,522) (3,267) (5,231)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits of $49,523, $(18,206) and $16,011 for 2017, 2016 and 2015, respectively                 13,997 (7,121) 1,003
Other comprehensive income (loss), net of taxes                 53 200 (166)
Comprehensive income attributable to Hawaiian Electric Company, Inc.                 (38,004) (42,191) (43,086)
HECO Consolidated                      
Net income for common stock $ 25,355 $ 47,487 $ 25,644 $ 21,465 $ 34,119 $ 46,974 $ 35,857 $ 25,367 119,951 142,317 135,714
Other comprehensive income (loss), net of taxes:                      
Effective portion of foreign currency hedge net unrealized gains (losses) arising during the period, net of (taxes) benefits of nil, $179 and nil for 2017, 2016 and 2015, respectively                 0 (281) 0
Reclassification adjustment to net income, net of (taxes) benefit                 454 (173) 0
Net gains (losses) arising during the period, net of (taxes) benefits of $(41,129), $27,703 and $(3,753) for 2017, 2016 and 2015, respectively                 63,105 (42,631) 5,638
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $10,041, $9,267 and $14,344 for 2017, 2016 and 2015, respectively                 14,477 13,254 20,381
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits of $49,523, $(18,206) and $16,011 for 2017, 2016 and 2015, respectively                 (78,724) 28,584 (25,139)
Other comprehensive income (loss), net of taxes                 (688) (1,247) 880
Comprehensive income attributable to Hawaiian Electric Company, Inc.                 $ 119,263 $ 141,070 $ 136,594