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Consolidated Balance Sheets - HECO - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Property, plant and equipment, net    
Total property, plant and equipment, net $ 4,603,465 $ 4,377,658
Assets, Current [Abstract]    
Total assets 12,425,506 11,782,018
Capitalization and liabilities    
Common stock equity 1,660,910 1,629,136
Cumulative preferred stock – not subject to mandatory redemption 0 0
Commitments and contingencies
Liabilities    
Interest and dividends payable 25,225 26,042
Deferred credits and other liabilities    
Deferred income taxes 728,806 680,877
Contributions in aid of construction 543,525 506,087
Total capitalization and liabilities 12,425,506 11,782,018
Hawaiian Electric Company, Inc. and Subsidiaries    
Property, plant and equipment, net    
Land 53,153 52,792
Plant and equipment 6,605,732 6,315,698
Less accumulated depreciation (2,369,282) (2,266,004)
Construction in progress 211,742 175,309
Utility property, plant and equipment, net 4,501,345 4,277,795
Non-utilities, Property, Plant and Equipment, Net 7,407 7,272
Total property, plant and equipment, net 4,508,752 4,285,067
Assets, Current [Abstract]    
Cash and cash equivalents 74,286 24,449
Customer accounts receivable, net 123,688 132,778
Accrued unbilled revenues, net 91,693 84,509
Other accounts receivable, net 5,233 10,408
Fuel oil stock, at average cost 66,430 71,216
Materials and supplies, at average cost 53,679 54,429
Prepayments and other 23,100 36,640
Regulatory assets 66,032 72,231
Total current assets 504,141 486,660
Regulatory assets 891,419 824,500
Unamortized debt expense 208 497
Other 70,908 75,486
Total other long-term assets 962,535 900,483
Total assets 5,975,428 5,672,210
Capitalization and liabilities    
Common stock equity 1,799,787 1,728,325
Cumulative preferred stock – not subject to mandatory redemption 34,293 34,293
Commitments and contingencies
Long-term debt, net 1,319,260 1,278,702
Total capitalization 3,153,340 3,041,320
Liabilities    
Accounts payable 117,814 114,846
Interest and dividends payable 22,838 23,111
Taxes accrued 172,730 191,084
Regulatory liabilities 3,762 2,204
Other 55,221 54,079
Total current liabilities 372,365 385,324
Deferred credits and other liabilities    
Deferred income taxes 733,659 654,806
Regulatory liabilities 406,931 369,339
Unamortized tax credits 88,961 84,214
Defined benefit pension and other postretirement benefit plans liability 599,726 552,974
Other 76,921 78,146
Total deferred credits and other liabilities 1,906,198 1,739,479
Contributions in aid of construction 543,525 506,087
Total capitalization and liabilities $ 5,975,428 $ 5,672,210