Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Property, plant and equipment, accumulated depreciation	$ 3,040,153	$ 2,903,144
Shareholders’ equity
Preferred stock, no par value (in dollars per share)	$ 0	$ 0
Preferred stock, authorized shares (in shares)	10,000,000	10,000,000
Preferred stock, issued shares (in shares)	0	0
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, authorized shares (in shares)	200,000,000	200,000,000
Common stock, issued shares (in shares)	109,311,289	109,181,124
Common stock, outstanding shares (in shares)	109,311,289	109,181,124
Hawaiian Electric Company, Inc. and Subsidiaries
Utility property, plant and equipment
Nonutility property, plant and equipment, accumulated depreciation	$ 58	$ 115
Shareholders’ equity
Common stock, par value (in dollars per share)	$ 6.67	$ 6.67
Common stock, authorized shares (in shares)	50,000,000	50,000,000
Common stock, outstanding shares (in shares)	17,324,376	17,324,376