Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Property, plant and equipment, accumulated depreciation	$ 2,722,430	$ 2,659,230
Preferred stock, authorized shares (in shares)	10,000,000	10,000,000
Preferred stock, issued shares (in shares)	0	0
Common stock, authorized shares (in shares)	200,000,000	200,000,000
Common stock, issued shares (in shares)	108,972,492	108,879,245
Common stock, outstanding shares (in shares)	108,972,492	108,879,245
Hawaiian Electric Company, Inc. and Subsidiaries
Nonutility property, plant and equipment, accumulated depreciation	$ 109	$ 1,255
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)	16,751,488	16,751,488