Consolidated Balance Sheets (Parenthetical) - HECO (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Common stock, authorized shares	200,000,000	200,000,000
Common stock, outstanding shares	101,560,176	101,259,800
Hawaiian Electric Company, Inc. and Subsidiaries
Nonutility property, plant and equipment, accumulated depreciation	$ 1,226	$ 1,223
Common stock, par value (in dollars per share)	$ 6.67	$ 6.67
Common stock, authorized shares	50,000,000	50,000,000
Common stock, outstanding shares	15,429,105	15,429,105