Impact of COVID-19 (Details) - visitor visitor in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Impact of COVID-19 [Line Items]
Reduction of number of visitor arrivals to Hawaii for period three years prior current period	21.00%
Hawaii Gas Business
Impact of COVID-19 [Line Items]
Number of visitor arrivals to Hawaii during period	2,000	847
Increase in gas consumption for quarter period one year prior current period	11.00%
Gas reduction for quarter period three years prior current period	13.00%