Leases - Narrative (Details) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Aug. 31, 2019 USD ($) ft²	Jun. 30, 2021 MW	Mar. 31, 2021 MW	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) ft²	Dec. 31, 2019 USD ($)	Aug. 31, 2021 USD ($)
Lessee, Lease, Description [Line Items]
Renewal option (up to)				10 years
Right-of-use assets obtained in exchange for operating lease obligations (investing)				$ 44,000	$ 26,000	$ 7,000
Operating lease right-of-use-assets				122,416	153,069
Operating lease liabilities				$ 136,760	$ 160,432
Lease payments basis reduction for impact of collateral				0.25%
Area of real estate property (in square feet) | ft²					64,000
Lessor, operating sublease, renewal lease term					2 years
Lessor, operating sublease, estimated base rent revenue					$ 8,300
Operating lease renewal term (up to)							5 years
Operating lease term							5 years
Lease not yet commenced, annual rent expense							$ 6,200
Lease not yet commenced liability							$ 32,000
Puna Geothermal Venture Power Purchase Agreement
Lessee, Lease, Description [Line Items]
Firm capacity volume | MW		23.9	13.0
Operating lease right-of-use-assets				$ 21,000
Operating lease liabilities				$ 21,000
FHLB Des Moines | Maximum
Lessee, Lease, Description [Line Items]
Long-term debt term				30 years
Honolulu
Lessee, Lease, Description [Line Items]
Renewal option (up to)	10 years
Operating lease liabilities	$ 21,000
Area of real estate property (in square feet) | ft²	195,000
Term of contract	12 years
Expected reimbursements for improvements				$ 5,700	$ 2,600
Lessor, operating sublease, lease term				6 years 6 months
Honolulu | Office Space Lease, Phase 1, Commencement January 2020
Lessee, Lease, Description [Line Items]
Rent expense	$ 1,900
Expected reimbursements for improvements	5,000
Honolulu | Office Space Lease, Phase 2, Commencement January 2021
Lessee, Lease, Description [Line Items]
Operating lease liabilities	19,000
Rent expense	1,700
Expected reimbursements for improvements	$ 4,600