Regulatory Matters - Summary of Utilities Rate Plans (RECO) (Details) - RECO - USD ($) $ in Thousands			1 Months Ended	12 Months Ended	23 Months Ended	35 Months Ended
	Mar. 30, 2022	Jan. 01, 2022	Jan. 31, 2022	Dec. 31, 2016	Dec. 31, 2021	Jan. 31, 2020	Jan. 31, 2016
Public Utilities, General Disclosures [Line Items]
Utilities operating expense, depreciation and amortization						$ 200
Regulatory liabilities, amortization period						3 years
Amortization to income of net regulatory assets					$ 4,800	$ 25,600
Regulatory assets, amortization period					4 years	4 years
Average rate base					$ 229,900	$ 178,700
Weighted average cost of capital (after-tax) (percent)					7.11%	7.47%
Authorized return on common equity (percent)					9.50%	9.60%
Cost of long-term debt (percent)					4.88%	5.37%
Common equity ratio, percentage					48.32%	49.70%
Electric
Public Utilities, General Disclosures [Line Items]
Plan electric system storm hardening amount							$ 15,700
Plan period (years)				3 years
Year 1
Public Utilities, General Disclosures [Line Items]
Base rate changes					$ 12,000	$ 1,700
Actual return on common equity (percent)					5.40%	7.50%
Year 2
Public Utilities, General Disclosures [Line Items]
Actual return on common equity (percent)					2.30%	5.70%
Scenario, Forecast
Public Utilities, General Disclosures [Line Items]
Regulatory liabilities, amortization period		3 years
Amortization to income of net regulatory assets		$ 9,200
Regulatory assets, amortization period		3 years
Average rate base		$ 262,800
Weighted average cost of capital (after-tax) (percent)			7.08%
Authorized return on common equity (percent)			9.60%
Cost of long-term debt (percent)			4.74%
Common equity ratio, percentage			48.51%
Scenario, Forecast | Tropical Storm Henri
Public Utilities, General Disclosures [Line Items]
Amortization to income of net regulatory assets		$ 2,400
Regulatory assets, amortization period		3 years
Scenario, Forecast | Electric
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount	$ 20,400	$ 16,900
Return on common equity (percent)		11.04%
Common equity ratio		47.00%
Scenario, Forecast | Year 1
Public Utilities, General Disclosures [Line Items]
Base rate changes			$ 9,650
Scenario, Forecast | Period 1
Public Utilities, General Disclosures [Line Items]
Utilities operating expense, depreciation and amortization		$ 200
Regulatory liabilities, amortization period		3 years
Scenario, Forecast | Period 2
Public Utilities, General Disclosures [Line Items]
Utilities operating expense, depreciation and amortization		$ 10,000