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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2020
Income Taxes [Line Items]
Income tax expense increase (decrease)	$ (2,700)
Income tax benefit	(4,850)	$ (2,163)
Pre-tax loss increase (decrease)	(15,400)
Ratepayer net refund	107,000
Unrecognized tax benefits	11,700	10,100
Tax benefits that, if recognized, would affect the effective tax rate	$ 3,300	$ 3,000
Forecast
Income Taxes [Line Items]
Effective tax rate estimate			19.30%

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[Line Items] for Income Taxes [Table]

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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