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Rate Matters (Details) - DSIC [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Rate Matters [Abstract]
Distribution system improvement charge revenue	$ 0	$ 0
PPUC [Member] | Maximum [Member]
Rate Matters [Abstract]
Distribution system improvement charge percentage over base rate	5.00%
PPUC [Member] | Minimum [Member]
Rate Matters [Abstract]
Distribution system improvement charge percentage over base rate	0.00%

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- Definition

Percentage of the distribution system improvement charge (DSIC) over the base rate. The DSIC allows the Company to add a charge to customers' bills for qualified replacement costs of certain infrastructure without submitting a rate filing as permitted by the regulatory agency.

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- Definition

Amount of the distribution system improvement charge (DSIC) revenue. The DSIC allows the Company to add a charge to customers' bills for qualified replacement costs of certain infrastructure without submitting a rate filing as permitted by the regulatory agency.

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