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Derivative Instruments (Tables)
12 Months Ended
Dec. 31, 2020
GSWC  
Derivative instruments  
Schedule of changes in the fair value of the derivative
The following table presents changes in the fair value of BVESI’s derivatives for the years 2020 and 2019:
(dollars in thousands)20202019
Balance, at beginning of the period$(3,171)$(311)
Unrealized (loss) gain on purchased power contracts1,634 (2,860)
Balance, at end of the period$(1,537)$(3,171)