XML 33 R21.htm IDEA: XBRL DOCUMENT v3.22.2.2
Derivative Instruments (Tables)
9 Months Ended
Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivative Instruments
The following table presents changes in the fair value of the Level 3 derivatives for the three and nine months ended September 30, 2022 and 2021. The change in fair value was due to the change in market energy prices during the three and nine months ended September 30, 2022.
 For The Three Months Ended 
 September 30,
 For The Nine Months Ended 
 September 30,
(dollars in thousands)2022202120222021
Fair value at beginning of the period$8,114 $2,810 $4,441 $(1,537)
Unrealized (losses) gains on purchased power contracts(545)5,065 3,128 9,412 
Fair value at end of the period$7,569 $7,875 $7,569 $7,875