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Fair Value of Financial Instruments: (Tables)
3 Months Ended
Mar. 31, 2022
GSWC  
Fair value of financial instruments  
Schedule of estimates of the fair value of long-term debt
The table below estimates the fair value of long-term debt held by GSWC. The fair values as of March 31, 2022 and December 31, 2021 were determined using rates for similar financial instruments of the same duration utilizing Level 2 (as described in Note 5) methods and assumptions. Changes in the assumptions will produce different results.
March 31, 2022December 31, 2021
(dollars in thousands)Carrying AmountFair ValueCarrying AmountFair Value
Financial liabilities:    
Long-term debt—GSWC (1)
$415,685 $450,975 $415,788 $490,852