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Accumulated other comprehensive loss
6 Months Ended
Jun. 30, 2022
Equity [Abstract]  
Accumulated other comprehensive loss Accumulated other comprehensive loss
The after-tax changes in the components of accumulated other comprehensive loss were as follows:
Net Unrealized
Gain (Loss) on
Derivative
 Instruments
 Qualifying as
Hedges
Postretirement
 Liability
Adjustment
Net Unrealized
Gain (Loss) on
Available-for-sale
Investments
Total
Accumulated
 Other
Comprehensive
 Loss
 (In thousands)
At December 31, 2021$(538)$(40,461)$(5)$(41,004)
Other comprehensive loss before reclassifications— — (320)(320)
Amounts reclassified from accumulated other comprehensive loss112 445 32 589 
Net current-period other comprehensive income (loss)112 445 (288)269 
At March 31, 2022$(426)$(40,016)$(293)$(40,735)
Other comprehensive loss before reclassifications— — (128)(128)
Amounts reclassified to accumulated other comprehensive loss from a regulatory asset— (3,265)— (3,265)
Amounts reclassified from accumulated other comprehensive loss111 461 25 597 
Net current-period other comprehensive income (loss) 111 (2,804)(103)(2,796)
At June 30, 2022$(315)$(42,820)$(396)$(43,531)
Net Unrealized
Gain (Loss) on
Derivative
 Instruments
 Qualifying as
Hedges
Postretirement
 Liability
Adjustment
Net Unrealized
Gain (Loss) on
Available-for-sale
Investments
Total
Accumulated
 Other
Comprehensive
 Loss
 (In thousands)
At December 31, 2020$(984)$(47,207)$113 $(48,078)
Other comprehensive loss before reclassifications— — (44)(44)
Amounts reclassified from accumulated other comprehensive loss111 466 35 612 
Net current-period other comprehensive income (loss)111 466 (9)568 
At March 31, 2021$(873)$(46,741)$104 $(47,510)
Other comprehensive loss before reclassifications— — (52)(52)
Amounts reclassified from accumulated other comprehensive loss112 457 25 594 
Net current-period other comprehensive income (loss)112 457 (27)542 
At June 30, 2021$(761)$(46,284)$77 $(46,968)
The following amounts were reclassified out of accumulated other comprehensive loss into net income. The amounts presented in parenthesis indicate a decrease to net income on the Consolidated Statements of Income. The reclassifications were as follows:
Three Months EndedSix Months EndedLocation on Consolidated
Statements of
Income
June 30,June 30,
2022202120222021
(In thousands)
Reclassification adjustment for loss on derivative instruments included in net income
$(147)$(148)$(295)$(296)Interest expense
36 36 72 73 Income taxes
(111)(112)(223)(223)
Amortization of postretirement liability losses included in net periodic benefit credit(609)(617)(1,218)(1,234)Other income
148 160 312 311 Income taxes
(461)(457)(906)(923)
Reclassification adjustment on available-for-sale investments included in net income
(32)(31)(72)(75)Other income
15 15 Income taxes
(25)(25)(57)(60)
Total reclassifications$(597)$(594)$(1,186)$(1,206)