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Stockholder's Equity - Accumulated Other Comprehensive Income (Loss) (Tables)
 6 Months Ended
Jun. 30, 2020
Equity [Abstract]  
Changes in Accumulated Other Comprehensive Loss
 
 
Defined Benefit
 
Commodity
 
Interest Rate
 
 
 
 
Pension and
 
Contracts
 
Swap
 
 
 
 
Postretirement
 
Cash Flow
 
Cash Flow
 
 
 
 
Plan Items
 
Hedges
 
Hedges
 
Total
(in thousands)
 
 
 
 
 
 
 
 
As of December 31, 2019
 
$
(4,933
)
 
$
(1,334
)
 
$
—

 
$
(6,267
)
Other comprehensive income (loss) before reclassifications
 
—

 
2,770

 
(29
)
 
2,741

Amounts reclassified from accumulated other comprehensive income (loss)
 
132

 
(1,060
)
 
(8
)
 
(936
)
Net current-period other comprehensive income
 
132

 
1,710

 
(37
)
 
1,805

As of June 30, 2020
 
$
(4,801
)
 
$
376

 
$
(37
)
 
$
(4,462
)

(in thousands)
 
 
 
 
 
 
 
 
As of December 31, 2018
 
$
(5,928
)
 
$
(785
)
 
$
—

 
$
(6,713
)
Other comprehensive income before reclassifications
 
—

 
1,000

 
—

 
1,000

Amounts reclassified from accumulated other comprehensive income/(loss)
 
213

 
(132
)
 
—

 
81

Net prior-period other comprehensive income
 
213

 
868

 
—

 
1,081

Prior-year reclassification
 
—

 
(115
)
 
—

 
(115
)
As of June 30, 2019
 
$
(5,715
)
 
$
(32
)
 
$
—

 
$
(5,747
)
Reclassifications out of Accumulated Other Comprehensive Income (Loss)
The following table presents amounts reclassified out of accumulated other comprehensive loss for the three and six months ended June 30, 2020 and 2019. Deferred gains or losses for our commodity contracts and interest rate swap cash flow hedges are recognized in earnings upon settlement.
 
 
Three Months Ended
 
Six Months Ended
 
 
June 30,
 
June 30,
 
 
2020
 
2019
 
2020
 
2019
(in thousands)
 
 
 
 
 
 
 
 
Amortization of defined benefit pension and postretirement plan items:
 
 
 
 
 
 
 
 
Prior service credit (1)
 
$
19

 
$
19

 
$
38

 
$
39

Net loss(1)
 
(108
)
 
(163
)
 
(215
)
 
(328
)
Total before income taxes
 
(89
)

(144
)
 
(177
)

(289
)
Income tax benefit
 
23

 
37

 
45

 
76

Net of tax
 
(66
)
 
(107
)
 
(132
)

(213
)
Gains and losses on commodity contracts cash flow hedges:
 
 
 
 
 
 
 
 
Propane swap agreements (2)
 
238

 
252

 
1,465

 
858

Natural gas swaps (2)(3)
 
—

 
—

 
—

 
11

Natural gas futures (2)(3)
 
—

 
(125
)
 
—

 
(698
)
Total before income taxes
 
238

 
127

 
1,465


171

Income tax expense
 
(66
)
 
(34
)
 
(405
)
 
(39
)
Net of tax
 
172

 
93


1,060

 
132

Gains on interest rate swap cash flow hedges:
 
 
 
 
 
 
 
 
Interest rate swap agreements
 
11

 
—

 
11

 
—

Total before income taxes
 
11

 
—

 
11

 
—

Income tax expense
 
(3
)
 
—

 
(3
)
 
—

Net of tax
 
8

 
—

 
8

 
—

Total reclassifications for the period
 
$
114

 
$
(14
)

$
936

 
$
(81
)

(1) These amounts are included in the computation of net periodic costs (benefits). See Note 10, Employee Benefit Plans, for additional details.
(2) These amounts are included in the effects of gains and losses from derivative instruments. See Note 13, Derivative Instruments, for additional details.
(3) PESCO's results are reflected as discontinued operations in our condensed consolidated statements of income.