Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table presents the changes in the balance of accumulated other comprehensive loss for the years ended December 31, 2020 and 2019. All amounts in the following tables are presented net of tax. 

	Defined Benefit Pension and Postretirement Plan Items		Commodity Contract Cash Flow Hedges		Interest Rate Swap Cash Flow Hedges		Total
(in thousands)
As of December 31, 2018	$	(5,928)	$	(785)	$	—	$	(6,713)
Other comprehensive income (loss) before reclassifications	(872)		2,161		—		1,289
Amounts reclassified from accumulated other comprehensive income (loss)	1,867		(2,595)		—		(728)
Net current-period other comprehensive income (loss)	995		(434)		—		561
Prior-year reclassification	—		(115)		—		(115)
As of December 31, 2019	(4,933)		(1,334)		—		(6,267)
Other comprehensive income (loss) before reclassifications	(578)		5,400		16		4,838
Amounts reclassified from accumulated other comprehensive income (loss)	365		(1,757)		(44)		(1,436)
Net current-period other comprehensive income (loss)	(213)		3,643		(28)		3,402
As of December 31, 2020	$	(5,146)	$	2,309	$	(28)	$	(2,865)

Reclassification out of Accumulated Other Comprehensive Income

The following table presents amounts reclassified out of accumulated other comprehensive income (loss) for the years ended December 31, 2020, 2019 and 2018. Deferred gains and losses of our commodity contracts cash flow hedges are recognized in earnings upon settlement.

	For the Year Ended December 31,
(in thousands)	2020		2019		2018
Amortization of defined benefit pension and postretirement plan items:
Prior service cost (1)	$	77	$	77	$	77
Net gain (1)	(592)		(2,600)		(579)
Total before income taxes	(515)		(2,523)		(502)
Income tax benefit (4)	150		656		63
Net of tax	$	(365)	$	(1,867)	$	(439)
Gains and losses on commodity contracts cash flow hedges
Propane swap agreements (2)	$	2,428	$	1,520	$	(647)
Natural gas swaps (2)(3)	—		7		197
Natural gas futures (2)(3)	—		2,096		(2,010)
Total before income taxes	2,428		3,623		(2,460)
Income tax (expense) benefit (4)	(671)		(1,028)		701
Net of tax	$	1,757	$	2,595	$	(1,759)
Gains on interest rate swap cash flow hedges:
Interest rate swap agreements	$	60	$	—	$	—
Total before income taxes	60		—		—
Income tax expense	(16)		—		—
Net of tax	$	44	$	—	$	—
Total reclassifications for the period	$	1,436	$	728	$	(2,198)

(1) These amounts are included in the computation of net periodic benefits. See Note 17, Employee Benefit Plans, for additional details.

(2) These amounts are included in the effects of gains and losses from derivative instruments. See Note 8, Derivative Instruments, for additional details.

(3) PESCO's results are reflected as discontinued operations in our consolidated statements of income.

(4) The income tax benefit is included in income tax expense in the accompanying consolidated statements of income.