Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Changes in Accumulated Other Comprehensive Income by Component, Net of Tax

Changes in accumulated other comprehensive income by component, net of tax, were as follows:

(In thousands)	Postretirement Benefits
Balance at December 31, 2017	$	2,077
Other comprehensive income before reclassifications	2,461
Amounts reclassified from accumulated other comprehensive loss	(101)
Net current-period other comprehensive income	2,360
Balance at December 31, 2018	$	4,437
Other comprehensive income before reclassifications	(2,530)
Amounts reclassified from accumulated other comprehensive loss	(547)
Net current-period other comprehensive income	(3,077)
Balance at December 31, 2019	$	1,360
Other comprehensive income before reclassifications	1,634
Amounts reclassified from accumulated other comprehensive loss	(575)
Net current-period other comprehensive income	1,059
Balance at December 31, 2020	$	2,419

Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income into Consolidated Statement of Operations

Amounts reclassified from accumulated other comprehensive income into the Consolidated Statement of Operations were as follows:

	Year Ended December 31,						Affected Line Item in the Consolidated Statement of Operations
(In thousands)	2020		2019		2018
Postretirement benefits
Amortization of prior service cost	$	709	$	709	$	709	General and administrative expense
Amortization of net (gain) loss	36		—		—		General and administrative expense
Total before tax	745		709		709		Income before income taxes
Income tax expense	(170)		(162)		(162)		Income tax expense
Cumulative effect of adoption of ASU 2018-02 reclassified to retained earnings	—		—		(446)		Retained earnings
Total reclassifications for the period	$	575	$	547	$	101	Net income