Accumulated Other Comprehensive Loss (Tables)

6 Months Ended

Jun. 30, 2021

Equity [Abstract]

Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax

Amounts included in accumulated other comprehensive loss, net of tax, were as follows: 

	Unrecognized Net Defined Benefit Plan Costs		Change in Fair Value of Derivatives		Foreign Currency Translation		Total
	(Dollars in thousands)
Balance at December 31, 2020	$	(168,604)	$	(4,656)	$	(87,693)	$	(260,953)
Other comprehensive loss before reclassifications	—		484		(7,703)		(7,219)
Amounts reclassified from accumulated other     comprehensive loss	3,754		985		—		4,739
Other comprehensive loss	3,754		1,469		(7,703)		(2,480)
Balance at June 30, 2021	$	(164,850)	$	(3,187)	$	(95,396)	$	(263,433)