ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)

12 Months Ended

Dec. 31, 2021

Equity [Abstract]

Amounts Included in Accumulated Other Comprehensive Income (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 January 1, 2019	$	(154,466)	$	(1,008)	$	(113,334)	$	(268,808)
Other comprehensive loss before     reclassifications	4,895		(2,723)		(4,124)		(1,952)
Amounts reclassified from accumulated     other comprehensive loss	10,469		549		—		11,018
Other comprehensive income	15,364		(2,174)		(4,124)		9,066
Balance at December 31, 2019	(139,102)		(3,182)		(117,458)		(259,742)
Other comprehensive loss before     reclassifications	(36,660)		(3,493)		29,765		(10,388)
Amounts reclassified from accumulated     other comprehensive loss	7,158		2,019		—		9,177
Other comprehensive loss	(29,502)		(1,474)		29,765		(1,211)
Balance at December 31, 2020	(168,604)		(4,656)		(87,693)		(260,953)
Other comprehensive loss before     reclassifications	41,422		715		(50,334)		(8,197)
Amounts reclassified from accumulated     other comprehensive loss	7,708		1,614		—		9,322
Other comprehensive income	49,130		2,329		(50,334)		1,125
Balance at December 31, 2021	$	(119,474)	$	(2,327)	$	(138,027)	$	(259,828)