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ACCUMULATED OTHER COMPREHENSIVE LOSS - Amounts Included in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss)
Beginning balance	$ 1,023,322	$ 881,265
Other comprehensive income (loss) before reclassifications	(10,388)	(1,952)	$ (88,242)
Amounts reclassified from accumulated other comprehensive loss	9,177	11,018	8,407
Other comprehensive income (loss)	(1,211)	9,066	(79,835)
Ending balance	1,252,873	1,023,322	881,265
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(259,742)	(268,808)	(188,973)
Other comprehensive income (loss)			(79,835)
Ending balance	(260,953)	(259,742)	(268,808)
Unrecognized Net Defined Benefit Plan Costs
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(139,102)	(154,466)	(104,822)
Other comprehensive income (loss) before reclassifications	(36,660)	4,895	(53,797)
Amounts reclassified from accumulated other comprehensive loss	7,158	10,469	4,153
Other comprehensive income (loss)	(29,502)	15,364	(49,644)
Ending balance	(168,604)	(139,102)	(154,466)
Change in Fair Value of Derivatives
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(3,182)	(1,008)	(89)
Other comprehensive income (loss) before reclassifications	(3,493)	(2,723)	(766)
Amounts reclassified from accumulated other comprehensive loss	2,019	549	(153)
Other comprehensive income (loss)	(1,474)	(2,174)	(919)
Ending balance	(4,656)	(3,182)	(1,008)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(117,458)	(113,334)	(84,062)
Other comprehensive income (loss) before reclassifications	29,765	(4,124)	(33,679)
Amounts reclassified from accumulated other comprehensive loss	0	0	4,407
Other comprehensive income (loss)	29,765	(4,124)	(29,272)
Ending balance	$ (87,693)	$ (117,458)	$ (113,334)

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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