- Schedule of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive loss, net of tax	$ 1,626,244
Cumulative translation adjustment	54,609	$ (54,526)	$ (124,157)
Losses on derivatives qualifying as hedges	(17,936)	(1,797)	(2,970)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(5,940)	10,332	(54,117)
Accumulated other comprehensive loss, net of tax	1,684,202	1,626,244
Cumulative translation adjustments	(297,416)	(352,025)
Accumulated (losses) gains on derivatives qualifying as hedges	(10,332)	7,604
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	329,734	335,674
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive loss, net of tax	(352,025)	(297,499)	(173,342)
OCI before reclassifications	66,826	(54,526)	(124,157)
Amounts reclassified from AOCI	(12,217)	0	0
Cumulative translation adjustment	54,609
Net current period other comprehensive income (loss)		(54,526)	(124,157)
Accumulated other comprehensive loss, net of tax		(352,025)	(297,499)
Cumulative translation adjustments	(297,416)
(Losses) Gains on Derivatives Qualifying as Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive loss, net of tax	7,604	9,401	12,371
OCI before reclassifications	(14,782)	2,334	13,006
Amounts reclassified from AOCI	(3,154)	(4,131)	(15,976)
Losses on derivatives qualifying as hedges	(17,936)
Net current period other comprehensive income (loss)		(1,797)	(2,970)
Accumulated other comprehensive loss, net of tax		7,604	9,401
Accumulated (losses) gains on derivatives qualifying as hedges	(10,332)
Pension and Postretirement Liability Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive loss, net of tax	(335,674)	(325,342)	(379,459)
OCI before reclassifications	(7,941)	(21,111)	33,410
Amounts reclassified from AOCI	13,881	10,779	20,707
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(5,940)
Net current period other comprehensive income (loss)		(10,332)	54,117
Accumulated other comprehensive loss, net of tax		(335,674)	(325,342)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	329,734
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive loss, net of tax	(680,095)	(613,440)	(540,430)
OCI before reclassifications	44,103	(73,303)	(77,741)
Amounts reclassified from AOCI	(1,490)	6,648	4,731
Cumulative translation adjustment	54,609	(54,526)	(124,157)
Losses on derivatives qualifying as hedges	(17,936)	(1,797)	(2,970)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(5,940)	10,332	(54,117)
Net current period other comprehensive income (loss)	42,613	(66,655)	(73,010)
Accumulated other comprehensive loss, net of tax	$ (637,482)	$ (680,095)	$ (613,440)