Accumulated Other Comprehensive (Loss) Income Components and Activity in Accumulated Other Comprehensive (Loss) Income Net of Deferred Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014	Dec. 31, 2013
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ (62,413)		$ 116,245
Other comprehensive (loss) income, before reclassifications	(300,525)		(9,269)
Amounts reclassified from accumulated other comprehensive (loss) income	556		(266)
Total other comprehensive loss, net of tax	(299,969)		(9,535)
Other comprehensive loss attributable to noncontrolling interests	100		217
Ending balance	(362,282)		106,927
Accumulated Foreign Currency Adjustment Attributable to Parent
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance					(52,264)	116,465
Ending balance	(406,735)		111,424		(52,264)	116,465
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive (loss) income, before reclassifications	(354,571)		(5,258)
Amounts reclassified from accumulated other comprehensive (loss) income	0		0
Total other comprehensive loss, net of tax	(354,571)		(5,258)
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive loss attributable to noncontrolling interests	100		217
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance					0	487
Ending balance	2		186		0	487
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive (loss) income, before reclassifications	0		0
Amounts reclassified from accumulated other comprehensive (loss) income	2	[1]	(301)	[1]
Total other comprehensive loss, net of tax	2		(301)
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive loss attributable to noncontrolling interests	0		0
Accumulated Net Investment Gain (Loss) Attributable to Parent
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	11,384		0
Other comprehensive (loss) income, before reclassifications	54,046		0
Amounts reclassified from accumulated other comprehensive (loss) income	0		0
Total other comprehensive loss, net of tax	54,046		0
Other comprehensive loss attributable to noncontrolling interests	0		0
Ending balance	65,430		0
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance					(20,962)	0
Ending balance	(20,435)		(4,011)		(20,962)	0
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive (loss) income, before reclassifications	0		(4,011)
Amounts reclassified from accumulated other comprehensive (loss) income	527	[2]	0	[2]
Total other comprehensive loss, net of tax	527		(4,011)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive loss attributable to noncontrolling interests	0		0
Other Accumulated Comprehensive Income (Loss)
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(571)		(707)
Other comprehensive (loss) income, before reclassifications	0		0
Amounts reclassified from accumulated other comprehensive (loss) income	27		35
Total other comprehensive loss, net of tax	27		35
Other comprehensive loss attributable to noncontrolling interests	0		0
Ending balance	$ (544)		$ (672)

[1] The pre-tax portion of amounts reclassified from accumulated other comprehensive (loss) income consists of amortization of prior service benefit, which is a component of pension and postretirement benefits cost (credit). See Note 12, “Pension Plans and Other Postretirement Benefits.”

[2] The pre-tax portion of amounts reclassified from accumulated other comprehensive (loss) income is included in interest expense.