Accumulated Other Comprehensive Income (Loss) - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive loss (income), net of tax, beginning balance			$ (540,430)	$ (392,711)
OCI before reclassifications			(22,395)	(1,383)
Amounts reclassified from AOCI			6,577	10,380
Net current period other comprehensive income (loss)	$ 17,067	$ 13,568	(15,818)	8,997
Accumulated other comprehensive loss (income), net of tax, ending balance	(556,248)	(383,714)	(556,248)	(383,714)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive loss (income), net of tax, beginning balance			(173,342)	(104,278)
OCI before reclassifications			(32,958)	(1,826)
Amounts reclassified from AOCI			0	0
Net current period other comprehensive income (loss)			(32,958)	(1,826)
Accumulated other comprehensive loss (income), net of tax, ending balance	(206,300)	(106,104)	(206,300)	(106,104)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive loss (income), net of tax, beginning balance			12,371	(4,012)
OCI before reclassifications			10,563	443
Amounts reclassified from AOCI			(4,446)	1,615
Net current period other comprehensive income (loss)			6,117	2,058
Accumulated other comprehensive loss (income), net of tax, ending balance	18,488	(1,954)	18,488	(1,954)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive loss (income), net of tax, beginning balance			(379,459)	(284,421)
OCI before reclassifications			0	0
Amounts reclassified from AOCI			11,023	8,765
Net current period other comprehensive income (loss)			11,023	8,765
Accumulated other comprehensive loss (income), net of tax, ending balance	$ (368,436)	$ (275,656)	$ (368,436)	$ (275,656)