Other Comprehensive Income (Loss) - Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Equity [Abstract]
Net income	$ 197,727	$ 216,357	$ 355,211	$ 360,746
Other comprehensive income:
Foreign currency translation	38,537	(114,049)	38,639	(122,269)
Pension and other post-retirement benefit adjustments:
Recognition of prior service credit, net of tax	(493)	(1,319)	(980)	(2,642)
Recognition of actuarial loss, net of tax	4,303	13,079	8,581	26,180
Net current period other comprehensive income (loss)	42,347	(102,289)	46,240	(98,731)
Comprehensive income	$ 240,074	$ 114,068	$ 401,451	$ 262,015