Change in Balances of Accumulated Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (154,303)	$ (86,133)	$ (72,434)
Other comprehensive income (loss) before reclassifications	(25,899)	(67,591)	(13,631)
Amounts reclassified from accumulated other comprehensive income (loss)	(3,042)	(579)	(68)
Out-of-period adjustment	(3,000)
Net current-period other comprehensive income (loss)	(31,941)	(68,170)	(13,699)
Ending balance	(186,244)	(154,303)	(86,133)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(157,416)	(85,979)	(72,511)
Other comprehensive income (loss) before reclassifications	(28,994)	(71,437)	(13,468)
Out-of-period adjustment	(3,000)
Net current-period other comprehensive income (loss)	(31,994)	(71,437)	(13,468)
Ending balance	(189,410)	(157,416)	(85,979)
Unrealized Gains (Losses) on Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	3,808	846	164
Other comprehensive income (loss) before reclassifications	3,853	3,660	776
Amounts reclassified from accumulated other comprehensive income (loss)	(3,061)	(698)	(94)
Net current-period other comprehensive income (loss)	792	2,962	682
Ending balance	4,600	3,808	846
Defined Benefit Pension Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(695)	(1,000)	(87)
Other comprehensive income (loss) before reclassifications	(758)	186	(939)
Amounts reclassified from accumulated other comprehensive income (loss)	19	119	26
Net current-period other comprehensive income (loss)	(739)	305	(913)
Ending balance	$ (1,434)	$ (695)	$ (1,000)