Summary of Impact of Translating Financial Statements of Certain of Company's International Subsidiaries (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Foreign Currency Translation [Line Items]
Other comprehensive Income (Loss)	$ (68,997)	$ (47,699)	$ (20,232)
Brazil
Foreign Currency Translation [Line Items]
Exchange Rate	2.69	2.36	2.05
Other comprehensive Income (Loss)	(30,723)	(34,451)	(21,690)
Argentina
Foreign Currency Translation [Line Items]
Exchange Rate	8.55	6.52	4.91
Other comprehensive Income (Loss)	(20,197)	(24,845)	(12,926)
Colombia
Foreign Currency Translation [Line Items]
Exchange Rate	2,392.46	1,926.83	1,768.23
Other comprehensive Income (Loss)	(7,632)	(2,969)	2,790
Peru
Foreign Currency Translation [Line Items]
Exchange Rate	3.05	2.84	2.56
Other comprehensive Income (Loss)	(2,785)	(3,685)	2,021
All Other
Foreign Currency Translation [Line Items]
Other comprehensive Income (Loss)	(2,066)	(185)	6,842
Mexico
Foreign Currency Translation [Line Items]
Impact of sale of Mexican subsidiaries on other comprehensive income loss		22,088
Sale of Mexico subsidiary
Foreign Currency Translation [Line Items]
Other comprehensive Income (Loss)	(68,983)	(47,617)	(20,005)
Chile
Foreign Currency Translation [Line Items]
Exchange Rate	606.20	525.50	479.80
Other comprehensive Income (Loss)	$ (5,580)	$ (3,570)	$ 2,958