Income Taxes - Schedule of Accrued Interest and Penalties (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Uncertain tax positions net, excluding interest and penalties	$ (76,303)	$ (48,353)
Accrued interest on uncertain tax positions	(12,786)	(7,029)
Accrued penalties on uncertain tax positions	(59,797)	(21,662)
Uncertain tax positions net, including interest and penalties	$ (148,886)	$ (77,044)