Income Taxes - Schedule of Additional Information Relating to Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Unrecognized tax benefits at the end of the year that, if recognized, would favorably affect the effective tax rate (includes interest and penalties of $12,200, $14,799 and $8,454, respectively)	$ 36,272	$ 44,452	$ 44,545
Offset to deferred tax assets for unrecognized tax benefits that, if recognized, would not affect the effective tax rate	38,833	26,294	26,109
Interest and penalties recognized in current income tax expense (after giving effect to the reversal of interest and penalties of $7,326, $3,130 and $1,785, respectively)	$ (2,599)	$ 6,345	$ 1,355