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Reconciliation of Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Unrecognized Tax Benefits [Line Items]
Unrecognized tax benefits at January 1	$ 285,560	$ 262,560	$ 252,570
Increases for positions taken in current year	12,997	14,800	13,480
Increases for positions taken in a prior year	14,289	21,030	2,280
Decreases for positions taken in a prior year	(186,555)	(700)	(980)
Decreases for settlements with taxing authorities	(5,135)	(800)	(1,390)
Decreases for lapses in the applicable statute of limitations	(9,786)	(11,330)	(3,400)
Unrecognized tax benefits at December 31	$ 111,370	$ 285,560	$ 262,560

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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