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Reconciliation of Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of Unrecognized Tax Benefits [Line Items]
Balance at January 1,	$ 6,824	$ 7,403	$ 7,923
Additions based on tax positions related to the current year	50	200	750
Additions for tax positions of prior years	283	386	419
Reductions for tax positions of prior years	(1,260)	(1,165)	(1,628)
Settlements	(2,528)		(61)
Balance at December 31,	$ 3,369	$ 6,824	$ 7,403

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

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-Name Accounting Standards Codification

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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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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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