Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of Unrecognized Tax Benefits [Line Items]
Balance of unrecognized tax benefits at beginning of year	$ 4,012	$ 8,414	$ 10,916
Increases for tax positions of prior years	10,729		398
Decreases for tax positions of prior years	(4)	(310)
Increases for tax positions established for the current period	49	750	421
Decreases for settlements with taxing authorities	(27)	(36)	(3,000)
Reductions resulting from lapse of applicable statute of limitation	(1,697)	(4,678)	(308)
Adjustment resulting from foreign currency translation	17	(128)	(13)
Balance of unrecognized tax benefits at end of year	$ 13,079	$ 4,012	$ 8,414