Schedule Of Income Before Income Tax (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Income Before Income Tax [Line Items]
Domestic	$ 65,738	$ 192,857	$ 161,573
Foreign	20,466	81,024	70,301
Income before income taxes	$ 86,204	$ 273,881	$ 231,874