Foreign Currency Hedging (Schedule of Effect of Derivative Instruments in Consolidated Statements of Income and Consolidated Statements of Comprehensive Income) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Foreign Currency Hedging [Abstract]
Net gain (loss) recognized in OCI, net of tax	$ 3,568	[1]	$ (5,482)	[1]
Gain (loss) reclassified from accumulated OCI into royalty revenue, net of tax	(1,247)	[2]	1,195	[2]
Amount excluded from effectiveness testing	0		0
Cash Flow Hedges [Member]
Derivative [Line Items]
Net gain (loss) recognized in interest and other income, net	$ 3	[3]	$ (84)	[3]

[1] Net change in the fair value of the effective portion of cash flow hedges classified in OCI

[2] Effective portion classified as royalty revenue

[3] Ineffectiveness from excess hedge was approximately ($3,000) and $57,000 for the three months ended March 31, 2013 and 2012, respectively. Net loss from restructuring hedges was approximately zero and $27,000 for the three months ended March 31, 2013 and 2012, respectively