Foreign Currency Hedging (Schedule of Effect of Derivative Instruments in Consolidated Statements of Income and Consolidated Statements of Comprehensive Income) (Detail) (Cash Flow Hedges [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Cash Flow Hedges [Member]
Derivative [Line Items]
Net gain (loss) recognized in OCI, net of tax	$ (1,265)	[1]	$ 7,086	[1]	$ 2,303	[1]	$ 1,603	[1]
Gain (loss) reclassified from accumulated OCI into royalty revenue, net of tax	268	[2]	(1,864)	[2]	(979)	[2]	(670)	[2]
Net gain (loss) recognized in interest and other income, net	2	[3]	57	[3]	5	[3]	(27)	[3]
Amount excluded from effectiveness testing	$ 0		$ 0		$ 0		$ 0

[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) and ($57) for the three months ended June 30, 2013 and 2012, respectively, and ($5) and zero for the six months ended June 30, 2013 and 2012, respectively. Net loss from restructuring hedges was approximately zero for the three months ended June 30, 2013 and 2012, respectively, and zero and $27 for the six months ended June 30, 2013 and 2012, respectively.