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Summary of Significant Accounting Policies - Minimum Future Licensing Revenues (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Accounting Policies [Abstract]
Remainder of 2013	$ 65,836
2014	64,776
2015	42,392
2016	33,085
2017	24,975
Thereafter	128,314
Fixed non-cancelable minimum licensing revenues	$ 359,378

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- Definition

Minimum future licensing revenues, total.

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- Definition

Minimum future licensing revenues, in first full year.

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- Definition

Minimum future licensing revenues, in fourth full year.

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- Definition

Minimum future licensing revenues, in second full year.

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- Definition

Minimum future licensing revenues, in third full year.

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Minimum future licensing revenues, remainder of current year.

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- Definition

Minimum future licensing revenues, thereafter.

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