Goodwill And Identified Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Goodwill [Roll Forward]
Goodwill	$ 382,963
Purchase price adjustment related to the acquisition of DTS	3,450
Goodwill	386,413
Amortization expense	28,555	$ 6,022
Product Licensing Segment
Goodwill [Roll Forward]
Goodwill	378,700
Semiconductor and IP Licensing Segment
Goodwill [Roll Forward]
Goodwill	$ 7,700

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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