Business Combinations and Other Transactions (Details)				3 Months Ended	12 Months Ended
	Jul. 19, 2019 USD ($)	Jul. 30, 2018 USD ($)	Dec. 20, 2016 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	May 31, 2019	Jul. 30, 2018 USD ($)	Jul. 30, 2018 patent_and_application	Jul. 30, 2018 coding_patent_and_application	Jul. 30, 2018 office
Business Acquisition [Line Items]
Acquisition of business, net of cash acquired					$ 0	$ 142,985,000	$ 0
Contingent consideration liability						19,800,000
Goodwill					22,421,000	22,421,000	16,033,000
Gain on asset acquisition					$ 14,200,000
Weighted-average discount rate					0.70%
Assumed salary increase rate					3.00%
Net operating expenses					$ 37,835,000	62,595,000	301,495,000
Cash and cash equivalents					9,500,000	13,700,000
Other commitment					25,000,000.0
Proceeds from sale of business	$ 10,000,000.0				10,000,000	0	$ 0
Gain on disposition of business	$ 8,500,000				8,500,000
Technicolor Patent and R&I Acquisition
Business Acquisition [Line Items]
2020					94,000
2021					177,000
2022					239,000
2023					568,000
2024					248,000
2025 - 2029					1,935,000
Technicolor Patent Acquisition
Business Acquisition [Line Items]
Number of patents (more than)										18,000	3,000
Number of staff from acquisition | office												300
Payments to acquire business		$ 158,898,000
Cash acquired									$ 15,913,000
Acquisition of business, net of cash acquired						143,000,000.0
Percentage of voting interests acquired		42.50%						42.50%
Contingent consideration liability						19,800,000			18,616,000
Transaction-related receivable									(20,200,000)
Acquisition consideration		$ 177,514,000
Fair value of consideration transferred									157,314,000
Other current assets									5,600,000
Other non-current assets									3,116,000
Current liabilities									(6,219,000)
Long-term debt									(17,717,000)
Other long-term liabilities									(3,767,000)
Total net tangible assets and liabilities									(3,074,000)
Patents									154,000,000
Goodwill									6,388,000
Total identified intangible assets									$ 160,388,000
Gain on contingent consideration				$ 20,500,000	$ 20,500,000
Effective interest rate as of acquisition date					14.50%
Interest debt expense					$ 2,700,000	700,000
Transaction and integration related costs					8,400,000	$ 17,800,000
R&I Acquisition
Business Acquisition [Line Items]
Payments to acquire business					0
Gain on contingent consideration					20,500,000
Accumulated projected benefit obligation					6,200,000
Service cost					100,000
Interest cost					$ 100,000
Hillcrest Products Business
Business Acquisition [Line Items]
Acquisition of business, net of cash acquired			$ 48,000,000.0
Cash acquired from acquisition			$ 400,000
Patents
Business Acquisition [Line Items]
Weighted average estimated useful life (years)					9 years 10 months 24 days	10 years
Minimum | Patents | Technicolor Patent Acquisition
Business Acquisition [Line Items]
Weighted average estimated useful life (years)					9 years
Maximum | Patents | Technicolor Patent Acquisition
Business Acquisition [Line Items]
Weighted average estimated useful life (years)					10 years
Shortfalls Funding | Technicolor Patent Acquisition
Business Acquisition [Line Items]
Interest					25.00%
Madison Arrangement | Technicolor Patent Acquisition
Business Acquisition [Line Items]
Net operating expenses					$ 12,000,000.0
Madison Arrangement | Patent licensing royalties | Technicolor Patent Acquisition
Business Acquisition [Line Items]
Madison Arrangement revenue					13,500,000
Patent administration and licensing | Madison Arrangement | Technicolor Patent Acquisition
Business Acquisition [Line Items]
Net operating expenses					$ 6,300,000