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Acquisitions Acquisition (Additional Information) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Aug. 18, 2021 | Jul. 02, 2021 | Dec. 31, 2019 | Dec. 08, 2019 | Aug. 23, 2019
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Business acquisition |  |  |  |  |  |  |
Contractual obligation | [1],[2],[3] | $ 201,940 |  |  |  |  |
Acquisition retention bonuses |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Contractual obligation | [1],[2],[3],[4] | $ 9,528 |  |  |  |  |
Northwest Logic |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Acquisition-related costs |  |  |  |  | $ 700 |  |
Northwest Logic | Acquisition retention bonuses |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Contractual obligation |  |  |  |  |  |  | $ 9,000
Northwest Logic | Acquisition retention bonuses | Annual payment |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Contractual obligation |  |  |  |  |  |  | $ 3,000
Silicon IP and Business Protocols Business from Verimatrix |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Acquisition-related costs |  |  |  |  | $ 3,100 |  |
Goodwill expected to be tax deductible |  |  |  |  |  | $ 15,000 |
Silicon IP and Business Protocols Business from Verimatrix | Acquisition retention bonuses |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Contractual obligation |  |  |  |  |  | $ 1,000 |
AnalogX, Inc. |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Acquisition-related costs |  |  |  | $ 800 |  |  |
Goodwill expected to be tax deductible |  |  |  | 26,900 |  |  |
AnalogX, Inc. | Acquisition retention bonuses |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Contractual obligation |  |  |  | $ 3,500 |  |  |
PLDA Group |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Acquisition-related costs |  |  | $ 1,400 |  |  |  |
PLDA Group | Acquisition retention bonuses |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Contractual obligation |  |  | $ 3,000 |  |  |  |
[1] | For the Company’s lease commitments as of December 31, 2021, refer to Note 10, Leases.”
[2] | The Company’s other contractual obligations as of December 31, 2021 were not material.
[3] | The above table does not reflect possible payments in connection with unrecognized tax benefits of approximately $20.2 million including $18.9 million recorded as a reduction of long-term deferred tax assets and $1.3 million in long-term income taxes payable, as of December 31, 2021. As noted below in Note 19, Income Taxes,” although it is possible that some of the unrecognized tax benefits could be settled within the next 12 months, the Company cannot reasonably estimate the outcome at this time.
[4] | In connection with the acquisitions of Northwest Logic in the third quarter of 2019 and the Secure Silicon IP and Protocols business in the fourth quarter of 2019, and the acquisitions of AnalogX and PLDA in the third quarter of 2021, the Company is obligated to pay retention bonuses to certain employees subject to certain eligibility and acceleration provisions including the condition of employment.(6) On November 17, 2017, the Company entered into an Indenture with U.S. Bank National Association, as trustee, relating to the issuance by the Company of $172.5 million aggregate principal amount of the 2023 Notes. Refer to Note 12, Convertible Notes,” for additional details.

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