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Acquisitions Acquisition (Purchase Price Allocation) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Aug. 18, 2021 | Jul. 02, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 08, 2019 | Aug. 23, 2019
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Business acquisition |  |  |  |  |  |  |
Goodwill | $ 278,810 |  |  | $ 183,222 | $ 183,465 |  |
AnalogX, Inc. |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Cash and cash equivalents |  |  | $ 2,763 |  |  |  |
Accounts receivable |  |  | 280 |  |  |  |
Unbilled receivables |  |  | 1,566 |  |  |  |
Prepaid expenses and other current assets |  |  | 1,354 |  |  |  |
Identified intangible assets |  |  | 6,800 |  |  |  |
IPR&D |  |  | 3,800 |  |  |  |
Goodwill |  |  | 38,326 |  |  |  |
Property, plant and equipment, net |  |  | 118 |  |  |  |
Accounts payable |  |  | (1,112) |  |  |  |
Deferred revenue |  |  | (23) |  |  |  |
Income taxes payable |  |  | (6,144) |  |  |  |
Other current liabilities |  |  | (215) |  |  |  |
Recognized identifiable assets acquired and liabilities assumed, net |  |  | $ 47,513 |  |  |  |
PLDA Group |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Cash and cash equivalents |  | $ 5,820 |  |  |  |  |
Accounts receivable |  | 2,233 |  |  |  |  |
Inventories |  | 125 |  |  |  |  |
Prepaid expenses and other current assets |  | 836 |  |  |  |  |
Operating lease right-of-use assets |  | 864 |  |  |  |  |
Identified intangible assets |  | 21,400 |  |  |  |  |
IPR&D |  | 7,400 |  |  |  |  |
Goodwill |  | 57,543 |  |  |  |  |
Property, plant and equipment, net |  | 679 |  |  |  |  |
Other asset |  | 339 |  |  |  |  |
Accounts payable |  | (1,046) |  |  |  |  |
Accrued salaries and benefits |  | (814) |  |  |  |  |
Deferred revenue |  | (514) |  |  |  |  |
Income taxes payable |  | (118) |  |  |  |  |
Operating lease liability |  | (852) |  |  |  |  |
Deferred tax liability, net |  | (8,180) |  |  |  |  |
Other current liabilities |  | (74) |  |  |  |  |
Recognized identifiable assets acquired and liabilities assumed, net |  | $ 85,641 |  |  |  |  |
Northwest Logic |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  |  | $ 159
Accounts receivable |  |  |  |  |  |  | 1,679
Prepaid expenses and other current assets |  |  |  |  |  |  | 65
Operating lease right-of-use assets |  |  |  |  |  |  | 178
Identified intangible assets |  |  |  |  |  |  | 8,800
Goodwill |  |  |  |  |  |  | 13,477
Other asset |  |  |  |  |  |  | 9
Accounts payable |  |  |  |  |  |  | (9)
Operating lease liability |  |  |  |  |  |  | (178)
Deferred tax liability, net |  |  |  |  |  |  | (2,133)
Other current liabilities |  |  |  |  |  |  | (108)
Recognized identifiable assets acquired and liabilities assumed, net |  |  |  |  |  |  | $ 21,939
Silicon IP and Business Protocols Business from Verimatrix |  |  |  |  |  |  |
Business acquisition |  |  |  |  |  |  |
Prepaid expenses and other current assets |  |  |  |  |  | $ 267 |
Unbilled receivables |  |  |  |  |  | 6,765 |
Operating lease right-of-use assets |  |  |  |  |  | 852 |
Identified intangible assets |  |  |  |  |  | 23,500 |
Goodwill |  |  |  |  |  | 16,845 |
Deferred revenue |  |  |  |  |  | (310) |
Operating lease liability |  |  |  |  |  | (852) |
Other current liabilities |  |  |  |  |  | (267) |
Recognized identifiable assets acquired and liabilities assumed, net |  |  |  |  |  | $ 46,800 |

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