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Acquisition (Allocation of Consideration) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Aug. 05, 2016 | Aug. 04, 2016 | Jan. 25, 2016 | Dec. 31, 2015
--- | --- | --- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | $ 209,661 | $ 204,794 |  |  |  | $ 116,899
Smart Card Software Limited |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash |  |  |  |  | $ 12,056 |
Accounts receivable |  |  |  |  | 6,563 |
Property and equipment |  |  |  |  | 524 |
Other tangible assets |  |  |  |  | 1,462 |
Identified intangible assets |  |  |  |  | 59,700 |
Goodwill |  |  |  |  | 46,903 |
Accounts payable and accrued liabilities |  |  |  |  | (5,996) |
Deferred income taxes |  |  |  |  | (15,556) |
Deferred revenue |  |  |  |  | (1,313) |
Total |  |  |  |  | $ 104,343 |
Inphi Memory Interconnect Business [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Inventory |  |  |  | $ 6,300 |  |
Property and equipment |  |  |  | 4,543 |  |
Other tangible assets |  |  |  | 206 |  |
Identified intangible assets |  |  |  | 50,222 |  |
Goodwill |  |  |  | 32,723 |  |
Accounts payable and accrued liabilities |  |  |  | (3,527) |  |
Deferred revenue |  |  |  | (467) |  |
Total |  |  |  | $ 90,000 |  |
Snowbush [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Property and equipment |  |  | $ 911 |  |  |
Identified intangible assets |  |  | 25,189 |  |  |
Goodwill |  |  | 14,015 |  |  |
Deferred revenue |  |  | (1,270) |  |  |
Total |  |  | $ 38,845 |  |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary difference assumed at the acquisition date that are classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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