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CONSOLIDATED SUPPLEMENTARY FINANCIAL DATA (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract] |
Schedule of quarterly statements of operations | RAMBUS INC. CONSOLIDATED SUPPLEMENTARY FINANCIAL DATA Quarterly Statements of Operations (Unaudited)
| Dec. 31, 2015 |  | Sept. 30, 2015 |  | June 30, 2015 |  | March 31, 2015 |  | Dec. 31, 2014 |  | Sept. 30, 2014 |  | June 30, 2014 |  | March 31, 2014
| (In thousands, except for per share amounts)
Total revenue | $ | 76,773 |  |  | $ | 73,779 |  |  | $ | 72,812 |  |  | $ | 72,914 |  |  | $ | 72,040 |  |  | $ | 69,712 |  |  | $ | 76,518 |  |  | $ | 78,288 |
Total operating costs and expenses (1) | $ | 56,439 |  |  | $ | 56,139 |  |  | $ | 57,258 |  |  | $ | 55,022 |  |  | $ | 54,455 |  |  | $ | 55,244 |  |  | $ | 56,414 |  |  | $ | 55,099 |
Operating income | $ | 20,334 |  |  | $ | 17,640 |  |  | $ | 15,554 |  |  | $ | 17,892 |  |  | $ | 17,585 |  |  | $ | 14,468 |  |  | $ | 20,104 |  |  | $ | 23,189 |
Net income (2) | $ | 12,992 |  |  | $ | 182,033 |  |  | $ | 6,861 |  |  | $ | 9,502 |  |  | $ | 7,841 |  |  | $ | 5,513 |  |  | $ | 5,043 |  |  | $ | 7,804 |
Net income per share — basic | $ | 0.12 |  |  | $ | 1.56 |  |  | $ | 0.06 |  |  | $ | 0.08 |  |  | $ | 0.07 |  |  | $ | 0.05 |  |  | 0.04 |  |  | $ | 0.07 |
Net income per share — diluted | $ | 0.11 |  |  | $ | 1.52 |  |  | $ | 0.06 |  |  | $ | 0.08 |  |  | $ | 0.07 |  |  | $ | 0.05 |  |  | 0.04 |  |  | $ | 0.07 |
Shares used in per share calculations — basic (3) | 111,476 |  |  | 116,444 |  |  | 116,027 |  |  | 115,336 |  |  | 115,024 |  |  | 114,523 |  |  | 114,116 |  |  | 113,590 |
Shares used in per share calculations — diluted (3) | 113,388 |  |  | 119,542 |  |  | 120,939 |  |  | 117,442 |  |  | 117,620 |  |  | 118,206 |  |  | 117,398 |  |  | 116,629 |
______________________________________
(1) | The quarterly financial information includes the following amount related to restructuring charges as follows: $3.6 million in the quarter ended December 31, 2015. Refer to Note 15, "Restructuring Charges" of Notes to Consolidated Financial Statements of this Form 10-K.
(2) | The quarterly financial information includes the following amount related to benefit from income taxes related to the deferred tax asset valuation allowance reversal as follows: $174.5 million in the quarter ended September 30, 2015. Refer to Note 16, "Income Taxes" of Notes to Consolidated Financial Statements of this Form 10-K.
(3) | The quarterly financial information includes the impact of the accelerated share repurchase program as follows: 7.8 million shares repurchased in the quarter ended December 31, 2015. Refer to Note 13, "Stockholders' Equity" of Notes to Consolidated Financial Statements of this Form 10-K.

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=51825399&loc=d3e1280-108306 + Details
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