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SELECTED QUARTERLY INFORMATION - UNAUDITED (Tables) | 12 Months Ended
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Dec. 31, 2017
Selected Quarterly Financial Information [Abstract] |
Selected Quarterly Information |
(In thousands, except per share data) |  |  |  |  |  |
Quarter | Total revenue, net |  | Gross margin |  | Net income |  | Per Share - Basic (1) |  | Per Share - Diluted (1)
2017 |  |  |  |  |  |  |  |  |
First | $ | 258,636 |  |  | $ | 172,051 |  |  | $ | 6,394 |  |  | $ | 0.09 |  |  | $ | 0.08 |
Second | 282,164 |  |  | 183,166 |  |  | 10,835 |  |  | 0.14 |  |  | 0.14 |
Third | 278,834 |  |  | 177,077 |  |  | 3,159 |  |  | 0.04 |  |  | 0.04 |
Fourth (3) (4) | 368,602 |  |  | 220,431 |  |  | 44,355 |  |  | 0.57 |  |  | 0.56 |
| $ | 1,188,236 |  |  | $ | 752,725 |  |  | $ | 64,743 |  |  |  |  |
2016 |  |  |  |  |  |  |  |  |
First (2) | $ | 236,770 |  |  | $ | 151,997 |  |  | $ | 13,419 |  |  | $ | 0.18 |  |  | $ | 0.18 |
Second | 249,309 |  |  | 159,744 |  |  | 12,755 |  |  | 0.17 |  |  | 0.16 |
Third | 250,332 |  |  | 161,003 |  |  | 20,144 |  |  | 0.27 |  |  | 0.25 |
Fourth | 255,664 |  |  | 170,242 |  |  | 28,246 |  |  | 0.38 |  |  | 0.35 |
| $ | 992,075 |  |  | $ | 642,986 |  |  | $ | 74,564 |  |  |  |  |
(1) Per common share amounts for the quarters and full years have been calculated separately. Accordingly, quarterly amounts do not necessarily add to the annual amount because of differences in the weighted average common shares outstanding during each period principally due to the effect of the Company’s issuing shares of its common stock during the year. (2) The net income for first quarter of 2016 was adjusted to reflect the effect of the adoption of ASU 2016-09 in second quarter of 2016 of $1.8 million. The earning per share were also restated to reflect the adoption of ASU 2016-09. (3) The net income for the fourth quarter of 2017 includes gain on sale of business of $2.6 million related to Divestiture to Natus. (4) The net income for the fourth quarter of 2017 includes benefit from income taxes of $43.4 million related to the re-measurement of our deferred taxes resulting from a reduction of the federal statutory rate from 35% to 21% from the 2017 Tax Act (see Note 11, Income Taxes).

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, 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=84173487&loc=d3e1280-108306 + Details
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