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Quarterly Financial Data (unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Data [Abstract] |
Quarterly Financial Data |
| First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
| (in thousands, except per share data)
2017 |  |  |  |  |  |  |
Net revenues | $ | 1,086,305 |  |  | $ | 1,134,671 |  |  | $ | 1,159,912 |  |  | $ | 1,226,583 |
Gross profit | 667,614 |  |  | 705,650 |  |  | 726,420 |  |  | 765,112 |
Income from operations | 258,256 |  |  | 294,258 |  |  | 310,747 |  |  | 346,983 |
Net earnings | 158,071 |  |  | 179,556 |  |  | 190,273 |  |  | 443,872 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |
Basic | $ | 1.55 |  |  | $ | 1.76 |  |  | $ | 1.86 |  |  | 4.33 |
Diluted | $ | 1.53 |  |  | $ | 1.74 |  |  | $ | 1.84 |  |  | 4.27 |
2016 |  |  |  |  |  |  |  |  |  |  |
Net revenues | $ | 902,423 |  |  | $ | 931,558 |  |  | $ | 945,144 |  |  | $ | 1,010,800 |
Gross profit | 559,519 |  |  | 567,520 |  |  | 578,493 |  |  | 626,878 |
Income from operations | 244,991 |  |  | 253,078 |  |  | 267,390 |  |  | 289,104 |
Net earnings | 151,416 |  |  | 158,069 |  |  | 167,079 |  |  | 182,081 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |
Basic | $ | 1.50 |  |  | $ | 1.56 |  |  | $ | 1.65 |  |  | $ | 1.79 |
Diluted | $ | 1.48 |  |  | $ | 1.54 |  |  | $ | 1.63 |  |  | $ | 1.78 |

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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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