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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Selected Quarterly Financial Data | Selected quarterly financial data for 2019 and 2018 are as follows:
| Three Months Ended
| March(1) |  | June(2) |  | September(3) |  | December(4)
2019 |  |  |  |  |  |  |
Net sales | $ | 218,378 |  |  | $ | 238,263 |  |  | $ | 233,590 |  |  | $ | 264,865 |
Gross profit | 121,438 |  |  | 131,190 |  |  | 130,111 |  |  | 141,975 |
Net income | 1,021 |  |  | 5,695 |  |  | 6,970 |  |  | 14,933 |
EPS: |  |  |  |  |  |  |  |  |  |  |
Basic | $ | .04 |  |  | $ | .20 |  |  | $ | .25 |  |  | $ | .53 |
Diluted | .04 |  |  | .19 |  |  | .23 |  |  | .49 |
| Three Months Ended
| March |  | June |  | September(5) |  | December(6)
2018 |  |  |  |  |  |  |
Net sales | $ | 202,064 |  |  | $ | 212,820 |  |  | $ | 202,307 |  |  | $ | 242,444 |
Gross profit | 109,557 |  |  | 116,271 |  |  | 110,627 |  |  | 132,655 |
Net income | 10,657 |  |  | 8,719 |  |  | 5,825 |  |  | 15,653 |
EPS: |  |  |  |  |  |  |  |  |  |  |
Basic | $ | .38 |  |  | $ | .31 |  |  | $ | .21 |  |  | $ | .56 |
Diluted | .37 |  |  | .30 |  |  | .20 |  |  | .54 |

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118952077&loc=d3e1280-108306 + Details
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