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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2020
Selected Quarterly Financial Data (Unaudited) [Abstract] |
Selected Quarterly Financial Data | The following is a summary of the unaudited quarterly results of operations for the years ended December 31, 2020 and 2019 (in thousands, except per share data):
|  | 2020 Quarter Ended |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
Net sales |  | $ | 179,432 |  |  | $ | 109,968 |  |  | $ | 217,513 |  |  | $ | 241,339 |
Gross profit |  |  | 99,553 |  |  |  | 59,646 |  |  |  | 122,177 |  |  |  | 137,619 |
Income before taxes |  |  | 2,300 |  |  |  | 18,625 |  |  |  | 24,532 |  |  |  | 31,274 |
Net income |  |  | 1,819 |  |  |  | 13,640 |  |  |  | 18,261 |  |  |  | 25,428 |
Basic net earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common |  |  | 0.10 |  |  |  | 0.73 |  |  |  | 0.98 |  |  |  | 1.40 |
Class A Common |  |  | 0.09 |  |  |  | 0.69 |  |  |  | 0.94 |  |  |  | 1.33 |
Diluted net earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common |  |  | 0.09 |  |  |  | 0.72 |  |  |  | 0.97 |  |  |  | 1.37 |
Class A Common |  |  | 0.09 |  |  |  | 0.69 |  |  |  | 0.93 |  |  |  | 1.35 |
|  | 2019 Quarter Ended |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
Net sales |  | $ | 187,242 |  |  | $ | 191,893 |  |  | $ | 209,320 |  |  | $ | 213,837 |
Gross profit |  |  | 103,083 |  |  |  | 103,557 |  |  |  | 112,019 |  |  |  | 115,830 |
Income before taxes |  |  | 4,725 |  |  |  | 8,237 |  |  |  | 8,169 |  |  |  | 7,592 |
Net income |  |  | 3,621 |  |  |  | 6,046 |  |  |  | 6,097 |  |  |  | 6,100 |
Basic net earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common |  |  | 0.18 |  |  |  | 0.30 |  |  |  | 0.31 |  |  |  | 0.32 |
Class A Common |  |  | 0.17 |  |  |  | 0.28 |  |  |  | 0.30 |  |  |  | 0.30 |
Diluted net earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common |  |  | 0.17 |  |  |  | 0.29 |  |  |  | 0.31 |  |  |  | 0.31 |
Class A Common |  |  | 0.17 |  |  |  | 0.27 |  |  |  | 0.30 |  |  |  | 0.30 |

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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=121640914&loc=d3e1280-108306 + Details
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