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Net Income Per Common Share (Reconciliation of Basic and Diluted Weighted Average Shares) (Details) - shares | 3 Months Ended | 9 Months Ended
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Oct. 01, 2021 | Sep. 25, 2020 | Oct. 01, 2021 | Sep. 25, 2020
Earnings Per Share [Abstract] |  |  |  |
Basic weighted average common shares outstanding | 29,813,530 | 30,053,457 | 30,038,249 | 29,985,879
Unvested restricted stock units and common stock subject to vesting requirements issued to employees and non-employees | 625,680 | 204,747 | 460,058 | 142,223
Common stock issuable upon the exercise of stock options and SARs | 2,436,600 | 2,145,238 | 2,373,075 | 2,206,450
Dilutive weighted average common shares outstanding | 32,875,810 | 32,403,442 | 32,871,382 | 32,334,552

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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=125511455&loc=d3e1505-109256 + Details
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=125511455&loc=d3e1448-109256 + Details
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