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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Summary of Reconciliation of Numerators and Denominators Used in Basic and Diluted Per Share Computations | The table below presents for the periods indicated a reconciliation of the numerators and denominators we used to compute basic and diluted net income per share for our Class A common stock and our Class B common stock:
|  | Three Months Ended June 30,
|  | 2021 |  | 2020
|  | Class A |  | Class B |  | Class A |  | Class B
|  | (in thousands, except per share data)
Basic earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of net income |  | $ | 13,482 |  |  | $ | 2,682 |  |  | $ | 18,665 |  |  | $ | 4,014 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average shares outstanding |  |  | 25,342 |  |  |  | 5,577 |  |  |  | 23,451 |  |  |  | 5,577 |
Basic earnings per share |  | $ | 0.53 |  |  | $ | 0.48 |  |  | $ | 0.80 |  |  | $ | 0.72 |
Diluted earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of net income |  | $ | 13,482 |  |  | $ | 2,682 |  |  | $ | 18,665 |  |  | $ | 4,014 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares used in basic computation |  |  | 25,342 |  |  |  | 5,577 |  |  |  | 23,451 |  |  |  | 5,577 |
Weighted-average shares effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Director and employee stock options |  |  | 252 |  |  |  | — |  |  |  | 199 |  |  |  | — |
Number of shares used in diluted computation |  |  | 25,594 |  |  |  | 5,577 |  |  |  | 23,650 |  |  |  | 5,577 |
Diluted earnings per share |  | $ | 0.53 |  |  | $ | 0.48 |  |  | $ | 0.79 |  |  | $ | 0.72 |
|  | Six Months Ended June 30,
|  | 2021 |  | 2020
|  | Class A |  | Class B |  | Class A |  | Class B
|  | (in thousands, except per share data)
Basic earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of net income |  | $ | 22,223 |  |  | $ | 4,471 |  |  | $ | 21,721 |  |  | $ | 4,689 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average shares outstanding |  |  | 25,057 |  |  |  | 5,577 |  |  |  | 23,356 |  |  |  | 5,577 |
Basic earnings per share |  | $ | 0.89 |  |  | $ | 0.80 |  |  | $ | 0.93 |  |  | $ | 0.84 |
Diluted earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of net income |  | $ | 22,223 |  |  | $ | 4,471 |  |  | $ | 21,721 |  |  | $ | 4,689 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares used in basic computation |  |  | 25,057 |  |  |  | 5,577 |  |  |  | 23,356 |  |  |  | 5,577 |
Weighted-average shares effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Director and employee stock options |  |  | 190 |  |  |  | — |  |  |  | 193 |  |  |  | — |
Number of shares used in diluted computation |  |  | 25,247 |  |  |  | 5,577 |  |  |  | 23,549 |  |  |  | 5,577 |
Diluted earnings per share |  | $ | 0.88 |  |  | $ | 0.80 |  |  | $ | 0.92 |  |  | $ | 0.84 |
Summary of Antidilutive Securities Excluded From Computation Of Earnings Per Share |
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Number of options to purchase Class A shares excluded |  |  | 4,952,276 |  |  |  | 6,183,992 |  |  |  | 4,952,276 |  |  |  | 6,183,992 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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