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Earnings Per Share - Narrative (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Outstanding stock options to purchase common stock | 755,546 | 717,088 | 695,960
Outstanding stock options to purchase common stock, per share | $ 30.95 | $ 29.79 | $ 28.19
Restricted shares outstanding | 412,366 | 320,994 | 304,861
Common Class A [Member] |  |  |
Shares outstanding | 37,784,851 | 37,608,519 |

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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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