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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Pay vs Performance Disclosure |  |  |  |
Pay vs Performance Disclosure, Table | Pay versus Performance Linking pay and performance is an important component of MarineMax's compensation philosophy and aligns to the interests of our shareholders. The Compensation Committee believes that the Company’s compensation plans and programs provide strong pay and performance alignment as demonstrated and described through the Compensation Discussion and Analysis section of this proxy statement. The following Pay versus Performance disclosure is calculated in a manner consistent with SEC rules. As required by Section 953(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 402(v) of Regulation S-K, we are providing the following table, which sets forth information concerning the compensation of our Principal Executive Officer ("PEO") and Non-Principal Executive Officers ("Non-PEO NEOs") for each of the fiscal years ended September 30, 2021, 2022, 2023 and 2024, and our financial performance for each such fiscal year:
|  |  |  |  |  |  |  |  |  | Value of Initial Fixed $100 Investment Based On (c): |  |  |  |  |
Year (a) |  | Summary Compensation Table Total for PEO |  | Compensation Actually Paid to PEO (b) |  | Average Summary Compensation Table Total for Non-PEO NEOs |  | Average Compensation Actually Paid to non-PEO NEOs (b) |  | Total Shareholder Return (c) |  | Peer Group Total Shareholder Return (c) |  | Net Income attributable to MarineMax, Inc. |  | Company Selected Measure: Diluted net income per common share (d) |
| 2024 |  |  | 6,451,890 |  |  | 7,131,898 |  |  | 2,300,236 |  |  | 2,435,118 |  | $ | 137.40 |  | $ | 140.30 |  |  | 38,066,000 |  | $ | 1.65 |
| 2023 |  |  | 6,006,138 |  |  | 5,900,178 |  |  | 2,071,320 |  |  | 2,101,614 |  | $ | 127.85 |  | $ | 98.36 |  |  | 109,282,000 |  | $ | 4.87 |
| 2022 |  |  | 5,457,691 |  |  | 2,472,379 |  |  | 1,807,465 |  |  | 919,296 |  | $ | 116.05 |  | $ | 86.45 |  |  | 197,989,000 |  | $ | 8.84 |
| 2021 |  |  | 3,971,985 |  |  | 8,516,604 |  |  | 1,514,094 |  |  | 3,081,533 |  | $ | 189.01 |  | $ | 114.29 |  |  | 154,979,000 |  | $ | 6.78 |
(a) NEOs included in the compensation columns reflect the following:
Year |  | PEO | Non-PEO NEOs |  |  |  |
| 2024 |  | W. Brett McGill | William H. McGill, Jr., Michael H. McLamb, Charles A. Cashman, Kyle G. Langbehn, Shawn Berg
| 2023 |  | W. Brett McGill | William H. McGill, Jr., Michael H. McLamb, Charles A. Cashman, Kyle G. Langbehn
| 2022 |  | W. Brett McGill | William H. McGill, Jr., Michael H. McLamb, Charles A. Cashman, Anthony E. Cassella, Jr.
| 2021 |  | W. Brett McGill | William H. McGill, Jr., Michael H. McLamb, Charles A. Cashman, Anthony E. Cassella, Jr.
(b) The Summary Compensation Table totals reported for the PEOs and the average of the Non-PEO NEOs for each fiscal year were subject to the following adjustments per Item 402(v)(2)(iii) of Regulation S-K to calculate "Compensation Actually Paid”:
| 2024 |  |  | 2023 |  |  | 2022 |  |  | 2021 |
| PEO |  | Average for Non-PEO NEOs |  |  | PEO |  | Average for Non-PEO NEOs |  |  | PEO |  | Average for Non-PEO NEOs |  |  | PEO |  | Average for Non-PEO NEOs |
Summary Compensation Table - Total Compensation |  | 6,451,890 |  |  | 2,300,236 |  |  |  | 6,006,138 |  |  | 2,071,320 |  |  |  | 5,457,691 |  |  | 1,807,465 |  |  |  | 3,971,985 |  |  | 1,514,094 |
Adjustments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deduction for amount reported under the “Stock Awards” and “Option Awards” Columns of the Summary Compensation Table |  | (4,249,992 | ) |  | (938,999 | ) |  |  | (3,802,488 | ) |  | (961,995 | ) |  |  | (2,771,009 | ) |  | (677,865 | ) |  |  | (1,442,985 | ) |  | (416,993 | )
Increase/deduction for the Inclusion of Item 402(v) Equity Values (e): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year End Fair Value of Equity Awards Granted in Fiscal Year and Unvested as of Fiscal Year End |  | 3,912,607 |  |  | 751,463 |  |  |  | 2,853,863 |  |  | 722,007 |  |  |  | 1,967,242 |  |  | 481,257 |  |  |  | 2,886,212 |  |  | 834,071 |
Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards Granted in Prior Fiscal Years |  | 177,164 |  |  | 38,406 |  |  |  | 179,831 |  |  | 56,574 |  |  |  | (1,001,343 | ) |  | (330,350 | ) |  |  | 1,545,208 |  |  | 668,345 |
Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Fiscal Year |  | 658,949 |  |  | 223,332 |  |  |  | 480,583 |  |  | 121,573 |  |  |  | 199,206 |  |  | 48,707 |  |  |  | 292,236 |  |  | 84,437 |
Change in Fair Value from Prior Fiscal Year End to Vesting Date of Equity Awards Granted in Prior Years that Vested in the Fiscal Year |  | 181,280 |  |  | 60,680 |  |  |  | 182,251 |  |  | 92,135 |  |  |  | (1,379,408 | ) |  | (409,918 | ) |  |  | 1,263,948 |  |  | 397,579 |
Fair Value at the End of the Prior Fiscal Year of Equity Awards Granted in Prior Fiscal Years that Failed to Meet Vesting Conditions in the Fiscal Year |  | - |  |  | - |  |  |  | - |  |  | - |  |  |  | - |  |  | - |  |  |  | - |  |  | - |
Value of Dividends or other Earnings Paid on Stock or Option Awards not Otherwise Reflected in Fair Value or Total Compensation in the Summary Compensation Table for the Fiscal Year |  | - |  |  | - |  |  |  | - |  |  | - |  |  |  | - |  |  | - |  |  |  | - |  |  | - |
Total Adjustments |  | 680,008 |  |  | 134,882 |  |  |  | (105,960 | ) |  | 30,294 |  |  |  | (2,985,312 | ) |  | (888,169 | ) |  |  | 4,544,619 |  |  | 1,567,439 |
Compensation Actually Paid |  | 7,131,898 |  |  | 2,435,118 |  |  |  | 5,900,178 |  |  | 2,101,614 |  |  |  | 2,472,379 |  |  | 919,296 |  |  |  | 8,516,604 |  |  | 3,081,533 |
(c) TSR and Peer Group TSR: Peer Group TSR reflects the Dow Jones US Retail Total Stock Market Index as reflected in our Annual Report on the Form 10-K pursuant to Item 201(e) of Regulation S-K for the fiscal year ended September 30, 2024. Each year of TSR and Peer Group TSR reflects what the cumulative value of $100 would be, if such amount were invested on September 30, 2020. (d) The Company has identified diluted net income per common share as the company-selected measure for the pay versus performance disclosure, as it represents the most important financial performance measure used to link compensation actually paid to the PEO and the Non-PEO NEOs in 2024 to the Company’s performance. (e) The amounts shown in this table represent the fair value of RSU awards determined in accordance with ASC 718. The assumptions used in determining the fair value of stock option and restricted stock awards are set forth in Note 14 to the Consolidated Financial Statements in our Form 10-K for the year ended September 30, 2024. Each named executive officer forfeits the unvested portion, if any, of the officer’s RSUs if the officer’s service to our Company is terminated for any reason, except upon death, as may otherwise be determined by the Board of Directors or as provided in an employment agreement. Narrative Disclosure to Pay Versus Performance Table Relationship Between Financial Performance Measures The graphs below compare the compensation actually paid to our PEO and the average of the compensation actually paid to our remaining NEOs, with (i) our net income, (ii) our diluted net income per common share, and (iii) our cumulative TSR, as well as the relationship between our TSR and the Peer Group TSR, in each case, for the fiscal years ended September 30, 2021, 2022, 2023 and 2024. Pay Versus Performance Tabular List We believe diluted net income per common share represents the most important financial performance measure used by us to link compensation actually paid to our NEOs for the fiscal year ended September 30, 2024. In the “Compensation Discussion and Analysis” section of this proxy statement, we provide greater detail on the elements of our executive compensation program and our “pay-for-performance” compensation philosophy. We believe the Company’s executive compensation program appropriately rewards our PEO and the Non-PEO NEOs for Company and individual performance, promotes retention of our senior leadership team and supports long-term value creation for our stockholders. For 2024, the following list represents the most important financial performance measures we used to link Compensation Actually Paid with our financial performance, as further discussed in the “Compensation Discussion and Analysis” section:
Diluted Net Income Per Common Share | Pretax Income | Aged Inventory Targets | Net Promoter Score
Company Selected Measure Name | diluted net income per common share |  |  |
Named Executive Officers, Footnote |
|  |  |  |  |  |  |  |  |  | Value of Initial Fixed $100 Investment Based On (c): |  |  |  |  |
Year (a) |  | Summary Compensation Table Total for PEO |  | Compensation Actually Paid to PEO (b) |  | Average Summary Compensation Table Total for Non-PEO NEOs |  | Average Compensation Actually Paid to non-PEO NEOs (b) |  | Total Shareholder Return (c) |  | Peer Group Total Shareholder Return (c) |  | Net Income attributable to MarineMax, Inc. |  | Company Selected Measure: Diluted net income per common share (d) |
| 2024 |  |  | 6,451,890 |  |  | 7,131,898 |  |  | 2,300,236 |  |  | 2,435,118 |  | $ | 137.40 |  | $ | 140.30 |  |  | 38,066,000 |  | $ | 1.65 |
| 2023 |  |  | 6,006,138 |  |  | 5,900,178 |  |  | 2,071,320 |  |  | 2,101,614 |  | $ | 127.85 |  | $ | 98.36 |  |  | 109,282,000 |  | $ | 4.87 |
| 2022 |  |  | 5,457,691 |  |  | 2,472,379 |  |  | 1,807,465 |  |  | 919,296 |  | $ | 116.05 |  | $ | 86.45 |  |  | 197,989,000 |  | $ | 8.84 |
| 2021 |  |  | 3,971,985 |  |  | 8,516,604 |  |  | 1,514,094 |  |  | 3,081,533 |  | $ | 189.01 |  | $ | 114.29 |  |  | 154,979,000 |  | $ | 6.78 |
Peer Group Issuers, Footnote | (c) TSR and Peer Group TSR: Peer Group TSR reflects the Dow Jones US Retail Total Stock Market Index as reflected in our Annual Report on the Form 10-K pursuant to Item 201(e) of Regulation S-K for the fiscal year ended September 30, 2024. Each year of TSR and Peer Group TSR reflects what the cumulative value of $100 would be, if such amount were invested on September 30, 2020. |  |  |
PEO Total Compensation Amount | $ 6,451,890 | $ 6,006,138 | $ 5,457,691 | $ 3,971,985
PEO Actually Paid Compensation Amount | $ 7,131,898 | 5,900,178 | 2,472,379 | 8,516,604
Adjustment To PEO Compensation, Footnote | (d) The Company has identified diluted net income per common share as the company-selected measure for the pay versus performance disclosure, as it represents the most important financial performance measure used to link compensation actually paid to the PEO and the Non-PEO NEOs in 2024 to the Company’s performance. (e) The amounts shown in this table represent the fair value of RSU awards determined in accordance with ASC 718. The assumptions used in determining the fair value of stock option and restricted stock awards are set forth in Note 14 to the Consolidated Financial Statements in our Form 10-K for the year ended September 30, 2024. Each named executive officer forfeits the unvested portion, if any, of the officer’s RSUs if the officer’s service to our Company is terminated for any reason, except upon death, as may otherwise be determined by the Board of Directors or as provided in an employment agreement. |  |  |
Non-PEO NEO Average Total Compensation Amount | $ 2,300,236 | 2,071,320 | 1,807,465 | 1,514,094
Non-PEO NEO Average Compensation Actually Paid Amount | $ 2,435,118 | 2,101,614 | 919,296 | 3,081,533
Adjustment to Non-PEO NEO Compensation Footnote | (d) The Company has identified diluted net income per common share as the company-selected measure for the pay versus performance disclosure, as it represents the most important financial performance measure used to link compensation actually paid to the PEO and the Non-PEO NEOs in 2024 to the Company’s performance. (e) The amounts shown in this table represent the fair value of RSU awards determined in accordance with ASC 718. The assumptions used in determining the fair value of stock option and restricted stock awards are set forth in Note 14 to the Consolidated Financial Statements in our Form 10-K for the year ended September 30, 2024. Each named executive officer forfeits the unvested portion, if any, of the officer’s RSUs if the officer’s service to our Company is terminated for any reason, except upon death, as may otherwise be determined by the Board of Directors or as provided in an employment agreement. |  |  |
Compensation Actually Paid vs. Total Shareholder Return |  |  |  |
Compensation Actually Paid vs. Net Income |  |  |  |
Compensation Actually Paid vs. Company Selected Measure |  |  |  |
Total Shareholder Return Vs Peer Group |  |  |  |
Tabular List, Table | For 2024, the following list represents the most important financial performance measures we used to link Compensation Actually Paid with our financial performance, as further discussed in the “Compensation Discussion and Analysis” section:
Diluted Net Income Per Common Share | Pretax Income | Aged Inventory Targets | Net Promoter Score
Total Shareholder Return Amount | $ 137.4 | 127.85 | 116.05 | 189.01
Peer Group Total Shareholder Return Amount | 140.3 | 98.36 | 86.45 | 114.29
Net Income (Loss) | $ 38,066,000 | $ 109,282,000 | $ 197,989,000 | $ 154,979,000
Company Selected Measure Amount | 1.65 | 4.87 | 8.84 | 6.78
PEO Name | W. Brett McGill | W. Brett McGill | W. Brett McGill | W. Brett McGill
Compensation Actually Paid Adjustment [Table Text Block] | (b) The Summary Compensation Table totals reported for the PEOs and the average of the Non-PEO NEOs for each fiscal year were subject to the following adjustments per Item 402(v)(2)(iii) of Regulation S-K to calculate "Compensation Actually Paid”:
| 2024 |  |  | 2023 |  |  | 2022 |  |  | 2021 |
| PEO |  | Average for Non-PEO NEOs |  |  | PEO |  | Average for Non-PEO NEOs |  |  | PEO |  | Average for Non-PEO NEOs |  |  | PEO |  | Average for Non-PEO NEOs |
Summary Compensation Table - Total Compensation |  | 6,451,890 |  |  | 2,300,236 |  |  |  | 6,006,138 |  |  | 2,071,320 |  |  |  | 5,457,691 |  |  | 1,807,465 |  |  |  | 3,971,985 |  |  | 1,514,094 |
Adjustments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deduction for amount reported under the “Stock Awards” and “Option Awards” Columns of the Summary Compensation Table |  | (4,249,992 | ) |  | (938,999 | ) |  |  | (3,802,488 | ) |  | (961,995 | ) |  |  | (2,771,009 | ) |  | (677,865 | ) |  |  | (1,442,985 | ) |  | (416,993 | )
Increase/deduction for the Inclusion of Item 402(v) Equity Values (e): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year End Fair Value of Equity Awards Granted in Fiscal Year and Unvested as of Fiscal Year End |  | 3,912,607 |  |  | 751,463 |  |  |  | 2,853,863 |  |  | 722,007 |  |  |  | 1,967,242 |  |  | 481,257 |  |  |  | 2,886,212 |  |  | 834,071 |
Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards Granted in Prior Fiscal Years |  | 177,164 |  |  | 38,406 |  |  |  | 179,831 |  |  | 56,574 |  |  |  | (1,001,343 | ) |  | (330,350 | ) |  |  | 1,545,208 |  |  | 668,345 |
Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Fiscal Year |  | 658,949 |  |  | 223,332 |  |  |  | 480,583 |  |  | 121,573 |  |  |  | 199,206 |  |  | 48,707 |  |  |  | 292,236 |  |  | 84,437 |
Change in Fair Value from Prior Fiscal Year End to Vesting Date of Equity Awards Granted in Prior Years that Vested in the Fiscal Year |  | 181,280 |  |  | 60,680 |  |  |  | 182,251 |  |  | 92,135 |  |  |  | (1,379,408 | ) |  | (409,918 | ) |  |  | 1,263,948 |  |  | 397,579 |
Fair Value at the End of the Prior Fiscal Year of Equity Awards Granted in Prior Fiscal Years that Failed to Meet Vesting Conditions in the Fiscal Year |  | - |  |  | - |  |  |  | - |  |  | - |  |  |  | - |  |  | - |  |  |  | - |  |  | - |
Value of Dividends or other Earnings Paid on Stock or Option Awards not Otherwise Reflected in Fair Value or Total Compensation in the Summary Compensation Table for the Fiscal Year |  | - |  |  | - |  |  |  | - |  |  | - |  |  |  | - |  |  | - |  |  |  | - |  |  | - |
Total Adjustments |  | 680,008 |  |  | 134,882 |  |  |  | (105,960 | ) |  | 30,294 |  |  |  | (2,985,312 | ) |  | (888,169 | ) |  |  | 4,544,619 |  |  | 1,567,439 |
Compensation Actually Paid |  | 7,131,898 |  |  | 2,435,118 |  |  |  | 5,900,178 |  |  | 2,101,614 |  |  |  | 2,472,379 |  |  | 919,296 |  |  |  | 8,516,604 |  |  | 3,081,533 |
Measure:: 1 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Diluted Net Income Per Common Share |  |  |
Measure:: 2 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Pretax Income |  |  |
Measure:: 3 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Aged Inventory Targets |  |  |
Measure:: 4 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Net Promoter Score |  |  |
PEO |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | $ 680,008 | $ (105,960) | $ (2,985,312) | $ 4,544,619
PEO | Deduction For Amount Reported Under The Stock Awards And Option Awards Colums Of The Summary Compensation Table [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (4,249,992) | (3,802,488) | (2,771,009) | (1,442,985)
PEO | Year End Fair Value of Equity Awards Granted in Fiscal Year and Unvested as of Fiscal Year End [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 3,912,607 | 2,853,863 | 1,967,242 | 2,886,212
PEO | Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards Granted in Prior Fiscal Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 177,164 | 179,831 | (1,001,343) | 1,545,208
PEO | Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Fiscal Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 658,949 | 480,583 | 199,206 | 292,236
PEO | Change in Fair Value from Prior Fiscal Year End to Vesting Date of Equity Awards Granted in Prior Years that Vested in the Fiscal Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 181,280 | 182,251 | (1,379,408) | 1,263,948
Non-PEO NEO |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 134,882 | 30,294 | (888,169) | 1,567,439
Non-PEO NEO | Deduction For Amount Reported Under The Stock Awards And Option Awards Colums Of The Summary Compensation Table [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (938,999) | (961,995) | (677,865) | (416,993)
Non-PEO NEO | Year End Fair Value of Equity Awards Granted in Fiscal Year and Unvested as of Fiscal Year End [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 751,463 | 722,007 | 481,257 | 834,071
Non-PEO NEO | Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards Granted in Prior Fiscal Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 38,406 | 56,574 | (330,350) | 668,345
Non-PEO NEO | Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Fiscal Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 223,332 | 121,573 | 48,707 | 84,437
Non-PEO NEO | Change in Fair Value from Prior Fiscal Year End to Vesting Date of Equity Awards Granted in Prior Years that Vested in the Fiscal Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | $ 60,680 | $ 92,135 | $ (409,918) | $ 397,579

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