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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure |  |  |  |
Pay vs Performance Disclosure, Table | Pay Versus Performance 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 information about the relationship between executive “Compensation Actually Paid” (or “CAP”), as defined by SEC rules, and certain of our financial performance metrics. For further information concerning our variable pay-for-performance philosophy and how we align executive compensation with our performance, refer to the “Compensation Discussion and Analysis” section of this proxy statement.
Year |  | Summary Compensation Table Total for CEO |  |  | Compensation Actually Paid to CEO |  |  | Average Summary Compensation Table Total for Non-CEO NEOs |  |  | Average Compensation Actually Paid to Non-CEO NEOs |  |  | Value of Initial Fixed $100 Investment Based On: |  |  | Net Income (in thousands) |  |  | AFFO per Share |
|  | Total Shareholder Return |  |  |  | Peer Group Total Shareholder Return |
(a) |  |  | (b) |  |  |  | (c) |  |  |  | (d) |  |  |  | (e) |  |  |  | (f) |  |  |  | (g) |  |  |  | (h) |  |  |  | (i) |
2023 |  | $ | 11,261,032 |  |  | $ | 7,851,613 |  |  | $ | 3,504,909 |  |  | $ | 2,695,520 |  |  | $ | 109.31 |  |  | $ | 100.41 |  |  | $ | 501,812 |  |  | $ | 13.08 |
2022 |  | $ | 13,334,754 |  |  | ($ | 4,794,761 | ) |  | $ | 5,207,307 |  |  | ($ | 1,385,547 | ) |  | $ | 119.01 |  |  | $ | 100.87 |  |  | $ | 461,429 |  |  | $ | 12.25 |
2021 |  | $ | 9,995,179 |  |  | $ | 32,023,793 |  |  | $ | 3,949,044 |  |  | $ | 11,961,853 |  |  | $ | 163.70 |  |  | $ | 140.99 |  |  | $ | 237,624 |  |  | $ | 10.74 |
2020 |  | $ | 12,819,044 |  |  | $ | 26,154,495 |  |  | $ | 4,956,287 |  |  | $ | 9,750,582 |  |  | $ | 117.81 |  |  | $ | 105.39 |  |  | $ | 24,104 |  |  | $ | 9.43 |
Column (b) . Reflects compensation amounts reported in the “Summary Compensation Table” or “SCT” for our former CEO, Jeffrey A. Stoops, for the respective years shown. Column (c) . CAP for our former CEO in each of 2023, 2022, 2021 and 2020 reflects the respective amounts set forth in column (b), adjusted as set forth in the table below, as determined in accordance with SEC rules. The dollar amounts reflected in column (c) do not reflect the actual amount of compensation earned by or paid to our former CEO during the applicable year. For information regarding decisions made by our Compensation Committee with respect to the former CEO’s compensation for each fiscal year, please see the “Compensation Discussion and Analysis” section of this proxy statement and the proxy statements for the 2023, 2022 and 2021 annual meetings of shareholders.
Year |  | 2020 |  |  | 2021 |  |  | 2022 |  |  | 2023 |
CEO |  |  | Mr. Stoops |  |  |  | Mr. Stoops |  |  |  | Mr. Stoops |  |  |  | Mr. Stoops |
SCT Total Compensation ($) |  |  | 12,819,044 |  |  |  | 9,995,179 |  |  |  | 13,334,754 |  |  |  | 11,261,032 |
Less: Stock and Option Award Values Reported in SCT for the Covered Year on Grant Date ($) |  |  | (10,198,671 | ) |  |  | (7,172,549 | ) |  |  | (9,901,690 | ) |  |  | (8,148,621 | )
Plus: Fair Value for Stock and Option Awards Granted in the Covered Year at Year-End ($) |  |  | 9,276,084 |  |  |  | 13,925,505 |  |  |  | 7,855,626 |  |  |  | 7,606,781 |
Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years ($) |  |  | 6,726,551 |  |  |  | 20,039,610 |  |  |  | (11,218,937 | ) |  |  | (1,005,888 | )
Change in Fair Value of Stock and Option Awards from Prior Years that Vested in the Covered Year ($) |  |  | 7,531,487 |  |  |  | (4,763,952 | ) |  |  | (4,864,514 | ) |  |  | (1,656,336 | )
Less: Fair Value of Stock and Option Awards Forfeited during the Covered Year ($) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (205,355 | )
Compensation Actually Paid ($) |  |  | 26,154,495 |  |  |  | 32,023,793 |  |  |  | (4,794,761 | ) |  |  | 7,851,613 |
Equity Valuations: For performance restricted stock unit awards, the grant date fair value of awards used for SCT calculations assumes target performance. To determine the year-end fair values used in the CAP calculations, we have updated the performance expectations to reflect the latest performance estimates for unvested and outstanding awards at each fiscal year-end date. For options awards, updated market input assumptions (stock price, risk free interest rate, volatility, expected term and future dividend yield expectations) have been used to determine the fair values of outstanding awards as of the identified vesting dates and the relevant fiscal year-end dates using the Black-Scholes option pricing model. Column (d) . The following non-CEO named executive officers are included in the average figures shown for 2022, 2021 and 2020: Brendan T. Cavanagh, Kurt L. Bagwell, Thomas P. Hunt and Jason V. Silberstein and for 2023: Brendan T. Cavanagh, Jason V. Silberstein, Mark R. Ciarfella, and Richard M. Cane. Column (e) . Average CAP for our non-CEO NEOs in each of 2023, 2022, 2021 and 2020 reflects the respective amounts set forth in column (d), adjusted as set forth in the table below, as determined in accordance with SEC rules. The dollar amounts reflected in column (e) do not reflect the actual amount of compensation earned by or paid to our non-CEO NEOs during the applicable year. For information regarding the decisions made by our Compensation Committee with respect to the non-CEO NEOs’ compensation for each fiscal year, please see the “Compensation Discussion and Analysis” section of this proxy statement and the proxy statements for the 2023, 2022 and 2021 annual meetings of shareholders.
Year |  | 2020 |  |  | 2021 |  |  | 2022 |  |  | 2023 |
Non-CEO NEOs |  | See column (d) note |  |  | See column (d) note |  |  | See column (d) note |  |  | See column (d) note |
SCT Total Compensation ($) |  |  | 4,956,287 |  |  |  | 3,949,044 |  |  |  | 5,207,307 |  |  |  | 3,504,909 |
Less: Stock and Option Award Values Reported in SCT for the Covered Year on Grant Date ($) |  |  | (3,734,188 | ) |  |  | (2,585,499 | ) |  |  | (3,598,186 | ) |  |  | (2,283,870 | )
Plus: Fair Value for Stock and Option Awards Granted in the Covered Year at Year-End ($) |  |  | 3,396,388 |  |  |  | 5,019,747 |  |  |  | 2,854,664 |  |  |  | 2,132,004 |
Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years ($) |  |  | 2,427,861 |  |  |  | 7,293,395 |  |  |  | (4,086,208 | ) |  |  | (233,781 | )
Change in Fair Value of Stock and Option Awards from Prior Years that Vested in the Covered Year ($) |  |  | 2,704,234 |  |  |  | (1,714,834 | ) |  |  | (1,763,124 | ) |  |  | (376,014 | )
Less: Fair Value of Stock and Option Awards Forfeited during the Covered Year ($) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (47,728 | )
Compensation Actually Paid ($) |  |  | 9,750,582 |  |  |  | 11,961,853 |  |  |  | (1,385,547 | ) |  |  | 2,695,520 |
Equity Valuations: For performance restricted stock unit awards, the grant date fair value of awards used for SCT calculations assumes target performance. To determine the year-end fair values used in the CAP calculations, we have updated the performance expectations to reflect the latest performance estimates for unvested and outstanding awards at each fiscal year-end date. For options awards, updated market input assumptions (stock price, risk free interest rate, volatility, expected term and future dividend yield expectations) have been used to determine the fair values of outstanding awards as of the identified vesting dates and the relevant fiscal year-end dates using the Black-Scholes option pricing model. Column (f) . For the relevant fiscal year, represents the cumulative total shareholder return (TSR) of SBA for the measurement periods ending on December 31 of each of 2023, 2022, 2021 and 2020, respectively. Column (g ). For the relevant fiscal year, represents the cumulative TSR of our Large Public Tower Company Peer Group for the measurement periods ending on December 31 of each of 2023, 2022, 2021 and 2020, respectively. The Large Public Tower Company Peer Group for each of 2023, 2022, 2021 and 2020 consisted of the following companies: American Tower Corporation and Crown Castle International Corp. Column (h) . Reflects “Net Income” in our consolidated income statements included in our Annual Reports on Form 10-K for each of the years ended December 31, 2023, 2022, 2021 and 2020. Column (i) . Company-selected Measure is AFFO per Share, which is described below. |  |  |
Company Selected Measure Name | AFFO per Share |  |  |
Named Executive Officers, Footnote | The following non-CEO named executive officers are included in the average figures shown for 2022, 2021 and 2020: Brendan T. Cavanagh, Kurt L. Bagwell, Thomas P. Hunt and Jason V. Silberstein and for 2023: Brendan T. Cavanagh, Jason V. Silberstein, Mark R. Ciarfella, and Richard M. Cane. |  |  |
Peer Group Issuers, Footnote | For the relevant fiscal year, represents the cumulative TSR of our Large Public Tower Company Peer Group for the measurement periods ending on December 31 of each of 2023, 2022, 2021 and 2020, respectively. The Large Public Tower Company Peer Group for each of 2023, 2022, 2021 and 2020 consisted of the following companies: American Tower Corporation and Crown Castle International Corp. |  |  |
PEO Total Compensation Amount | $ 11,261,032 | $ 13,334,754 | $ 9,995,179 | $ 12,819,044
PEO Actually Paid Compensation Amount | $ 7,851,613 | (4,794,761) | 32,023,793 | 26,154,495
Adjustment To PEO Compensation, Footnote | Column (c) . CAP for our former CEO in each of 2023, 2022, 2021 and 2020 reflects the respective amounts set forth in column (b), adjusted as set forth in the table below, as determined in accordance with SEC rules. The dollar amounts reflected in column (c) do not reflect the actual amount of compensation earned by or paid to our former CEO during the applicable year. For information regarding decisions made by our Compensation Committee with respect to the former CEO’s compensation for each fiscal year, please see the “Compensation Discussion and Analysis” section of this proxy statement and the proxy statements for the 2023, 2022 and 2021 annual meetings of shareholders.
Year |  | 2020 |  |  | 2021 |  |  | 2022 |  |  | 2023 |
CEO |  |  | Mr. Stoops |  |  |  | Mr. Stoops |  |  |  | Mr. Stoops |  |  |  | Mr. Stoops |
SCT Total Compensation ($) |  |  | 12,819,044 |  |  |  | 9,995,179 |  |  |  | 13,334,754 |  |  |  | 11,261,032 |
Less: Stock and Option Award Values Reported in SCT for the Covered Year on Grant Date ($) |  |  | (10,198,671 | ) |  |  | (7,172,549 | ) |  |  | (9,901,690 | ) |  |  | (8,148,621 | )
Plus: Fair Value for Stock and Option Awards Granted in the Covered Year at Year-End ($) |  |  | 9,276,084 |  |  |  | 13,925,505 |  |  |  | 7,855,626 |  |  |  | 7,606,781 |
Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years ($) |  |  | 6,726,551 |  |  |  | 20,039,610 |  |  |  | (11,218,937 | ) |  |  | (1,005,888 | )
Change in Fair Value of Stock and Option Awards from Prior Years that Vested in the Covered Year ($) |  |  | 7,531,487 |  |  |  | (4,763,952 | ) |  |  | (4,864,514 | ) |  |  | (1,656,336 | )
Less: Fair Value of Stock and Option Awards Forfeited during the Covered Year ($) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (205,355 | )
Compensation Actually Paid ($) |  |  | 26,154,495 |  |  |  | 32,023,793 |  |  |  | (4,794,761 | ) |  |  | 7,851,613 |
Equity Valuations: For performance restricted stock unit awards, the grant date fair value of awards used for SCT calculations assumes target performance. To determine the year-end fair values used in the CAP calculations, we have updated the performance expectations to reflect the latest performance estimates for unvested and outstanding awards at each fiscal year-end date. For options awards, updated market input assumptions (stock price, risk free interest rate, volatility, expected term and future dividend yield expectations) have been used to determine the fair values of outstanding awards as of the identified vesting dates and the relevant fiscal year-end dates using the Black-Scholes option pricing model. |  |  |
Non-PEO NEO Average Total Compensation Amount | $ 3,504,909 | 5,207,307 | 3,949,044 | 4,956,287
Non-PEO NEO Average Compensation Actually Paid Amount | $ 2,695,520 | (1,385,547) | 11,961,853 | 9,750,582
Adjustment to Non-PEO NEO Compensation Footnote | Column (e) . Average CAP for our non-CEO NEOs in each of 2023, 2022, 2021 and 2020 reflects the respective amounts set forth in column (d), adjusted as set forth in the table below, as determined in accordance with SEC rules. The dollar amounts reflected in column (e) do not reflect the actual amount of compensation earned by or paid to our non-CEO NEOs during the applicable year. For information regarding the decisions made by our Compensation Committee with respect to the non-CEO NEOs’ compensation for each fiscal year, please see the “Compensation Discussion and Analysis” section of this proxy statement and the proxy statements for the 2023, 2022 and 2021 annual meetings of shareholders.
Year |  | 2020 |  |  | 2021 |  |  | 2022 |  |  | 2023 |
Non-CEO NEOs |  | See column (d) note |  |  | See column (d) note |  |  | See column (d) note |  |  | See column (d) note |
SCT Total Compensation ($) |  |  | 4,956,287 |  |  |  | 3,949,044 |  |  |  | 5,207,307 |  |  |  | 3,504,909 |
Less: Stock and Option Award Values Reported in SCT for the Covered Year on Grant Date ($) |  |  | (3,734,188 | ) |  |  | (2,585,499 | ) |  |  | (3,598,186 | ) |  |  | (2,283,870 | )
Plus: Fair Value for Stock and Option Awards Granted in the Covered Year at Year-End ($) |  |  | 3,396,388 |  |  |  | 5,019,747 |  |  |  | 2,854,664 |  |  |  | 2,132,004 |
Change in Fair Value of Outstanding Unvested Stock and Option Awards from Prior Years ($) |  |  | 2,427,861 |  |  |  | 7,293,395 |  |  |  | (4,086,208 | ) |  |  | (233,781 | )
Change in Fair Value of Stock and Option Awards from Prior Years that Vested in the Covered Year ($) |  |  | 2,704,234 |  |  |  | (1,714,834 | ) |  |  | (1,763,124 | ) |  |  | (376,014 | )
Less: Fair Value of Stock and Option Awards Forfeited during the Covered Year ($) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (47,728 | )
Compensation Actually Paid ($) |  |  | 9,750,582 |  |  |  | 11,961,853 |  |  |  | (1,385,547 | ) |  |  | 2,695,520 |
Equity Valuations: For performance restricted stock unit awards, the grant date fair value of awards used for SCT calculations assumes target performance. To determine the year-end fair values used in the CAP calculations, we have updated the performance expectations to reflect the latest performance estimates for unvested and outstanding awards at each fiscal year-end date. For options awards, updated market input assumptions (stock price, risk free interest rate, volatility, expected term and future dividend yield expectations) have been used to determine the fair values of outstanding awards as of the identified vesting dates and the relevant fiscal year-end dates using the Black-Scholes option pricing model. |  |  |
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 | Listed below are the financial and non-financial performance measures which in our assessment represent the most important financial performance measures we used for 2023 to link CAP to our named executive officers to company performance.
Measure |  | Nature |  | Explanation
AFFO per Share |  | Financial measure |  | Non-GAAP financial measure calculated as AFFO (Adjusted Funds From Operations) divided by the weighted number of shares outstanding, adjusted to include the dilutive effect of stock options and restricted stock units. AFFO is defined as net income (loss) plus real estate related depreciation, amortization and accretion, asset impairment and decommission costs, and adjustments for unconsolidated joint ventures, adjusted to remove the impact of non-cash straight-line leasing revenue, non-cash straight-line ground lease expense, non-cash compensation, changes in the non-cash portion of our reported tax position, non-real estate related depreciation, amortization and accretion, amortization of deferred financing costs and debt discounts, loss from extinguishment of debt, net, other (income) and expense, acquisition and new business initiatives related adjustments and expenses, non-discretionary cash capital expenditures, and adjustments for unconsolidated joint ventures. AFFO per Share is calculated on a constant currency basis utilizing exchange rates utilizing the budgeted exchange rates and exclude the impact of non-core income and expenses.
Annualized Adjusted EBITDA |  | Financial measure |  | Non-GAAP financial measure calculated as Adjusted EBITDA minus annual tower cash flow, plus four times tower cash flow for the fourth quarter. Adjusted EBITDA is defined as net income (loss) excluding the impact of interest expense, interest income, provision for or benefit from taxes, depreciation, accretion and amortization, asset impairment and decommission costs, non-cash compensation, loss from extinguishment of debt, net, other (income) and expense, acquisition and new business initiatives related adjustments and expenses, non-cash straight-line leasing revenue, and non-cash straight-line ground lease expense. Adjusted EBITDA excludes acquisition related costs which, pursuant to the adoption of new business combination accounting guidance, are expensed and included within operating expenses. Annualized Adjusted EBITDA is calculated on a constant currency basis utilizing the budgeted exchange rates and exclude the impact of non-core income and expenses.
Relative TSR |  | Financial measure |  | SBA’s TSR performance against the S&P 500 over a three-year period.
Total Shareholder Return Amount | $ 109.31 | 119.01 | 163.7 | 117.81
Peer Group Total Shareholder Return Amount | 100.41 | 100.87 | 140.99 | 105.39
Net Income (Loss) | $ 501,812,000 | $ 461,429,000 | $ 237,624,000 | $ 24,104,000
Company Selected Measure Amount | 13.08 | 12.25 | 10.74 | 9.43
PEO Name | Jeffrey A |  |  |
Measure:: 1 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | AFFO per Share |  |  |
Non-GAAP Measure Description | Non-GAAP financial measure calculated as AFFO (Adjusted Funds From Operations) divided by the weighted number of shares outstanding, adjusted to include the dilutive effect of stock options and restricted stock units. AFFO is defined as net income (loss) plus real estate related depreciation, amortization and accretion, asset impairment and decommission costs, and adjustments for unconsolidated joint ventures, adjusted to remove the impact of non-cash straight-line leasing revenue, non-cash straight-line ground lease expense, non-cash compensation, changes in the non-cash portion of our reported tax position, non-real estate related depreciation, amortization and accretion, amortization of deferred financing costs and debt discounts, loss from extinguishment of debt, net, other (income) and expense, acquisition and new business initiatives related adjustments and expenses, non-discretionary cash capital expenditures, and adjustments for unconsolidated joint ventures. AFFO per Share is calculated on a constant currency basis utilizing exchange rates utilizing the budgeted exchange rates and exclude the impact of non-core income and expenses. |  |  |
Measure:: 2 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Annualized Adjusted EBITDA |  |  |
Measure:: 3 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Relative TSR |  |  |
PEO | Stock And Option Award Values Reported In SCT For The Covered Year On Grant Date [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | $ (8,148,621) | $ (9,901,690) | $ (7,172,549) | $ (10,198,671)
PEO | Fair Value For Stock And Option Awards Granted In The Covered Year At Year End [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 7,606,781 | 7,855,626 | 13,925,505 | 9,276,084
PEO | Change In Fair Value Of Outstanding Unvested Stock And Option Awards From Prior Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (1,005,888) | (11,218,937) | 20,039,610 | 6,726,551
PEO | Change In Fair Value Of Stock And Option Awards From Prior Years That Vested In The Covered Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (1,656,336) | (4,864,514) | (4,763,952) | 7,531,487
PEO | Fair Value Of Stock And Option Awards Forfeited During The Covered Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (205,355) |  |  |
Non-PEO NEO | Stock And Option Award Values Reported In SCT For The Covered Year On Grant Date [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (2,283,870) | (3,598,186) | (2,585,499) | (3,734,188)
Non-PEO NEO | Fair Value For Stock And Option Awards Granted In The Covered Year At Year End [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 2,132,004 | 2,854,664 | 5,019,747 | 3,396,388
Non-PEO NEO | Change In Fair Value Of Outstanding Unvested Stock And Option Awards From Prior Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (233,781) | (4,086,208) | 7,293,395 | 2,427,861
Non-PEO NEO | Change In Fair Value Of Stock And Option Awards From Prior Years That Vested In The Covered Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (376,014) | $ (1,763,124) | $ (1,714,834) | $ 2,704,234
Non-PEO NEO | Fair Value Of Stock And Option Awards Forfeited During The Covered Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | $ (47,728) |  |  |

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