Brendan T. Cavanagh
Executive Vice President and Chief Financial Officer at SBA Communications
Thanks, Mark. Good evening. SBA started the year off with a very strong quarter with many of the results ahead of our internal expectations and we continue to anticipate a solid performance throughout 2022. Total GAAP site leasing revenues for the first quarter were $559.4 million and cash site leasing revenues were $551.4 million. Foreign exchange rates were slightly ahead of our previously forecasted FX rate estimates for the quarter positively impacting revenues by approximately $2.3 million. They were also a tailwind on comparisons to the first quarter of 2021 positively impacting revenues by $2.3 million on a year-over-year basis. Same tower recurring cash leasing revenue growth for the first quarter, which is calculated on a constant currency basis, was 4.3% over the first quarter of 2021, including the impact of 3.1% of churn. On a gross basis, same tower growth was 7.4%.
Domestic same tower recurring cash leasing revenue growth over the first quarter of last year was 6.4% on a gross basis and 3.7% on a net basis, including 2.7% of churn. Domestic operational leasing activity or bookings representing new revenue placed under contract during the first quarter was very strong again and materially higher than the first quarter of last year. And we continue to replenish our domestic new lease and new amendment application backlog, which remains very healthy at quarter end. These backlogs support our expectations for continued strong domestic operational leasing activity throughout the rest of 2022.
During the first quarter, amendment activity represented 55% of our domestic bookings with 45% coming from new leases. The Big 4 carriers of AT&T, T-Mobile, Verizon and DISH represented 95% of total incremental domestic leasing revenue signed up during the quarter. Internationally, on a constant currency basis, same tower cash leasing revenue growth was 7% net including 4.8% of churn or 11.8% on a gross basis, international leasing activity was very good again, and we continue to see increasing customer activity levels in many of our markets. International growth continues to climb higher in part due to increased inflation -- I'm sorry, in part due to increased inflation-based escalators. In Brazil, our largest international market, we also had another solid quarter of leasing activity. Gross same tower organic growth in Brazil was 13.3% on a constant currency basis. During the first quarter, 82.1% of consolidated cash site leasing revenue was denominated in US dollars. The majority of non-US dollar denominated revenue was from Brazil with Brazil representing 12% of consolidated cash site leasing revenues during the quarter and 8.8% of cash site leasing revenue excluding revenues from pass through expenses.
Tower cash flow for the first quarter was $445.3 million. Our tower cash flow margins remain very strong with the first quarter domestic tower cash flow margin of 84.6% and an international tower cash flow margin of 68% or 90.3% excluding the impact of pass-through reimbursable expenses. International tower margins were modestly impacted by our new less mature Tanzania assets. Adjusted EBITDA in the first quarter was $423.8 million. The adjusted EBITDA margin was 69.3% in the quarter. Excluding the impact of revenues from pass-through expenses, adjusted EBITDA margin was 74.2%. Approximately 97% of our total adjusted EBITDA was attributable to our tower leasing business in the first quarter.
During the first quarter, our services business produced record results for the fourth quarter in a row with $60.3 million in revenue and $14.6 million of segment operating profit. We also continue to replenish and build even higher our services backlogs, finishing the quarter at the highest level in our company's history. Based on this backlog and the continuing high activity levels by our customers, we have raised our outlook for increased contributions from our services business throughout the balance of 2022.
AFFO in the first quarter was $324.3 million. AFFO per share was $2.96, an increase of 14.7% over the first quarter of 2021. During the first quarter, we continue to expand our portfolio acquiring 1,807 communication sites for total cash consideration of $215.4 million, which includes 1,445 sites for $176.1 million closed on January 4 in our previously disclosed acquisition from Airtel Tanzania. We also built 86 new sites in the quarter. Subsequent to quarter end, we have purchased or are under agreement to purchase 358 sites in our existing markets for an aggregate price of $127.9 million. We anticipate closing on these sites under contract by the end of the year. In addition, subsequent to quarter end, we closed on the acquisition of a standalone data center in Sao Paulo, Brazil for cash consideration of approximately $49 million. The data center currently produces approximately $8.3 million US in annual revenue and $3.5 million US in annual adjusted EBITDA. This acquisition was done in support of our continuing evaluation and efforts around the potential expansion of mobile edge computing to our tower sites.
In addition to new tower and other assets, we also continue to invest in the land under our sites. During the quarter, we spent an aggregate of $8.7 million to buy land and easements and to extend ground lease terms. At the end of the quarter, we owned or controlled for more than 20 years, the land underneath approximately 71% of our towers and the average remaining life under our ground leases including renewal options under our control is approximately 36 years.
Looking ahead now, this afternoon's earnings press release includes our updated outlook for full year 2022. We have increased our outlook for most of our key metrics from the outlook we previously provided with our prior quarter earnings release. These increases are partially due to revised expectations for better foreign currency exchange rates than previously assumed. These FX changes have contributed an increase to our revenue outlook of approximately $21 million and our adjusted EBITDA outlook of approximately $13 million. In addition, we have increased the midpoint of our outlook for site leasing revenue by $17 million on a constant currency basis. This increase is due to several factors including lower domestic churn impact during 2022 as a result of longer decommissioning cycles as compared to SBA's initial estimates, higher international CPI based escalators, higher reimbursable and miscellaneous one-time revenue items and contributions from acquisitions completed during and after the quarter, all of which was partially offset by increased churn in Panama. On April 6, Digicel Panama, one of our primary customers in Panama, announced that they intend to apply for voluntary liquidation and withdraw from the telecommunications market in Panama. While there are likely many developments and steps to take place over the coming months, we have increased our projected 2022 churn impact by approximately $6 million to account for the loss of all leasing revenue from Digicel Panama for the balance of the year.
Notwithstanding this one churn issue, as noted, there were a number of very positive developments in our business over the last 2 months that have resulted in a significant increase in our full year revenue outlook. In addition to the leasing benefits I just mentioned, we also raised the midpoint of our services revenue outlook by $27 million or over 13% due to our very strong first quarter results and the continuing strength of our backlogs. The strength of both our leasing and services business has allowed us to raise the midpoint of our full year outlook for AFFO per share by $0.24.
Our full-year 2022 outlook does not assume any further acquisitions beyond those under contract today and the outlook also does not assume any share repurchases other than those completed as of today. However, we are likely to invest in additional assets or share repurchases or both during the rest of the year. Our outlook for net cash interest expense and for AFFO did not contemplate any further financing activity in 2022. However, we will continue to look for opportunities to continue to optimize our balance sheet.
With that, I will now turn things over to Mark, who will provide an update on our liquidity position and balance sheet.