Vicki Villacrez
Analyst · Sergey Dluzhevskiy from GAMCO Investors
Okay. Thank you, Doug, and good morning, everyone.
I am pleased with our financial results for the second quarter and through the first half of the year, and we are tracking to our guidance expectations. We continue to see strong broadband growth that has accelerated since the start of the pandemic. We grew residential broadband revenues 16% in total in the quarter, driving total residential revenue growth of 10%. Overall, we grew our top line 5%, while planned investment spending on new market launches caused our adjusted EBITDA to be lower than prior year. Also notable during the quarter was strong average residential revenue per connection growth of 7% on price increases and product mix as customers take higher speeds.
We continue to experience strong tailwinds, which are driving increased broadband adoption. For example, work-at-home environment continue, bipartisan support for broadband is driving more federal and state opportunities and population migration in our most attractive markets is driving strong household growth. During the quarter, we grew our total footprint 6%, which increased strong organic household growth across our market.
Turning to the Slide 17. We remain committed to the strategic priorities we have been focused on for several years. As previously discussed, our primary objective is to generate growth by investing in our high-speed broadband services. We have a multifaceted approach in this growth that includes leveraging existing networks and constructing greenfield fiber in targeted locations.
We are very pleased that where we've invested in fiber in our incumbent market, we have achieved superior market share. And in our expansion markets, we are seeing strong customer preregistration. In addition, we continue to drive faster speeds in our more rural incumbent markets by building to meet our A-CAM obligations and utilizing state broadband grants.
On Slide 18, total residential connections increased 2% due to residential broadband growth in new and existing markets, partially offset by a decrease in voice and video connections. Total telecom broadband residential connections grew 7% in the quarter as we continue to fortify our networks with fiber and expand into new markets.
We are on track in our network construction under the A-CAM program, also helping to drive growth in our incumbent markets. Overall, higher value product mix and price increases drove a 7% increase in average residential revenue per connection.
On Slide 19, you can see the broadband connection growth across all markets. Our focus on broadband connection growth and fast reliable service has generated a 16% increase in total residential broadband revenue. We are offering up to 1 gig broadband speeds to 56% of our total footprint, including both our fiber and DOCSIS 3.1 market. The 1 gig product is an important tool that allows us to defend markets and to win customers in new markets. In areas where we offer 1 gig service, we are now seeing 21% of our new customers taking this superior product.
Turning to Slide 20. We have augmented our success, growing broadband with our TDS TV offering. Our next-generation video platform enhances the customer viewing experience and [ ends up bundle ] the products, help us to increase our broadband market share and reduce churn.
Video. Residential video connections were nearly flat. Wireline growth of 6%, driven by our expansion markets, nearly offset losses in the cable market. Video continues to remain important to our customers. For example, we are experiencing a 40% video attachment rate to every broadband connection in our wireline markets where we offer IPTV services, and that's across half our wireline footprint -- nearly half our wireline footprint. Our strategy is to increase video connections through the offering of our cloud-based TDS TV+ product. The rollout of this product currently covers 60% of our total operations, including our cable markets.
Moving to Slide 21. We continue to be very bullish on our fiber strategy and how it will transform TDS Telecom in a very meaningful way over the next several years. Given the attractiveness of this opportunity and the heightened level of participation by other overbuilders, our sense of urgency has increased. We, therefore, are upsizing the number of expansion markets we expect to build over the next several years as well as increasing our fiber builds within our existing footprint.
For competitive reasons, we are not specifically naming the markets or the number of service addresses yet, and any additional spending this year is well within our guidance. We plan to announce these additional markets after we sign construction agreements and launch our premarketing and sales efforts publicly. Fiber is the most economical, long-term solution to deliver the best broadband experience. We continue to refine our market selection criteria and are highly confident in this process.
Now let's turn to Slide 22, which shows the progress we are making this year on our multiyear fiber footprint expansion, which includes fiber into incumbent markets and also expansion into new markets. As a result of this strategy, 39% of our wireline service addresses are now served by fiber. This is up from 33% a year ago. This is driving revenue growth while also expanding the total wireline footprint, 8% to 873,000 service addresses.
Moving to Slide 23. We have highlighted the total service addresses for the clusters that are in construction, and we are actively marketing. We recently announced our expansion of fiber into Spokane Valley, Washington, adding 33,000 service addresses to our plans in the Spokane cluster. In total, we completed 338,000 fiber service addresses through the second quarter and are working to build out the footprint in these announced markets to 657,000 service addresses by 2024.
Performance of our launched fiber markets continues to meet or exceed our business cases. Year-to-date, we completed construction of 31,000 fiber addresses, adding 18,000 service addresses in the quarter. This progress is slower than planned and is putting pressure on service address delivery on the back half of the year.
The delays we are seeing in construction could impact our ability to deliver our goal of 150,000 service addresses by the end of the year, but we are confident that we'll still complete a substantial portion of our plan. We also continue to proactively manage construction and customer equipment inventory demands where we are seeing lengthening lead times with our suppliers. We will continue to update you on our progress throughout the year.
On Slide 24, total revenues increased 5% year-over-year to $252 million, largely driven by the strong growth in residential revenue which increased 10% in total. The chart includes residential revenue mix, which highlights the increasing contribution of our expansion markets.
Incumbent wireline markets also showed impressive residential growth of 7% due to increases in broadband connections as well as increases from within the broadband product mix, partially offset by a 4% decrease in residential voice connections.
Cable residential revenues grew 10%, also due to increases in broadband connections as well as product mix. Commercial revenues, which continue to be impacted by CLEC declines, decreased 4% to $46 million in the quarter. And wholesale revenues decreased 3% to $45 million due primarily to reductions in special access in the incumbent wireline market.
So let me sum up the combined financial results for the quarter. As shown on Slide 25, total revenues increased 5% from the prior year as growth from our fiber expansion and increases in broadband subscribers exceeded the declines we experienced in our legacy business. Cash expenses increased 10% due to both supporting our current growth as well as spending related to future expansion into new markets, which is not yet reflected in our revenue.
Future market costs include direct costs such as sales, marketing, real estate and technicians in addition to shared service costs necessary to support new market growth. As a result, adjusted EBITDA decreased 7% to $78 million as expected. Capital expenditures increased 33% from last year to $99 million as planned. We continue to increase our investment in fiber deployments and success-based spending for new customer installs.
On Slide 26, we've provided our 2021 guidance, which is unchanged from the guidance we shared at the beginning of the year. We expect expenses and capital expenditures to ramp up in the second half of the year as we continue to execute on our fiber expansion strategy, and we expect to end the year within the guidance range.
I want to express my gratitude to all associates for their dedication to the success of TDS Telecom. Our positive quarterly results are a product of your hard work. Thank you.
And with that, I'd like to forward -- I look forward to updating you in the third quarter. And now I'll turn the call back over to Jane.