G. Cooper
Analyst · Deutsche Bank
Thanks, Kent. During my review of the fourth quarter, please note that many of the numbers I will mention are listed in a schedule of supplemental financial and operating data that was included in the press release. Also please note that in the supplemental schedule, we have begun breaking out Texas Roadhouse restaurant-only information this quarter, mainly from an average weekly sales perspective. This information excludes the result of our 3 Aspen Creek restaurants.
Some details on the quarter. Our fourth quarter and overall 2011 results came in better than we had anticipated due to better-than-expected sales, driven by traffic and slightly lower food inflation. Starting at the top of the income statement, total revenues increased 13.1% over the year-ago period, driven by operating week growth of 7% and average unit volume growth of 5.6%. For Texas Roadhouse restaurants, average unit volume growth of 5.6% was in line with our same-store sales growth of 5.6%.
With regard to same-store sales, traffic increased over 3%, while average check was up approximately 2.3%. By month, comparable sales increased 4.2%, 5.3% and 6.9% for October, November and December, respectively.
On the cost side of the P&L, restaurant margins as a percentage of sales decreased 25 basis points over the prior year.
As has been the case in recent quarters, we experienced margin pressure in cost of sales and labor, partially offset by leverage and other operating costs as a result of our strong comparable restaurant sales growth. Despite lower restaurant margins as a percentage of sales, restaurant margin dollars per store week grew 4.1% for the quarter and 2% compared to the prior year. So while we gave some margin percent back, we were able to achieve solid restaurant margin dollar growth for the year.
Now a little color on some of the specific lines for the fourth quarter of 2011 as compared to the same period last year. Cost of sales increased 90 basis points versus the prior year, driven by food inflation of approximately 4.6% for the quarter. For 2011, food inflation increased just over 3.5%.
Labor was up 18 basis points versus the prior year as the benefit of comparable restaurant sales growth was more than offset by the impact of increased payroll tax expense. This increased payroll tax expense was driven by the reclassification of the higher tax credit program incentives. This negatively impacted labor cost by 40 basis points as the credits were recorded as an offset to income tax expense in 2011 versus an offset to labor cost in 2010. It's worth noting that for the full year, labor as a percent of sales would have been close to flat excluding the impact of this reclassification.
Other operating costs were down 76 basis points during the quarter, thanks in large part to comparable restaurant sales growth of 5.6%. This enabled us to leverage several expense categories, including utilities, supplies and property taxes. Additionally, we experienced lower credit card fees because of regulatory changes that took effect in October relating to debit card interchange fees.
Looking at cost below the restaurant margins, preopening expenses continued to be higher year-over-year in conjunction with increased development. And during the quarter, we recorded $1.1 million in impairment charges. $800,000 of this amount related to writing off some goodwill on a particular restaurant in conjunction with our annual goodwill impairment testing which occurs during the fourth quarter.
With regard to G&A, we experienced a 30-basis point improvement during the quarter driven by leverage from a 13%-plus increase in revenues. Our tax rate for the year came in at 29.5%, leading to a 28.2% tax rate for the quarter. Both of these were a little lower than expected due to lower nondeductible officer compensation.
Our balance sheet remains strong as we ended the year with $74 million in cash and $62 million in debt. Once again, we generated positive free cash flow during the fourth quarter, bringing our total free cash flow for the year to $56 million. During 2011, we utilized our free cash flow along with $8 million in cash from the prior year and $10 million in additional debt borrowings to pay $17 million in dividends and repurchased $59 million worth of stock.
And as we announced, our board authorized an increase in our quarterly dividend payment, taking it to $0.09 per share from $0.08 per share last year. This represents a 12.5% increase. Additionally, our board approved a new $100 million share repurchase program. The new authorization replaces the previous repurchase program that had $40.9 million remaining at the end of 2011 fiscal year. We believe the increase in dividend payment, along with our new share repurchase program, reflects our ongoing commitment to returning capital to shareholders.
Now onto our outlook for 2012. On the sales front, 2012 is off to a solid start with comparable sales up 6.7% for the first 7 weeks compared to the prior year. While we do not specifically calculate the impact of inclement weather, it is worth mentioning that we have had milder weather this year than in the prior year.
Regarding our outlook for 2012 diluted earnings per share, we expect to generate solid double-digit revenue growth. However, we anticipate we will get back some margin percent and that a much higher tax rate resulting from the expiration of certain tax credits will negatively impact our diluted earnings per share growth by about 5%. Thus, we are expecting diluted earnings per share growth to be approximately 5% for the year.
Our 2012 expectations include the following assumptions: first, comparable restaurant sales growth of 4% to 5% with approximately 3% from pricing and 1% to 2% from traffic growth. While we're up more than that now, we believe 4% to 5% is a reasonable assumption for the year; second, we expect 25 openings for 2012 which leads to high single-digit operating week growth; third, we expect approximately 8% food inflation in 2012, primarily due to higher beef costs. We currently have 6 price arrangements in place for 65% to 70% of our overall cost of sales for 2012. And keep in mind that 20% to 30% of our overall commodity cost typically float; and finally, we expect our income tax rate to be 32.5% to 33% versus 29.5% in 2011 because of expiring credits.
As I mentioned, this significantly impacts our earnings per share growth potential in 2012. A couple of additional comments relating to 2012. On the G&A front, we expect continued leverage driven by double-digit revenue growth and we also expect to continue returning capital to shareholders through dividends and ongoing share repurchases.
With that said, let me turn the call over to our President, Scott Colosi.