Margins in the quarter expanded year-over-year despite an 80 basis point increase in fuel expense as a percentage of revenues. This resulted in year-over-year percentage growth in EBITDA and earnings per share once again surpassing revenue growth.
On a 16.8% increase in revenue, adjusted operating income before depreciation and amortization grew 17.5%, and adjusted EPS grew 20% compared to Q3 2010. Free cash flow through the first nine months of 2011 was 19.5% of revenue, up 26% over the prior year period on a dollar basis.
We’ve signed or completed acquisitions totaling over $200 million of annualized revenues and returned about $110 million to shareholders through stock repurchases and dividends so far this year. And as also announced yesterday, our Board of Directors authorized a 20% increase in the quarterly cash dividend as a result of our strong operating performance and capital position.
Looking at 2012, the combination of about $80 million of acquisition rollover growth and expected core price at least equal to what we achieved in 2011, should position us well in the upcoming year. Before we get into much more details, let me turn the call over to Worthing for our forward-looking disclaimer, as well as other housekeeping items.Worthing Jackman Great. Thank you Ron and good morning. We must inform everyone listening that certain matters discussed in this conference call are forward-looking statements intended to qualify for the Safe Harbors from liability established by the Private Securities Litigation Reform Act of 1995, including statements relating to expected volume and pricing trends, including recycled commodity prices, contribution from closed acquisitions, signed or potential acquisition and privatization activities, share repurchases, dividends, available borrowing capacity and anticipated capital expenditures, as well as our fourth quarter and full year 2011 outlook for financial results. Such forward-looking statements are subject to various risks and uncertainties, which could cause actual results to differ materially from those currently anticipated. These risks and uncertainties are set forth in the Company's periodic filings with the Securities and Exchange Commission.