This is Ralph, again. Let me just make a couple of comments in conclusion. First, while our revenues are up 10% in Investment Banking year-to-date, and as Roger said, we're proud of that result, we expect our full year's revenues will exceed last year's by a higher percentage. This is basic math. As the fourth quarter last year was a relatively weak quarter, which should be easily exceeded this year, assuming that our current backlog is realized as expected.
In light of this, we expect our full year operating margins for 2012 to be closer to our full-year operating margins in 2011 than they were for the first 3 quarters. And the first -- the margins last year, to remind everyone, were 20%. As we continue -- and this occurs, as we continue to mitigate the influence of our weak first quarter on our year-to-date margins. This is also basic math. That results from the fact that our weakest quarter this year will almost certainly be the first quarter and the fourth quarter last year was also relatively weak, and offers an easier comparison.
Second, our Advisory business is considerably more diversified than it has been historically. Year-to-date, Advisory revenues are up 10% as we discussed. But the number of clients served year-to-date is up approximately 30% to 247. The sad news about this is that we have not booked a single advisory fee larger than $20 million this year, and we do not expect to book any in the fourth quarter. So this will be the first year in the last 4 that we have had no fees in excess of $20 million.
The very good news is that our Advisory business will generate strong double-digit revenue growth this year, without the benefit of a single fee over $20 million.
Third, as we look ahead into 2013, we believe that there is a reasonable probability that we will have additional opportunities to add to our team of highly talented Senior Managing Directors, both from recruiting talent externally and from internal promotions. These additions fuel future growth and value creation in the firm. And we are organizing ourselves this fall to take advantage of this opportunity, should it materialize.
Finally, given the prospective opportunities to grow our Advisory business, we are focusing our excess cash flow on repurchasing shares and on growing our Advisory team and are, at the current time, limiting acquisition activity in the Investment Management business to small tuck-in acquisitions in our Wealth Management business.
Our share repurchase activity last quarter and the increase in our dividend reflect this strategy. In fact, in the last 12 months we have returned $104 million to shareholders through dividends and share repurchases, well in excess of our reported net income over that period. And the board's authorization to repurchase an additional 5 million shares assures the continuation of this approach.
That completes our introductory comments. We are now glad...