Christopher William Marinac
Janney Montgomery Scott LLC, Research Division
Just a quick question about sort of hiring in Atlanta both before this merger announcement and sort of what you envision going forward. And I guess I'm curious, kind of just to compare and contrast the sort of ease and low risk of buying ACBI versus hiring more people in Atlanta, John, if you could just expand on that?
John C. Corbett
CEO & Director
Yes. I don't think it's an either or, Chris, I think it's both. Doug's got a great, great team of lenders that have been with him a long time. They're very productive in their roles. And we have been actively recruiting and hiring as well. I think we did a press release a week or 2 ago with another slate. I think it was 7, 8, 9 commercial bankers around the Southeast. So I don't think it's an either or, and I think it's just going to enhance our ability to recruit. Think about the kind of bankers we're recruiting in Atlanta. Now they're going to see a $5 billion balance sheet with capital market solutions, Doug's corporate banking background and leadership. I think this is going to become even more attractive place for bankers to come, to spend their careers with us. Doug, anything you want to add there?
Douglas L. Williams
President, CEO & Director, Atlantic Capital Bancshares, Inc.
Chris, as you know, we, at Atlantic Capital, we have pretty ambitious plans to hire new bankers this year. And I think this only enhances our opportunity to do that. Also, as we join with the SouthState team here, we'll have a bigger team of bankers on the street, and I think we can continue to add to that. So I think we will be very active in hiring new bankers here in Atlanta and elsewhere across the company.
Christopher William Marinac
Janney Montgomery Scott LLC, Research Division
Sounds good. Thank you both. Best wishes for success.
Operator
And our next question today comes from Catherine Mealor with KBW. Please go ahead.
Catherine Fitzhugh Summerson Mealor
Keefe, Bruyette, & Woods, Inc., Research Division
John, it was great to see growth pick up a little bit this quarter, and it seems like origination volumes are also picking up and then, of course, ACBI, I think, will help the growth rate. Any kind of thoughts on, in the near-term pickup in bottom line growth? And if near term, do you think you'll be able to deploy some of the $6 billion in excess liquidity into loans that will be more prominent in the back half of this year?
John C. Corbett
CEO & Director
Yes, Catherine, if you think back to a quarter or 2 kind of where we guided was that we thought we'd be at about mid-single-digit growth in the back half of the year. And really, on the commercial loan side, we're there now. Our commercial loans this quarter grew a little better than 5%. Mortgage continues to be about flat. So that pulls up 5% commercial growth, loan growth rate down a little bit. The pipelines continue to grow. The production is up 25% in the second quarter. So I feel good. We had one sizable payoff in July, but it looks like we're growing through that. The markets are strong. So I think that, that original guidance still holds.
Catherine Fitzhugh Summerson Mealor
Keefe, Bruyette, & Woods, Inc., Research Division
Great. Okay. And then on -- how are you thinking about securities investments in the size and kind of the growth rate of the securities book in this rate environment?
Stephen D. Young
Senior EVP & CSO
Catherine, it's Steve. Let me just talk quickly about the deployment of the $6 billion of excess cash. I think that's an important key start story. Just like we said last quarter, we have, I'll call it, $5.5 billion of excess liquidity. So as we kind of think about the next 18 months to get us to the end of 2022, we're thinking about approximately $2 billion of that loan growth, $1.5 billion of security growth over that period. And then that gives us $2 billion of dry powder for either loan growth, security growth or if there's some deposit shrinkage. So I think as we think about the future, we don't -- we like to average in over a period of time, but we really like our position with all the excess liquidity. We have a slide, I think you've seen it before, I think we talked about it last quarter, but on Page 15, which refers to both our security and cash position, and then Page 16 shows how we compare to our peers. And we're underinvested relative to securities assets to our peers by about 5%, that's $2.5 billion. All we're suggesting is that we do $1.5 billion. But if the interest rate environment got better, certainly, we would go harder. So hopefully, that's helpful.