Gregory Sullivan
Analyst · Evan Smith of Cantor Fitzgerald
Thanks, Ben, and good morning, everyone. As Ben mentioned, we had another solid quarter from an acquisition and a leasing standpoint. Our Cash NOI for the second quarter was $17 million, which represented a 14% increase over the first quarter of 2012. This growth was driven by our strong acquisition activity. Our Core FFO in the second quarter was $8.8 million, a 23% increase over the first quarter. This large increase was a function of the revenue ramp described above.
Consistent with our past reporting, we eliminated our above/below market rent adjustments, the majority of which was created at our IPO, as well as acquisition deal costs and other nonrecurring costs to measure our Core FFO, which we believe is a more representative measure than NAREIT FFO. You can see a detailed reconciliation of these various metrics in our press release and supplemental.
Our AFFO for the quarter was $8.6 million, a 21% increase over the first quarter. In part, because of the single tenant nature of our business, our renewal leasing costs and recurring CapEx continue to be fairly modest. They were 1.7% of cash NOI in the second quarter.
Once again, we had a number of acquisitions closed towards the end of the quarter. In fact, 40% of the acquisition volume was done in the last 15 days of the quarter. As a result, the run rate metrics are even better than stated. We also had some temporary earnings dilution on a per-share basis this quarter, since the proceeds from our May equity raise were invested in acquisitions towards the end of the quarter. In spite of this dilution, our Core FFO still increased from $0.30 to $0.32.
I should also point out that these metrics of quarter-over-quarter growth are comparing sequential quarters since we don't yet have comparable prior-year periods. Because of our significant external growth, they would be much higher if compared year-over-year.
Our portfolio occupancy increased 150 basis points, from 94.2% to 95.7%, and 120 basis points on a day-weighted basis. Our same-store occupancy increased by 20 basis points when measured at quarter ends and increased by 40 basis points on a day-weighted basis. Once again, we experienced relatively stable rental renewals this quarter, with rents rolling down 2.4% on a cash basis and up 1.8% on a GAAP basis for renewed leases expiring in the second quarter.
Of the 6 renewal leases, one lease was designed to push a tenant who wanted a short-term lease to renew for 5 years. We would've had a positive cash uplift but for that one lease. Also, year-to-date, we were -- we are essentially flat on a cash basis and up 2% on a GAAP basis. In addition, we retained 95% of our tenants year-to-date.
Our balance sheet and liquidity continues to be strong. We completed a common stock offering in May for net proceeds of $103 million, which further strengthened our balance sheet. One of the goals of the offering was to increase our institutional shareholder base, and we were pleased to see 47% of the demand come from new shareholders and 83% of the offering was sold to institutions.
Our interest coverage for the quarter increased from 3.3x to 3.7x, and our debt to total assets was lowered to 41%. Our net debt-to-annualized adjusted EBITDA was 4.9x at quarter end, but that figure is somewhat overstated since, once again, most of the acquisition activity occurred late in the year -- I'm sorry, late in the quarter. As a result, it may have been a few weeks of income in the quarter for certain acquisitions, yet we counted our full debt balance on those acquisitions.
On a pro forma basis, assuming all the second quarter acquisitions were in place for the full quarter to correspond to the full debt balance, the pro forma net debt to annualized adjusted EBITDA would be in the mid-4x.
As of quarter end, we had approximately $5 million of cash and $95 million at quarter-end availability under our credit facility. This liquidity, when combined with 50% acquisition financing, gave us roughly $200 million of incremental purchasing power at quarter end. I should add that we are in discussions to increase our revolving credit facility from $100 million to $200 million and improve the pricing proceeds level and other terms.
In general, we continue to see the financing markets improved and the nature of our properties with high cash yields and limited leasing costs is appealing to the lending community. We continue to see the high positive spreads between our going in cap rates and our financing rates. As a result, we once again were able to pay a high dividend to our shareholders, which averaged approximately 7.8% in the second quarter and represented around 84% of our AFFO.
So in summary, we continue to exploit the attractive acquisition opportunities available to us. We continue to experience the high tenant retention and minimal CapEx that is inherent in our business. And we have a sound balance sheet to execute our strategy of generating income plus growth for our investors.
I will now turn it back over to Ben.