Thanks, Rene. I'd like to add my welcome and thank you for joining our call today. Let's start with a review of the consolidated results.
As Rene mentioned, adjusted EBITDA for the quarter was $116.2 million compared to our previous guidance of $113 million, and $107.3 million for the same period last year. The increase was primarily the result of higher logistics and marketing operating margin and higher commodity hedge settlements, partially offset by lower operating margins in the Gathering and Processing division.
Overall gross margin increased 3% for the third quarter compared to last year. I will review the drivers of this performance in our segment review.
Gross maintenance capital expenditures were $16.2 million in the third quarter of 2012 compared to $24.7 million in 2011. Adjusting for the non-controlling interest portion of maintenance capital expenditures and certain reimbursements from TRC to the Partnership, net maintenance capital expenditures were $12.4 million in the third quarter of 2012 compared to $21.9 million in 2011.
Turning to the segment level, I'll summarize the third quarter's performance on a year-over-year basis. We'll start with our Gathering and Processing segment. Field Gathering and Processing operating margin decreased by approximately 25% compared to last year, driven by lower natural gas and NGL prices, partially offset by increased throughput. These segment results do not include the impact of our hedging program.
Third quarter 2012 plant and natural gas inlet for the Field Gathering and Processing segment was 686 million cubic feet per day, a 9% increase compared to the same period in 2011.
3 of our 4 our Field Gathering and Processing business units were significantly up in volume. North Texas, SAOU and Sand Hills natural gas inlet volumes increased by approximately 17%, 10% and 11% respectively, with a slight decrease in natural gas inlet volumes at Versado. For the segment, natural gas prices decreased by 36%, while NGL prices decreased 39% and condensate prices increased 1%.
Turning now to the Coastal Gathering and Processing segment, operating margin decreased 55% in the third quarter compared to last year. The decrease was primarily driven by lower commodity prices and Hurricane Isaac's impact, partially offset by an increase in richer volumes at LOU and the July purchase of the Big Lake plant, now part of the LOU business unit.
Following Hurricane Isaac, the joint venture owners of Yscloskey, which is an older lower recovery lean oil plant, elected not to repair and restart the plant. The plant contributed less than 1% to the Partnership's operating margin for the first 9 months of 2012, and is not material to the results of our Coastal Gathering and Processing segment. It was only marginally profitable prior to the hurricane and the rebuild, repair costs were not economically justified.
Next, I'll provide an overview of the 2 segments in the downstream business, starting with the Logistics Asset segment. Third quarter operating margin increased 68% compared to the third quarter 2011, an impressive increase that reflects, among other things, both our growth CapEx and our increased export activity. Growth investments include the Sound Terminal acquisition in October of 2011, and the startup of our benzene treating and depentanizer operations at Mont Belvieu in the first quarter of 2012.
Export activity at our Galena Park Marine terminal on the Houston ship channel increased again this quarter, with LPG export volumes currently running over 1 million barrels per month, loaded on small-and-medium sized vessels. While operating margin for the Logistic segment was higher versus the previous quarter, you might note slightly lower fractionation volumes versus last quarter. Both the third quarter and the second quarters reflect us being essentially full at Cedar Bayou and moving what we can to our Lake Charles frac or LCF as we call it.
Prior to the third quarter, receipt volumes at the fractionators were accounted without regard to the source of those volumes. Effective in the third quarter and going forward, volumes received at CBF, but fractionated at LCF, are only reflected at LCF.
In the Marketing and Distribution segment, operating margin for the segment increased 29% over the third quarter 2011, due primarily to increased LPG export activity and higher export margins.
With that, let's now move briefly to a capital -- to discuss capital structure and liquidity. At September 30, we had $280 million of outstanding borrowings under the Partnership's senior secured revolving credit facility. With outstanding letters of credit of $47.4 million, revolver availability was about $773 million at quarter-end.
Total liquidity, including approximately $89 million of cash on hand, was approximately $861 million, leaving us with ample flexibility to pursue organic growth and acquisition opportunities. Total funded debt on September 30 was approximately $1.7 billion or about 52% of total capitalization, and the Partnership's consolidated leverage ratio at quarter-end was approximately 3.1x, at the low end of our target range of 3x to 4x.
On October 25, we closed on a private offering of $400 million, 5.25% note due May 2023, issued at 99.5% of par value, resulting in $393.5 million of net proceeds. We used a portion of these proceeds to call in the 8.25% notes.
In October, we also refinanced the Partnership's credit facility, increasing the facility size from $1.1 billion to $1.2 billion, extending the maturity 5 years and lowering pricing.
Next, I'd like to make a few comments about our hedging and our capital spending programs for the year. Relative to the Partnership's expected equity volumes from the Field Gathering and Processing segment, we estimate we have hedged approximately 55% of 2012 natural gas and 75% of 2012 combined NGL and condensate. For 2013, we have hedged approximately 45% to 55% of expected 2012 equity volumes for natural gas, NGLs and condensate. And a similar hedging approach is also in the context of significantly increasing levels of fee-based margin.
Moving on to capital spending. We estimate approximately $680 million of gross capital expenditures in 2012, with approximately $600 million comprising growth capital expenditures. We expect maintenance CapEx net to our interest to be approximately $60 million.
Next, I will make a few brief remarks about the results of Targa Resources Corp. On October 11, Targa Resources Corp. declared a third quarter cash dividend of $0.4225 per common share or $1.69 per common share on an annualized basis, representing an approximately 37% increase over the annualized rate paid with respect to the third quarter of 2011.
TRC standalone distributable cash flow for the quarter of $21.9 million resulted in dividend coverage of 1.2x or $17.9 million in total declared dividends for the quarter. TRC stand-alone G&A expenses in the third quarter were $2.2 million.
In October, we also refinanced the credit facility at TRC, increasing the facility size to $150 million from $75 million. We paid the remaining $88.3 million of outstanding borrowings under the Hold Co. using $75 million under the new revolver and cash on-hand, leaving $75 million undrawn, under the new revolving credit facility.
Before handing the call back to Rene, I'd like to remind investors that new guidance was provided in the October 17 press release and in our October 18 Investor Presentation. The guidance is summarized on Page 4 of that presentation.
We pointed to strong growth in 2013, especially in the back half of the year when many of our growth projects come online. This positions us for strong EBITDA growth in 2014 and beyond. Given our outlook for growth, we pointed to 10% to 12% distribution growth in 2013 compared to 2012 for Targa Resources Partners, which would result in an estimated dividend growth of approximately 25% to 30%-plus for Targa Resources Corp.
That concludes my review and I'll turn the call back over to Rene.