Debt

Our obligations under debt arrangements consisted of the following:



	September 30, 2015		December 31, 2014
Senior secured credit facility	$	1,014,100	$	550,400
7.875% senior unsecured notes (including unamortized premium of $639 in 2014)	—		350,639
6.000% senior unsecured notes	400,000		—
5.750% senior unsecured notes	350,000		350,000
5.625% senior unsecured notes	350,000		350,000
6.750% senior unsecured notes (including unamortized discount of $10,067 in 2015)	739,933		—
Total long-term debt	$	2,854,033	$	1,601,039

As of September 30, 2015, we were in compliance with the financial covenants contained in our credit agreement and senior unsecured notes indentures.

Senior Secured Credit Facility

The Enterprise acquisition meaningfully expanded our size and is expected to improve our credit metrics over the longer-term, which we believe should help accelerate an increase in our credit ratings in the future. In connection with our expanded size and improved credit outlook, we amended our senior secured credit facility (which matures on July 28, 2019) in the third quarter of 2015 to, among other things, (i) increase our committed amount to $1.5 billion, (ii) provide that, if and when we achieve specified investment grade ratings, certain restrictive covenants will cease to apply and the applicable margin for both alternate base rate and Eurodollar loans and the commitment fee on the unused committed amount will be reduced by specified amounts, (iii) immediately provide us more operational flexibility by relaxing certain covenants, including by increasing certain applicable limits and baskets, and (iv) increase the inventory financing sublimit amount, which is designed to allow us to more efficiently finance crude oil and petroleum products inventory in the normal course of our operations by allowing us to exclude the amount of inventory loans from our total outstanding indebtedness for purposes of determining our applicable interest rate, from $150 million to $200 million.

The key terms for rates under our $1.5 billion senior secured credit facility, which are dependent on our leverage ratio (as defined in the credit agreement), are as follows:

•The applicable margin varies from 1.50% to 2.50% on Eurodollar borrowings and from 0.50% to 1.50% on alternate base rate borrowings.

•Letter of credit fees range from 1.50% to 2.50%

•The commitment fee on the unused committed amount will range from 0.250% to 0.375%.

•The accordion feature is $500 million, giving us the ability to expand the size of the facility up to $2.0 billion for acquisitions or growth projects, subject to lender consent.

At September 30, 2015, we had $1.0 billion borrowed under our $1.5 billion credit facility, with $34.5 million of the borrowed amount designated as a loan under the inventory sublimit. Our credit agreement allows up to $100 million of the capacity to be used for letters of credit, of which $16.6 million was outstanding at September 30, 2015. Due to the revolving nature of loans under our credit facility, additional borrowings and periodic repayments and re-borrowings may be made until the maturity date. The total amount available for borrowings under our credit facility at September 30, 2015 was $469.3 million.

On September 17, 2015, we amended our $1.5 billion credit agreement which provides that, if and when we achieve specified investment grade ratings, certain restrictive covenants will cease to apply and the applicable margin for both alternate base rate and Eurodollar loans and the commitment fee on the unused committed amount will be reduced by specified amounts. The amendment also increases the inventory financing sublimit amount from $150 million to $200 million.

Senior Unsecured Note Issuance and Repayment

On July 23, 2015, we issued $750 million in aggregate principal amount of 6.75% senior unsecured notes due 2022. Interest payments are due on February 1 and August 1 of each year with the initial interest payment due February 1, 2016. Those notes mature on August 1, 2022. That issuance generated net proceeds of $728.6 million net of issuance discount and underwriting fees. The net proceeds were used to fund a portion of the purchase price for our Enterprise acquisition.

On May 21, 2015, we issued $400 million in aggregate principal amount of 6.0% senior unsecured notes due 2023. Interest payments are due on May 15 and November 15 of each year with the initial interest payment due November 15, 2015. Those notes mature on May 15, 2023. We used a portion of the proceeds from those notes to effectively redeem all of our outstanding $350 million, 7.875% senior unsecured notes due 2018, using a combination of public tender offer and our redemption rights relating to those notes. The aggregate principal amount of the 7.875% notes totaling $300.1 million were tendered and the remaining $49.9 million were redeemed in full. A total loss of approximately $19.2 million for the tender and redemption of notes is recorded to "Other income/(expense), net" in our Consolidated Statements of Operations.