Long-term Debt	3 Months Ended
Mar. 31, 2015
Long-term Debt
Long-term Debt	(4)Long‑Term Debt (a)Predecessor Credit Facility Prior to the IPO on November 10, 2014, long-term debt represented amounts outstanding under a credit facility agreement between Midstream Operating, then a wholly owned subsidiary of Antero and now a wholly owned subsidiary of the Partnership, and the lenders under Antero’s credit facility that were incurred for the acquisition and construction of the Predecessor’s gathering and compression assets (the “predecessor credit facility”). Interest expense during the three months ended March 31, 2014 includes interest and commitment fees incurred under the predecessor credit facility. On November 10, 2014, in connection with the completion of the IPO, the outstanding balance of the predecessor credit facility was repaid out of the proceeds of the IPO, and this facility was assumed by Antero. (b)Revolving Credit Facility On November 10, 2014, in connection with the closing of the IPO, the Partnership entered into a revolving credit facility with a syndicate of bank lenders (the “revolving credit facility”). The revolving credit facility provides for lender commitments of $1.0 billion and a letter of credit sublimit of $150 million. The revolving credit facility will mature on November 10, 2019. The revolving credit facility is ratably secured by mortgages on substantially all of our properties, including the properties of our restricted subsidiaries, and guarantees from our restricted subsidiaries. The revolving credit facility contains certain covenants including restrictions on indebtedness and distributions, and requirements with respect to leverage and interest coverage ratios. The Partnership was in compliance with all of the financial covenants under the revolving credit facility as of December 31, 2014 and March 31, 2015. Principal amounts borrowed are payable on the maturity date with such borrowings bearing interest that is payable quarterly or, in the case of Eurodollar Rate Loans, at the end of the applicable interest period if shorter than three months. Interest is payable at a variable rate based on LIBOR or the base rate, determined by election at the time of borrowing. Commitment fees on the unused portion of the revolving credit facility are due quarterly at rates ranging from 0.25% to 0.375% of the unused facility based on utilization. At December 31, 2014 and March 31, 2015, we had no borrowings and no letters of credit outstanding under the revolving credit facility.

(4)Long‑Term Debt

(a)Predecessor Credit Facility

Prior to the IPO on November 10, 2014, long-term debt represented amounts outstanding under a credit facility agreement between Midstream Operating, then a wholly owned subsidiary of Antero and now a wholly owned subsidiary of the Partnership, and the lenders under Antero’s credit facility that were incurred for the acquisition and construction of the Predecessor’s gathering and compression assets (the “predecessor credit facility”). Interest expense during the three months ended March 31, 2014 includes interest and commitment fees incurred under the predecessor credit facility. On November 10, 2014, in connection with the completion of the IPO, the outstanding balance of the predecessor credit facility was repaid out of the proceeds of the IPO, and this facility was assumed by Antero.

(b)Revolving Credit Facility

On November 10, 2014, in connection with the closing of the IPO, the Partnership entered into a revolving credit facility with a syndicate of bank lenders (the “revolving credit facility”). The revolving credit facility provides for lender commitments of $1.0 billion and a letter of credit sublimit of $150 million. The revolving credit facility will mature on November 10, 2019.

The revolving credit facility is ratably secured by mortgages on substantially all of our properties, including the properties of our restricted subsidiaries, and guarantees from our restricted subsidiaries. The revolving credit facility contains certain covenants including restrictions on indebtedness and distributions, and requirements with respect to leverage and interest coverage ratios. The Partnership was in compliance with all of the financial covenants under the revolving credit facility as of December 31, 2014 and March 31, 2015.

Principal amounts borrowed are payable on the maturity date with such borrowings bearing interest that is payable quarterly or, in the case of Eurodollar Rate Loans, at the end of the applicable interest period if shorter than three months. Interest is payable at a variable rate based on LIBOR or the base rate, determined by election at the time of borrowing. Commitment fees on the unused portion of the revolving credit facility are due quarterly at rates ranging from 0.25% to 0.375% of the unused facility based on utilization.

At December 31, 2014 and March 31, 2015, we had no borrowings and no letters of credit outstanding under the revolving credit facility.