Debt	3 Months Ended
Mar. 31, 2015
Debt Disclosure [Abstract]
Debt	6. Debt Revolving Credit Facility Agreement On October 31, 2014, the Partnership entered into a $300.0 million senior unsecured revolving credit facility agreement with Shell Treasury Center (West) Inc., an affiliate of Shell, as the lender. The Revolver matures on October 31, 2019 and contains certain restrictive covenants. Loans advanced under the agreement have up to a six-month term. There were no outstanding borrowings as of March 31, 2015 and December 31, 2014. On May 12, 2015, the Partnership and Shell Treasury Center (West) Inc. amended and restated the Revolver to increase the borrowing capacity amount to $400.0 million. Loans advanced under the amended and restated Revolver have up to a one-year term. In connection with the amendment and restatement of the Revolver, the Partnership agreed to pay an issuance fee of $0.2 million. All other terms and conditions of the agreement were unchanged. Zydeco Revolving Credit Facility Agreement On August 6, 2014, Zydeco entered into a senior unsecured revolving credit facility agreement with Shell Treasury Center (West) Inc., an affiliate of Shell, as the lender. The Zydeco Revolver matures on August 6, 2019 and has a borrowing capacity of $30.0 million. Loans advanced under the agreement have up to a six-month term. There were no outstanding borrowings as of March 31, 2015 and December 31, 2014.

Debt

3 Months Ended

Mar. 31, 2015

6. Debt

Revolving Credit Facility Agreement

On October 31, 2014, the Partnership entered into a $300.0 million senior unsecured revolving credit facility agreement with Shell Treasury Center (West) Inc., an affiliate of Shell, as the lender. The Revolver matures on October 31, 2019 and contains certain restrictive covenants. Loans advanced under the agreement have up to a six-month term. There were no outstanding borrowings as of March 31, 2015 and December 31, 2014.

On May 12, 2015, the Partnership and Shell Treasury Center (West) Inc. amended and restated the Revolver to increase the borrowing capacity amount to $400.0 million. Loans advanced under the amended and restated Revolver have up to a one-year term. In connection with the amendment and restatement of the Revolver, the Partnership agreed to pay an issuance fee of $0.2 million. All other terms and conditions of the agreement were unchanged.

Zydeco Revolving Credit Facility Agreement

On August 6, 2014, Zydeco entered into a senior unsecured revolving credit facility agreement with Shell Treasury Center (West) Inc., an affiliate of Shell, as the lender. The Zydeco Revolver matures on August 6, 2019 and has a borrowing capacity of $30.0 million. Loans advanced under the agreement have up to a six-month term. There were no outstanding borrowings as of March 31, 2015 and December 31, 2014.