Earnings per Unit (Details) (USD $)	3 Months Ended		9 Months Ended				3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Oct. 09, 2013	Sep. 30, 2014 Common Units [Member]	Sep. 30, 2014 Common Units [Member]	Sep. 30, 2014 Subordinated Units [Member]	Sep. 30, 2014 Subordinated Units [Member]	Oct. 15, 2014 Subsequent Event [Member] Common Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited Partners' Capital Account, Units Outstanding						0
Weighted Average Number Diluted Shares Outstanding Adjustment										0
Limited Partners' Capital Account, Units Issued											1,160,092
Incentive Distribution, Distribution			$ 0
Earnings Per Share [Abstract]
Net income (loss)	12,265,000	(25,406,000)		34,173,000	(65,040,000)
Distribution Made to Limited Partner, Cash Distribution Declared							(7,014,000)	(19,291,000)	(7,014,000)	(19,291,000)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	(1,763,000)			(4,409,000)			(882,000)	(2,205,000)	(881,000)	(2,204,000)
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic							$ 6,132,000	$ 17,086,000	$ 6,133,000	$ 17,087,000
Weighted Average Number of Shares Outstanding, Basic							22,811,000	22,811,000
Weighted Average Number of Shares Outstanding, Diluted							22,883,000	22,853,000
Weighted Average Number of Shares Outstanding, Basic and Diluted									22,811,000	22,811,000
Earnings Per Share, Basic							$ 0.27	$ 0.75
Earnings Per Share, Diluted							$ 0.27	$ 0.75
Earnings Per Share, Basic and Diluted									$ 0.27	$ 0.75