Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Selected Quarterly Financial Information [Abstract]
Total revenues	$ 99,363	$ 128,924	$ 126,465	$ 102,889	$ 124,837	$ 95,892	$ 32,108	$ 29,810	$ 457,641	$ 282,647	$ 121,301
Net income	$ (151,220)	$ 1,619	$ 1,163	$ 1,808	$ 4,361	$ (2,601)	$ 4,879	$ 4,619	$ (146,630)	$ 11,258	$ 17,567
Net income per common unit	$ (4.47)	$ 0.04	$ 0.02	$ 0.04	$ 0.12	$ (0.10)	$ 0.31	$ 0.29	$ (4.36)	$ 0.47	$ 1.11
Net income per diluted common unit	$ (4.47)	$ 0.04	$ 0.02	$ 0.04	$ 0.12	$ (0.10)	$ 0.30	$ 0.29	$ (4.36)	$ 0.47	$ 1.10