Long-Term Incentive Plan (Details) (USD $)	0 Months Ended	12 Months Ended	56 Months Ended				12 Months Ended			12 Months Ended
	Jun. 27, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Jun. 22, 2012	Dec. 31, 2013 Phantom Unit Awards	Dec. 31, 2012 Previously Granted Phantom Unit Awards	Dec. 31, 2011 Previously Granted Phantom Unit Awards	Dec. 31, 2013 Previously Granted Phantom Unit Awards	Dec. 31, 2013 All employees except one employee July 1, 2017	Dec. 31, 2013 All employees except one employee July 1, 2018	Dec. 31, 2013 All employees except one employee July 1, 2019	Dec. 31, 2013 One employee December 31, 2014	Dec. 31, 2013 One employee December 31, 2015	Dec. 31, 2013 One employee December 31, 2016	Dec. 31, 2013 Non-employee directors December 31, 2014	Dec. 31, 2013 Non-employee directors December 31, 2015	Dec. 31, 2013 Non-employee directors December 31, 2016
Long-Term Incentive Plan
Number of common units initially authorized for issuance under LTIP (in shares)		564,242	564,242
Number of common units available for issuance					4,300,000
Long-Term Incentive Plan
Phantom units granted (in shares)	498,112	498,112
Vesting rights percentage of phantom units										33.33%			33.33%			33.33%
Cumulative vesting rights percentage on the second vesting of phantom units											66.67%			66.67%			66.67%
Cumulative vesting rights percentage on the third vesting of phantom units												100.00%			100.00%			100.00%
Compensation expenses for phantom unit awards		$ 1,700,000					$ 100,000	$ 400,000
Compensation cost related to the non-vested awards not yet recognized						17,800,000			0
Number of Non-vested Units
Outstanding non-vested units at the beginning of the period (in shares)		138,889
Granted (in shares)	498,112	498,112
Vested (in shares)		(138,889)
Outstanding non-vested units at the end of the period (in shares)		498,112	498,112
Weighted Average Grant Date Fair Value
Outstanding non-vested units at the beginning of the period (in dollars per share)		$ 13.01
Granted (in dollars per share)		$ 39.29
Vested (in dollars per share)		$ 13.01
Outstanding non-vested units at the end of the period (in dollars per share)		$ 39.29	$ 39.29
Repurchase Program
Aggregate common units authorized to be acquired (in shares)		742,427	742,427
Common units repurchased by General Partner (in shares)			495,414
Common units repurchased by General Partner		$ 4,600,000	$ 12,200,000
Repurchased units not deemed outstanding		169,816	169,816	119,915