Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				3 Months Ended							3 Months Ended
	Mar. 31, 2014	Mar. 31, 2014 First Monthly Distribution [Member]	Dec. 31, 2013 First Monthly Distribution [Member]	Apr. 30, 2014 First Monthly Distribution [Member]	Mar. 31, 2014 Second Monthly Distribution [Member]	Mar. 31, 2014 Third Monthly Distribution [Member]	Mar. 31, 2014 Subsequent Event [Member]	May 06, 2014 Subsequent Event [Member]	Apr. 24, 2014 Subsequent Event [Member]	Apr. 21, 2014 Subsequent Event [Member]	Apr. 20, 2014 Subsequent Event [Member]	Mar. 31, 2014 Subsequent Event [Member] First Monthly Distribution [Member]	Mar. 31, 2014 Subsequent Event [Member] Second Monthly Distribution [Member]	May 31, 2014 Subsequent Event [Member] Second Monthly Distribution [Member]	Mar. 31, 2014 Senior Secured Revolving Credit Facility [Member]	Apr. 21, 2014 Senior Secured Revolving Credit Facility [Member] Subsequent Event [Member]	Apr. 20, 2014 Senior Secured Revolving Credit Facility [Member] Subsequent Event [Member]
Subsequent Event [Line Items]
Subsequent event date							Apr. 21, 2014
Credit Agreement, maximum borrowing capacity								$ 900.0		$ 900.0	$ 950.0				$ 950.0	$ 900.0	$ 950.0
Cash distribution per unit				$ 0.1625					$ 0.1625					$ 0.1625
Date distribution was declared		Mar. 28, 2014	Dec. 01, 2013		Jan. 01, 2014	Feb. 01, 2014	Apr. 24, 2014					Apr. 01, 2014	Apr. 24, 2014
Date distribution will be paid		Apr. 30, 2014	Jan. 01, 2014		Feb. 01, 2014	Mar. 01, 2014	May 14, 2014					May 01, 2014	May 31, 2014
Date unitholders of record		Apr. 09, 2014	Jan. 13, 2014		Feb. 10, 2014	Mar. 10, 2014	May 08, 2014					May 08, 2014	May 08, 2014
Increase in authorization of additional units under Long Term Incentive Plan	3