Partnership Capital and Distributions - Additional Information (Detail) (USD $)	0 Months Ended	1 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended		0 Months Ended	3 Months Ended
	Aug. 15, 2013	Apr. 02, 2013	Mar. 31, 2014	Dec. 31, 2012 Convertible Class B Units	Mar. 31, 2014 Maximum	Mar. 31, 2014 Cash Distributions for Limited and General Partner	Aug. 15, 2013 Subordinated Units	Mar. 31, 2014 Subordinated Class C Units
Limited Partners Capital Account [Line Items]
Cash distribution period						45 days
Cash distribution paid						$ 122,100,000
Cash distribution per unit						$ 0.555
Cash distribution declaration date						Apr. 24, 2014
General partnership interest and distribution right		2.00%	2.00%
Maximum percentage of cash that can be distributed for general partner					50.00%
Subordinated units converted into common units	69,076,122
Units converted into common units, basis description							one-for-one	one-for-one
Beneficial conversion feature				$ 58,300,000