Subsequent Events - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended
	Mar. 26, 2013	Feb. 28, 2011	Feb. 27, 2014 Subsequent Event
Subsequent Event [Line Items]
Public offering, common units sold	1,610,000	3,756,155	2,300,000
Public offering, price per unit	$ 25.35	$ 29.25	$ 24.45
Public offering, net proceeds	$ 38.4	$ 105.6	$ 53.1