Aggregate Consideration Paid or Issued to Complete the BORCO Acquisition (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Jan. 18, 2011 FRC Founders Corporation Bahamas Oil Refining Company International Limited	Feb. 16, 2011 Vopak Bahamas B.V. Bahamas Oil Refining Company International Limited
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Units issued, aggregate consideration amount		$ 400.0	$ 100.0
Units issued, fair value		407.4	96.1
Held in escrow, related to Bahamian transfer taxes payable	79.3
Employee bonuses	23.2
Certain fees and expenses	$ 9.5