Debt, Revolving Credit Facility (Details) - USD ($)			3 Months Ended
	Jul. 01, 2015	Mar. 02, 2015	Mar. 31, 2016	Mar. 31, 2015	[1]	Dec. 31, 2015
Revolving Credit Facility (Textual)
Borrowings under the Revolver			$ 0	$ 200,000,000
Line of Credit [Member] | Revolving Credit Facility [Member]
Revolving Credit Facility (Textual)
Line of credit facility, maximum borrowing capacity			$ 750,000,000
Line of credit facility, expiration date			Nov. 20, 2020
Borrowings under the Revolver		$ 200,000,000
Line of credit facility, interest rate, at period end			1.75%
Repayment on the Revolver	$ 25,000,000
Line of credit facility, amount outstanding			$ 175,000,000			$ 175,000,000
Line of Credit [Member] | Letter of Credit [Member]
Revolving Credit Facility (Textual)
Line of credit facility, maximum borrowing capacity			100,000,000
Line of credit facility, amount outstanding			$ 0			$ 0

[1] Financial information has been retrospectively adjusted for the acquisition of the Corpus Christi Terminal Services Business. See Notes 1 and 3.