Related Party Debt - Additional Information (Details) - USD ($)					9 Months Ended
	May 23, 2016	Mar. 29, 2016	Jul. 01, 2015	May 18, 2015	Sep. 30, 2016	Sep. 30, 2015	[1]	Sep. 27, 2016
Line Of Credit Facility [Line Items]
Repayments of debt					$ 410,000,000	$ 0
364 Day Revolver | Poseidon
Line Of Credit Facility [Line Items]
Line of credit facility, expiration period					364 days
Shell Treasury Center West Inc | Five Year Revolver
Line Of Credit Facility [Line Items]
Debt instrument term					5 years
Line of credit facility, increase in maximum borrowing capacity								$ 360,000,000.0
Line of credit facility maximum borrowing capacity					$ 760,000,000.0			$ 760,000,000.0
Weighted average interest rate					2.00%
Repayments of debt		$ 272,600,000
Shell Treasury Center West Inc | 364 Day Revolver
Line Of Credit Facility [Line Items]
Debt instrument term					364 days
Line of credit facility maximum borrowing capacity					$ 180,000,000
Weighted average interest rate					2.00%
Repayments of debt		$ 137,400,000
Shell Treasury Center West Inc | Zydeco Revolver
Line Of Credit Facility [Line Items]
Line of credit facility maximum borrowing capacity					$ 30,000,000.0
May 2016 Acquisition
Line Of Credit Facility [Line Items]
Consideration transferred	$ 700,000,000
Transaction costs	$ 400,000
May 2016 Acquisition | Shell Treasury Center West Inc | Five Year Revolver
Line Of Credit Facility [Line Items]
Debt instrument term	5 years
Consideration, funded with borrowings	$ 296,700,000
July 2015 Acquisition
Line Of Credit Facility [Line Items]
Consideration, funded with borrowings			$ 250,000,000
July 2015 Acquisition | Shell Treasury Center West Inc | 364 Day Revolver
Line Of Credit Facility [Line Items]
Consideration, funded with borrowings			$ 100,000,000
May 2015 Acquisition
Line Of Credit Facility [Line Items]
Consideration transferred				$ 448,000,000
Consideration, funded with borrowings				70,800,000
Transaction costs				$ 500,000
May 2015 Acquisition | Shell Treasury Center West Inc | Five Year Revolver
Line Of Credit Facility [Line Items]
Debt instrument term				5 years

[1] (1) The 2015 financial information has been retrospectively adjusted for the acquisition of the Shell Auger and Lockport Operations.