Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Accounting Policies [Abstract]
Minimum amortization period (in years)	3 years
Maximum amortization period (in years)	5 years
Deferred turnaround expenditures	$ 34,969	$ 0