Subsequent Events - Additional Information (Detail)
location in Thousands, bbl in Thousands, $ in Millions, ft³ in Billions, Kwh in Billions
Feb. 10, 2017
USD ($)
bbl
Feb. 01, 2017
USD ($)
bbl
location
pipeline_supplied_distillate_terminal
distillate_storage_facility
Kwh
ft³
Feb. 16, 2017
shares
Dec. 31, 2016
shares
Global Natural Gas & Power | Subsequent Event        
Subsequent Event [Line Items]        
Business acquisition, purchase price   $ 17.3    
Consideration paid in acquisition   $ 16.1    
Number of consumer locations serviced | location   4    
Natural gas output of acquiree, annually | ft³   8    
Electricity output of acquiree, annually | Kwh   1    
L.E. Belcher Terminal | Subsequent Event        
Subsequent Event [Line Items]        
Business acquisition, purchase price   $ 20.7    
Consideration transferred, excluding inventory, other adjustments   $ 20.0    
Number of pipeline-supplied distillate terminals acquired | pipeline_supplied_distillate_terminal   2    
Number of distillate storage facilities acquired | distillate_storage_facility   1    
Distillate terminals and storage facility combine capacity, barrels | bbl   295    
Capital Terminal Acquisition | Subsequent Event        
Subsequent Event [Line Items]        
Business acquisition, purchase price $ 23.0      
Consideration paid in acquisition $ 22.0      
Acquirer leased distillate storage capacity, barrels | bbl 1,000      
Affiliated Entity | Subordinated Units        
Subsequent Event [Line Items]        
Subordinated units converted into common units (in shares) | shares       10,071,970
Affiliated Entity | Subordinated Units | Subsequent Event        
Subsequent Event [Line Items]        
Subordinated units converted into common units (in shares) | shares     10,071,970