Segment Reporting - Reconciliation of Adjusted EBITDA (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]                      
Total Adjusted EBITDA                 $ 42,752 $ 15,266 $ 1,971
Interest expense                 (4,368) (4,825) (3,241)
Depreciation and amortization                 (6,110) (2,631) (502)
Provision for income taxes                 (5,755) (186) (30)
Gain associated with derivative instruments                 5,161 1,536 0
Settlement of derivative contracts                 (4,283) (344) 0
Unit based compensation expense                 (2,461) (550) 0
Foreign currency transaction gain (loss)                 201 (4,850) (39)
Unrecovered reimbursable freight costs                 0 (1,616) 0
Deferred revenue associated with minimum commitment fees                 (7,444) (9,478) 0
Income (loss) from continuing operations $ 6,675 $ 6,325 $ 2,652 $ 2,041 $ (1,229) $ (1,179) $ (4,199) $ (1,071) 17,693 (7,678) (1,841)
Settlement of derivatives                 403 64  
Corporate Segment                      
Segment Reporting Information [Line Items]                      
Total Adjusted EBITDA                 (5,022) (1,318) (374)
Terminalling services | Operating Segments                      
Segment Reporting Information [Line Items]                      
Total Adjusted EBITDA                 45,347 15,397 1,528
Interest expense                 (2,026) (3,600) (3,241)
Provision for income taxes                 (5,581) (47) (21)
Foreign currency transaction gain (loss)                 (166) (4,406) (39)
Income (loss) from continuing operations                 24,898 (3,573) (2,275)
Fleet services | Operating Segments                      
Segment Reporting Information [Line Items]                      
Total Adjusted EBITDA                 2,427 1,187 817
Interest expense                 0 0 0
Provision for income taxes                 (173) (140) (9)
Foreign currency transaction gain (loss)                 (43) 17 0
Income (loss) from continuing operations                 $ 2,211 $ (552) $ 808