Segment Reporting - Summary of Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Goodwill [Roll Forward] |
|
|
| Goodwill, Beginning Balance |
$ 63,288
|
$ 63,288
|
| Goodwill, activity |
|
0
|
| Goodwill, Ending Balance |
70,550
|
63,288
|
| Refined products |
|
|
| Goodwill [Roll Forward] |
|
|
| Goodwill, Beginning Balance |
36,550
|
36,550
|
| Goodwill, activity |
|
0
|
| Goodwill, Ending Balance |
36,550
|
36,550
|
| Natural gas |
|
|
| Goodwill [Roll Forward] |
|
|
| Goodwill, Beginning Balance |
18,626
|
18,626
|
| Goodwill, activity |
|
0
|
| Goodwill, Ending Balance |
25,888
|
18,626
|
| Materials handling |
|
|
| Goodwill [Roll Forward] |
|
|
| Goodwill, Beginning Balance |
6,896
|
6,896
|
| Goodwill, activity |
|
0
|
| Goodwill, Ending Balance |
6,896
|
6,896
|
| Other |
|
|
| Goodwill [Roll Forward] |
|
|
| Goodwill, Beginning Balance |
1,216
|
1,216
|
| Goodwill, activity |
|
0
|
| Goodwill, Ending Balance |
1,216
|
$ 1,216
|
| Santa Buckley Energy, Inc. (SBE) |
|
|
| Goodwill [Roll Forward] |
|
|
| Goodwill, activity |
7,262
|
|
| Santa Buckley Energy, Inc. (SBE) | Refined products |
|
|
| Goodwill [Roll Forward] |
|
|
| Goodwill, activity |
0
|
|
| Santa Buckley Energy, Inc. (SBE) | Natural gas |
|
|
| Goodwill [Roll Forward] |
|
|
| Goodwill, activity |
7,262
|
|
| Santa Buckley Energy, Inc. (SBE) | Materials handling |
|
|
| Goodwill [Roll Forward] |
|
|
| Goodwill, activity |
0
|
|
| Santa Buckley Energy, Inc. (SBE) | Other |
|
|
| Goodwill [Roll Forward] |
|
|
| Goodwill, activity |
$ 0
|
|