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SEGMENT REPORTING - Summary of Financial Information by Reportable Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 147,455 | $ 133,802 |
Depreciation and amortization | 15,983 | 13,849 |
Operating income (loss) | 838 | 6,564 |
Total assets | 631,375 | 621,249 | $ 614,949
Operating Segments | Eastern |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 44,505 | 38,686 |
Depreciation and amortization | 5,979 | 5,404 |
Operating income (loss) | (1,812) | 21 |
Total assets | 174,860 | 197,817 |
Operating Segments | Western |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 64,739 | 54,144 |
Depreciation and amortization | 8,032 | 6,604 |
Operating income (loss) | 7,194 | 4,089 |
Total assets | 342,285 | 324,262 |
Operating Segments | Recycling |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 10,157 | 16,635 |
Depreciation and amortization | 1,054 | 1,004 |
Operating income (loss) | (5,167) | 1,583 |
Total assets | 47,065 | 50,138 |
Operating Segments | Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 28,054 | 24,337 |
Depreciation and amortization | 918 | 837 |
Operating income (loss) | 623 | 871 |
Total assets | 67,165 | 49,032 |
Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | (31,439) | (25,433) |
Depreciation and amortization | 0 | 0 |
Operating income (loss) | 0 | 0 |
Total assets | 0 | 0 |
Eliminations | Eastern |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 11,306 | 9,522 |
Eliminations | Western |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 18,631 | 15,781 |
Eliminations | Recycling |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 1,185 | (244) |
Eliminations | Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 317 | $ 374 |

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