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SEGMENT REPORTING - Summary of Financial Information by Reportable Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 163,664 | $ 147,455 |
Depreciation and amortization | 17,489 | 15,983 |
Operating income (loss) | 4,442 | 838 |
Total assets | 828,313 |  | $ 732,410
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 163,664 | 147,455 |
Depreciation and amortization | 17,489 | 15,983 |
Operating income (loss) | 4,442 | 838 |
Total assets | 828,313 | 631,375 |
Operating Segments | Eastern |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 46,997 | 44,505 |
Depreciation and amortization | 5,260 | 5,979 |
Operating income (loss) | (626) | (1,812) |
Total assets | 195,851 | 174,860 |
Operating Segments | Western |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 73,634 | 64,739 |
Depreciation and amortization | 10,239 | 8,032 |
Operating income (loss) | 5,356 | 7,194 |
Total assets | 493,775 | 342,285 |
Operating Segments | Recycling |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 10,766 | 10,157 |
Depreciation and amortization | 969 | 1,054 |
Operating income (loss) | (941) | (5,167) |
Total assets | 54,829 | 47,065 |
Operating Segments | Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 32,267 | 28,054 |
Depreciation and amortization | 1,021 | 918 |
Operating income (loss) | 653 | 623 |
Total assets | 83,858 | 67,165 |
Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | (33,376) | (31,439) |
Eliminations | Eastern |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 10,771 | 11,306 |
Eliminations | Western |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 20,101 | 18,631 |
Eliminations | Recycling |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 1,971 | 1,185 |
Eliminations | Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 533 | $ 317 |

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