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SEGMENT REPORTING - Summary of Financial Information by Reportable Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 151,222 | $ 160,269 | $ 154,016 | $ 133,802 | $ 143,795 | $ 151,133 | $ 144,670 | $ 125,432 | $ 599,309 | $ 565,030 | $ 546,500
Depreciation and amortization |  |  |  |  |  |  |  |  | 62,102 | 61,856 | 62,704
Operating (loss) income | 9,855 | $ 18,277 | $ (47,279) | $ 6,564 | 9,997 | $ 17,378 | $ 15,596 | $ 1,974 | (12,583) | 44,945 | 31,866
Interest expense, net |  |  |  |  |  |  |  |  | 24,887 | 38,652 | 40,090
Capital expenditures |  |  |  |  |  |  |  |  | 64,862 | 54,238 | 49,995
Goodwill | 122,605 |  |  |  | 119,899 |  |  |  | 122,605 | 119,899 | 118,976
Total assets | 614,949 |  |  |  | 631,512 |  |  |  | 614,949 | 631,512 | 633,669
Eastern |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill | 19,192 |  |  |  | 17,429 |  |  |  | 19,192 | 17,429 | 17,429
Western |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill | 89,369 |  |  |  | 88,426 |  |  |  | 89,369 | 88,426 | 87,503
Recycling |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill | 12,315 |  |  |  | 12,315 |  |  |  | 12,315 | 12,315 | 12,315
Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill | 1,729 |  |  |  | 1,729 |  |  |  | 1,729 | 1,729 | 1,729
Operating Segments | Eastern |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 181,170 | 176,539 | 167,467
Depreciation and amortization |  |  |  |  |  |  |  |  | 23,815 | 27,036 | 25,977
Operating (loss) income |  |  |  |  |  |  |  |  | (51,867) | 9,697 | 7,338
Interest expense, net |  |  |  |  |  |  |  |  | 3 | (16) | (200)
Capital expenditures |  |  |  |  |  |  |  |  | 17,153 | 18,363 | 24,840
Goodwill | 19,192 |  |  |  | 17,429 |  |  |  | 19,192 | 17,429 | 17,429
Total assets | 157,248 |  |  |  | 202,420 |  |  |  | 157,248 | 202,420 | 212,922
Operating Segments | Western |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 250,771 | 233,168 | 231,951
Depreciation and amortization |  |  |  |  |  |  |  |  | 30,766 | 27,511 | 29,488
Operating (loss) income |  |  |  |  |  |  |  |  | 35,035 | 30,576 | 26,035
Interest expense, net |  |  |  |  |  |  |  |  | (220) | (248) | 165
Capital expenditures |  |  |  |  |  |  |  |  | 42,082 | 31,637 | 20,282
Goodwill | 89,369 |  |  |  | 88,426 |  |  |  | 89,369 | 88,426 | 87,503
Total assets | 344,324 |  |  |  | 327,628 |  |  |  | 344,324 | 327,628 | 318,730
Operating Segments | Recycling |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 62,307 | 52,911 | 46,338
Depreciation and amortization |  |  |  |  |  |  |  |  | 4,125 | 4,212 | 4,480
Operating (loss) income |  |  |  |  |  |  |  |  | 2,805 | 2,542 | (2,406)
Interest expense, net |  |  |  |  |  |  |  |  | 143 | 156 | 25
Capital expenditures |  |  |  |  |  |  |  |  | 2,006 | 2,218 | 1,770
Goodwill | 12,315 |  |  |  | 12,315 |  |  |  | 12,315 | 12,315 | 12,315
Total assets | 48,612 |  |  |  | 49,931 |  |  |  | 48,612 | 49,931 | 49,355
Operating Segments | Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 105,061 | 102,412 | 100,744
Depreciation and amortization |  |  |  |  |  |  |  |  | 3,396 | 3,097 | 2,759
Operating (loss) income |  |  |  |  |  |  |  |  | 1,444 | 2,130 | 899
Interest expense, net |  |  |  |  |  |  |  |  | 24,961 | 38,760 | 40,100
Capital expenditures |  |  |  |  |  |  |  |  | 3,621 | 2,020 | 3,103
Goodwill | 1,729 |  |  |  | 1,729 |  |  |  | 1,729 | 1,729 | 1,729
Total assets | 64,765 |  |  |  | 51,533 |  |  |  | 64,765 | 51,533 | 52,662
Eliminations |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | (123,972) | (116,331) | (113,853)
Depreciation and amortization |  |  |  |  |  |  |  |  | 0 | 0 | 0
Operating (loss) income |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest expense, net |  |  |  |  |  |  |  |  | 0 | 0 | 0
Capital expenditures |  |  |  |  |  |  |  |  | 0 | 0 | 0
Goodwill | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Total assets | $ 0 |  |  |  | $ 0 |  |  |  | 0 | 0 | 0
Eliminations | Eastern |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 50,335 | 45,728 | 43,560
Eliminations | Western |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 71,510 | 67,985 | 68,284
Eliminations | Recycling |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 246 | 1,003 | 995
Eliminations | Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 1,881 | $ 1,615 | $ 1,014

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