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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Cash Flows from Operating Activities:    
Net income (loss) $ (41,820) $ 5,116
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 46,307 46,430
Depletion of landfill operating lease obligations 6,834 7,130
Interest accretion on landfill and environmental remediation liabilities 3,205 2,688
Amortization of debt issuance costs and discount on long-term debt 2,005 3,106
Stock-based compensation 4,784 2,377
Gain on sale of property and equipment (43) (541)
Southbridge Landfill non-cash closure charge 63,526 0
Loss on debt extinguishment 517 736
Deferred income taxes 384 528
Changes in assets and liabilities, net of effects of acquisitions and divestitures:    
Accounts receivable (3,887) (3,188)
Accounts payable 2,046 2,376
Prepaid expenses, inventories and other assets (1,722) (3,262)
Accrued expenses and other liabilities (3,036) (7,425)
Net cash provided by operating activities 79,100 56,071
Cash Flows from Investing Activities:    
Acquisitions, net of cash acquired (3,563) (2,439)
Acquisition related additions to property, plant and equipment (182) (38)
Additions to property, plant and equipment (43,230) (37,435)
Payments on landfill operating lease contracts (3,731) (4,811)
Proceeds from sale of property and equipment 657 1,069
Net cash used in investing activities (50,049) (43,654)
Cash Flows from Financing Activities:    
Proceeds from long-term borrowings 146,400 140,700
Principal payments on long-term debt (175,244) (152,123)
Payments of debt issuance costs (1,451) (682)
Payments of debt extinguishment costs 0 (410)
Proceeds from the exercise of share based awards 1,003 0
Change in restricted cash 0 1,347
Net cash used in financing activities (29,292) (11,168)
Net (decrease) increase in cash and cash equivalents (241) 1,249
Cash and cash equivalents, beginning of period 2,544 2,312
Cash and cash equivalents, end of period 2,303 3,561
Cash paid during the period for:    
Interest 19,417 33,723
Income taxes, net of refunds 248 242
Supplemental Disclosure of Non-Cash Investing and Financing Activities:    
Non-current assets obtained through long-term obligations $ 3,564 $ 1,841