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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Operating activities: |  |  |
Net income (loss) | $ 3,325 | $ 18,757 | $ 5,418
Reconciliation of net income (loss) to cash provided by operating activities: |  |  |
Depreciation, depletion, amortization, and accretion | 80,985 | 75,747 | 94,839
Impairments of long-lived assets | 9,578 | 8,360 | 15,738
Provision (benefit) for deferred income taxes | (9,824) | (2,012) | (5,757)
Equity-based compensation expense | 6,724 | 9,441 | 6,288
Provision for doubtful accounts | 374 | (237) | 973
(Gain) loss on sale of property, plant, and equipment | (5,776) | (4,916) | (58,674)
Excess decommissioning/abandoning costs | 75,312 | 40,767 | 78,382
Other non-cash charges and credits | (10,165) | (6,527) | (6,149)
Changes in operating assets and liabilities, net of assets acquired: |  |  |
Accounts receivable | 14,139 | (31,229) | 16,129
Inventories | 3,011 | (3,749) | 2,158
Prepaid expenses and other current assets | 12,281 | (1,335) | 23,447
Trade accounts payable and accrued expenses | (16,192) | 7,291 | (29,984)
Decommissioning liabilities | (114,109) | (94,419) | (101,920)
Other | (7) | 1,730 | 2,899
Net cash provided by operating activities | 49,656 | 17,669 | 43,787
Investing activities: |  |  |
Purchases of property, plant, and equipment | (101,379) | (107,524) | (123,604)
Business combinations, net of cash acquired | 0 | (163,305) | (1,500)
Proceeds from sale of property, plant, and equipment | 1,794 | 59,325 | 188,273
Other investing activities | (440) | 4,817 | (16,330)
Net cash provided by (used in) investing activities | (100,025) | (206,687) | 46,839
Financing activities: |  |  |
Proceeds from long-term debt | 140,971 | 88,426 | 0
Principal payments on long-term debt | (120,664) | (28,597) | 0
Excess tax benefit from equity-based compensation | 0 | 198 | 1,334
Proceeds from issuance of Compressco Partners' common units, net of underwriters' discount | 0 | 0 | 50,234
Compressco Partners' offering costs | 0 | 0 | (2,747)
Compressco Partners' distributions | (4,846) | (4,513) | (1,159)
Proceeds from sale of common stock and exercise of stock options | 2,251 | 784 | 3,418
Deferred financing costs | (1,978) | 0 | (347)
Net cash provided by (used in) financing activities | 15,734 | 56,298 | 50,733
Effect of exchange rate changes on cash | (659) | 2,356 | (2,307)
Increase (decrease) in cash and cash equivalents | (35,294) | (130,364) | 139,052
Cash and cash equivalents at beginning of period | 74,048 | 204,412 | 65,360
Cash and cash equivalents at end of period | 38,754 | 74,048 | 204,412
Supplemental cash flow information: |  |  |
Interest paid | 17,728 | 18,711 | 18,145
Taxes paid (refunded) | 7,438 | 8,020 | (12,649)
Supplemental disclosure of non-cash investing and financing activities: |  |  |
Adjustment of fair value of decommissioning liabilities capitalized to oil and gas properties | $ 0 | $ 0 | $ 1,804

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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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