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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Operating activities: |  |  |
Net income (loss) | $ (86,968) | $ 17,824 | $ (25,130)
Non-cash elements included in net income (loss): |  |  |
Depreciation, depletion and amortization | 112,585 | 112,173 | 82,366
Net loss (gain) on sale of investments | 44 |  | (197)
Unrealized loss on investments | 3,333 | 3,224 | 2,639
Adjustment of inventory to market value | 1,649 |  |
(Gain) loss on disposition of properties, plants, equipment and mineral interests | 404 | (25) | (75)
Provision for reclamation and closure costs | 12,036 | 10,215 | 1,788
Deferred income taxes | 54,978 | 1,895 | (5,893)
Stock compensation | 5,425 | 4,965 | 4,461
Amortization of loan origination fees | 1,821 | 2,183 | 1,435
(Gain) loss on derivative contracts | 11,630 | (6,886) | (1,338)
Foreign exchange gain | (20,081) | (10,482) | (928)
Other non-cash items | (35) | (858) | 636
Change in assets and liabilities, net of business acquired: |  |  |
Accounts receivable | (6,834) | 3,091 | (1,313)
Inventories | (854) | 1,119 | (6,507)
Other current and non-current assets | 1,195 | (580) | 3,281
Accounts payable and accrued liabilities | (4,211) | (19,697) | (10,927)
Accrued payroll and related benefits | 7,325 | 16,422 | 539
Accrued taxes | 4,653 | (3,612) | (4,775)
Accrued reclamation and closure costs and other non-current liabilities | 8,350 | (47,847) | (13,418)
Net cash provided by operating activities | 106,445 | 83,124 | 26,644
Investing activities: |  |  |
Additions to properties, plants, equipment and mineral interests | (137,443) | (122,537) | (150,736)
Proceeds from sale of investments | 14 |  | 1,772
Proceeds from disposition of properties, plants and equipment | 579 | 428 | 460
Redemptions of restricted cash and investment balances |  | 4,334 | 125
Purchases of investments | (947) | (580) | (6,001)
Purchase of a business, net of cash acquired | (809) |  | (321,117)
Net cash used by investing activities | (138,606) | (118,355) | (475,497)
Financing activities: |  |  |
Proceeds from exercise of warrants |  | 54,418 | 61
Dividends paid to common stockholders | (3,739) | (3,547) | (5,991)
Dividend paid to preferred stockholders | (552) | (552) | (552)
Debt issuance and credit facility fees paid | (127) | (938) | (1,244)
Acquisition of treasury shares | (1,874) | (3,740) | (286)
Borrowings on debt |  |  | 490,000
Payments on debt | (870) |  |
Repayments of capital leases | (9,981) | (9,137) | (7,039)
Net cash provided by (used in) financing activities | (17,143) | 36,504 | 474,949
Effect of exchange rates on cash | (5,152) | (3,783) | (4,905)
Net increase (decrease) in cash and cash equivalents | (54,456) | (2,510) | 21,191
Cash and cash equivalents at beginning of year | 209,665 | 212,175 | 190,984
Cash and cash equivalents at end of year | 155,209 | 209,665 | 212,175
Cash received (paid) during year for: |  |  |
Interest, net of amount capitalized | (22,628) | (23,749) | (13,465)
Income tax receipts (payments) | 4,186 | 7,124 | (1,402)
Significant non-cash investing and financing activities: |  |  |
Stock issued for acquisition of assets | 19,133 |  | 218,302
Capital leases acquired | 5,090 | 9,475 | $ 12,344
Payment of accrued compensation in restricted stock units | $ 3,016 | 4,600 |
Senior notes contributed to pension plan, par value |  | $ 6,500 |

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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=51831255 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=51831270 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 + Details
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- Definition The fair value of notes issued in noncash investing and financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 + Details
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- Definition Other expenses or losses included in net income that result in no cash outflows or inflows in the period and are not separately disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The cash outflow associated with the purchase of all investments (debt, security, other) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the sale of investments that are pledged or subject to withdrawal restrictions during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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