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Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 215,715 | $ 62,452
Accounts receivable: |  |
Trade | 6,062 | 11,952
Taxes | 12,547 | 20,048
Other, net | 9,188 | 6,421
Inventories: |  |
Concentrates, doré, and stockpiled ore | 39,450 | 30,364
Materials and supplies | 35,672 | 35,849
Prepaid taxes | 5,114 | 107
Other current assets | 18,794 | 11,931
Total current assets | 342,542 | 179,124
Non-current investments | 4,919 | 6,207
Non-current restricted cash and investments | 1,053 | 1,025
Properties, plants, equipment and mineral interests, net | 2,393,187 | 2,423,698
Operating lease right-of-use assets | 14,909 | 16,381
Non-current deferred income taxes | 3,007 | 3,537
Other non-current assets and deferred charges | 4,507 | 7,336
Total assets | 2,764,124 | 2,637,308
Current liabilities: |  |
Accounts payable and accrued liabilities | 49,437 | 57,716
Accrued payroll and related benefits | 34,478 | 26,916
Accrued taxes | 5,842 | 4,776
Current portion of finance leases | 5,391 | 5,429
Current portion of operating leases | 4,792 | 5,580
Current portion of accrued reclamation and closure costs | 5,277 | 4,581
Accrued interest | 4,305 | 5,804
Other current liabilities | 7,661 | 6,172
Total current liabilities | 117,183 | 116,974
Non-current finance leases | 5,810 | 7,214
Non-current operating leases | 10,139 | 10,818
Accrued reclamation and closure costs | 97,509 | 103,793
Long-term debt - Senior Notes | 469,021 | 504,729
Long-term debt - revolving credit facility | 210,000 | 0
Non-current deferred tax liability | 126,237 | 138,282
Non-current pension liability | 57,309 | 56,219
Other non-current liabilities | 14,033 | 6,856
Total liabilities | 1,107,241 | 944,885
Commitments and contingencies (Notes 2, 4, 7, 9, and 11) |  |
Preferred stock, 5,000,000 shares authorized: Series B preferred stock, $0.25 par value, 157,816 shares issued and outstanding, liquidation preference — $7,891 | 39 | 39
Common stock, $0.25 par value, 750,000,000 authorized shares; issued March 31, 2020 — 529,534,568 shares and December 31, 2019 — 529,182,994 shares | 132,381 | 132,292
Capital surplus | 1,976,033 | 1,973,700
Accumulated deficit | (371,958) | (353,331)
Accumulated other comprehensive loss | (56,645) | (37,310)
Less treasury stock, at cost; March 31, 2020 and December 31, 2019 - 6,287,271 shares issued and held in treasury | (22,967) | (22,967)
Total stockholders’ equity | 1,656,883 | 1,692,423
Total liabilities and stockholders’ equity | $ 2,764,124 | $ 2,637,308

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- Definition Amount of a reclamation and mine closing liability that is associated with a legal obligation for the closure and reclamation of a mine including the removal of buildings, equipment, machinery and other physical remnants of mining, closure of tailings impoundments, leach pads and other mine features, and contouring, covering and revegetation of waste rock piles and other disturbed areas. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q2) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
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