Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 62,452	$ 27,389
Accounts receivable:
Trade	11,952	4,184
Taxes	20,048	14,191
Other, net	6,421	7,443
Inventories:
Concentrates, doré, stockpiled ore, and metals in transit and in-process	30,364	53,172
Materials and supplies	35,849	34,361
Prepaid taxes	107	12,231
Other current assets	11,931	11,179
Total current assets	179,124	164,150
Non-current investments	6,207	6,583
Non-current restricted cash and investments	1,025	1,025
Properties, plants, equipment and mineral interests, net	2,423,698	2,520,004
Operating lease right-of-use assets	16,381	0
Deferred income taxes	3,537	1,987
Other non-current assets	7,336	10,195
Total assets	2,637,308	2,703,944
Current liabilities:
Accounts payable and accrued liabilities	57,716	77,861
Accrued payroll and related benefits	26,916	30,034
Accrued taxes	4,776	7,727
Current portion of finance leases	5,429	5,264
Current portion of operating leases	5,580	0
Current portion of accrued reclamation and closure costs	4,581	3,410
Accrued interest	5,804	5,961
Other current liabilities	6,172	5,937
Total current liabilities	116,974	136,194
Non-current finance leases	7,214	7,871
Non-current operating leases	10,818	0
Accrued reclamation and closure costs	103,793	104,979
Long-term debt	504,729	532,799
Deferred tax liability	138,282	173,537
Non-current pension liability	56,219	47,711
Other non-current liabilities	6,856	9,890
Total liabilities	944,885	1,012,981
Commitments and contingencies (Notes 2, 3, 4, 6, 7, 8, and 10)
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, authorized 750,000,000 shares; issued 2019 — 529,182,994 shares and 2018 — 487,830,728 shares	132,292	121,956
Capital surplus	1,973,700	1,880,481
Accumulated deficit	(353,331)	(248,308)
Accumulated other comprehensive loss, net	(37,310)	(42,469)
Less treasury stock, at cost; 2019 — 6,287,271 and 2018 — 5,226,791 shares issued and held in treasury	(22,967)	(20,736)
Total stockholders’ equity	1,692,423	1,690,963
Total liabilities and stockholders’ equity	$ 2,637,308	$ 2,703,944