Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 164,113	$ 169,777
Investments	37,816	29,117
Accounts receivable:
Trade	9,183	20,082
Taxes	10,981	187
Other, net	12,307	9,780
Inventories:
Concentrates, doré, and stockpiled ore	25,125	25,944
Materials and supplies	23,278	24,079
Other current assets	8,955	12,125
Total current assets	291,758	291,091
Non-current investments	4,729	5,002
Non-current restricted cash and investments	1,098	2,200
Properties, plants, equipment and mineral interests, net	2,033,506	2,032,685
Non-current deferred income taxes	44,628	35,815
Other non-current assets and deferred charges	3,437	4,884
Total assets	2,379,156	2,371,677
Current liabilities:
Accounts payable and accrued liabilities	47,979	60,064
Accrued payroll and related benefits	25,919	36,515
Accrued taxes	14,205	9,061
Current portion of capital leases	5,885	5,653
Current portion of debt		470
Other current liabilities	11,268	8,809
Current portion of accrued reclamation and closure costs	8,532	5,653
Total current liabilities	113,788	126,225
Capital leases	7,213	5,838
Accrued reclamation and closure costs	79,280	79,927
Long-term debt	501,604	500,979
Non-current deferred tax liability	121,260	122,855
Non-current pension liability	47,211	44,491
Other non-current liabilities	6,414	11,518
Total liabilities	876,770	891,833
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, authorized 750,000,000 shares; issued and outstanding 2017 — 398,527,459 shares and 2016 — 395,286,875 shares	100,739	99,806
Capital surplus	1,614,651	1,597,212
Accumulated deficit	(166,875)	(167,437)
Accumulated other comprehensive loss	(28,520)	(34,602)
Less treasury stock, at cost; 2017 — 4,429,844 shares and 2016 — 3,941,210 shares issued and held in treasury	(17,648)	(15,174)
Total shareholders’ equity	1,502,386	1,479,844
Total liabilities and shareholders’ equity	$ 2,379,156	$ 2,371,677

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.