Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 176,786	$ 169,777
Short-term investments	36,505	29,117
Accounts receivable:
Trade	17,210	20,082
Other, net	22,234	9,967
Inventories:
Concentrates, doré, and stockpiled ore	30,816	25,944
Materials and supplies	23,348	24,079
Other current assets	8,256	12,125
Total current assets	315,155	291,091
Non-current investments	5,104	5,002
Non-current restricted cash and investments	2,200	2,200
Properties, plants, equipment and mineral interests, net	2,032,983	2,032,685
Non-current deferred income taxes	48,410	35,815
Other non-current assets	2,609	4,884
Total assets	2,406,461	2,371,677
Current liabilities:
Accounts payable and accrued liabilities	51,739	60,064
Accrued payroll and related benefits	38,554	36,515
Accrued taxes	11,089	9,061
Current portion of capital leases	5,647	5,653
Current portion of accrued reclamation and closure costs	7,453	5,653
Current portion of debt		470
Other current liabilities	18,173	8,809
Total current liabilities	132,655	126,225
Capital leases	6,088	5,838
Accrued reclamation and closure costs	79,334	79,927
Long-term debt	501,292	500,979
Non-current deferred tax liability	121,025	122,855
Non-current pension liability	46,443	44,491
Other non-current liabilities	5,321	11,518
Total liabilities	892,158	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, 500,000,000 shares authorized; issued and outstanding 2017 — 395,825,410 shares and 2016 — 395,286,875 shares	99,973	99,806
Capital surplus	1,603,324	1,597,212
Accumulated deficit	(141,730)	(167,437)
Accumulated other comprehensive loss	(31,398)	(34,602)
Less treasury stock, at cost; 2017 - 4,085,599 and 2016 - 3,941,210 shares issued and held in treasury	(15,905)	(15,174)
Total stockholders’ equity	1,514,303	1,479,844
Total liabilities and stockholders’ equity	$ 2,406,461	$ 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.