Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 212,175	$ 190,984
Accounts receivable:
Trade	17,672	17,555
Taxes	16,204	2,029
Other, net	4,689	5,437
Inventories:
Concentrates, doré, stockpiled ore, and metals in transit and in-process	27,740	15,073
Materials and supplies	21,097	13,564
Current deferred income taxes	35,734	29,398
Other current assets	8,324	8,858
Total current assets	343,635	282,898
Non-current investments	7,019	9,614
Non-current restricted cash and investments	5,217	871
Properties, plants, equipment and mineral interests, net	1,791,601	996,659
Non-current deferred income taxes	78,780	86,365
Other non-current assets	5,867	1,883
Total assets	2,232,119	1,378,290
Current liabilities:
Accounts payable and accrued liabilities	51,152	43,162
Accrued payroll and related benefits	18,769	10,760
Accrued taxes	7,881	12,321
Current portion of capital leases	8,471	5,564
Current portion of accrued reclamation and closure costs	58,425	19,845
Other current liabilities	6,781	3,335
Total current liabilities	151,479	94,987
Long-term capital leases	14,332	11,935
Accrued reclamation and closure costs	46,766	93,370
Long-term debt	490,726
Non-current deferred tax liability	164,861
Other non-current liabilities	37,536	40,047
Total liabilities	905,700	240,339
Commitments and contingencies (Notes 2, 3, 4, 6, 7, 8, and 10)
STOCKHOLDERS’ EQUITY
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 500,000,000 shares; issued and outstanding 2013 — 342,663,381 shares and 2012 — 285,209,848 shares	85,896	71,499
Capital surplus	1,426,845	1,218,283
Accumulated deficit	(154,982)	(123,288)
Accumulated other comprehensive loss, net	(26,299)	(23,918)
Less treasury stock, at cost; 2013 — 921,721 and 2012 — 788,288 shares issued and held in treasury	(5,080)	(4,664)
Total stockholders’ equity	1,326,419	1,137,951
Total liabilities and stockholders’ equity	$ 2,232,119	$ 1,378,290