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Note 8. Shareholders' Equity | 9 Months Ended
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Sep. 30, 2012
Stockholders' Equity Note Disclosure [Text Block] | Note 8. Shareholders’ Equity Share-based Compensation Plans We periodically grant stock options, restricted stock unit awards, and/or shares of common stock to our employees and directors. We measure the fair value of compensation cost for stock options issued pursuant to our equity compensation plans using the Black-Scholes options pricing model. Stock option grants generally vest immediately. However, grants to individual executives upon hiring or retention vest over a defined service period, with cost amortized over that period. We measure compensation cost for restricted stock units and stock grants at the closing price of our stock at the time of grant. Restricted stock unit grants vest over time with compensation cost amortized over that period. On June 25, 2012, the Board of Directors granted 440,735 restricted stock units to employees, with one third of those vesting in June 2013, one third vesting in June 2014, and one third vesting in June 2015. The Board of Directors granted an additional 262,934 restricted stock units on June 25, 2012 that vest in June 2013. The $1.9 million in expense related to the unit awards vesting in 2013 will be recognized on a straight-line basis over the next twelve months, while the $0.7 million in expense related to awards vesting in each of 2014 and 2015 will be recognized over the next twenty-four and thirty-six month periods, respectively. In the second quarter of 2012, a total of 77,976 common shares were issued to nonemployee directors. We issued a total of 42,636 common shares to nonemployee directors in the second quarter of 2011. Stock-based compensation expense for restricted stock unit grants to employees and shares issued to nonemployee directors recorded in the first nine months of 2012 totaled $2.3 million, compared to $1.5 million in the same period last year. Under the terms of our equity compensation plans, we have permitted our employees' withholding tax obligations for shares which have vested, to be satisfied by net share settlement. As a result, in the first nine months of 2012, we repurchased 45,341 shares for $0.2 million, or approximately $4.47 per share. Common Stock Dividends In September 2011 and February 2012, our Board of Directors adopted a common stock dividend policy that has two components: 1) a dividend that links the amount of dividends on our common stock to our average quarterly realized silver price in the preceding quarter, and 2) a minimum annual dividend of $0.01 per share of common stock, payable quarterly when declared. For illustrative purposes only, the table below summarizes potential per share dividend amounts at different quarterly average realized price levels according to the first component of the policy:
Quarterly average realized silver price per ounce |  | Quarterly dividend per share |  | Annualized dividend per share
$30 |  | $0.01 |  | $0.04
$35 |  | $0.02 |  | $0.08
$40 |  | $0.03 |  | $0.12
$45 |  | $0.04 |  | $0.16
$50 |  | $0.05 |  | $0.20
$55 |  | $0.06 |  | $0.24
$60 |  | $0.07 |  | $0.28
The following table summarizes the common stock dividends declared by our Board of Directors under the policy described above:
Declaration date |  | (A) Silver-price- linked component per share |  | (B) Minimum annual component per share |  | (A+B) Total dividend per share |  | Total dividend amount (in millions) |  | Month of payment
February 17, 2012 |  | $0.01 |  | $0.0025 |  | $0.0125 |  | $3.6 |  | March 2012
May 8, 2012 |  | $0.02 |  | $0.0025 |  | $0.0225 |  | $6.4 |  | June 2012
August 7, 2012 |  | $— |  | $0.0025 |  | $0.0025 |  | $0.7 |  | September 2012
November 2, 2012 |  | $0.02 |  | $0.0025 |  | $0.0225 |  | $6.4 |  | anticipated in December 2012
Because the average realized silver price for the second quarter of 2012 was $27.05 per ounce, below the minimum threshold of $30 according to the policy, no silver-price-linked component was declared or paid. In the third quarter of 2012, the average realized silver price was $35.00 per ounce. The declaration and payment of common stock dividends is at the sole discretion of our Board of Directors. Common Stock Repurchase Program On May 8, 2012, we announced that our Board of Directors approved a stock repurchase program. Under the program, we are authorized to repurchase up to 20 million shares of our outstanding common stock from time to time in open market or privately negotiated transactions, depending on prevailing market conditions and other factors. The repurchase program may be modified, suspended or discontinued by us at any time. As of September 30, 2012, 60,000 shares have been purchased at an average price of $4.89 per share, leaving 19.94 million shares that may yet be purchased under the program. The closing price of our common stock at November 2, 2012, was $6.49 per share. Conversion of 6.5% Mandatory Convertible Preferred Stock to Common Stock On January 1, 2011, all 2,012,500 outstanding shares of our 6.5% Mandatory Convertible Preferred Stock were automatically converted to shares of our common stock at a conversion rate of 9.3773 shares of Common Stock for each share of 6.5% Mandatory Convertible Preferred Stock. We issued approximately 18.9 million shares of common stock in connection with the mandatory conversion. The final $3.3 million quarterly dividend on the 6.5% Mandatory Convertible Preferred Stock for the quarter ended December 31, 2010 was paid in cash in January 2011. Warrants The following table summarizes certain information about our stock purchase warrants at September 30, 2012:
Warrants Outstanding |  | Warrants |  | Exercise Price |  | Expiration Date
Series 1 warrants |  | 5,200,519 |  | $ | 2.42 |  | June 2014
Series 1 warrants |  | 460,976 |  | 2.53 |  | June 2014
Series 3 warrants |  | 16,671,128 |  | 2.47 |  | August 2014
Total warrants outstanding |  | 22,332,623 |  |  |  |
No warrants were exercised during the first nine months of 2012. Under the terms of the Consent Decree settling the Coeur d’Alene Basin litigation, the proceeds from the exercise of our outstanding warrants will be paid to the Plaintiffs within 30 days after the end of the quarter when exercised. As such, proceeds from Series 1 and Series 3 warrant exercises totaling approximately $0.7 million and $9.8 million were paid to the Plaintiffs in 2012 and 2011, respectively.

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- Definition The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Preferred Stock -URI http://asc.fasb.org/extlink&oid=6521494 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB TOPIC 4.C) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187143-122770 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section B -Paragraph 7, 11A -Chapter 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section C Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph d -Article 4 Reference 16: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 17: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 4.E) -URI http://asc.fasb.org/extlink&oid=6228006&loc=d3e74512-122707 Reference 18: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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