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Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands | Series B Preferred Stock [Member] Accumulated Deficit [Member] | Series B Preferred Stock [Member] | Mandatory Convertible Preferred Stock [Member] Additional Paid-in Capital [Member] | Mandatory Convertible Preferred Stock [Member] Accumulated Deficit [Member] | Mandatory Convertible Preferred Stock [Member] | Stock Issued To Directors [Member] Common Stock [Member] | Stock Issued To Directors [Member] Additional Paid-in Capital [Member] | Stock Issued To Directors [Member] | Bonuses Paid Through Stock Issuances [Member] Common Stock [Member] | Bonuses Paid Through Stock Issuances [Member] Additional Paid-in Capital [Member] | Bonuses Paid Through Stock Issuances [Member] | Common Stock And Warrant Private Placement Issuance [Member] Common Stock [Member] | Common Stock And Warrant Private Placement Issuance [Member] Additional Paid-in Capital [Member] | Common Stock And Warrant Private Placement Issuance [Member] | Common Stock And Warrant Public Offering [Member] Common Stock [Member] | Common Stock And Warrant Public Offering [Member] Additional Paid-in Capital [Member] | Common Stock And Warrant Public Offering [Member] | Series B Preferred Stock [Member] | Series C Mandatory Convertible Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Deficit [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Treasury Stock [Member] | Total
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Balances at Dec. 31, 2008 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 39 | $ 504 | $ 45,115 | $ 981,161 | $ (351,700) | $ (25,022) | $ (640) | $ 649,457
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 67,826 |  |  | 67,826
Options granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,068 |  |  |  | 1,068
Options exercised |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 | 33 |  |  |  | 36
Share based compensation |  |  |  |  |  | 6 | 78 | 84 | 230 | 1,932 | 2,162 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock and warrant issuance |  |  |  |  |  |  |  |  |  |  |  | 4,348 | 53,213 | 57,561 | 9,200 | 61,751 | 70,951 |  |  |  |  |  |  |  |
Warrants exercised |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 | 53 |  |  |  | 59
Conversion of convertible preferred stock to common shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 657 | 3,902 |  |  |  | 4,559
Other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,839 |  | 10,839
Preferred stock dividends declared | (690) | (690) | 16,351 | (16,351) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,633
Restricted stock units granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,573 |  |  |  | 1,573
Restricted stock unit distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 39 | (39) |  |  |  |
Balances at Dec. 31, 2009 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 39 | 504 | 59,604 | 1,121,076 | (300,915) | (14,183) | (640) | 865,485
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 48,983 |  |  | 48,983
Options granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,121 |  |  |  | 1,121
Options exercised |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 174 | 3,743 |  |  | (718) | 3,199
Share based compensation |  |  |  |  |  | 20 | 410 | 430 | 262 | (262) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercised |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,553 | 46,341 |  |  |  | 49,894
6.5% Mandatory Convertible Preferred Stock dividends paid in common stock (3,886,000 shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 971 | 5,547 |  |  |  | 6,518
Other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (934) |  | (934)
Preferred stock dividends declared | (552) | (552) |  | (13,093) | (13,093) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,633
Restricted stock units granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,895 |  |  |  | 1,895
Restricted stock unit distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 120 | (120) |  |  | (693) | (693)
Balances at Dec. 31, 2010 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 39 | 504 | 64,704 | 1,179,751 | (265,577) | (15,117) | (2,051) | 962,253
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 151,164 |  |  | 151,164
Options exercised |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19 | 460 |  |  |  | 479
Share based compensation |  |  |  |  |  | 11 | 331 | 342 | 2 | 58 | 60 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercised |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 536 | 4,771 |  |  |  | 5,307
Conversion of convertible preferred stock to common shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (504) | 4,719 | (4,215) |  |  |  |
Other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (8,381) |  | (8,381)
Preferred stock dividends declared | (552) | (552) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 552
Common stock dividends declared |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (5,592) |  |  | (5,592)
Restricted stock units granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,671 |  |  |  | 1,671
Restricted stock unit distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 80 | (80) |  |  | (469) | (469)
Common stock issued for assets purchased (5,396,000 shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,349 | 32,482 |  |  |  | 33,831
Balances at Dec. 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 39 |  | $ 71,420 | $ 1,215,229 | $ (120,557) | $ (23,498) | $ (2,520) | $ 1,140,113

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