Calculations of Net Income (Loss) Per Share (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||||||||||||
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Basic: | |||||||||||||||||||||
Net income (loss) | $ (10,808) | $ (8,757) | $ (10,137) | $ (9,660) | $ (24,539) | $ 22,331 | $ 121,815 | $ (9,010) | $ (39,362) | $ 110,597 | $ 26,609 | ||||||||||
Average common shares outstanding | 20,974 | 20,764 | 20,535 | ||||||||||||||||||
Net income (loss) per share | $ (0.51) | [1] | $ (0.42) | [1] | $ (0.48) | [1] | $ (0.46) | [1] | $ (1.18) | [1] | $ 1.07 | [1] | $ 5.87 | [1] | $ (0.44) | [1] | $ (1.88) | $ 5.33 | $ 1.30 | ||
Diluted: | |||||||||||||||||||||
Net income (loss) | (10,808) | (8,757) | (10,137) | (9,660) | (24,539) | 22,331 | 121,815 | (9,010) | (39,362) | 110,597 | 26,609 | ||||||||||
Interest on convertible senior debentures | 5,750 | ||||||||||||||||||||
Net income (loss) for diluted per share calculation | $ (39,362) | $ 116,347 | $ 26,609 | ||||||||||||||||||
Number of shares used in basic per share computation | 20,974 | 20,764 | 20,535 | ||||||||||||||||||
Number of shares used in diluted per share computation | 20,974 | 24,522 | 21,507 | ||||||||||||||||||
Net income (loss) per share | $ (0.51) | [1] | $ (0.42) | [1] | $ (0.48) | [1] | $ (0.46) | [1] | $ (1.18) | [1] | $ 0.98 | [1] | $ 5.05 | [1] | $ (0.46) | [1] | $ (1.88) | $ 4.74 | $ 1.24 | ||
Convertible Senior Debentures
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Diluted: | |||||||||||||||||||||
Convertible senior debentures | 3,009 | ||||||||||||||||||||
Unvested restricted stock and DSUs
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Diluted: | |||||||||||||||||||||
Stock options | 60 | 115 | |||||||||||||||||||
Employee stock options
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Diluted: | |||||||||||||||||||||
Stock options | 689 | 857 | |||||||||||||||||||
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