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Components of Calculation of Earnings Per Share (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Earnings Per Share Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | $ 29,359 | [1] | $ 78,657 | [1] | $ 10,580 | [1] | $ 32,750 | [1] | $ 37,099 | [2] | $ 78,756 | [2] | $ 51,206 | [2] | $ 26,112 | [2] | $ 151,346 | $ 193,173 | $ 144,646
Weighted average number of shares used in: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 69,571 | 69,996 | 75,905
Dilutive common stock equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options and restricted stock units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 318 | 386 | 603
Diluted earnings per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 69,889 | 70,382 | 76,508
[1] | The first, second, third and fourth quarters of 2012 include rationalization charges of $3.6 million, $0.2 million, $2.0 million and $2.9 million, respectively. The first, second, third and fourth quarters of 2012 include plant start-up costs of $1.0 million, $1.9 million, $1.4 million and $2.1 million, respectively. The second and third quarters of 2012 include costs attributable to announced acquisitions of $0.7 million and $0.8 million, respectively. The second quarter of 2012 includes a loss on early extinguishment of debt of $38.7 million.
[2] | The first, second, third and fourth quarters of 2011 include rationalization charges of $1.7 million, $2.4 million, $0.6 million and $2.9 million, respectively. The first quarter of 2011 includes costs attributable to announced acquisitions of $1.8 million. The second quarter of 2011 includes income of $27.0 million for proceeds received as a result of the termination of the merger agreement with Graham Packaging, net of costs associated with certain corporate development activities, and a charge for the resolution of a past product liability dispute of $3.3 million. The third quarter of 2011 includes a loss on early extinguishment of debt of $1.0 million.

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