Annual report pursuant to Section 13 and 15(d)

Company And Summary Of Significant Accounting Policies - Reconciliation of Net Earnings (Loss) and Weighted Average Common Shares Outstanding (Detail)

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Company And Summary Of Significant Accounting Policies - Reconciliation of Net Earnings (Loss) and Weighted Average Common Shares Outstanding (Detail) (USD $)
In Thousands, except Per Share data, 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
Basic earnings (loss) per share                      
Net earnings (loss) $ 3,956 $ 11,004 $ (1,782) $ (3,666) $ (57,661) $ 8,285 $ (29,916) $ 11,808 $ 9,512 $ (67,484) $ 136,148
Weighted average common shares outstanding                 49,495 48,491 47,433
Basic earnings (loss) per share $ 0.08 $ 0.22 $ (0.04) $ (0.07) $ (1.18) $ 0.17 $ (0.62) $ 0.24 $ 0.19 $ (1.39) $ 2.87
Diluted earnings (loss) per share                      
Net earnings (loss) $ 3,956 $ 11,004 $ (1,782) $ (3,666) $ (57,661) $ 8,285 $ (29,916) $ 11,808 $ 9,512 $ (67,484) $ 136,148
Weighted average common shares outstanding                 49,495 48,491 47,433
Dilutive stock options                 447 0 1,617
Weighted average common shares outstanding                 49,942 48,491 49,050
Diluted earnings (loss) per share $ 0.08 $ 0.22 $ (0.04) $ (0.07) $ (1.18) $ 0.17 $ (0.62) $ 0.24 $ 0.19 $ (1.39) $ 2.78