Annual report pursuant to Section 13 and 15(d)

Earnings (Loss) Per Share - Reconciliation of Components Used to Derive Basic and Diluted EPS (Detail)

v2.4.0.6
Earnings (Loss) Per Share - Reconciliation of Components Used to Derive Basic and Diluted EPS (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
Earnings Per Share [Line Items]                      
Income (Loss) (Numerator) $ 13,979 $ 13,279 $ 55,775 $ 7,341 $ 5,506 $ 4,203 $ 8,001 $ 10,437 $ 90,374 $ 28,147 $ (88,009)
Weighted-Average Shares, Basic EPS                 31,475,510 20,403,549 11,790,278
Weighted-Average Shares, Effect of Dilutive Securities - Options, Warrants and Unvested Restricted Stock                 40,072 19,435   
Weighted-Average Shares, Diluted EPS                 31,515,582 20,422,984 11,790,278
Per Share Amount, Basic EPS $ 0.44 $ 0.42 $ 1.77 $ 0.23 $ 0.22 $ 0.22 $ 0.42 $ 0.55 $ 2.87 $ 1.38 $ (7.46)
Per Share Amount, Effect of Dilutive Securities - Options, Warrants and Unvested Restricted Stock                         
Per Share Amount, Diluted EPS $ 0.44 $ 0.42 $ 1.77 $ 0.23 $ 0.22 $ 0.22 $ 0.42 $ 0.55 $ 2.87 $ 1.38 $ (7.46)