Quarterly report pursuant to Section 13 or 15(d)

Per Share Data and Stockholders' Equity - Dilutive Effect on Earnings Per Share (Detail)

v3.2.0.727
Per Share Data and Stockholders' Equity - Dilutive Effect on Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Earnings Per Share [Abstract]        
Weighted Average Shares, Earning (loss) and shares 50,784 52,514 50,819 52,466
Weighted Average Shares, Stock compensation plans 309 416 428 472
Weighted Average Shares, Diluted earnings (loss) and shares 51,093 52,930 51,247 52,938
Income (Loss) From Continuing Operations, Amount $ 15,092 $ 27,061 $ 29,481 $ 47,045
Participating securities income (loss) from continuing operations non-vested restricted stock and restricted stock units (7) (87) (14) (151)
Income (Loss) From Continuing Operations, Basic 15,085 26,974 29,467 46,894
Income (Loss) From Continuing Operations Diluted, Amount $ 15,085 $ 26,974 $ 29,467 $ 46,894
Income (Loss) From Continuing Operations, Basic earnings (loss), Per Share Amount $ 0.30 $ 0.51 $ 0.58 $ 0.89
Income (Loss) From Continuing Operations, Diluted earnings (loss), Per Share Amount $ 0.30 $ 0.51 $ 0.57 $ 0.89
Dilutive effect on earnings per share $ (311) $ (68) $ (732) $ (666)
Income (Loss) From Discontinued Operations, Basic earnings (loss), Amount (311) (68) (732) (666)
Income (Loss) From Discontinued Operations, Diluted earnings (loss), Amount $ (311) (68) $ (732) $ (666)
Income (Loss) From Discontinuing Operations, Basic earnings (loss), Per Share Amount $ (0.01)   $ (0.01) $ (0.01)
Income (Loss) From Discontinued Operations, Diluted earnings (loss), Per Share Amount $ (0.01)   $ (0.01) $ (0.02)
Net Income (Loss), Amount $ 14,781 26,993 $ 28,749 $ 46,379
Net Income (Loss), Basic, Amount 14,774 26,906 28,735 46,228
Net Income (Loss), Diluted, Amount $ 14,774 $ 26,906 $ 28,735 $ 46,228
Net Income (Loss), Basic, Per Share Amount $ 0.29 $ 0.51 $ 0.57 $ 0.88
Net Income (Loss), Diluted, Per Share Amount $ 0.29 $ 0.51 $ 0.56 $ 0.87