Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
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, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Earnings Per Share [Abstract]        
Weighted Average Shares, Basic 45,731 50,784 46,340 50,819
Weighted Average Shares, Stock compensation plans 193 309 183 428
Weighted Average Shares, Diluted 45,924 51,093 46,523 51,247
Income (Loss) From Continuing Operations, Amount $ 23,043 $ 15,092 $ 37,507 $ 29,481
Participating securities income (loss) from continuing operations non-vested restricted stock (13) (7) (21) (14)
Income (Loss) From Continuing Operations, Basic, Amount 23,030 15,085 37,486 29,467
Income (Loss) From Continuing Operations Diluted, Amount $ 23,030 $ 15,085 $ 37,486 $ 29,467
Income (Loss) From Continuing Operations, Basic, Per Share Amount $ 0.50 $ 0.30 $ 0.81 $ 0.58
Income (Loss) From Continuing Operations, Diluted, Per Share Amount $ 0.50 $ 0.30 $ 0.81 $ 0.57
Dilutive effect on earnings per share $ (221) $ (311) $ (61) $ (732)
Income (Loss) From Discontinued Operations, Basic earnings (loss), Amount (221) (311) (61) (732)
Income (Loss) From Discontinued Operations, Diluted earnings (loss), Amount (221) $ (311) $ (61) $ (732)
Income (Loss) From Discontinuing Operations, Basic earnings (loss), Per Share Amount   $ (0.01)   $ (0.01)
Income (Loss) From Discontinued Operations, Diluted earnings (loss), Per Share Amount   $ (0.01) $ (0.01) $ (0.01)
Net Income (Loss), Amount 22,822 $ 14,781 $ 37,446 $ 28,749
Net Income (Loss), Basic, Amount 22,809 14,774 37,425 28,735
Net Income (Loss), Diluted, Amount $ 22,809 $ 14,774 $ 37,425 $ 28,735
Net Income (Loss), Basic, Per Share Amount $ 0.50 $ 0.29 $ 0.81 $ 0.57
Net Income (Loss), Diluted, Per Share Amount $ 0.50 $ 0.29 $ 0.80 $ 0.56