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 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Earnings Per Share [Abstract]        
Weighted Average Shares, Basic 45,118 50,456 45,930 50,697
Weighted Average Shares, Stock compensation plans 236 313 200 389
Weighted Average Shares, Diluted 45,354 50,769 46,130 51,086
Income (Loss) From Continuing Operations, Amount $ 18,969 $ 27,103 $ 56,475 $ 56,584
Participating securities income (loss) from continuing operations non-vested restricted stock (11) (13) (31) (27)
Income (Loss) From Continuing Operations, Basic, Amount 18,958 27,090 56,444 56,557
Income (Loss) From Continuing Operations Diluted, Amount $ 18,958 $ 27,090 $ 56,444 $ 56,557
Income (Loss) From Continuing Operations, Basic, Per Share Amount $ 0.42 $ 0.54 $ 1.23 $ 1.12
Income (Loss) From Continuing Operations, Diluted, Per Share Amount $ 0.42 $ 0.53 $ 1.22 $ 1.11
Dilutive effect on earnings per share $ (858) $ (598) $ (918) $ (1,331)
Income (Loss) From Discontinued Operations, Basic earnings (loss), Amount (858) (598) (918) (1,331)
Income (Loss) From Discontinued Operations, Diluted earnings (loss), Amount $ (858) $ (598) $ (918) $ (1,331)
Income (Loss) From Discontinuing Operations, Basic earnings (loss), Per Share Amount $ (0.02) $ (0.01) $ (0.02) $ (0.03)
Income (Loss) From Discontinued Operations, Diluted earnings (loss), Per Share Amount $ (0.02) $ (0.01) $ (0.02) $ (0.03)
Net Income (Loss), Amount $ 18,111 $ 26,505 $ 55,557 $ 55,253
Net Income (Loss), Basic, Amount 18,100 26,492 55,526 55,226
Net Income (Loss), Diluted, Amount $ 18,100 $ 26,492 $ 55,526 $ 55,226
Net Income (Loss), Basic, Per Share Amount $ 0.40 $ 0.53 $ 1.21 $ 1.09
Net Income (Loss), Diluted, Per Share Amount $ 0.40 $ 0.52 $ 1.20 $ 1.08