Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
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, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Earnings Per Share [Abstract]        
Weighted Average Shares, Basic 43,496 45,118 44,281 45,930
Weighted Average Shares, Stock compensation plans 315 236 304 200
Weighted Average Shares, Diluted 43,811 45,354 44,585 46,130
Income (Loss) From Continuing Operations, Amount $ 19,730 $ 18,969 $ 32,024 $ 56,475
Participating securities income (loss) from continuing operations non-vested restricted stock (18) (11) (28) (31)
Income (Loss) From Continuing Operations, Basic, Amount 19,712 18,958 31,996 56,444
Income (Loss) From Continuing Operations Diluted, Amount $ 19,712 $ 18,958 $ 31,996 $ 56,444
Income (Loss) From Continuing Operations, Basic, Per Share Amount $ 0.45 $ 0.42 $ 0.72 $ 1.23
Income (Loss) From Continuing Operations, Diluted, Per Share Amount $ 0.45 $ 0.42 $ 0.72 $ 1.22
Income (Loss) From Discontinued Operations, Earnings (loss), Amount $ (290) $ (858) $ (993) $ (918)
Income (Loss) From Discontinued Operations, Basic earnings (loss), Amount (290) (858) (993) (918)
Income (Loss) From Discontinued Operations, Diluted earnings (loss), Amount $ (290) $ (858) $ (993) $ (918)
Income (Loss) From Discontinued Operations, Basic earnings (loss), Per Share Amount   $ (0.02) $ (0.02) $ (0.02)
Income (Loss) From Discontinued Operations, Diluted earnings (loss), Per Share Amount $ (0.01) $ (0.02) $ (0.02) $ (0.02)
Net Income (Loss), Amount $ 19,440 $ 18,111 $ 31,031 $ 55,557
Participating securities net income (loss) non-vested restricted stock (18) (11) (28) (31)
Net Income (Loss), Basic, Amount 19,422 18,100 31,003 55,526
Net Income (Loss), Diluted, Amount $ 19,422 $ 18,100 $ 31,003 $ 55,526
Net Income (Loss), Basic, Per Share Amount $ 0.45 $ 0.40 $ 0.70 $ 1.21
Net Income (Loss), Diluted, Per Share Amount $ 0.44 $ 0.40 $ 0.70 $ 1.20