Quarterly report pursuant to Section 13 or 15(d)

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

v3.3.0.814
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, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Earnings Per Share [Abstract]        
Weighted Average Shares, Basic 50,456 52,070 50,697 52,333
Weighted Average Shares, Stock compensation plans 313 483 389 475
Weighted Average Shares, Diluted 50,769 52,553 51,086 52,808
Income (Loss) From Continuing Operations, Amount $ 27,103 $ 24,557 $ 56,584 $ 71,602
Participating securities income (loss) from continuing operations non-vested restricted stock and restricted stock units (13) (79) (27) (229)
Income (Loss) From Continuing Operations, Basic, Amount 27,090 24,478 56,557 71,373
Income (Loss) From Continuing Operations Diluted, Amount $ 27,090 $ 24,478 $ 56,557 $ 71,373
Income (Loss) From Continuing Operations, Basic, Per Share Amount $ 0.54 $ 0.47 $ 1.12 $ 1.36
Income (Loss) From Continuing Operations, Diluted, Per Share Amount $ 0.53 $ 0.47 $ 1.11 $ 1.35
Income (Loss) From Discontinued Operations, Amount $ (598) $ 155 $ (1,331) $ (511)
Income (Loss) From Discontinued Operations, Basic, Amount (598) 155 (1,331) (511)
Income (Loss) From Discontinued Operations, Diluted, Amount $ (598) 155 $ (1,331) $ (511)
Income (Loss) From Discontinuing Operations, Basic, Per Share Amount $ (0.01)   $ (0.03) $ (0.01)
Income (Loss) From Discontinuing Operations, Diluted, Per Share Amount $ (0.01)   $ (0.03) $ (0.01)
Net Income (Loss), Amount $ 26,505 24,712 $ 55,253 $ 71,091
Net Income (Loss), Basic, Amount 26,492 24,633 55,226 70,862
Net Income (Loss), Diluted, Amount $ 26,492 $ 24,633 $ 55,226 $ 70,862
Net Income (Loss), Basic, Per Share Amount $ 0.53 $ 0.47 $ 1.09 $ 1.35
Net Income (Loss), Diluted, Per Share Amount $ 0.52 $ 0.47 $ 1.08 $ 1.34