Quarterly report pursuant to Section 13 or 15(d)

Per Share Data and Stockholders' Equity (Details)

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Per Share Data and Stockholders' Equity (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dilutive effect on earnings per share        
Weighted Average Share Earning (Loss) 52,597 52,593 52,591 52,409
Income (loss) From Continuing Operations, Amount $ 8,717 $ 28,998 $ 30,415 $ 50,143
Dilutive effect on earnings per share 199 (819) (208) (1,466)
Net income (loss), Amount 8,916 28,179 30,207 48,677
Effect of participating securities:        
Participating securities income (loss) from continuing operations non-vested restricted stock and stock units (71) (452) (237) (777)
Participating securities net income (loss) attributable to parent non-vested restricted stock and stock units (71) (452) (237) (777)
Income (loss) from Continuing Operations Basic 8,646 28,546 30,178 49,366
Income (Loss) From Continuing Operations, Basic earnings (loss), Per Share Amount $ 0.16 $ 0.54 $ 0.57 $ 0.94
Income (Loss) From Discontinued Operations, Basic earnings (loss), Amount 199 (819) (208) (1,466)
Income (Loss) From Discontinuing Operations, Basic earnings (loss), Per Share Amount $ 0.01 $ (0.01)    $ (0.03)
Net Income (Loss), Amount 8,845 27,727 29,970 47,900
Net Income (Loss), Per Share Amount $ 0.17 $ 0.53 $ 0.57 $ 0.91
Effect of dilutive securities:        
Weighted Average Shares, Contingently convertible debt   10,535   11,106
Income (Loss) From Continuing Operations, Contingently Convertible debt, Amount   1,856   3,981
Income (Loss) From Discontinued Operations, Contingently Convertible debt, Amount   33   80
Net Income (Loss), Contingently Convertible debt, Amount   1,889   4,061
Weighted Average Share, Stock compensation plans 345 378 346 448
Weighted Average Shares, Diluted earnings (loss) and shares 52,942 63,506 52,937 63,963
Income (Loss) From Continuing Operations Diluted, Amount 8,646 30,402 30,178 53,347
Income (Loss) From Continuing Operations Diluted, Per Share Amount $ 0.16 $ 0.48 $ 0.57 $ 0.83
Income (Loss) From Discontinued Operations Diluted, Amount 199 (786) (208) (1,386)
Income (Loss) From Discontinued Operations Diluted, Per Share Amount $ 0.01 $ (0.01)    $ (0.02)
Net Income (Loss) Diluted, Amount $ 8,845 $ 29,616 $ 29,970 $ 51,961
Net Income (Loss) Diluted, Per Share Amount $ 0.17 $ 0.47 $ 0.57 $ 0.81