Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Details)

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Earnings Per Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Basic and Diluted Earnings Per Common Share        
Basic weighted average number of shares outstanding 39,118 36,151 38,904 35,976
Convertible debt 2,176 [1] 2,176 [1] 2,176 [1] 2,176 [1]
Effect of dilutive securities:        
Stock options and unvested restricted stock 304 431 407 510
Diluted weighted average shares outstanding 41,598 38,758 41,487 38,662
Net earnings as reported $ 35,079 $ 28,143 $ 60,456 $ 40,184
Interest attributable to convertible senior notes, net of income taxes 378 393 757 782
Net earnings for diluted earnings per share $ 35,457 $ 28,536 $ 61,213 $ 40,966
Basic earnings per share $ 0.90 $ 0.78 $ 1.55 $ 1.12
Diluted earnings per share (1) $ 0.85 [1] $ 0.74 [1] $ 1.48 [1] $ 1.06 [1]
Antidilutive stock options not included in the calculation of diluted income per share 254 5 20 3
[1] (1)In accordance with ASC Subtopic 260-10, Earnings Per Share, we calculate the dilutive effect of convertible securities using the "if-converted" method.