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Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Calculation of Basic and Diluted Earnings per Share

The following table sets forth the calculation of basic and diluted earnings per share:

Three Months EndedNine Months Ended
September 30,September 30,
(in thousands, except per share data)2018201720182017
(as adjusted)(as adjusted)
Net income (loss)$7,799$17,831$(4,899)$44,460
Denominator for basic earnings per share -
weighted-average number of common
shares outstanding during the period46,30149,86547,41549,716
Incremental common shares attributable to
exercise of dilutive options90268319
Incremental common shares attributable.
to outstanding restricted stock units64197257
Denominator for diluted earnings per share46,45550,33047,41550,292
Basic earnings (loss) per share$0.17$0.36$(0.10)$0.89
Diluted earnings (loss) per share$0.17$0.35$(0.10)$0.88