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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2015
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 EndedSix Months Ended
June 30,June 30,
(in thousands, except per share data)2015201420152014
Net income$21,210$22,150$35,415$41,275
Denominator for basic earnings per share -
weighted-average number of common
shares outstanding during the period52,18053,82652,32153,738
Incremental common shares attributable to
exercise of dilutive options386443387461
Incremental common shares attributable
to outstanding restricted shares and
restricted stock units105136176195
Denominator for diluted earnings per share52,67154,40552,88454,394
Basic earnings per share$0.41$0.41$0.68$0.77
Diluted earnings per share$0.40$0.41$0.67$0.76