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Earnings per Share (Tables)
 12 Months Ended
Dec. 31, 2017
Earnings Per Share Basic Other Disclosures [Abstract]  
Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted EPS

The following table reconciles the number of shares used in calculating the basic and diluted earnings per share for the years ended December 31:

 

(Dollars in thousands, except per share amounts)

 

2017

 

 

2016

 

 

2015

 

Net income

 

$

86,453

 

 

$

10,938

 

 

$

31,714

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Basic weighted-average shares outstanding

 

 

40,824,420

 

 

 

40,797,806

 

 

 

40,842,126

 

Incremental shares due to:

 

 

 

 

 

 

 

 

 

 

 

 

Performance shares

 

 

362,509

 

 

 

200,164

 

 

 

122,334

 

Restricted stock units

 

 

40,459

 

 

 

35,470

 

 

 

23,359

 

Diluted weighted-average shares outstanding

 

 

41,227,388

 

 

 

41,033,440

 

 

 

40,987,819

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Basic net income per share

 

$

2.12

 

 

$

0.27

 

 

$

0.78

 

Diluted net income per share

 

$

2.10

 

 

$

0.27

 

 

$

0.77