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Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2017
Accounting Policies [Abstract]  
Reconciliation of shares used to determine net income per share
The reconciliation of shares used to determine net income per share is as follows: (dollars in thousands,unaudited):
 
 
 
Three Months
 
Nine Months
 
 
 
ended September 30,
 
ended September 30,
 
 
 
2017
 
2016
 
2017
 
2016
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income
 
$
2,104
 
$
4,789
 
$
16,362
 
$
12,562
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Weighted average number of shares - basic
 
 
41,869,528
 
 
33,873,479
 
 
41,648,439
 
 
33,265,470
 
Shares underlying options
 
 
1,594,454
 
 
1,424,106
 
 
1,524,988
 
 
1,076,460
 
Weighted average number of shares outstanding – diluted
 
 
43,463,982
 
 
35,297,585
 
 
43,173,427
 
 
34,341,930