Net Income per Share of Common Stock (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

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

Year ended December 31, (dollars in thousands, except earnings per share)	2015		2014		2013
Numerator for earnings per share:
Net income that is available to common shareholders	$	66,333	$	4,963	$	28,459
Denominator for basic earnings per share:
Weighted average shares outstanding	21,816,935		21,716,288		21,216,780
Denominator for diluted earnings per share:
Effect of stock options and restricted stock units	342,214		467,249		525,393
Adjusted weighted average shares and assumed conversions	22,159,149		22,183,537		21,742,173
Basic earnings per share	$	3.04	$	0.23	$	1.34
Diluted earnings per share	$	2.99	$	0.22	$	1.31
Shares excluded from diluted earnings per share due to:
Inclusion would have been anti-dilutive (excluded from calculation)	105,201		168,557		202,375