Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Schedule of reconciliation of the number of shares used in the calculation of basic and diluted earnings per common share

The following table presents a reconciliation of the number of shares used in the calculation of basic and diluted earnings per common share for the three years ending December 31.

(Dollars in thousands - except per share amounts)	2017		2016		2015
Distributed earnings allocated to common stock	$	19,701	$	18,707	$	17,582
Undistributed earnings allocated to common stock	47,830		38,670		39,336
Net earnings allocated to common stock	67,531		57,377		56,918
Net earnings allocated to participating securities	520		409		568
Net income allocated to common stock and participating securities	$	68,051	$	57,786	$	57,486
Weighted average shares outstanding for basic earnings per common share	25,925,820		25,879,397		26,173,351
Dilutive effect of stock compensation	—		—		—
Weighted average shares outstanding for diluted earnings per common share	25,925,820		25,879,397		26,173,351
Basic earnings per common share	$	2.60	$	2.22	$	2.17
Diluted earnings per common share	$	2.60	$	2.22	$	2.17