Net Income per Common Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Schedule of calculation of net income per common share

The calculation of net income per common share for the years ended December 31 was as follows:

(dollars and shares in thousands, except per share data)	2020		2019		2018
Basic:
Net income	$	132,217	$	142,943	$	152,276
Average common shares outstanding	32,334		34,179		34,306
Basic net income per common share	$	4.09	$	4.18	$	4.44
Diluted:
Net income	$	132,217	$	142,943	$	152,276
Average common shares outstanding	32,334		34,179		34,306
Adjustment for common share equivalents	28		32		137
Average common shares outstanding-diluted	32,362		34,211		34,443
Diluted net income per common share	$	4.09	$	4.18	$	4.42
Anti-dilutive shares	26		2		—