Net Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Basic and Diluted Net Income Per Common Share

Basic and diluted net income per common share are calculated as follows:

	Income (Numerator)		Shares (Denominator)		Per Share Amount
	(Dollars in thousands, except per share data)
Three Months Ended September 30, 2020
Basic
Income available to common stockholders	$	20,890		32,668,789	$	0.64
Dilutive effect of stock options		—		500,149
Diluted
Income available to common stockholders plus assumed    exercises of stock options	$	20,890		33,168,938	$	0.63
Three Months Ended September 30, 2019
Basic
Income available to common stockholders	$	33,368		32,641,902	$	1.02
Dilutive effect of stock options		—		685,311
Diluted
Income available to common stockholders plus assumed    exercises of stock options	$	33,368		33,327,213	$	1.00
Nine Months Ended September 30, 2020
Basic
Income available to common stockholders	$	64,228		32,666,554	$	1.97
Dilutive effect of stock options		—		523,740
Diluted
Income available to common stockholders plus assumed    exercises of stock options	$	64,228		33,190,294	$	1.94
Nine Months Ended September 30, 2019
Basic
Income available to common stockholders	$	99,372		32,627,924	$	3.04
Dilutive effect of stock options		—		686,374
Diluted
Income available to common stockholders plus assumed    exercises of stock options	$	99,372		33,314,298	$	2.98

Average Exercise Price of Options Excluded from Computation of Diluted Net Income Per Common Share

The following table shows the number and average exercise price of options that were excluded from the computation of diluted net income per common share for each period because the options were anti-dilutive for the period:

	Shares
Three Months Ended September 30, 2020		377,071
Three Months Ended September 30, 2019		164,696
Nine Months Ended September 30, 2020		408,867
Nine Months Ended September 30, 2019		174,489