Net Income Per Common Share (Tables)

6 Months Ended

Jun. 30, 2019

Basic and Diluted Net Income Per Common Share Based on Weighted-average Shares Outstanding

Basic and diluted net income per common share based on weighted-average shares outstanding are calculated as follows:

	Income (Numerator)		Shares (Denominator)		Per Share Amount
	(Dollars in thousands, except per share data)
Three Months Ended June 30, 2019
Basic
Income available to common stockholders	$	34,167		32,629,146	$	1.04
Dilutive effect of stock options		—		688,047
Diluted
Income available to common stockholders plus assumed exercises of stock options	$	34,167		33,317,193	$	1.02
Three Months Ended June 30, 2018
Basic
Income available to common stockholders	$	30,586		32,716,350	$	0.93
Dilutive effect of stock options		—		742,207
Diluted
Income available to common stockholders plus assumed exercises of stock options	$	30,586		33,458,557	$	0.91

Six Months Ended June 30, 2019
Basic
Income available to common stockholders	$	66,004		32,620,819	$	2.02
Dilutive effect of stock options		—		685,610
Diluted
Income available to common stockholders plus assumed exercises of stock options	$	66,004		33,306,429	$	1.98
Six Months Ended June 30, 2018
Basic
Income available to common stockholders	$	60,206		32,645,693	$	1.84
Dilutive effect of stock options		—		744,269
Diluted
Income available to common stockholders plus assumed exercises of stock options	$	60,206		33,389,962	$	1.80

Options Excluded From Computation of Diluted Net Income Per Common Share

The following table shows the number 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 June 30, 2019		158,500
Three Months Ended June 30, 2018		85,802
Six Months Ended June 30, 2019		169,301
Six Months Ended June 30, 2018		117,696