Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table presents the calculation of net earnings per common share (“EPS”) — basic and diluted (in thousands, except per share data): 

	Three months ended March 31,
	2019		2018
Net income	$	30,998	$	4,875
Weighted-average number of common shares outstanding (for basic calculation)	20,527		20,255
Dilutive securities	1,024		1,145
Weighted-average common and common equivalent shares outstanding (for diluted calculation)	21,551		21,400
EPS — basic	$	1.51	$	0.24
EPS — diluted	$	1.44	$	0.23