3. Income per share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Computation for Basic and Diluted Income Per Share

(1)	Three months EndedMarch 31,
(2)	2019		2018
	(in thousands, except per share amounts)
Net income	$	9,438	$	8,487
Weighted average basic shares outstanding		1,853		1,852
Add: Effect of dilutive securities		9		4
Weighted average diluted shares outstanding		1,862		1,856
Earnings per share:
Basic	$	5.09	$	4.58
Diluted	$	5.07	$	4.57