3. Income per share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Computation for Basic and Diluted Income Per Share

		Three Months Ended September 30,				Nine Months Ended September 30,
		2016		2015			2016		2015
	(in thousands, except per share amounts)
Net income		$	7,614	$	7,799		$	22,010	$	22,875
Weighted average basic shares outstanding			1,825		1,836			1,823		1,853
Add: Effect of dilutive securities			33		24			33		23
Weighted average diluted shares outstanding			1,858		1,860			1,856		1,876
Earnings per share:
Basic		$	4.17	$	4.25		$	12.07	$	12.34
Diluted		$	4.10	$	4.19		$	11.86	$	12.19