Stock Options (Tables)

9 Months Ended

Sep. 30, 2017

Stock Options

Summary of option activity under stock option plans

				Weighted
		Weighted		average
		average		remaining	Aggregate
	Number of	exercise		contractual	intrinsic
	options	price		term (years)	value ($)
					(in Thousands)
Options outstanding at December 31, 2016	800,502	$	19.43
Plus: Options granted	—		—
Less:
Options exercised	92,934		12.72
Options expired	2,188		10.40
Options forfeited	15,238		20.30
Options outstanding at September 30, 2017	690,142		20.34	5.75	$	13,637
Options fully vested and exercisable at September 30, 2017	256,801	$	18.92	4.88	$	5,439