Stock Options (Tables)

6 Months Ended

Jun. 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	87,322		12.48
Options expired	2,188		10.40
Options forfeited	10,963		19.62
Options outstanding at June 30, 2017	700,029		20.32	5.98	$	10,311
Options fully vested and exercisable at June 30, 2017	255,860	$	18.78	5.03	$	4,162