Note 15 - Net Income Per Share and Common Stock Dividends (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

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

(In thousands, except per share data)	2017		2016		2015
Net income, basic and diluted	$	38,043	$	41,027	$	37,187
Average shares outstanding, basic		22,532		22,356		22,088
Effect of dilutive securities		451		436		371
Average shares outstanding including dilutive securities		22,983		22,792		22,459
Net income per share, basic	$	1.69	$	1.84	$	1.68
Net income per share, diluted	$	1.66	$	1.80	$	1.65