Note 12 - Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2017

Compensation Related Costs [Abstract]

Schedule of Shares Issued

Year ended December 31,	2017		2016		2015
Shares		2,660		2,932		3,186
Price per share	$31.95 and $36.18		$26.73 and $28.35		$25.20 and $26.73