Note 4 - Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended March 31,
	2014			2013
Service cost	$	1,345		$	1,325
Interest cost		1,070			917
Expected return on plan assets		(1,094	)		(830	)
Loss amortization		252			742
Net periodic benefit cost	$	1,573		$	2,154