Note 7 - Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2016

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended March 31,
	2016			2015
Service cost	$	1,077		$	1,054
Interest cost		1,307			1,206
Expected return on plan assets		(1,325	)		(1,345	)
Amortization of prior service benefit		(84	)		(84	)
Amortization of net loss		1,093			1,065
Net periodic benefit cost	$	2,068		$	1,896