Note 5 - Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2016

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2016			2015			2016			2015
Service cost	$	-		$	1,405		$	-		$	3,116
Interest cost		1,185			3,194			2,369			4,448
Expected return on plan assets		(1,298	)		(3,710	)		(2,595	)		(5,114	)
Loss amortization		153			900			306			1,740
Net periodic cost	$	40		$	1,789		$	80		$	4,190