Note 7 - Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	For the Three Months Ended						For the Six Months Ended
(in thousands)	June 30 , 201 8			July 1 , 201 7			June 30 , 201 8			July 1 , 201 7
Components of net periodic benefit cost:
Service cost	$	533		$	408		$	1,066		$	816
Interest cost		501			360			1,002			720
Expected return on plan assets		(540	)		(476	)		(1,080	)		(952	)
Amortization of prior service (credit)		74			84			148			168
Net periodic benefit cost	$	568		$	376		$	1,136		$	752