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Note 12 - Retirement Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
UNITED STATES    
Service cost $ 1 $ 1
Interest cost 2,586 2,520
Expected return on plan assets (3,385) (3,354)
Recognized net actuarial loss 1,030 1,145
Amortization of prior service cost
Net periodic benefit cost 232 312
Foreign Plan [Member]    
Service cost 9 9
Interest cost 254 254
Expected return on plan assets (228) (231)
Recognized net actuarial loss 86 229
Amortization of prior service cost (8)
Net periodic benefit cost $ 121 $ 253