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Note 11 - Retirement Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
United States Pension Plan of US Entity [Member]        
Service cost $ 1 $ 16 $ 2 $ 34
Interest cost 2,613 2,873 5,226 5,745
Expected return on plan assets (3,440) (3,465) (6,881) (6,932)
Recognized net actuarial loss 1,190 995 2,381 1,990
Amortization of prior service cost 3 7
Net periodic benefit cost 364 422 728 844
Foreign Pension Plan [Member]        
Service cost 9 8 19 17
Interest cost 250 363 514 734
Expected return on plan assets (282) (330) (579) (667)
Recognized net actuarial loss 249 213 511 430
Amortization of prior service cost (12) (12) (24) (24)
Net periodic benefit cost $ 214 $ 242 $ 441 $ 490