Note 12 - Status of Defined Benefit Plans - US Plan (Details) - US Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Change in Benefit Obligations [Member]
Benefit obligation at beginning of year	$ 130,863	$ 116,398	$ 110,054	$ 99,788
Service cost		2,757	2,663	2,326
Interest cost		5,248	4,839	4,868
Benefits paid		(4,593)	(4,372)	(4,263)
Actuarial (gain) loss		11,053	3,214	7,335
Benefit obligation at end of year		130,863	116,398	110,054
Change in Plan Assets [Member]
Benefits paid		(4,593)	(4,372)	(4,263)
Fair value of plan assets at beginning of year	81,910	84,853	84,629	77,208
Actual return on plan assets		(1,730)	(274)	11,661
Employer contributions		3,380	4,870	23
Fair value of plan assets at end of year	$ 81,910	84,853	84,629	77,208	$ 81,910	$ 84,853	$ 84,629
Amounts Recongnized in Balance Sheet [Member]
Current liability					(45)	(37)	(37)
Noncurrent liability					(48,908)	(31,508)	(25,388)
Net amount recognized in balance sheet					$ (48,953)	$ (31,545)	$ (25,425)
Components of Net Periodic Benefit Cost [Member]
Service cost		2,757	2,663	2,326
Interest cost		5,248	4,839	4,868
Expected return on plan assets		(4,589)	(5,063)	(4,484)
Amortization of prior service cost				116
Recognized actuarial loss		15,779	319	12
Net periodic benefit cost		$ 19,195	$ 2,758	$ 2,838
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate					3.77%	4.49%	4.29%
Funded status at end of year					$ (48,953)	$ (31,545)	$ (25,425)
Net amount recognized in balance sheet					(48,953)	(31,545)	(25,425)
Discount rate		4.49%	4.29%	4.96%
Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Expected Long Term Return on Assets		5.50%	6.00%	6.00%
Prior service cost
Accumulated loss					(13,412)	(11,817)	(3,585)
Amounts not yet recognized as a component of net periodic benefit cost					(13,412)	(11,817)	(3,585)
Accumulated net periodic benefit cost in excess of contributions					(35,541)	(19,728)	(21,840)
Prior service cost				$ (30)
Recognized actuarial loss		$ (114)	$ (53)
Projected benefit obligation					130,863	116,398	110,054
Accumulated benefit obligation					123,749	109,383	103,155
Fair value of assets					$ 81,910	$ 84,853	$ 84,629