Note 11 - Status of Defined Benefit Plans - US Plan (Details) - US Plan [Member] - Scenario, Unspecified [Domain] - USD ($)	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Change in Benefit Obligations [Member]
Benefit obligation at beginning of year	$ 116,398,000	$ 110,054,000	$ 99,788,000	$ 104,537,000
Service cost		2,663,000	2,326,000	2,562,000
Interest cost		4,839,000	4,868,000	4,289,000
Benefits paid		(4,372,000)	(4,263,000)	(4,101,000)
Actuarial (gain) loss		3,214,000	7,335,000	(7,499,000)
Benefit obligation at end of year		116,398,000	110,054,000	99,788,000
Change in Plan Assets [Member]
Benefits paid		(4,372,000)	(4,263,000)	(4,101,000)
Fair value of plan assets at beginning of year	84,853,000	84,629,000	77,208,000	76,778,000
Actual return on plan assets		(274,000)	11,661,000	3,958,000
Employer contributions		4,870,000	23,000	573,000
Fair value of plan assets at end of year	$ 84,853,000	84,629,000	77,208,000	76,778,000	$ 84,853,000	$ 84,629,000	$ 77,208,000
Amounts Recongnized in Balance Sheet [Member]
Current liability					(37,000)	(37,000)	(33,000)
Noncurrent liability					(31,508,000)	(25,388,000)	(22,547,000)
Net amount recognized in balance sheet					$ (31,545,000)	$ (25,425,000)	$ (22,580,000)
Components of Net Periodic Benefit Cost [Member]
Service cost		2,663,000	2,326,000	2,562,000
Interest cost		4,839,000	4,868,000	4,289,000
Expected return on plan assets		(5,063,000)	(4,484,000)	(4,474,000)
Amortization of prior service cost		0	116,000	$ 234,000
Recognized actuarial loss		319,000	12,000
Net periodic benefit cost		$ 2,758,000	$ 2,838,000	$ 2,611,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate					4.49%	4.29%	4.96%
Rate of compensation increase					2.64%	2.64%	2.64%
Funded status at end of year					$ (31,545,000)	$ (25,425,000)	$ (22,580,000)
Net amount recognized in balance sheet					(31,545,000)	(25,425,000)	(22,580,000)
Discount rate		4.29%	4.96%	3.92%
Rate of compensation increase		2.64%	2.64%	2.64%
Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Expected Long Term Return on Assets		6.00%	6.00%	6.00%
Prior service cost					0	0	(116,000)
Accumulated loss					(11,817,000)	(3,585,000)	(3,438,000)
Amounts not yet recognized as a component of net periodic benefit cost					(11,817,000)	(3,585,000)	(3,554,000)
Accumulated net periodic benefit cost in excess of contributions					(19,728,000)	(21,840,000)	(19,026,000)
Prior service cost		$ 0	$ (30,000)	$ (127,000)
Recognized actuarial loss		$ (53,000)	$ 0	$ 0
Projected benefit obligation					116,398,000	110,054,000	99,788,000
Accumulated benefit obligation					109,383,000	103,155,000	93,066,000
Fair value of assets					$ 84,853,000	$ 84,629,000	$ 77,208,000