Note 12 - Employee Benefit and Retirement Plans - Status of Defined Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Jun. 30, 2015
Employer contributions	$ 5,000	$ 4,482	$ 6,049
Benefits paid	(6,902)	(6,590)	(6,524)
Fair value of plan assets at end of year	115,015	115,015	122,787	$ 117,778		$ 115,015	$ 122,787
Benefits paid	(6,902)	(6,590)	(6,524)
Exchange rate changes	(637)	(5,890)	(3,128)
Fair value of plan assets at end of year	117,778	115,015	122,787
Funded status at end of year				(51,918)		(60,218)	(43,402)
Current liability				(63)		(45)	(37)
Noncurrent liability				(51,855)		(60,173)	(43,365)
Prior service cost
Accumulated loss				(12,131)		(17,849)	(16,795)
Amounts not yet recognized as a component of net periodic benefit cost				(12,131)		(17,849)	(16,795)
Accumulated net periodic benefit cost in excess of contributions				(39,787)		(42,369)	(26,607)
Net amount recognized in balance sheet				(51,918)		(60,218)	(43,402)
Expected return on plan assets	(5,173)	(6,268)	(6,966)
Recognized actuarial loss	107	17,878	1,309
Net periodic benefit cost	2,585	21,399	3,824
Prior service cost
Net loss				(26)		(114)	(53)
Projected benefit obligation				169,696		175,233	166,189
Accumulated benefit obligation				169,696		168,119	159,174
Fair value of assets				$ 117,779		115,015	122,787
Benefit obligation at beginning of year	175,233	166,189	161,062
Service cost	1,405	2,757	2,663
Interest cost	6,246	7,032	6,818
Plan curtailment	(4,170)
Exchange rate changes	(909)	(7,825)	(4,167)
Benefits paid	(6,902)	(6,590)	(6,524)
Actuarial (gain) loss	(1,207)	13,670	6,337
Benefit obligation at end of year	169,696	175,233	166,189
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate				4.31%	3.77%
Fair value of plan assets at beginning of year	115,015	122,787	122,924
Actual return on plan assets	5,302	226	3,466
UNITED STATES
Employer contributions	4,045	3,380	4,870
Benefits paid	(5,106)	(4,593)	(4,372)
Fair value of plan assets at end of year	81,910	81,910	84,853	$ 81,928		81,910	84,853
Benefits paid	(5,106)	(4,593)	(4,372)
Fair value of plan assets at end of year	$ 81,928	$ 81,910	$ 84,853
Funded status at end of year				(42,210)		(48,953)	(31,545)
Current liability				(63)		(45)	(37)
Noncurrent liability				(42,147)		(48,908)	(31,508)
Discount rate	3.77%	4.49%	4.29%
Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Expected Long Term Return on Assets	5.00%	5.50%	6.00%
Prior service cost
Accumulated loss				(8,254)		(13,412)	(11,817)
Amounts not yet recognized as a component of net periodic benefit cost				(8,254)		(13,412)	(11,817)
Accumulated net periodic benefit cost in excess of contributions				(33,956)		(35,541)	(19,728)
Net amount recognized in balance sheet				(42,210)		(48,953)	(31,545)
Expected return on plan assets	$ (4,046)	$ (4,589)	$ (5,063)
Recognized actuarial loss	107	15,779	319
Net periodic benefit cost	2,460	19,195	2,758
Prior service cost
Net loss				(26)		(114)	(53)
Projected benefit obligation				124,138		130,863	116,398
Accumulated benefit obligation				124,138		123,749	109,383
Fair value of assets				$ 81,928		$ 81,910	$ 84,853
Benefit obligation at beginning of year	130,863	116,398	110,054
Service cost	1,405	2,757	2,663
Interest cost	4,994	5,248	4,839
Plan curtailment	(4,170)
Benefits paid	(5,106)	(4,593)	(4,372)
Actuarial (gain) loss	(3,848)	11,053	3,214
Benefit obligation at end of year	124,138	130,863	116,398
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate				3.92%		3.77%	4.49%
Fair value of plan assets at beginning of year	81,910	84,853	84,629
Actual return on plan assets	1,079	(1,730)	(274)
UNITED KINGDOM
Employer contributions	954	1,102	1,179
Benefits paid	(1,796)	(1,997)	(2,152)
Fair value of plan assets at end of year	33,105	33,105	37,934	$ 35,850		$ 33,105	$ 37,934
Benefits paid	(1,796)	(1,997)	(2,152)
Exchange rate changes	(636)	(5,890)	(3,128)
Fair value of plan assets at end of year	$ 35,850	$ 33,105	$ 37,934
Funded status at end of year				(9,708)		(11,265)	(11,857)
Noncurrent liability				(9,708)		(11,265)	(11,857)
Discount rate	3.00%	3.90%	4.30%
Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Expected Long Term Return on Assets	3.59%	4.77%	5.45%
Prior service cost
Accumulated loss				(3,877)		(4,437)	(4,978)
Amounts not yet recognized as a component of net periodic benefit cost				(3,877)		(4,437)	(4,978)
Accumulated net periodic benefit cost in excess of contributions				(5,831)		(6,828)	(6,879)
Net amount recognized in balance sheet				(9,708)		(11,265)	(11,857)
Expected return on plan assets	(1,127)	(1,679)	(1,903)
Amortization of net loss		2,099	990
Net periodic benefit cost	125	2,204	1,066
Projected benefit obligation				45,558		44,370	49,791
Accumulated benefit obligation				45,558		44,370	49,791
Fair value of assets				$ 35,851		$ 33,104	$ 37,934
Benefit obligation at beginning of year	44,370	49,791	51,008
Service cost
Interest cost	1,252	1,784	1,979
Exchange rate changes	(909)	(7,825)	(4,167)
Benefits paid	(1,796)	(1,997)	(2,152)
Actuarial (gain) loss	2,641	2,617	3,123
Benefit obligation at end of year	45,558	44,370	49,791
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate				2.73%		3.00%	3.90%
Fair value of plan assets at beginning of year	33,105	37,934	38,295
Actual return on plan assets	$ 4,223	$ 1,956	$ 3,740