Note 7 - Accumulated Other Comprehensive Income - Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Balance	$ 949,627	$ 879,280	$ 846,935
Balance	1,079,061	949,627	879,280
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Balance	18,989	(5,542)	14,382
Other comprehensive income (loss) before reclassifications	18,108	24,531	(19,924)
Amounts reclassified from accumulated other comprehensive loss to income	(12,415)
Balance	24,682	18,989	(5,542)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(67,924)	(64,863)	(44,975)
Other comprehensive income (loss) before reclassifications	(1,572)	(3,061)	(19,888)
Amounts reclassified from accumulated other comprehensive loss to income
Balance	(69,496)	(67,924)	(64,863)
AOCI Attributable to Parent [Member]
Balance	(48,935)	(70,405)	(30,593)
Other comprehensive income (loss) before reclassifications	16,536	21,470	(39,812)
Amounts reclassified from accumulated other comprehensive loss to income	(12,415)
Balance	$ (44,814)	$ (48,935)	$ (70,405)