Note 6 - Accumulated Other Comprehensive Income - Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Beginning balance			$ 949,627
Other comprehensive income (loss)	$ (7,058)	$ (3,288)	(7,882)	$ 3,185
Ending balance	997,819		997,819
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Beginning balance			18,989
Other comprehensive income (loss)			(16,374)
Ending balance	2,615		2,615
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Beginning balance			(67,924)
Other comprehensive income (loss)			8,492
Ending balance	(59,432)		(59,432)
AOCI Attributable to Parent [Member]
Beginning balance			(48,935)
Other comprehensive income (loss)			(7,882)
Ending balance	$ (56,817)		$ (56,817)