Note 8 - Supplemental Equity and Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands  | 
3 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
Sep. 30, 2019  | 
Sep. 30, 2018  | 
|||||||
| Balance | $ 1,165,589 | $ 1,079,061 | ||||||
| Balance | 1,174,224 | 1,109,469 | ||||||
| AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] | ||||||||
| Balance | (9,537) | 0 | [1] | |||||
| Other comprehensive income (loss), net of tax before reclassifications | (504) | 0 | ||||||
| Balance | (10,041) | [2] | 0 | |||||
| Accumulated Foreign Currency Adjustment Attributable to Parent [Member] | ||||||||
| Balance | (73,983) | (69,496) | [1] | |||||
| Other comprehensive income (loss), net of tax before reclassifications | (7,602) | (1,136) | ||||||
| Balance | (81,585) | [2] | (70,632) | |||||
| Accumulated Other Comprehensive Income (Loss), Derivative Qualifying as Hedge, Excluded Component, Including Portion Attributable to Noncontrolling Interest [Member] | ||||||||
| Balance | (83,521) | (69,496) | [1] | |||||
| Other comprehensive income (loss), net of tax before reclassifications | (8,106) | (1,136) | ||||||
| Balance | $ (91,627) | [2] | $ (70,632) | |||||
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