| Note 7 - 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, 2020 | Sep. 30, 2019 | |||||
| Balance | $ 1,381,192 | $ 1,165,589 | ||||
| Balance | 1,439,285 | 1,174,224 | ||||
| AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] | ||||||
| Balance | (13,253) | (9,537) | ||||
| Other comprehensive income (loss) before reclassifications, net of taxes | 11 | (504) | ||||
| Reclassification from loss on derivatives to interest expense, net of taxes(1) | [1] | 2,132 | ||||
| Balance | [2] | (11,110) | (10,041) | |||
| Accumulated Foreign Currency Adjustment Attributable to Parent [Member] | ||||||
| Balance | (83,946) | (73,983) | ||||
| Other comprehensive income (loss) before reclassifications, net of taxes | 11,914 | (7,602) | ||||
| Reclassification from loss on derivatives to interest expense, net of taxes(1) | [1] | |||||
| Balance | [2] | (72,032) | (81,585) | |||
| Accumulated Other Comprehensive Income (Loss), Derivative Qualifying as Hedge, Excluded Component, Including Portion Attributable to Noncontrolling Interest [Member] | ||||||
| Balance | (97,199) | (83,521) | ||||
| Other comprehensive income (loss) before reclassifications, net of taxes | 11,925 | (8,106) | ||||
| Reclassification from loss on derivatives to interest expense, net of taxes(1) | [1] | 2,132 | ||||
| Balance | [2] | $ (83,142) | $ (91,627) | |||
| 
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