Note 8 - Supplemental Equity and Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands |
9 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
Dec. 31, 2020 |
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| Balance | $ 1,165,589 | $ 1,079,061 | $ 1,323,348 | |||||||
| Reclassification of loss on derivatives to interest expense, net of taxes (3) | (1,600) | 0 | ||||||||
| Balance | 1,291,268 | 1,146,266 | ||||||||
| Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | ||||||||||
| Balance | (9,537) | |||||||||
| Other comprehensive income (loss), net of tax before reclassifications | (6,413) | (5,769) | ||||||||
| Reclassification of loss on derivatives to interest expense, net of taxes (3) | [1] | 1,614 | ||||||||
| Balance | [2] | 0 | ||||||||
| Balance | [1] | (14,336) | [3] | (5,769) | ||||||
| Accumulated Foreign Currency Adjustment Attributable to Parent [Member] | ||||||||||
| Balance | (73,983) | |||||||||
| Other comprehensive income (loss), net of tax before reclassifications | (15,138) | (4,368) | ||||||||
| Reclassification of loss on derivatives to interest expense, net of taxes (3) | [1] | 0 | ||||||||
| Balance | [2] | (69,496) | ||||||||
| Balance | [1] | (89,121) | [3] | (73,864) | ||||||
| AOCI Attributable to Parent [Member] | ||||||||||
| Balance | (83,521) | (44,814) | $ (78,352) | |||||||
| Other comprehensive income (loss), net of tax before reclassifications | (21,551) | (10,137) | ||||||||
| Reclassification of loss on derivatives to interest expense, net of taxes (3) | [1] | 1,614 | ||||||||
| Balance | [2] | (69,496) | ||||||||
| Balance | [1] | $ (103,458) | [3] | $ (79,633) | ||||||
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