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Stock-Based Compensation (Detail Textual) - USD ($) $ in Millions | 6 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Stock-based compensation related to restricted stock units | $ 14.5 | $ 12.0
2016 Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of shares authorized for grants | 1,200,000 |
Cumulative equity instruments awarded | 855,895 |
Cumulative equity instruments forfeited | 174,418 |
PRSUs |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Period to establish average share price for performance measurement | 90 days |
Average share price performance condition, percentage | 100.00% |
Maximum earned award, percentage of target award | 200.00% |
Percentage of earned award vesting after three years | 50.00% |
Percentage of earned award vesting after four years | 50.00% |
RSUs |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unrecognized compensation cost | $ 58.0 |
Weighted-average period to recognize unrecognized compensation cost (in years) | 2 years 9 months 18 days |

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