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Stock-Based Compensation (Detail Textual) - USD ($) $ in Millions | 3 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Stock-based compensation related to restricted stock units | $ 7.0 | $ 5.7
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 | $ 31.8 |
Weighted-average period to recognize unrecognized compensation cost (in years) | 2 years 4 months 24 days |
2006 Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Stock incentive plan, expiration period | 10 years |
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 | 716,480 |
Cumulative equity instruments forfeited | 145,189 |

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- Definition Average share price performance condition, percentage by which the average share price of the Company’s stock in years one, two and three exceeds the average share price at the grant date. + References No definition available. + Details
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