Fair Value Measurements - Summary of Carrying Value and Estimated Fair Value of all Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Carrying Value
Fair value measurement
Long term debt	$ 173,797	$ 189,307
Fair Value
Fair value measurement
Long term debt	210,024	178,181
Non-recurring basis | Carrying Value | Level 2 | 3.75% Convertible Notes Due 2022
Fair value measurement
Long term debt	2,712	76,398
Non-recurring basis | Carrying Value | Level 2 | 3.75% Convertible Notes Due 2026
Fair value measurement
Long term debt	72,388
Non-recurring basis | Fair Value | Level 2 | 3.75% Convertible Notes Due 2022
Fair value measurement
Long term debt	3,164	65,272
Non-recurring basis | Fair Value | Level 2 | 3.75% Convertible Notes Due 2026
Fair value measurement
Long term debt	108,163
New Term Loan Facility | Non-recurring basis | Carrying Value | Level 2
Fair value measurement
Long term debt	78,697	84,908
New Term Loan Facility | Non-recurring basis | Fair Value | Level 2
Fair value measurement
Long term debt	78,697	84,908
New Revolving Credit Facility | Non-recurring basis | Carrying Value | Level 2
Fair value measurement
Long term debt	20,000	28,001
New Revolving Credit Facility | Non-recurring basis | Fair Value | Level 2
Fair value measurement
Long term debt	$ 20,000	$ 28,001