Fair Value Measurements - Summary of Carrying Value and Estimated Fair Value of all Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021
Carrying Value
Fair value measurement
Long term debt	$ 197,809	$ 173,797
Fair Value
Fair value measurement
Long term debt	202,131	210,024
Non-recurring basis | Carrying Value | Level 2 | 3.75% Convertible Notes Due 2022
Fair value measurement
Long term debt	2,844	2,712
Non-recurring basis | Carrying Value | Level 2 | 3.75% Convertible Notes Due 2026
Fair value measurement
Long term debt	97,209	72,388
Non-recurring basis | Fair Value | Level 2 | 3.75% Convertible Notes Due 2022
Fair value measurement
Long term debt	3,019	3,164
Non-recurring basis | Fair Value | Level 2 | 3.75% Convertible Notes Due 2026
Fair value measurement
Long term debt	101,356	108,163
New Term Loan Facility | Non-recurring basis | Carrying Value | Level 2
Fair value measurement
Long term debt	77,756	78,697
New Term Loan Facility | Non-recurring basis | Fair Value | Level 2
Fair value measurement
Long term debt	77,756	78,697
New Revolving Credit Facility | Non-recurring basis | Carrying Value | Level 2
Fair value measurement
Long term debt	20,000	20,000
New Revolving Credit Facility | Non-recurring basis | Fair Value | Level 2
Fair value measurement
Long term debt	$ 20,000	$ 20,000