Earnings Per Common Share - Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income (loss)	$ 18,624	$ (9,629)
Net income/(loss) attributable to common shares	$ 18,624	$ (9,629)
Weighted average number of common shares outstanding — basic	45,462	44,955
Weighted average number of common shares outstanding — diluted	45,462	44,955
Net income/(loss) per common share — basic	$ 0.41	$ (0.21)
Net income/(loss) per common share — diluted	$ 0.41	$ (0.21)