Earnings Per Share - Schedule of Reconciliation of Basic Shares to Diluted Shares (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended					9 Months Ended		12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020
Numerator:
Net income (loss) - basic and diluted	$ 5,798	$ 20,941	$ (28,052)	$ 12,812	$ (11,283)	$ 37,902	$ (26,523)	$ (18,316)
Weighted average common shares outstanding - basic	37,825		36,509			37,664	36,315
Dilutive effect of restricted stock awards	1,471					1,471
Weighted average common shares outstanding - diluted	39,296		36,509			39,135	36,315
Net income (loss) per common share:
Basic	$ 0.15	$ 0.56	$ (0.77)	$ 0.35	$ (0.31)	$ 1.01	$ (0.73)	$ (0.50)
Diluted	$ 0.15	$ 0.53	$ (0.77)	$ 0.34	$ (0.31)	$ 0.97	$ (0.73)	$ (0.50)