Earnings Per Share - Weighted Average Shares Outstanding for Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings per share — Basic:
Net income (loss)	$ (6,771)	$ 2,848	$ 10,455	$ (824)	$ (3,923)	$ 9,631
Weighted-average shares outstanding — Basic	67,406		66,688		67,291	66,493
Net income (loss) per common share — Basic	$ (0.10)		$ 0.16		$ (0.06)	$ 0.14
Earnings per share — Diluted:
Net income (loss)	$ (6,771)	$ 2,848	$ 10,455	$ (824)	$ (3,923)	$ 9,631
Weighted-average shares outstanding — Basic	67,406		66,688		67,291	66,493
Effect of potentially dilutive securities			1
Weighted-average shares outstanding — Diluted	67,406		66,689		67,291	66,493
Net income (loss) per common share — Diluted	$ (0.10)		$ 0.16		$ (0.06)	$ 0.14