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						9 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018
Earnings per share — Basic:
Net income	$ 4,415	$ 6,081	$ 1,244	$ 4,824	$ 13,094	$ 2,648	$ 11,740	$ 20,566
Weighted-average shares outstanding — Basic	65,493			64,637			65,304	64,308
Net income per common share — Basic	$ 0.07			$ 0.07			$ 0.18	$ 0.32
Earnings per share — Diluted:
Net income	$ 4,415	$ 6,081	$ 1,244	$ 4,824	$ 13,094	$ 2,648	$ 11,740	$ 20,566
Weighted-average shares outstanding — Basic	65,493			64,637			65,304	64,308
Effect of potentially dilutive securities	171			139			212	191
Weighted-average shares outstanding — Diluted	65,664			64,776			65,516	64,499
Net income per common share — Diluted	$ 0.07			$ 0.07			$ 0.18	$ 0.32