Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Weighted-average shares outstanding for basic and diluted net income per share
Net income (in dollars)	$ 10,486,000	$ 7,302,000	$ 13,826,000	$ 21,979,000
Basic net income per share:
Weighted-average shares outstanding - Basic	62,093	60,867	61,645	60,548
Basic net income per common share (in usd per share)	$ 0.17	$ 0.12	$ 0.22	$ 0.36
Diluted net income per share:
Weighted-average shares outstanding - Basic	62,093	60,867	61,645	60,548
Effect of potentially dilutive securities	0	412	255	642
Weighted-average shares outstanding - Diluted	62,093	61,279	61,900	61,190
Diluted net income per common share (in usd per share)	$ 0.17	$ 0.12	$ 0.22	$ 0.36