Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Weighted-average shares outstanding for basic and diluted net income per share
Net income (in dollars)	$ 7,302	$ 6,676	$ 21,979	$ 16,589
Basic net income per share:
Weighted-average shares outstanding - Basic	60,867	60,272	60,548	60,250
Basic net income per common share (in usd per share)	$ 0.12	$ 0.11	$ 0.36	$ 0.28
Diluted net income per share:
Weighted-average shares outstanding - Basic	60,867	60,272	60,548	60,250
Effect of potentially dilutive securities	412	583	642	563
Weighted-average shares outstanding - Diluted	61,279	60,855	61,190	60,813
Diluted net income per common share (in usd per share)	$ 0.12	$ 0.11	$ 0.36	$ 0.27