Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Weighted-average shares outstanding for basic and diluted net income per share
Net income (in dollars)	$ 6,362	$ 5,163
Basic net income per share:
Weighted-average shares outstanding - Basic	60,312	60,230
Basic net income per common share (in usd per share)	$ 0.11	$ 0.09
Diluted net income per share:
Weighted-average shares outstanding - Basic	60,312	60,230
Effect of potentially dilutive securities	752	540
Weighted-average shares outstanding - Diluted	61,064	60,770
Diluted net income per common share (in usd per share)	$ 0.10	$ 0.08