Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Weighted-average shares outstanding for basic and diluted net income per share
Net income (in dollars)	$ 5,163	$ 12,945
Basic net income per share:
Weighted-average shares outstanding - Basic	60,230	59,559
Basic net income per common share (in usd per share)	$ 0.09	$ 0.22
Diluted net income per share:
Weighted-average shares outstanding - Basic	60,230	59,559
Effect of potentially dilutive securities	540	13
Weighted-average shares outstanding - Diluted	60,770	59,572
Diluted net income per common share (in usd per share)	$ 0.08	$ 0.22