Basis of Presentation (Stock Option Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Stock-based compensation expense			$ 3,855,000	$ 2,013,000
Stock-Based Awards
Unamortized stock-based compensation expense related to unvested stock awards	15,000,000		15,000,000
Weighted average period of recognition for unrecognized compensation costs (in years)			2 years 237 days
Tax benefit attributable to stock options exercised			0	0
Stock-based compensation expense	1,700,000	1,000,000	3,400,000	1,800,000
Employee Stock Purchase Plan
Unamortized stock-based compensation expense related to unvested stock awards	400,000		400,000
Weighted average period of recognition for unrecognized compensation costs (in years)			0 years 6 months
Tax benefit attributable to stock options exercised			0	0
Stock-based compensation expense	$ 300,000	$ 100,000	$ 500,000	$ 300,000