Income Taxes (Unrecognized Net Income Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Beginning unrecognized net income tax benefits	$ 16,467	$ 14,146
Additions for current year tax positions	3,054	2,419
Additions for tax positions of prior years	151	969
Reductions for tax positions of prior years	(1,448)	(1,067)
Reductions for settlements with taxing authorities	0	0
Reductions as a result of expiration of applicable statutes of limitations	0	0
Ending unrecognized net income tax benefits	$ 18,224	$ 16,467