Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Income Tax [Line Items]
Unrecognized tax benefits that would impact effective tax rate	$ 4,400,000
Liability where a significant change in unrecognized tax benefits is reasonably possible	1,800,000
Reduction in liability for uncertain tax positions	66,000	698,000	12,765,000
Net (reversal) expense for interest and penalties	(1,600,000)	400,000	(200,000)
Unrecognized tax benefits, income tax penalties and interest accrued	2,700,000	4,500,000
Tax Paid [Member]
Income Tax [Line Items]
Reduction in liability for uncertain tax positions			5,700,000
Income Tax Expense [Member]
Income Tax [Line Items]
Reduction in liability for uncertain tax positions			$ 7,100,000
U.S. Federal [Member]
Income Tax [Line Items]
Open tax years	3/31/2010
Minimum [Member] | State And Foreign Jurisdictions [Member]
Income Tax [Line Items]
Open tax years	3 years
Maximum [Member] | State And Foreign Jurisdictions [Member]
Income Tax [Line Items]
Open tax years	6 years