Significant Accounting Policies Cash and Cash Equivalents (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash, customer funding	$ 271	$ 579
Compensating balance	511	302
Other Noncurrent Assets [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Deposits restricted cash		13,000
Other Current Assets [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Deposits restricted cash	$ 500	$ 13,665