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Restructuring Charges (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Sep. 30, 2011	Sep. 30, 2011
Restructuring Charges (Textual) [Abstract]
Restructuring charges	$ (40)	$ 873
April 2011 Restructuring Program [Member]
Restructuring Charges (Textual) [Abstract]
Number of positions eliminated or relocated under restructuring program	25	25
April 2011 Restructuring Program [Member] \| Employee Severances [Member]
Restructuring Charges (Textual) [Abstract]
Restructuring charges	$ 900	$ 900

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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