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Restructuring and Asset Impairment Charges Restructuring and Asset Impairment Charges (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Restructuring Reserve [Roll Forward]
Beginning balance	$ 1,144	$ 1,405	$ 668	$ 1,960
Severance charges	580	0	1,212	0
Total period charges	580	0	1,212	0
Payments through September 30	(676)	(229)	(832)	(784)
Ending balance	1,048	1,176	1,048	1,176
Asset Impairment Charges	0	0	1,564	0
Total restructuring and asset impairment charges for the period	$ 580	$ 0	$ 2,776	$ 0

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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- Definition

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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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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