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Restructuring and Asset Impairment Charges Restructuring and Asset Impairment Charges (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Restructuring Reserve [Roll Forward]
Beginning balance	$ 1,960	$ 6,193
Severance charges	0	738
Other cash charges	0	31
Total period charges	0	769
Payments through June 30	(555)	(1,742)
Ending balance June 30	1,405	5,220
Total restructuring and asset impairment charges for the period	$ 0	$ 769

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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