Summary Of Accounting Policies (Schedule Of Goodwill) (Details) (USD $)	9 Months Ended
	Dec. 31, 2011		Dec. 31, 2010
Summary Of Accounting Policies [Abstract]
Balance, beginning of the year	$ 93,207,000
Acquisitions	8,607,000	[1]
Purchase accounting adjustments	592,000	[2]
Foreign currency translation adjustments	(1,113,000)
Balance, end of the quarter	101,293,000
Aggregate cash paid for acquisitions	$ 93,700,000		$ 9,100,000

[1] The amount is attributable to certain acquisitions that were not individually, nor in the aggregate, significant to the Company. The aggregate consideration paid for these acquisitions was approximately $93.7 million, net of cash acquired.

[2] The amount is attributable to purchase accounting adjustments for historical acquisitions that were not significant to the Company individually or in the aggregate. The adjustments are based on management's estimates from review of the valuation of assets and liabilities completed in a period subsequent to the respective acquisition. The effects of the adjustments, had they been made at time of acquisition, would not have had a significant impact on the balance sheet, statement of operations, or statement of cash flows for the periods subsequent to that date.