Goodwill And Other Intangible Assets (Narrative) (Details) (USD $)	9 Months Ended
	Dec. 31, 2011	Mar. 31, 2011
Goodwill and Other Intangible Assets [Line Items]
Other intangible assets, net	$ 199,578,000	$ 197,168,000
Net, accumulated amortization of intangible assets	90,000,000	75,000,000
Intangible asset residual value	0
Estimated future amortization expense in 2012	5,900,000
Estimated future amortization expense in 2013	23,600,000
Estimated future amortization expense in 2014	21,200,000
Estimated future amortization expense in 2015	19,600,000
Estimated future amortization expense in 2016	18,200,000
Estimated future amortization expense thereafter	$ 111,100,000
Customer Relationships [Member]
Goodwill and Other Intangible Assets [Line Items]
Customer relationships estimated useful lives minimum (in years)	7
Customer relationships estimated useful lives maximum (in years)	17