Fair Value Measurements (Schedule Of Fair Value Hierarchy For Financial Assets And Liabilities Measured On Recurring Basis) (Details) (USD $)	Jun. 30, 2012		Mar. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-qualified deferred compensation investment	$ 1,397,451		$ 1,327,806
Fair Value Measurements On Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds	232,592	[1]	227,987
Equities			4,796
Asset backed securities	2,607		2,671
Total assets	235,199		235,454
Fair Value Measurements On Recurring Basis [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds	232,592	[1]	227,987
Equities			4,796
Total assets	232,592		232,783
Fair Value Measurements On Recurring Basis [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equities
Asset backed securities	2,607		2,671
Total assets	2,607		2,671
Fair Value Measurements On Recurring Basis [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds		[1]
Equities
Asset backed securities
Total assets
Securities Sold, Not yet Purchased [Member] | Fair Value Measurements On Recurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds	11,705		286
Asset backed securities			7,900
Total liabilities	11,705		8,186
Securities Sold, Not yet Purchased [Member] | Fair Value Measurements On Recurring Basis [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds	11,705		286
Asset backed securities			7,900
Total liabilities	11,705		8,186
Securities Sold, Not yet Purchased [Member] | Fair Value Measurements On Recurring Basis [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset backed securities
Securities Sold, Not yet Purchased [Member] | Fair Value Measurements On Recurring Basis [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds
Asset backed securities
Total liabilities
Non-qualified Deferred Compensation Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-qualified deferred compensation investment	$ 11,499

[1] The asset mutual funds has a mutual fund with a fair value of $11,499 included in the non-qualified deferred compensation investment.