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Income Taxes (Details) (USD $)	12 Months Ended		6 Months Ended
Income Taxes (Details) (USD $)	Mar. 31, 2013 item	Mar. 31, 2012	Sep. 30, 2010 NGL Supply
Income Taxes
Minimum percentage of qualifying income of non-taxable subsidiaries	90.00%
Number of taxable corporate subsidiaries in United States	2
Number of Canadian subsidiaries	3
Income Taxes
Income tax benefit	$ (1,875,000)	$ (601,000)	$ 1,417,000
U.S. federal statutory rate (as a percent)			35.00%
Uncertain tax positions	$ 0	$ 0

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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