Equity (Details 5) (NGL Supply, Inc., USD $)	0 Months Ended		1 Months Ended	6 Months Ended	12 Months Ended
	Oct. 14, 2010	May 17, 2010	Jun. 30, 2010	Sep. 30, 2010	Mar. 31, 2010
NGL Supply, Inc.
Equity
Redeemable preferred stock authorized (in shares)					1,000
Class A common stock authorized (in shares)					100,000
Par value of Class A common stock (in dollars per share)					$ 10
Stock options exercised (in shares)				650
Total consideration of stock options exercised				$ 1,400,000
Changes in net equity
BALANCES	36,811,000			46,403,000
Collection of stock options receivable	1,430,000
Net tax obligations of NGL Supply not assumed by the Partnership	3,120,000
Distribution to previous shareholders	(40,000,000)
Other	(109,000)
BALANCES	1,252,000			36,811,000	46,403,000
Redeemable Preferred Stock
Series A Preferred Stock outstanding					1,000
Redemption price per share (in dollars per share)					$ 3,000
Period of notice required for redemption of preferred shares					30 days
Accrued dividend of preferred stock		3,000,000
Common Stock Dividends
Common stock dividend paid			$ 7,000,000	$ 7,000,000