Equity Method Investments (Details) (USD $)	3 Months Ended		6 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013	Oct. 31, 2013	Jul. 01, 2013	Jun. 30, 2013
Schedule Of Equity Method Investments [Line Items]
Contributions to equity method investments			$ 18,600,000	$ 8,748,000
Cardinal Pipeline Company [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage	21.49%		21.49%
Related Party Transaction Expenses From Transactions With Related Party	2,164,000	2,155,000	4,404,000	4,294,000
Due To Related Parties Current	727,000		727,000		755,000
Pine Needle Company [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage	45.00%		45.00%			45.00%	40.00%
Additional Equity Method Ownership Percentage Acquired						5.00%
Related Party Transaction Expenses From Transactions With Related Party	2,701,000	2,730,000	5,494,000	5,516,000
Due To Related Parties Current	910,000		910,000		940,000
South Star Energy Services [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage	15.00%		15.00%
Due From Related Parties Current	539,000		539,000		441,000
Revenue from Related Parties	475,000	592,000	907,000	583,000
Hardy Storage [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage	50.00%		50.00%
Related Party Transaction Expenses From Transactions With Related Party	2,392,000	2,425,000	4,817,000	4,851,000
Due To Related Parties Current	774,000		774,000		808,000
Constitution Pipeline Company [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage	24.00%		24.00%
Contributions to equity method investments	8,600,000		18,600,000
Estimated Pipeline Development And Construction Costs	680,000,000		680,000,000
Total Contributions To Equity Method Investments For Project	$ 34,500,000		$ 34,500,000