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Restricted Cash	3 Months Ended
	Jan. 31, 2017
Restricted Cash and Investments [Abstract]
Restricted cash	Restricted Cash As of January 31, 2017, there was $43.6 million of restricted cash and cash equivalents pledged as collateral for letters of credit for certain banking requirements and contractual commitments, compared to $34.1 million of restricted cash and cash equivalents pledged as of October 31, 2016. The restricted cash balance for both periods presented includes $15.0 million which has been placed in a Grantor's Trust account to secure certain obligations under a 15-year service agreement and has been classified as long-term. The restricted cash balance as of January 31, 2017 also includes $17.6 million to support obligations related to PNC Energy Capital, LLC sale-leaseback transactions. As of January 31, 2017 and October 31, 2016, outstanding letters of credit totaled $7.9 million. These expire on various dates through April 2019.

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- Definition

The entire disclosure for assets that are restricted in their use, generally by contractual agreements or regulatory requirements. This would include, but not limited to, a description of the restricted assets and the terms of the restriction.

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