Restricted Cash (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2016	Oct. 31, 2015
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash and cash equivalents	$ 37,300	$ 26,900
Restricted cash and cash equivalents - long-term	30,905	20,600
Reserves for obligations	$ 10,000
Letter of Credit Date of Expiration	Apr. 01, 2019
Letters of Credit Outstanding, Amount	$ 8,700	$ 8,700
Dominion Bridgeport FuelCell Park [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash and cash equivalents - long-term	$ 15,000
Debt Instrument, Term	15 years