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 |