Project Assets - Additional Information (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Jan. 31, 2019 USD ($) ProjectAsset	Oct. 31, 2018 USD ($) ProjectAsset
Project Assets [Abstract]
Long-term project assets	$ 109,819	$ 99,600
Number of project assets | ProjectAsset	5	5
Sale leaseback transaction, net book value	$ 27,200	$ 28,600
Long-term project assets construction in progress	$ 82,600	$ 71,000