Unconsolidated Affiliated Company (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Unconsolidated Affiliated Company
Ownership percentage in equity method investee	50.00%								50.00%
Operations:
Total revenue									$ 10.7	$ 11.3	$ 13.7
Net income									3.2	2.4	3.8
The Company's equity in net income	$ 0.4	$ 0.2	$ 0.2	$ 0.8	$ 0.3	$ 0.1	$ 0.4	$ 0.4	1.6	1.2	$ 1.9
Financial Position:
Total assets	200.9				189.2				200.9	189.2
Total external borrowings	168.1				163.2				168.1	163.2
Total net assets	23.7				21.0				23.7	21.0
The Company's share of net assets	$ 11.9				$ 10.5				$ 11.9	$ 10.5