Geographic Information - Schedule of Long-Lived Assets by Geographical Areas (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 30, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 139,420	$ 144,977
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	82,589	88,304
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	52,122	52,292
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 4,709	$ 4,381