Segment Information - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Revenue recognition
Increase (decrease) in operating income	$ (4,101)	$ (8,077)
Net income (loss)	$ (2,868)	$ (5,414)
Increase (decrease) in net income per common share (in dollars per share)	$ (0.11)	$ (0.20)
Unallocated corporate expenses and other
Revenue recognition
Expense related to the development of ERP system	$ 8,700	$ 6,500
Increase (decrease) in operating income	(12,900)	(8,500)
Gain (loss) from sale of real estate	400
Change in estimated total costs | Adjustment
Revenue recognition
Increase (decrease) in operating income	(6,400)	(2,400)
Net income (loss)	$ (3,900)	$ (1,500)
Increase (decrease) in net income per common share (in dollars per share)	$ (0.14)	$ (0.06)