Equity Method Investments and Other Investments - Equity Method Investment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Equity Method Investment, Summarized Financial Information, Balance Sheets [Abstract]
Current assets	$ 59,507	$ 43,201
Non-current assets	15,461	12,657
Current liabilities	25,320	15,551
Non-current liabilities	19,933	13,581
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Total revenue	74,659	48,047	$ 48,702
Gross profit (loss)	27,355	16,327	16,510
Income (loss) from continuing operations	6,731	(1,074)	1,745
Net income (loss)	$ 2,374	$ (2,452)	$ 1,636