Property, Plant and Equipment (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2016 USD ($) equipment	Sep. 30, 2015 USD ($) equipment	Sep. 30, 2014 USD ($)
Property, plant and equipment, net
Property, plant and equipment, gross	$ 163,725	$ 151,358
Less accumulated depreciation and amortization	(80,677)	(73,713)
Property, plant and equipment, net	$ 83,048	$ 77,645
Number of equipment under capital leases | equipment	0	0
Depreciation and amortization of property, plant and equipment	$ 10,281	$ 9,896	$ 8,801
Land
Property, plant and equipment, net
Property, plant and equipment, gross	$ 10,080	8,987
Buildings
Property, plant and equipment, net
Estimated Useful Life	30 years
Property, plant and equipment, gross	$ 81,004	74,214
Leasehold improvements
Property, plant and equipment, net
Property, plant and equipment, gross	$ 3,507	3,326
Leasehold improvements | Minimum
Property, plant and equipment, net
Estimated Useful Life	1 year
Leasehold improvements | Maximum
Property, plant and equipment, net
Estimated Useful Life	5 years
Furniture, fixtures and equipment
Property, plant and equipment, net
Property, plant and equipment, gross	$ 69,134	$ 64,831
Furniture, fixtures and equipment | Minimum
Property, plant and equipment, net
Estimated Useful Life	2 years
Furniture, fixtures and equipment | Maximum
Property, plant and equipment, net
Estimated Useful Life	7 years