Goodwill and Intangible Assets (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
GOODWILL
Goodwill. Gross	$ 64,778	$ 64,016
Goodwill attributable acquisitions	6,541	762
Goodwill, Gross	71,319	64,778	$ 64,016
Accumulated Impairment	(40,394)	(40,394)	(40,394)
Goodwill, net	30,925	24,384	23,622
Intangible assets subject to amortization:
Gross Carrying Amount	38,543	30,078
Accumulated Amortization	(16,266)	(12,511)
Net Carrying Amount	22,277	17,567
Total intangible assets
Gross Carrying Amount	38,543	30,116
Net Carrying Amount	22,277	17,605
Impairment of intangible assets	0	1,810	267
Aggregate amortization expense related to intangible assets	3,927	2,869	$ 2,667
Estimated future amortization expense related to intangible assets
2017	3,598
2018	3,406
2019	2,979
2020	2,890
2021	2,472
Thereafter	6,932
Net Carrying Amount	22,277	17,567
Licenses
Intangible assets not subject to amortization:
Carrying Amount	0	38
Trademarks/trade names/licenses
Intangible assets subject to amortization:
Gross Carrying Amount	13,904	12,470
Accumulated Amortization	(3,137)	(1,966)
Net Carrying Amount	$ 10,767	10,504
Weighted-Average Amortization Period	11 years
Estimated future amortization expense related to intangible assets
Net Carrying Amount	$ 10,767	10,504
Customer relationships/non-compete agreements
Intangible assets subject to amortization:
Gross Carrying Amount	23,867	16,836
Accumulated Amortization	(12,357)	(9,773)
Net Carrying Amount	$ 11,510	7,063
Weighted-Average Amortization Period	7 years
Estimated future amortization expense related to intangible assets
Net Carrying Amount	$ 11,510	7,063
Developed software and technology
Intangible assets subject to amortization:
Gross Carrying Amount	772	772
Accumulated Amortization	(772)	(772)
Net Carrying Amount	$ 0	0
Weighted-Average Amortization Period	5 years
Estimated future amortization expense related to intangible assets
Net Carrying Amount	$ 0	$ 0
Trade Names
Intangible assets subject to amortization:
Weighted-Average Amortization Period		10 years	15 years
Intangible assets not subject to amortization:
Carrying Amount		$ 8,727	$ 1,093
Total intangible assets
Impairment of intangible assets		1,810	267
Non-cash intangible asset impairment charge, after tax		$ 1,112	$ 168
Non-cash intangible asset impairment charge, per diluted share (in dollars per share)		$ 0.12	$ 0.02
Intangible assets reclassified from indefinite lives to definite lives		$ 6,917	$ 826