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Goodwill and Other Intangible Assets - Definite-lived Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Sep. 30, 2016
Finite-Lived Intangible Assets [Line Items]    
Carrying Amount $ 36,548 $ 31,257
Accumulated Amortization (17,663) (13,412)
Net Book Value 18,885 17,845
Real estate finders’ fees    
Finite-Lived Intangible Assets [Line Items]    
Carrying Amount 1,167 1,902
Accumulated Amortization (847) (796)
Net Book Value 320 1,106
Non-compete agreements    
Finite-Lived Intangible Assets [Line Items]    
Carrying Amount 3,659 3,581
Accumulated Amortization (3,102) (2,920)
Net Book Value 557 661
Favorable lease    
Finite-Lived Intangible Assets [Line Items]    
Carrying Amount 1,102 909
Accumulated Amortization (708) (637)
Net Book Value 394 272
Internally developed software    
Finite-Lived Intangible Assets [Line Items]    
Carrying Amount 29,741 23,503
Accumulated Amortization (12,597) (8,674)
Net Book Value 17,144 14,829
Other    
Finite-Lived Intangible Assets [Line Items]    
Carrying Amount 879 1,362
Accumulated Amortization (409) (385)
Net Book Value $ 470 $ 977