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Fair Value Measurements - Unobservable Inputs (Details) - Contingent Consideration [Member] - Fair Value, Inputs, Level 3 [Member]
$ in Thousands
9 Months Ended
Jun. 30, 2017
USD ($)
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]  
Fair Value Beginning Balance $ 1,100
Issuances 732
Settlements (535)
Adjustments to Fair Value 50
Fair Value Ending Balance $ 1,347