Fair Value Measurements (Details 3) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Derivatives, Fair Value [Line Items]
Unrealized gains on interest rate swaps	$ 3,542	$ 1,201
Unrealized losses on interest rate swaps	0	1,791
Contingent consideration liabilities	$ 1,431	$ 1,924

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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