Acquisitions - Other Acquisitions (Details) $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2019 item	Mar. 31, 2019 item	Sep. 30, 2018 item	Jun. 30, 2018 item	Mar. 31, 2018 item	Sep. 30, 2019 USD ($)
Acquisitions
Number of acquisitions	1	1	2	3	2
Total purchase price \| $						$ 2.6
Number of acquisitions reported as separate operating location			1

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
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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
-Topic 805
-SubTopic 30
-Section 30
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