Acquisitions (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounting Policies [Abstract]
Payments to Acquire Businesses, Net of Cash Acquired	$ 68,000	$ 0	$ 68,398

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration