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
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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-Section 30
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Name:	us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Acquisitions - Other Acquisitions (Details) $ in Thousands		3 Months Ended
Acquisitions - Other Acquisitions (Details) $ in Thousands	Apr. 01, 2019 USD ($)	Mar. 31, 2020 USD ($) item	Mar. 31, 2019 item
Acquisitions
Number of acquisitions \| item			1
Total purchase price		$ 1,600
Walker
Acquisitions
Total purchase price	$ 235,393
Starr
Acquisitions
Number of acquisitions \| item		1
Total purchase price		$ 41,100