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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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BUSINESS ACQUISITIONS - Total Consideration Transferred and Aggregate Amount of Assets Acquired and Liabilities Assumed for 2020 Acquisitions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 261,767	$ 194,052	$ 194,052
2020 Acquisitions
Business Acquisition [Line Items]
Cash payments	115,247
Fair value of stock issued (1,480,909 shares)	29,367
Future consideration	13,428
Total consideration	158,042
Cash	1
Accounts Receivable	20,204
Inventory	8,567
Other Current Assets	190
Property and equipment	1,811
Goodwill	104,150
Other assets	696
Assets acquired	175,416
Current liabilities assumed	(10,674)
Deferred tax liability	(6,700)
Net assets acquired	158,042
2020 Acquisitions \| Non-compete agreements
Business Acquisition [Line Items]
Finite-lived intangibles	2,332
2020 Acquisitions \| Customer relationships
Business Acquisition [Line Items]
Finite-lived intangibles	$ 37,465
2020 Acquisitions \| Common Stock
Business Acquisition [Line Items]
Stock issued (in shares)	1,480,909