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Acquisitions - Unaudited Pro Forma Consolidated Financial Information (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Business Acquisition [Line Items]
Intangibles amortization	$ 7,854	$ 495	$ 22,358	$ 1,412
Stock based compensation			42,551	34,403
Car Offer
Business Acquisition [Line Items]
Intangibles amortization	7,286	7,275	21,836	21,825
Stock based compensation	$ 1,083	$ 1,083	$ 9,813	$ 9,628

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of noncash expense for share-based payment arrangement.

+ References

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-Topic 230
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