Contracts with customer assets acquired through business acquisitions.

No definition available.

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- Definition

Contracts with customer liabilities acquired through business acquisitions.

+ References

No definition available.

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- Definition

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

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

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-Publisher FASB
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- Definition

Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

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- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

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Revenues and Accounts Receivable - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Contracts assets acquired through business acquisitions		$ 6,500	$ 700
Contract liabilities acquired through business acquisitions		0	2,200
Contract with customer liabilities, revenue recognized		1,700
Revenue remaining performance obligations		24,400	13,000
Provision for bad debt		$ 4,532	$ 1,246
Remediation and Reuse Segment
Accounts Notes And Loans Receivable [Line Items]
Provision for bad debt	$ 2,100
Customer Concentration Risk \| Revenue \| Minimum
Accounts Notes And Loans Receivable [Line Items]
Concentration risk percentage		10.00%
Customer Concentration Risk \| Accounts Receivable \| Minimum
Accounts Notes And Loans Receivable [Line Items]
Concentration risk percentage			10.00%
Customer Concentration Risk \| Accounts Receivable \| One Customer
Accounts Notes And Loans Receivable [Line Items]
Concentration risk percentage		10.20%