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Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financial Instrument [Line Items]
Estimated fair value of contingent liabilities	$ 0
Standby Letters of Credit
Financial Instrument [Line Items]
Fair value of contingent liability	1,075	$ 925
Performance Bonds
Financial Instrument [Line Items]
Fair value of contingent liability	$ 11,400	$ 10,500

X

- Definition

The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611

+ Details

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X

- Definition

The face amount of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

+ References

No definition available.

+ Details

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X

- Definition

Financial Instrument [Line Items]

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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