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Leases - Summary of Company's Leases (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	[1]
Leases [Abstract]
Lease liabilities	$ 7,990	$ 5,506
Right-of-use asset	$ 6,805	$ 5,328
Weighted average remaining lease term (years)	6 years 2 months 19 days
Weighted average discount rate	2.94%
[1] Derived from audited December 31, 2020 Consolidated Financial Statements.

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
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Amount of lessee's right to use underlying asset under operating lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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Weighted average discount rate for operating lease calculated at point in time.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 4
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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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