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Fair Value - Summary of Assets Measured at Fair Value (Detail) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Disclosure Of Other Real Estate Owned Measured At Fair Value On A Recurring And Nonrecurring Basis Table [Line Items] |  |  |
Loans held for sale | $ 144,111 | $ 148,209 | [1]
OREO | 227 | 0 | [1]
Fair Value, Nonrecurring [Member] |  |  |
Disclosure Of Other Real Estate Owned Measured At Fair Value On A Recurring And Nonrecurring Basis Table [Line Items] |  |  |
Impaired loans, net | 8,233 | 2,187 |
Loans held for sale | 144,111 | 148,209 |
OREO | 227 |  |
Fair Value, Nonrecurring [Member] | Level 2 [Member] |  |  |
Disclosure Of Other Real Estate Owned Measured At Fair Value On A Recurring And Nonrecurring Basis Table [Line Items] |  |  |
Loans held for sale | 144,111 | 148,209 |
Fair Value, Nonrecurring [Member] | Level 3 [Member] |  |  |
Disclosure Of Other Real Estate Owned Measured At Fair Value On A Recurring And Nonrecurring Basis Table [Line Items] |  |  |
Impaired loans, net | 8,233 | $ 2,187 |
OREO | $ 227 |  |
[1] | Derived from audited December 31, 2020 Consolidated Financial Statements.

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