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Fair Value Measurements - Estimated Fair Values of Company's Financial Instruments (Detail) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
FINANCIAL ASSETS |  |
Federal funds sold, Carrying Amount | $ 3,489 | $ 800
Debt securities held for investment, Carrying Amount | 2,917 | 2,977
Loans, net of allowance for credit losses, Carrying Amount | 6,407,101 | 6,085,506
Debt securities held for investment, Fair Value | 2,917 | 2,978
Loans held for sale, Fair Value | 10,137 | 24,776
FINANCIAL LIABILITIES |  |
Deposits, Carrying Amount | 11,250,971 | 8,091,914
Short-term borrowings, Carrying Amount | 3,300 | 0
Subordinated debt, Carrying Amount | 86,001 | 85,987
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS |  |
Loan commitments, Fair Value | 3,958 | 3,648
Letters of credit, Fair Value | 522 | 621
Level 2 Inputs [Member] |  |
FINANCIAL ASSETS |  |
Cash and cash equivalents, Carrying Amount | 4,091,404 | 2,050,022
Federal funds sold, Carrying Amount | 3,489 | 800
Debt securities held for investment, Carrying Amount | 27 | 32
Loans held for sale, Carrying Amount | 10,137 | 24,776
Cash and cash equivalents, Fair Value | 4,091,404 | 2,050,022
Federal funds sold, Fair Value | 3,489 | 800
Debt securities held for investment, Fair Value | 27 | 33
Loans held for sale, Fair Value | 10,137 | 24,776
FINANCIAL LIABILITIES |  |
Deposits, Carrying Amount | 11,250,971 | 8,091,914
Short-term borrowings, Carrying Amount | 3,300 |
Subordinated debt, Carrying Amount | 86,001 | 85,987
Deposits, Fair Value | 11,258,118 | 8,161,553
Short-term borrowings, Fair Value | 3,300 |
Subordinated debt, Fair Value | 85,736 | 90,391
Level 3 Inputs [Member] |  |
FINANCIAL ASSETS |  |
Debt securities held for investment, Carrying Amount | 2,890 | 2,945
Loans, net of allowance for credit losses, Carrying Amount | 6,407,101 | 6,085,506
Debt securities held for investment, Fair Value | 2,890 | 2,945
Loans, net of allowance for credit losses, Fair Value | $ 6,276,465 | $ 6,059,716

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The amount outstanding of funds lent to other depository institutions, securities brokers, or securities dealers in the form of Federal Funds sold; for example, immediately available funds lent under agreements or contracts that mature in one business day or roll over under a continuing contract, regardless of the nature of the transaction or the collateral involved, excluding overnight lending for commercial and industrial purposes. Also include Federal Funds sold under agreements to resell on a gross basis, excluding (1) sales of term Federal Funds, (2) due bills representing purchases of securities or other assets by the reporting bank that have not yet been delivered and similar instruments, (3) resale agreements that mature in more than one business day involving assets other than securities, and (4) yield maintenance dollar repurchase agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.3) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27232-111563 + Details
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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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