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Debt - Narrative (Details) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 13, 2022 USD ($) | Aug. 31, 2020 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Aug. 31, 2023 USD ($)
Debt Conversion [Line Items] |  |  |  |  |  |
Loans pledged to the FHLB |  |  | $ 1,674,096,000 | $ 1,630,939,000 |  |
Total borrowing capacity with the FHLB |  |  | 1,192,022,000 | 1,139,356,000 |  |
Additional borrowing availability with the FHLB |  |  | 706,367,000 |  |  |
Convertible notes payable, net |  |  | 0 | 5,355,000 |  |
Amortization of issuance costs on subordinated debt |  |  | 147,000 | $ 145,000 | $ 93,000 |
Trust preferred securities, aggregate liquidation valuation amount |  |  | 419,000 |  |  |
Trust Preferred Securities | New Mexico Banquest Capital Trust I (NMBCT I) |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |
Debt instrument, face amount |  |  | 9,279,000 |  |  |
Trust Preferred Securities | New Mexico Banquest Capital Trust II (NMBCT II) |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 4,640,000 |  |  |
LIBOR | Trust Preferred Securities | New Mexico Banquest Capital Trust I (NMBCT I) |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |
Interest rate margin on variable rate basis |  |  | 3.35% |  |  |
Rate |  |  | 8.94% | 7.02% |  |
LIBOR | Trust Preferred Securities | New Mexico Banquest Capital Trust II (NMBCT II) |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |
Interest rate margin on variable rate basis |  |  | 2.00% |  |  |
Rate |  |  | 7.64% | 6.69% |  |
Convertible Notes Payable | Convertible Debt |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |
Convertible notes payable, net |  |  |  | $ 5,456,000 |  | $ 5,456,000
Debt instrument, interest rate |  |  |  |  |  | 3.29%
Convertible debt, conversion ratio |  |  | 0.0156717 |  |  |
Amortization of debt discount |  |  | $ 101,000 | 1,131,000 | 746,000 |
Subordinated Notes Due July 1, 2030 | Subordinated Debt |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |
Debt instrument, face amount |  | $ 40,000,000 |  |  |  |
Debt instrument, interest rate |  | 6.00% |  |  |  |
Debt, non-redeemable period |  | 5 years |  |  |  |
Costs related to the issuance of the subordinated notes |  | $ 933,000 | 608,000 |  |  |
Amortization of issuance costs on subordinated debt |  |  | 93,000 | 94,000 | 93,000 |
Subordinated Notes Due July 1, 2030 | Subordinated Debt | SOFR |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |
Interest rate margin on variable rate basis |  | 5.89% |  |  |  |
Subordinated Notes Due January 15, 2032 | Subordinated Debt |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |
Debt instrument, face amount | $ 25,000,000 |  |  |  |  |
Debt instrument, interest rate | 3.375% |  |  |  |  |
Debt, non-redeemable period | 5 years |  |  |  |  |
Costs related to the issuance of the subordinated notes | $ 534,000 |  | 429,000 |  |  |
Amortization of issuance costs on subordinated debt |  |  | 54,000 | 51,000 |  |
Subordinated Notes Due January 15, 2032 | Subordinated Debt | SOFR |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |
Interest rate margin on variable rate basis | 2.03% |  |  |  |  |
Subordinated Debt related to Trust Preferred Securities | Subordinated Debt |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |
Debt instrument, face amount |  |  | 13,919,000 |  |  |
Debt discount on the convertible notes |  |  | 4,293,000 |  |  |
Amortization of debt discount |  |  | 286,000 | $ 254,000 | $ 256,000 |
Costs related to the issuance of the subordinated notes |  |  | 2,570,000 |  |  |
Line of Credit | Other Financial Institutions |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  | 110,000,000 |  |  |
Line of credit outstanding |  |  | 0 |  |  |
Line of Credit | Federal Reserve Bank stock |  |  |  |  |  |
Debt Conversion [Line Items] |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  | $ 2,028,410,000 |  |  |

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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-1A Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-3 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D + Details
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