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Fair Value of Financial Instruments - Financial instruments Measured at Fair Value (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | $ 2,630,414 | $ 1,453,132 |
Individually evaluated loans |  | 36,281 | $ 25,202
Foreclosed properties | 3,071 | 2,424 |
Government-sponsored enterprise securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 69,179 | 70,206 |
Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 2,514,805 | 1,337,706 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring | Government-sponsored enterprise securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring | Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring | Corporate bonds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Nonrecurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Presold mortgages in process of settlement | 19,257 | 42,271 |
Individually evaluated loans | 0 |  |
Impaired loans |  | 0 |
Foreclosed properties | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Recurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 2,630,414 | 1,453,132 |
Significant Other Observable Inputs (Level 2) | Recurring | Government-sponsored enterprise securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 69,179 | 70,206 |
Significant Other Observable Inputs (Level 2) | Recurring | Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 2,514,805 | 1,337,706 |
Significant Other Observable Inputs (Level 2) | Recurring | Corporate bonds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 46,430 | 45,220 |
Significant Other Observable Inputs (Level 2) | Nonrecurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Presold mortgages in process of settlement | 0 | 0 |
Individually evaluated loans | 0 |  |
Impaired loans |  | 0 |
Foreclosed properties | 0 | 0 |
Significant Unobservable Inputs (Level 3) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Foreclosed properties | 364 | 1,484 |
Significant Unobservable Inputs (Level 3) | Recurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Recurring | Government-sponsored enterprise securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Recurring | Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Recurring | Corporate bonds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Nonrecurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Presold mortgages in process of settlement | 0 | 0 |
Individually evaluated loans | 11,583 |  |
Impaired loans |  | 22,142 |
Foreclosed properties | 364 | 1,484 |
Fair Value | Recurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 2,630,414 | 1,453,132 |
Fair Value | Recurring | Government-sponsored enterprise securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 69,179 | 70,206 |
Fair Value | Recurring | Mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 2,514,805 | 1,337,706 |
Fair Value | Recurring | Corporate bonds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities available for sale | 46,430 | 45,220 |
Fair Value | Nonrecurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Presold mortgages in process of settlement | 19,257 | 42,271 |
Individually evaluated loans | 11,583 |  |
Impaired loans |  | 22,142 |
Foreclosed properties | $ 364 | $ 1,484 |

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- Definition Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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