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Fair Value Measurements - Carrying Value and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total investment securities available for sale | $ 1,147,547 |
Financial Assets: |  |
Investment securities held to maturity | 636,257 | $ 673,434
Level 1 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total investment securities available for sale | 5,137 | 25,178
Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total investment securities available for sale | 1,142,410 | 1,306,265
Level 3 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total investment securities available for sale | 0 | 0
Carrying Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total investment securities available for sale | 1,147,547 | 1,331,443
Financial Assets: |  |
Cash and cash equivalents | 220,503 | 103,590
Investment securities held to maturity | 746,845 | 766,396
Loans held for sale | 263 |
Loans receivable, net | 4,219,911 | 4,007,872
Accrued interest receivable | 18,794 | 18,547
Equity security | 256 | 185
Financial Liabilities: |  |
Borrowings | 450,000 |
Securities sold under agreement to repurchase | 23,158 | 46,597
Junior subordinated debentures | 21,692 | 21,473
Accrued interest payable | 8,922 | 143
Carrying Value | Interest Rate Derivative Contracts |  |
Financial Assets: |  |
Derivative assets - interest rate swaps | 33,840 | 30,107
Financial Liabilities: |  |
Derivative liabilities - interest rate swaps | 33,840 | 30,107
Carrying Value | Non-maturity deposits |  |
Financial Liabilities: |  |
Non-maturity deposits | 5,006,581 | 5,617,267
Carrying Value | Certificates of deposit |  |
Financial Liabilities: |  |
Non-maturity deposits | 628,606 | 307,573
Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total investment securities available for sale | 1,147,547 | 1,331,443
Financial Assets: |  |
Cash and cash equivalents | 220,503 | 103,590
Investment securities held to maturity | 636,257 | 673,434
Loans held for sale | 268 |
Loans receivable, net | 4,072,296 | 3,841,821
Accrued interest receivable | 18,794 | 18,547
Equity security | 256 | 185
Financial Liabilities: |  |
Borrowings | 447,952 |
Securities sold under agreement to repurchase | 23,158 | 46,597
Junior subordinated debentures | 19,750 | 20,000
Accrued interest payable | 8,922 | 143
Fair Value | Interest Rate Derivative Contracts |  |
Financial Assets: |  |
Derivative assets - interest rate swaps | 33,840 | 30,107
Financial Liabilities: |  |
Derivative liabilities - interest rate swaps | 33,840 | 30,107
Fair Value | Non-maturity deposits |  |
Financial Liabilities: |  |
Non-maturity deposits | 5,006,581 | 5,617,267
Fair Value | Certificates of deposit |  |
Financial Liabilities: |  |
Non-maturity deposits | 637,048 | 308,325
Fair Value | Level 1 |  |
Financial Assets: |  |
Cash and cash equivalents | 220,503 | 103,590
Investment securities held to maturity | 0 | 0
Loans held for sale | 0 |
Loans receivable, net | 0 | 0
Accrued interest receivable | 271 | 349
Equity security | 256 | 185
Financial Liabilities: |  |
Borrowings | 0 |
Securities sold under agreement to repurchase | 23,158 | 46,597
Junior subordinated debentures | 0 | 0
Accrued interest payable | 65 | 57
Fair Value | Level 1 | Interest Rate Derivative Contracts |  |
Financial Assets: |  |
Derivative assets - interest rate swaps | 0 | 0
Financial Liabilities: |  |
Derivative liabilities - interest rate swaps | 0 | 0
Fair Value | Level 1 | Non-maturity deposits |  |
Financial Liabilities: |  |
Non-maturity deposits | 5,006,581 | 5,617,267
Fair Value | Level 1 | Certificates of deposit |  |
Financial Liabilities: |  |
Non-maturity deposits | 0 | 0
Fair Value | Level 2 |  |
Financial Assets: |  |
Cash and cash equivalents | 0 | 0
Investment securities held to maturity | 636,257 | 673,434
Loans held for sale | 268 |
Loans receivable, net | 0 | 0
Accrued interest receivable | 6,001 | 6,892
Equity security | 0 | 0
Financial Liabilities: |  |
Borrowings | 447,952 |
Securities sold under agreement to repurchase | 0 | 0
Junior subordinated debentures | 0 | 0
Accrued interest payable | 8,782 | 13
Fair Value | Level 2 | Interest Rate Derivative Contracts |  |
Financial Assets: |  |
Derivative assets - interest rate swaps | 33,840 | 30,107
Financial Liabilities: |  |
Derivative liabilities - interest rate swaps | 33,840 | 30,107
Fair Value | Level 2 | Non-maturity deposits |  |
Financial Liabilities: |  |
Non-maturity deposits | 0 | 0
Fair Value | Level 2 | Certificates of deposit |  |
Financial Liabilities: |  |
Non-maturity deposits | 637,048 | 308,325
Fair Value | Level 3 |  |
Financial Assets: |  |
Cash and cash equivalents | 0 | 0
Investment securities held to maturity | 0 | 0
Loans held for sale | 0 |
Loans receivable, net | 4,072,296 | 3,841,821
Accrued interest receivable | 12,522 | 11,306
Equity security | 0 | 0
Financial Liabilities: |  |
Borrowings | 0 |
Securities sold under agreement to repurchase | 0 | 0
Junior subordinated debentures | 19,750 | 20,000
Accrued interest payable | 75 | 73
Fair Value | Level 3 | Interest Rate Derivative Contracts |  |
Financial Assets: |  |
Derivative assets - interest rate swaps | 0 | 0
Financial Liabilities: |  |
Derivative liabilities - interest rate swaps | 0 | 0
Fair Value | Level 3 | Non-maturity deposits |  |
Financial Liabilities: |  |
Non-maturity deposits | 0 | 0
Fair Value | Level 3 | Certificates of deposit |  |
Financial Liabilities: |  |
Non-maturity deposits | $ 0 | $ 0

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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5A Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5 + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Publisher FASB -URI https://asc.fasb.org//310-10/tableOfContent + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date. + References No definition available. + Details
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