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FHLB Advances, Other Borrowings and Junior Subordinated Notes FHLB Borrowings (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Line of Credit Facility [Line Items] |  |
Junior subordinated notes and other borrowings | $ 429,229 | $ 329,429
Loans pledged as collateral for Federal Home Loan Bank advances and unused available credit | 644,600 | 507,600
FHLB advances and other borrowings |  |
Line of Credit Facility [Line Items] |  |
Federal Home Loan Bank line of credit maximum available | 644,600 |
Federal Home Loan Bank unused line remaining | 250,100 |
FHLB advances and other borrowings |  |
Line of Credit Facility [Line Items] |  |
Junior subordinated notes and other borrowings | $ 394,500 | $ 295,000
FHLB advances and other borrowings | Minimum |  |
Line of Credit Facility [Line Items] |  |
Fixed rate | 0.00% | 0.92%
FHLB advances and other borrowings | Maximum |  |
Line of Credit Facility [Line Items] |  |
Fixed rate | 2.75% | 2.75%

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- Definition The carrying amount, as of the date of the latest financial statement presented, of loans receivable which are owned but transferred to serve as collateral for the payment of FHLB debt obligations, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 + Details
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