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FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS - Summary of Advances from the FHLB (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Fixed rate: |  |
Outstanding balance | $ 888,000 | $ 730,000
Variable rate: |  |
Outstanding balance | $ 90,000 | $ 465,000
Weighted average interest rate (percent) | 0.21% | 1.66%
Minimum |  |
Fixed rate: |  |
Interest rate (percent) | 0.56% | 1.82%
Maximum |  |
Fixed rate: |  |
Interest rate (percent) | 3.32% | 3.32%
Weighted average (percent) |  |
Fixed rate: |  |
Interest rate (percent) | 2.24% | 2.66%

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