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Federal Home Loan Bank Advances - Summary of FHLB Advances (Detail) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Federal Home Loan Bank, Advances [Line Items] |  |
FHLB advances (fixed rates 0.45% to 4.96% and variable rates 0.06% to 0.09%) maturing June 2021 to January 2041 | $ 1,924,155 | $ 1,999,160
Fair value hedge basis adjustments and unamortized prepayment fees | (11,614) | (7,725)
Total | $ 1,912,541 | $ 1,991,435
Minimum | FHLB Advances |  |
Federal Home Loan Bank, Advances [Line Items] |  |
Fixed rate | 0.45% |
Variable rate | 0.06% |
Maximum | FHLB Advances |  |
Federal Home Loan Bank, Advances [Line Items] |  |
Fixed rate | 4.96% |
Variable rate | 0.09% |

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- Definition Advances From Federal Home Loan Banks, Fair Value Hedge Basis adjustments And Unamortized Prepayment Fees + References No definition available. + Details
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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64702-112823 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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