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Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Commitments to Extend Credit |  |
Letters of credit | $ 2,190,000 | $ 2,240,000
Allowance for unfunded credit commitments | 28,000 | 33,500
Accrued expenses and other liabilities |  |
Other Commitments |  |
Unfunded commitments for investments in AHP and other tax credit investments | 343,000 | 182,700
Single Family and Multi-family Residential Loans | Loans Sold or Securitized with Recourse | Loans Sold or Securitized With Recourse |  |
Commitments to Extend Credit |  |
Allowance for unfunded credit commitments | 45 | 88
Standby Letters of Credit |  |
Commitments to Extend Credit |  |
Letters of credit | 2,150,000 | 2,120,000
Commercial Letters of Credit |  |
Commitments to Extend Credit |  |
Letters of credit | $ 43,600 | $ 124,900

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- Definition Reflects the Allowance for Unfunded Credit Commitments + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
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Period Type: | instant

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- Details
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- Details
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- Details
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