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Allowance for credit losses - Troubled debt restructuring according to their accruing status - Subnote (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable |  |
Aggregated unpaid principal balance |  | $ 1,223,205
Mortgages |  |
Financing Receivable |  |
Aggregated unpaid principal balance |  | 624,368
Mortgages | Guaranteed by us sponsored entities |  |
Financing Receivable |  |
Aggregated unpaid principal balance | $ 655,000 | $ 625,000

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- Definition Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
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- Details
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