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Mortgage Loans on Real Estate (Narrative) (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 USD ($) portfolio_segment | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) portfolio_segment loans | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($) loans
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Number of portfolio segments that make up financing receivables | portfolio_segment | 2 |  | 2 |  |
Commitments outstanding | $ 106,100 |  | $ 106,100 |  |
Allowance for credit loss, economic factors forecast period, years |  |  | 2 years |  |
Real estate owned | 0 | $ 0 | $ 0 | $ 0 |
Non-accrual loans | 0 |  | 0 |  | $ 0
Interest income recognized on non-accrual loans | 0 | $ 0 | $ 0 | $ 0 |
Financing receivable, modifications, period of time of delaying principal and/or interest |  |  | 3 months |  |
Number of TDRs | loans |  |  | 0 |  | 0
Minimum |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Number of days past due, delinquent status |  |  | 60 days |  |
Number of days past due, non-accrual status |  |  | 90 days |  |
Commercial Mortgage Loans |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Accrued interest receivable written off | 0 |  | $ 0 |  |
Collateral dependent loans | 0 |  | 0 |  | $ 0
Residential Mortgage Loans |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Accrued interest receivable written off | 0 |  | 0 |  |
Collateral dependent loans | $ 0 |  | $ 0 |  | $ 0

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- Definition Number of days past due for loans to be considered delinquent. + References No definition available. + Details
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- Definition Number of years economic factors are forecasted. + References No definition available. + Details
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- Definition Mortgage loans on real estate at the reporting date that are not performing and will probably be satisfied by taking ownership of the real estate serving as collateral. + References No definition available. + Details
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- Definition Amount of undisbursed portion of financing receivable balance. Excludes financing receivable covered under loss sharing agreement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5066-111524 + Details
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