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Loans Receivable Held for Sale (FY) (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018
Loans Receivable Held for Sale [Abstract] |  |  |  |
Loans receivable held for sale | $ 40,653 |  | $ 0 | $ 6,231
Transfers of loans receivable held for investment to loans receivable held for sale | 0 | $ 10,684 | 10,684 | 0
Transfers of loans receivable held for sale to loans receivable held for investment | 0 | 1,064 | 9,227 | 16,871
Loans originated for sale | 118,626 | 15,182 | 15,182 | 20,288
Gain on sale of loans | 199 | 204 | 204 | 70
Loan repayments | $ 530 | $ 103 |  |
Multi-family Loans [Member] |  |  |  |
Loans Receivable Held for Sale [Abstract] |  |  |  |
Loans receivable held for sale |  |  | 0 | 6,200
Transfers of loans receivable held for investment to loans receivable held for sale |  |  | 10,700 |
Transfers of loans receivable held for sale to loans receivable held for investment |  |  | 9,200 | 16,900
Loans originated for sale |  |  | $ 15,200 | $ 20,200
Loans originated for sale, percentage |  |  | 15.00% | 20.00%
Loans held for sale, sold during period |  |  | $ 22,800 | $ 19,300
Gain on sale of loans |  |  | 204 | 70
Loan repayments |  |  | $ 115 | $ 159

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- Definition Loans held-for-sale including, but not limited to, mortgage loans and finance receivables during period. + References No definition available. + Details
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- Definition Percentage of loans origination of mortgages that are held for sale. + References No definition available. + Details
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- Definition The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans and leases that were sold during the reporting period. This element refers to the gain (loss) and not to the cash proceeds of the sales. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- Definition Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=120238483&loc=d3e48678-111004 + Details
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- Definition The amount of cash paid for the origination of mortgages that are held for sale. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3461-108585 + Details
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- Definition The cash inflow from collection of repayments from borrowers on loans that are held with the intention to resell in the near future; includes mortgages and other types of loans. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 16 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3337-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3461-108585 + Details
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- Definition Value of loans held-for-sale transferred to loans held in the entity's portfolio in noncash transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4313-108586 + Details
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