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SUMMARY OF SIGNIFICANT ACOUNTING POLICIES - Dividends Declared (FY) (Details) - $ / shares | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Accounting Policies [Abstract] |  |  |  |  |  |
Ordinary income (In USD Per Share) |  |  |  |  | $ 0 | $ 0.3825
Non-taxable distribution (In USD Per Share) |  |  |  |  | 1.4600 | 1.7280
Total (in usd per share) | $ 0.2625 | $ 0.4080 | $ 0.5250 | $ 0.9330 | $ 1.4600 | $ 2.1105

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- Definition Aggregate dividends declared which is non-taxable during the period for each share ofcommon stock. + References No definition available. + Details
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- Definition Aggregate dividends declared on ordinary income during the period for each share of common stock. + References No definition available. + Details
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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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