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Borrowings (Bank Of America Credit Facility) (Narrative) (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 07, 2020 | Mar. 06, 2020 | Mar. 31, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |  |
Contractual facility |  |  | $ 248,072 | $ 300,449
Bank Of America Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Contractual facility |  | $ 55,000 | $ 55,000 | $ 55,000
Maturity date |  | Mar. 06, 2023 | Mar. 06, 2023 | Mar. 06, 2023
Bank Of America Credit Facility [Member] | Eurodollar [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over LIBOR | 3.00% |  |  |
Bank Of America Credit Facility [Member] | Floor Rate [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over LIBOR | 1.00% |  |  |
Minimum [Member] | Bank Of America Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 2.50% |  |
Maximum [Member] | Bank Of America Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate |  | 3.00% |  |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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