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Earnings Per Share and Equity Transactions - Narrative (Details) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 05, 2021 shares | Dec. 01, 2020 $ / shares | Dec. 31, 2021 shares | Dec. 31, 2020 $ / shares shares | Dec. 31, 2019 shares | Aug. 04, 2021 shares
Tender Offer Event [Line Items] |  |  |  |  |  |
Reverse stock split ratio | 0.1 |  |  |  |  |
Common stock, number of shares outstanding (in shares) | 71,261,403 |  | 67,344,374 | 71,998,654 |  | 712,090,283
Additional shares issued (in shares) | 52,375 |  |  |  |  |
Common Stock |  |  |  |  |  |
Tender Offer Event [Line Items] |  |  |  |  |  |
Purchase price (usd per share) | $ / shares |  | $ 21.70 |  | $ 2.355 |  |
Stock repurchase program, discount percentage |  | 25.00% |  |  |  |
Net asset value (usd per share) | $ / shares |  | $ 28.90 |  |  |  |
Repurchase of common stock (in shares) |  |  | 755,643 | 213,612 | 851,760 |
Issuance of common stock under dividend reinvestment plan (in shares) |  |  |  | 7,904 |  |

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- Definition Net asset value per share or per unit of investments in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes fair value disclosure. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 35 -Paragraph 54B -URI http://asc.fasb.org/extlink&oid=122636397&loc=SL7495116-110257 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 205 -Section 50 -Paragraph 7 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=25866437&loc=d3e10246-115837 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 205 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25866437&loc=d3e10246-115837 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=123874694&loc=SL6742756-110258 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 35 -Paragraph 59 -URI http://asc.fasb.org/extlink&oid=122636397&loc=SL6740821-110257 + Details
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