Annual report pursuant to Section 13 and 15(d)

Financial Highlights - Schedule of Financial Highlights of the Company (Details)

v3.22.4
Financial Highlights - Schedule of Financial Highlights of the Company (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Net investment income before gains and losses per common share:          
Investment Company, Issuance of Shares, Per Share [1] $ 0.34 $ (0.08) $ 0.01 $ 0.20 $ 0.23
Net asset value at beginning of period [1] 11.22 11.26 10.55 9.90 9.96
Net investment income [1] 1.50 1.29 1.39 1.41 1.20
Total from investment operations [1] 0.81 1.50 2.02 1.71 0.85
Net increase (decrease) in net assets from capital share transactions [1] 0.34 (0.08) 0.01 0.20 0.23
Distributions of net investment income 1.97 1.55 1.38    
Stock-based compensation expense included in net investment income and other movements [1],[2] 0.15 0.09 0.07 0.07 0.12
Net asset value at end of period [1] 10.53 11.22 11.26 10.55 9.90
Ratios and supplemental data (in thousands, except per share data):          
Per share market value at end of period $ 13.22 $ 16.59 $ 14.42 $ 14.02 $ 11.05
Total return [3] (10.14%) 25.62% 14.31% 39.36% (7.56%)
Shares outstanding at end of period 133,045,000 116,619,000 114,726,000 107,364,000 96,501,000
Basic 125,189,000 114,742,000 111,985,000 101,132,000 90,929,000
Diluted 126,659,000 115,955,000 112,267,000    
Net assets at end of period $ (1,401,459) $ (1,308,547) $ (1,291,704) $ (1,133,049) $ (955,444)
Ratio of total expense to average net assets [4] 9.92% 9.86% 11.30% 11.95% 10.73%
Ratio of net investment income before investment gains and losses to average net assets [4] 13.96% 11.28% 13.64% 13.74% 11.78%
Portfolio turnover rate [5] 19.29% 51.58% 32.38% 31.30% 38.76%
Weighted average debt outstanding $ 1,468,335 $ 1,248,177 $ 1,309,903 $ 1,177,379 $ 826,931
Weighted average debt per common share $ 11.73 $ 10.88 $ 11.70 $ 11.64 $ 9.09
Ordinary Income [Member]          
Net investment income before gains and losses per common share:          
Distributions of net investment income [1],[6] 1.63 1.06 1.03 1.15 1.26
Capital Gains Member          
Net investment income before gains and losses per common share:          
Distributions of net investment income [1],[6] 0.36 0.49 0.36 0.18 0
Realized Gain Loss [Member]          
Net investment income before gains and losses per common share:          
Net realized gain (loss) [1] (0.01) 0.18 (0.50) 0.16 (0.12)
Unrealized Gain Loss Member          
Net investment income before gains and losses per common share:          
Net realized gain (loss) [1] $ (0.68) $ 0.03 $ 1.13 $ 0.14 $ (0.23)
[1] All per share activity is calculated based on the weighted average shares outstanding for the relevant period, except net increase (decrease) in net assets from capital share transactions, which is based on the common shares outstanding as of the relevant balance sheet date.
[2] Adjusts for the impact of stock-based compensation expense, which is a non-cash expense and has no net impact to net asset value. Pursuant to ASC Topic 718, the expense is offset by a corresponding increase in paid-in capital. Additionally, adjusts for other items attributed to the difference between certain per share data based on the weighted-average basic shares outstanding and those calculated using the shares outstanding as of a period end or transaction date.
[3] The total return for the years ended December 31, 2022, 2021, 2020, 2019, and 2018 equals to the change in the ending market value over the beginning of the period price per share plus distributions paid per share during the period, divided by the beginning price assuming the distribution is reinvested on the date of the distribution. As such, the total return is not annualized. The total return does not reflect any sales load that must be paid by investors.
[4] The ratios are calculated based on weighted average net assets for the relevant period and are annualized.
[5] The portfolio turnover rate for the years ended December 31, 2022, 2021, 2020, 2019, and 2018 equals to the lesser of investment portfolio purchases or sales during the period, divided by the average investment portfolio value during the period. As such, portfolio turnover rate is not annualized.
[6] Includes distributions on unvested restricted stock awards.