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Borrowings - Additional Information (Details)

3 Months Ended

12 Months Ended

Nov. 18, 2022

USD ($)

Jun. 23, 2021

USD ($)

Jun. 09, 2021

USD ($)

Apr. 30, 2021

USD ($)

Dec. 18, 2019

USD ($)

Jul. 18, 2019

USD ($)

Mar. 31, 2021

USD ($)

Sep. 30, 2017

USD ($)

Dec. 31, 2023

USD ($)

CoverageTest

Dec. 31, 2022

USD ($)

Dec. 31, 2021

USD ($)

Jun. 30, 2022

USD ($)

Apr. 29, 2022

Jul. 23, 2021

USD ($)

Jun. 24, 2021

USD ($)

Dec. 31, 2020

USD ($)

Oct. 28, 2020

USD ($)

Dec. 31, 2019

USD ($)

Debt Instrument [Line Items]

Weighted average stated interest rate on debt outstanding

7.00%

6.10%

Weighted average maturity on debt outstanding

3 years 8 months 12 days

5 years

Principal amount of borrowings

$ 91,225,000

$ 90,893,000

Gain (Loss) on Extinguishment of Debt

$ 900,000

$ (362,000)

$ (1,835,000)

Maximum | GLPRF LLC Member

Debt Instrument [Line Items]

Effective interest

2.85%

SOFR | Minimum | GLPRF LLC Member

Debt Instrument [Line Items]

Effective interest

2.80%

CLO Facility | GARS Acquisition

Debt Instrument [Line Items]

Aggregate principal amount

$ 420,000,000

Discount amortized over the remaining term

2,400,000

Great Lakes Portman Ridge Funding LLC Revolving Credit Facility

Debt Instrument [Line Items]

Weighted average stated interest rate on debt outstanding

7.84%

4.53%

3.03%

Aggregate principal amount

$ 92,000,000

$ 92,000,000

$ 80,571,000

$ 49,321,000

$ 79,571,000

Unamortized debt offering costs

775,000

1,107,000

Percentage of minimum commitments utilization requirement

80.00%

Percentage of average daily unborrowed portion of financing commitments

0.50%

Initial principal amount

$ 115,000,000

Line of Credit Facility, Maximum Borrowing Capacity

$ 215,000,000

Principal amount of borrowings

92,000,000

Great Lakes Portman Ridge Funding LLC Revolving Credit Facility | Level III

Debt Instrument [Line Items]

Fair value of borrowings

$ 91,200,000

$ 90,900,000

Unsecured Debt

Debt Instrument [Line Items]

Debt instrument, redemption price, percentage

100.00%

2018-2 Secured Notes Class B-R Notes

Debt Instrument [Line Items]

Aggregate principal amount

18,300,000

Stated Maturity

Nov. 20, 2029

^[1]

Nov. 20, 2029

^[2]

2018-2 Secured Notes Class A-1R-R Notes

Debt Instrument [Line Items]

Aggregate principal amount

$ 50,000,000

Drew Amount

$ 14,300,000

Unfunded Amount

$ 25,000,000

Stated Maturity

Nov. 20, 2029

^[1]

Nov. 20, 2029

^[2]

Debt Instrument redemption, amount

$ 25,000,000

Class A-R Notes

Debt Instrument [Line Items]

Percentage of aggregate amount of interest payable for first coverage test

135.00%

Percentage of aggregate outstanding principal amount

128.00%

Class A-R Notes and B-R Notes

Debt Instrument [Line Items]

Percentage of aggregate amount of interest payable for first coverage test

125.00%

Percentage of aggregate outstanding principal amount

118.20%

Class A-1R-R and Class A-1T-R Notes

Debt Instrument [Line Items]

Percentage of capitalization

125.00%

4.875% Notes Due 2026

Debt Instrument [Line Items]

Weighted average stated interest rate on debt outstanding

4.88%

4.88%

4.88%

Debt instrument, issuance date

Apr. 30, 2021

Interest rate

4.875%

Debt discount

$ 2,430,000

$ 1,225,000

$ 1,704,000

Debt offering costs

1,200,000

Fair value of outstanding debt

106,200,000

105,500,000

Unamortized debt offering costs

561,000

818,000

4.875% Notes Due 2026 | Unsecured Debt

Debt Instrument [Line Items]

Aggregate principal amount

$ 108,000,000

$ 108,000,000

$ 108,000,000

Interest rate

4.875%

Stated Maturity

Apr. 30, 2026

Debt instrument, frequency of periodic payment

semi-annually

Debt instrument, date of first required payment

Sep. 16, 2021

4.875% Notes Due 2026 | Private Placement

Debt Instrument [Line Items]

Interest rate

4.875%

4.875% Notes Due 2026 | Private Placement | Unsecured Debt

Debt Instrument [Line Items]

Aggregate principal amount

$ 28,000,000

$ 80,000,000

Interest rate

4.875%

4.875%

Proceeds from offering of notes

$ 27,400,000

Proceeds from offering of notes

$ 77,700,000

6.125% Notes Due 2022

Debt Instrument [Line Items]

Weighted average stated interest rate on debt outstanding

0.00%

0.00%

6.13%

Interest rate

6.125%

6.125%

Debt instrument, frequency of periodic payment

quarterly

Debt offering costs

$ 2,900,000

Debt Instrument redemption, amount

$ 77,400,000

Debt instrument, redemption start date

Apr. 30, 2021

Debt instrument, redemption end date

May 30, 2021

Gain (Loss) on Extinguishment of Debt

$ 1,000,000

Percentage of aggregate outstanding principal amount

100.00%

6.125% Notes Due 2022 | Unsecured Debt

Debt Instrument [Line Items]

Aggregate principal amount

$ 77,400,000

76,726,000

$ 77,407,000

Interest rate

6.125%

Proceeds from offering of notes

$ 74,600,000

Stated Maturity

Sep. 30, 2022

HCAP Notes

Debt Instrument [Line Items]

Weighted average stated interest rate on debt outstanding

0.00%

0.00%

6.13%

Aggregate principal amount

$ 28,750,000

Interest rate

6.125%

Stated Maturity

Sep. 15, 2022

Debt Instrument redemption, amount

$ 28,750,000

$ 28,750,000

$ 28,750,000

2018-2 Secured Notes

Debt Instrument [Line Items]

Weighted average stated interest rate on debt outstanding

7.35%

3.51%

2.23%

Aggregate principal amount

$ 125,683,000

$ 178,163,000

$ 163,863,000

$ 251,863,000

312,000,000

Debt discount

712,000

1,226,000

Fair value of outstanding debt

125,000,000

$ 176,900,000

Debt Instrument redemption, amount

$ 88,000,000

$ 52,500,000

Number of coverage tests | CoverageTest

2

2018-2 Subordinated Notes

Debt Instrument [Line Items]

Aggregate principal amount

$ 108,000,000

[1]	The indenture governing our CLO permits the repricing or refinancing of the secured notes after November 20, 2020, which may result in the redemption of the outstanding notes occurring prior to their stated maturity.
[2]	The indenture governing our CLO permits the repricing or refinancing of the secured notes after November 20, 2020, which may result in the redemption of the outstanding notes occurring prior to their stated maturity.

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