XML 27 R12.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Unaudited Consolidated Schedule of Investments - Additional Information (Parenthetical) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Schedule of Investments [Line Items] |  |  |
Cost | $ 2,535,576,000 | [1] | $ 2,562,398,000
Total investments at fair value | $ 2,488,715,000 | [1] | $ 2,448,935,000
Percent of net assets | 208.00% | [1] | 205.40%
Non-qualifying assets | 28.80% |  | 25.90%
Aerospace and Defense |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 132,498,000 |  | $ 120,945,000
Percent of net assets | 11.10% |  | 10.10%
Automotive |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 80,828,000 |  | $ 76,934,000
Percent of net assets | 6.70% |  | 6.50%
Banking, Finance, Insurance and Real Estate |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 401,816,000 |  | $ 312,936,000
Percent of net assets | 33.60% |  | 26.20%
Beverage, Food and Tobacco |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 23,135,000 |  | $ 34,690,000
Percent of net assets | 1.90% |  | 2.90%
Capital Equipment |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 128,706,000 |  | $ 141,479,000
Percent of net assets | 10.80% |  | 11.90%
Chemicals, Plastics, and Rubber |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 35,897,000 |  | $ 47,076,000
Percent of net assets | 3.00% |  | 3.90%
Construction and Building |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 30,387,000 |  | $ 45,049,000
Percent of net assets | 2.50% |  | 3.80%
Consumer goods: Durable |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 47,074,000 |  | $ 43,932,000
Percent of net assets | 3.90% |  | 3.70%
Consumer goods: Non-durable |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 28,210,000 |  | $ 27,693,000
Percent of net assets | 2.40% |  | 2.30%
Containers, Packaging and Glass |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 37,524,000 |  | $ 37,877,000
Percent of net assets | 3.10% |  | 3.20%
Energy: Electricity |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 20,874,000 |  | $ 7,337,000
Percent of net assets | 1.70% |  | 0.60%
Energy: Oil and Gas |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 3,240,000 |  | $ 4,776,000
Percent of net assets | 0.30% |  | 0.40%
Environmental Industries |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 53,484,000 |  | $ 51,006,000
Percent of net assets | 4.50% |  | 4.30%
Healthcare and Pharmaceuticals |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 216,952,000 |  | $ 203,576,000
Percent of net assets | 18.10% |  | 17.10%
High Tech Industries |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 303,082,000 |  | $ 300,980,000
Percent of net assets | 25.40% |  | 25.20%
Hotel, Gaming and Leisure |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 54,256,000 |  | $ 54,023,000
Percent of net assets | 4.50% |  | 4.50%
Investment Funds and Vehicles |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 110,066,000 |  | $ 130,427,000
Percent of net assets | 9.20% |  | 10.90%
Media: Advertising, Printing and Publishing |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 39,447,000 |  | $ 55,477,000
Percent of net assets | 3.30% |  | 4.70%
Media: Broadcasting and Subscription |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 13,277,000 |  | $ 20,257,000
Percent of net assets | 1.10% |  | 1.70%
Media: Diversified and Production |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 64,559,000 |  | $ 60,561,000
Percent of net assets | 5.40% |  | 5.10%
Metals and Mining |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 8,993,000 |  | $ 33,125,000
Percent of net assets | 0.80% |  | 2.80%
Services: Business |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 326,762,000 |  | $ 338,417,000
Percent of net assets | 27.30% |  | 28.40%
Services: Consumer |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 61,409,000 |  | $ 67,070,000
Percent of net assets | 5.10% |  | 5.60%
Structured Products |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 102,922,000 |  | $ 86,703,000
Percent of net assets | 8.60% |  | 7.30%
Telecommunications |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 27,565,000 |  | $ 24,058,000
Percent of net assets | 2.30% |  | 2.00%
Transportation: Cargo |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 96,450,000 |  | $ 89,398,000
Percent of net assets | 8.10% |  | 7.50%
Transportation: Consumer |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 11,951,000 |  | $ 11,062,000
Percent of net assets | 1.00% |  | 0.90%
Utilities: Electric |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 22,696,000 |  | $ 17,374,000
Percent of net assets | 1.90% |  | 1.50%
Utilities: Oil and Gas |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 4,655,000 |  | $ 4,697,000
Percent of net assets | 0.40% |  | 0.40%
Percentage of Total Portfolio | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 100.00% |  | 100.00%
Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 100.00% |  | 100.00%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 100.00% |  | 100.00%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Aerospace and Defense |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 5.30% |  | 4.90%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Automotive |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 3.30% |  | 3.20%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Banking, Finance, Insurance and Real Estate |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 16.10% |  | 12.80%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Beverage, Food and Tobacco |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 0.90% |  | 1.40%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Capital Equipment |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 5.20% |  | 5.80%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Chemicals, Plastics, and Rubber |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 1.50% |  | 1.90%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Construction and Building |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 1.20% |  | 1.80%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Consumer goods: Durable |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 1.90% |  | 1.80%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Consumer goods: Non-durable |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 1.10% |  | 1.10%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Containers, Packaging and Glass |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 1.50% |  | 1.50%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Energy: Electricity |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 0.80% |  | 0.30%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Energy: Oil and Gas |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 0.10% |  | 0.20%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Environmental Industries |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 2.10% |  | 2.10%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Healthcare and Pharmaceuticals |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 8.70% |  | 8.30%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | High Tech Industries |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 12.20% |  | 12.30%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Hotel, Gaming and Leisure |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 2.20% |  | 2.20%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Investment Funds and Vehicles |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 4.40% |  | 5.30%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Media: Advertising, Printing and Publishing |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 1.60% |  | 2.30%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Media: Broadcasting and Subscription |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 0.50% |  | 0.80%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Media: Diversified and Production |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 2.60% |  | 2.50%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Metals and Mining |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 0.40% |  | 1.40%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Services: Business |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 13.20% |  | 13.80%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Services: Consumer |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 2.50% |  | 2.70%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Structured Products |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 4.10% |  | 3.50%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Telecommunications |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 1.10% |  | 1.00%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Transportation: Cargo |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 3.90% |  | 3.70%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Transportation: Consumer |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 0.50% |  | 0.50%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Utilities: Electric |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 0.90% |  | 0.70%
Percentage of Total Portfolio, at Fair Value | Industry Concentration Risk Member | Utilities: Oil and Gas |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 0.20% |  | 0.20%
Senior debt and 1st lien notes |  |  |
Schedule of Investments [Line Items] |  |  |
Cost | $ 1,705,353,000 |  | $ 1,752,943,000
Total investments at fair value | $ 1,670,300,000 |  | $ 1,696,192,000
Percent of net assets | 140.00% |  | 142.00%
Senior debt and 1st lien notes | Percentage of Total Portfolio | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 67.00% |  | 69.00%
Senior debt and 1st lien notes | Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 67.00% |  | 69.00%
Subordinated debt and 2nd lien notes |  |  |
Schedule of Investments [Line Items] |  |  |
Cost | $ 256,850,000 |  | $ 326,639,000
Total investments at fair value | $ 238,215,000 |  | $ 263,139,000
Percent of net assets | 20.00% |  | 22.00%
Subordinated debt and 2nd lien notes | Percentage of Total Portfolio | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 10.00% |  | 13.00%
Subordinated debt and 2nd lien notes | Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 10.00% |  | 11.00%
Structured Products |  |  |
Schedule of Investments [Line Items] |  |  |
Cost | $ 107,314,000 |  | $ 88,805,000
Total investments at fair value | $ 93,038,000 |  | $ 73,550,000
Percent of net assets | 8.00% |  | 6.00%
Structured Products | Percentage of Total Portfolio | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 4.00% |  | 3.00%
Structured Products | Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 4.00% |  | 3.00%
Equity shares |  |  |
Schedule of Investments [Line Items] |  |  |
Cost | $ 320,335,000 |  | $ 230,188,000
Total investments at fair value | $ 374,704,000 |  | $ 284,570,000
Percent of net assets | 31.00% |  | 24.00%
Equity shares | Percentage of Total Portfolio | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 13.00% |  | 9.00%
Equity shares | Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 15.00% |  | 12.00%
Equity warrants |  |  |
Schedule of Investments [Line Items] |  |  |
Cost | $ 76,000 |  | $ 178,000
Total investments at fair value | $ 2,392,000 |  | $ 1,057,000
Percent of net assets | 0.00% |  | 0.00%
Equity warrants | Percentage of Total Portfolio | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 0.00% |  | 0.00%
Equity warrants | Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 0.00% |  | 0.00%
Investments in joint ventures / PE fund |  |  |
Schedule of Investments [Line Items] |  |  |
Cost | $ 145,648,000 |  | $ 163,645,000
Total investments at fair value | $ 110,066,000 |  | $ 130,427,000
Percent of net assets | 9.00% |  | 11.00%
Investments in joint ventures / PE fund | Percentage of Total Portfolio | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 6.00% |  | 6.00%
Investments in joint ventures / PE fund | Percentage of Total Portfolio, at Fair Value | Investment Type Concentration Risk |  |  |
Schedule of Investments [Line Items] |  |  |
Percent of Total Portfolio | 4.00% |  | 5.00%
MVC Credit Support Agreement |  |  |
Schedule of Investments [Line Items] |  |  |
Credit support agreements | $ 3,700,000 |  | $ (1,214,000)
MVC Credit Support Agreement | Barings LLC |  |  |
Schedule of Investments [Line Items] |  |  |
Credit support agreements | 3,700,000 |  | (1,214,000)
Notional Amount | 23,000,000 |  | 23,000,000
Sierra Credit Support Agreement |  |  |
Schedule of Investments [Line Items] |  |  |
Credit support agreements | (3,900,000) |  | (3,700,000)
Sierra Credit Support Agreement | Barings LLC |  |  |
Schedule of Investments [Line Items] |  |  |
Credit support agreements | (3,900,000) |  | (3,700,000)
Notional Amount | 100,000,000 |  | 100,000,000
MVC Private Equity Fund LP |  |  |
Schedule of Investments [Line Items] |  |  |
Cost | 8,160,000 | [2] | 9,124,000
Total investments at fair value | 1,005,000 | [2] | 1,838,000
Control investments |  |  |
Schedule of Investments [Line Items] |  |  |
Cost | 103,163,000 | [2] | 95,571,000
Total investments at fair value | $ 90,920,000 | [2] | $ 106,328,000
Percent of net assets | 7.60% | [2] | 8.90%
Control investments | MVC Private Equity Fund LP |  |  |
Schedule of Investments [Line Items] |  |  |
Total investments at fair value | $ 1,005,000 |  | $ 1,838,000
Control investments | MVC Private Equity Fund LP | General Partner |  |  |
Schedule of Investments [Line Items] |  |  |
Partners' capital account, return of capital |  |  | 100,000,000
Control investments | MVC Private Equity Fund LP | Limited Partner |  |  |
Schedule of Investments [Line Items] |  |  |
Partners' capital account, return of capital |  |  | 6,000,000,000.0
February 2019 Credit Facility | Line of Credit |  |  |
Schedule of Investments [Line Items] |  |  |
Commitment aggregate amount | $ 1,100,000,000 |  | $ 1,100,000,000
[1] | Fair value as a percentage of net assets.
[2] | As defined in the 1940 Act, the Company is deemed to be both an “affiliated person” and “control” the portfolio company because it owns more than 25% of the portfolio company’s outstanding voting securities or it has the power to exercise control over the management or policies of such portfolio company (including through a management agreement). Transactions as of and during the year ended December 31, 2023 in which the portfolio company is deemed to be a “Control Investment” of the Company were as follows:
| December 31, 2022 Value | Gross Additions (a) | Gross Reductions (b) | Amount of Realized Gain (Loss) | Amount of Unrealized Gain (Loss) | December 31, 2023 Value | Amount of Interest or Dividends Credited to Income(c)
Portfolio Company | Type of Investment
Black Angus Steakhouses, LLC(d) | First Lien Senior Secured Term Loan (14.4% PIK) | $ | 5,647 |  | $ | 1,330 |  | $ | — |  | $ | — |  | $ | 189 |  | $ | 7,166 |  | $ | 1,401 |
First Lien Senior Secured Term Loan (10.0% PIK)(e) | 9,147 |  | — |  | — |  | — |  | (4,278) |  | 4,869 |  | — |
LLC Units (44.6 units) | — |  | — |  | — |  | — |  | — |  | — |  | — |
| 14,794 |  | 1,330 |  | — |  | — |  | (4,089) |  | 12,035 |  | 1,401 |
MVC Automotive Group GmbH(d) | Bridge Loan (4.5% Cash, 1.5% PIK) | 7,149 |  | 2,613 |  | — |  | — |  | — |  | 9,762 |  | 587 |
Common Equity Interest (18,000 Shares) | 9,675 |  | — |  | — |  | — |  | 5,755 |  | 15,430 |  | — |
| 16,824 |  | 2,613 |  | — |  | — |  | 5,755 |  | 25,192 |  | 587 |
MVC Private Equity Fund LP | General Partnership Interest (1,831.4 units) | 45 |  | — |  | (24) |  | — |  | 3 |  | 24 |  | 95 |
Limited Partnership Interest (71,790.4 units) | 1,793 |  | — |  | (940) |  | — |  | 128 |  | 981 |  | — |
| 1,838 |  | — |  | (964) |  | — |  | 131 |  | 1,005 |  | 95 |
Security Holdings B.V(d) | Bridge Loan (5.0% PIK,) | 6,020 |  | 308 |  | — |  | — |  | — |  | 6,328 |  | 309 |
2023 Revolver (6.0% Cash) | — |  | 3,840 |  | (22) |  | — |  | 48 |  | 3,866 |  | 168 |
Senior Subordinated Term Loan (3.1% PIK) | 10,534 |  | 333 |  | — |  | — |  | — |  | 10,867 |  | 379 |
Senior Unsecured Term Loan (6.0% Cash, 9.0% PIK) | 2,015 |  | 154 |  | — |  | — |  | 67 |  | 2,236 |  | 374 |
Common Stock Series A (17,100 shares) | 575 |  | — |  | — |  | — |  | (264) |  | 311 |  | — |
Common Stock Series B (1,236 shares) | 53,728 |  | — |  | — |  | — |  | (24,648) |  | 29,080 |  | — |
| 72,872 |  | 4,635 |  | (22) |  | — |  | (24,797) |  | 52,688 |  | 1,230 |
Total Control Investments | $ | 106,328 |  | $ | 8,578 |  | $ | (986) |  | $ | — |  | $ | (23,000) |  | $ | 90,920 |  | $ | 3,313 |
(a) Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable. (b) Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital. (c) Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Control category. (d) The fair value of the investment was determined using significant unobservable inputs. (e) Non-accrual investment.

X
- Definition Investment Owned, Non-Qualifying Assets + References No definition available. + Details
Name: | bbdc_InvestmentOwnedNonQualifyingAssets
Namespace Prefix: | bbdc_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-42 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-21 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-20 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482861/275-10-50-18 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482861/275-10-50-20 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Cost of the investment. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 55 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480493/946-210-55-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480167/946-830-55-12 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 8)(a)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 11)(a)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column F)(Footnote 5)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 19 -Subparagraph (3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-19 + Details
Name: | us-gaap_InvestmentOwnedAtCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in security owned. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 55 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480493/946-210-55-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-2 Reference 10: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480167/946-830-55-12 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(11)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479617/946-210-S99-1 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479617/946-210-S99-1 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(2)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479617/946-210-S99-1 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(2)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479617/946-210-S99-1 Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column A)(Footnote 1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)(Footnote 6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)(Footnote 7)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 9)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column F)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 1)(b)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 1)(b)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column F)(Footnote 4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column F)(Footnote 7)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 + Details
Name: | us-gaap_InvestmentOwnedAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of investment owned to net assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 55 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480493/946-210-55-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-1 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480524/946-210-50-6 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column D)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)(Footnote 6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column F)(Footnote 7)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 + Details
Name: | us-gaap_InvestmentOwnedPercentOfNetAssets
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total change in each class of partners' capital accounts during the year due to the return of partner's capital. That is, excess distributions over earnings to partners. All partners include general, limited and preferred partners. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-5 + Details
Name: | us-gaap_PartnersCapitalAccountReturnOfCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 1)(b)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column A)(Footnote 2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)(Footnote 4)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column A)(Footnote 1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column A)(Footnote 2)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column A)(Footnote 2)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column A)(Footnote 4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column B)(Footnote 7)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 8)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 8)(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 8)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 8)(a)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 8)(b)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 8)(b)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 8)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 9)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12(Column C)(Footnote 10)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column D)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)(Footnote 1)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)(Footnote 1)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 31: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)(Footnote 3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 32: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)(Footnote 4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 33: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)(Footnote 4)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 34: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)(Footnote 6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 35: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column A)(Footnote 7)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 36: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 9)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 37: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column B)(Footnote 10)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 38: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 11)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 39: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 11)(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 40: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 11)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 41: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 11)(a)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 42: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 11)(b)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 43: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 11)(b)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 44: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 11)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 45: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 12)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 46: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)(Footnote 13)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3 Reference 47: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 48: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 49: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column F)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 50: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 1)(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 51: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 1)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 52: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 1)(a)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 53: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 1)(b)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 54: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 1)(b)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 55: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 1)(b)(4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 56: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 1)(b)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 57: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 1)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 58: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column A)(Footnote 3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 59: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column F)(Footnote 4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 60: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column F)(Footnote 5)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 61: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column F)(Footnote 7)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 62: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column F)(Footnote 8)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 63: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column F)(Footnote 9)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6 Reference 64: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 19 -Subparagraph (1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-19 Reference 65: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 19 -Subparagraph (3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-19 + Details
Name: | us-gaap_ScheduleOfInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(7)(c)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(7)(c)(5)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(7)(c)(6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(7)(c)(7)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 5A -Subparagraph (SX 210.12-13A(Column F)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-5A + Details
Name: | us-gaap_UnrealizedGainLossOnDerivatives
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_AerospaceAndDefenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_AutomotiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_BankingFinanceInsuranceAndRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_BeverageFoodAndTobaccoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_CapitalEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_ChemicalsPlasticsAndRubberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_ConstructionAndBuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_ConsumerGoodsDurableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_ConsumerGoodsNonDurableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_ContainersPackagingAndGlassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_EnergyElectricityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_EnergyOilAndGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_EnvironmentalIndustriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_HealthcareAndPharmaceuticalsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_HighTechIndustriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_HotelGamingAndLeisureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_InvestmentFundsAndVehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_MediaAdvertisingPrintingAndPublishingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_MediaBroadcastingAndSubscriptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_MediaDiversifiedAndProductionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_MetalsAndMiningMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_ServicesBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_ServicesConsumerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_StructuredProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_TelecommunicationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_TransportationCargoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_TransportationConsumerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_UtilitiesElectricMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=bbdc_UtilitiesOilAndGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=bbdc_InvestmentOwnedAtCostMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=bbdc_InvestmentTypeConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=bbdc_InvestmentOwnedAtFairValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=bbdc_IndustryConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=bbdc_DebtSecuritiesSeniorDebtAnd1stLienNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=bbdc_DebtSecuritiesSubordinatedDebtAnd2ndLienNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=bbdc_StructuredProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=bbdc_EquityWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=bbdc_InvestmentInJointVenturesPEFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=bbdc_MVCCreditSupportAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=bbdc_BaringsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=bbdc_SierraCreditSupportAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentIssuerNameAxis=bbdc_MVCPrivateEquityFundLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentIssuerAffiliationAxis=us-gaap_InvestmentAffiliatedIssuerControlledMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=us-gaap_GeneralPartnerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=us-gaap_LimitedPartnerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=bbdc_February2019CreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |