XML 48 R37.htm IDEA: XBRL DOCUMENT
v3.26.1

Significant Accounting Policies - Schedule of Interest Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2026 | Mar. 31, 2025
Accounting Policies [Abstract] |  |
Prepayment premiums | $ 156 | $ 142
Accelerated amortization of upfront loan origination fees and unamortized discounts | $ 791 | $ 1,715

X
- Definition Investment income accelerated amortization of upfront loan origination fees and unamortized discounts. + References No definition available. + Details
Name: | gsbd_InvestmentIncomeAcceleratedAmortizationOfUpfrontLoanOriginationFeesAndUnamortizedDiscounts
Namespace Prefix: | gsbd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Investment income prepayment premiums. + References No definition available. + Details
Name: | gsbd_InvestmentIncomePrepaymentPremiums
Namespace Prefix: | gsbd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration