XML 48 R39.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Fair Value Measurements - Summary of Reconciliation of Beginning and Ending Balances for Fair Valued Investments (Details) - Level 3 - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Net change in unrealized appreciation (depreciation) on investments | $ (36,403) | $ 17,067 | $ (42,882) | $ 33,223
Fair Value, Recurring |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Beginning Balance |  |  | 718,767 | 742,869
Net realized gains (losses) on investments |  |  | 65,220 | 13,673
Net change in unrealized appreciation (depreciation) on investments |  |  | (67,774) | 32,019
Purchase of investments |  |  | 267,950 | 245,544
Proceeds from sales and repayments of investments |  |  | (128,255) | (319,036)
Interest and dividend income paid-in-kind |  |  | 1,327 | 3,437
Proceeds from loan origination fees |  |  | (1,869) | (1,949)
Accretion of loan origination fees |  |  | 1,094 | 1,833
Accretion of original issue discount |  |  | 137 | 734
Ending Balance | 856,597 | 719,124 | 856,597 | 719,124
Subordinated Debt | Fair Value, Recurring |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Beginning Balance |  |  | 36,064 | 107,911
Net change in unrealized appreciation (depreciation) on investments |  |  | 1,213 | (308)
Purchase of investments |  |  | 44,469 | 18,500
Proceeds from sales and repayments of investments |  |  |  | (57,039)
Interest and dividend income paid-in-kind |  |  | 273 | 81
Proceeds from loan origination fees |  |  | (300) | (80)
Accretion of loan origination fees |  |  | 40 | 387
Ending Balance | 81,759 | 69,452 | 81,759 | 69,452
First Lien Debt | Fair Value, Recurring |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Beginning Balance |  |  | 354,922 | 187,353
Net change in unrealized appreciation (depreciation) on investments |  |  | (1,281) | (1,182)
Purchase of investments |  |  | 166,279 | 172,506
Proceeds from sales and repayments of investments |  |  | (31,574) | (61,008)
Interest and dividend income paid-in-kind |  |  | 481 | 109
Proceeds from loan origination fees |  |  | (1,454) | (1,765)
Accretion of loan origination fees |  |  | 943 | 985
Accretion of original issue discount |  |  | 18 |
Ending Balance | 488,334 | 296,998 | 488,334 | 296,998
Second Lien Debt | Fair Value, Recurring |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Beginning Balance |  |  | 158,815 | 332,154
Net change in unrealized appreciation (depreciation) on investments |  |  | (13,048) | (1,213)
Purchase of investments |  |  | 49,498 | 43,850
Proceeds from sales and repayments of investments |  |  | (18,731) | (177,719)
Interest and dividend income paid-in-kind |  |  | 573 | 3,142
Proceeds from loan origination fees |  |  | (115) | (104)
Accretion of loan origination fees |  |  | 111 | 461
Accretion of original issue discount |  |  | 119 | 734
Ending Balance | 177,222 | 201,305 | 177,222 | 201,305
Equity | Fair Value, Recurring |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Beginning Balance |  |  | 165,762 | 112,836
Net realized gains (losses) on investments |  |  | 65,220 | 13,673
Net change in unrealized appreciation (depreciation) on investments |  |  | (54,102) | 34,066
Purchase of investments |  |  | 7,704 | 10,688
Proceeds from sales and repayments of investments |  |  | (77,950) | (23,270)
Interest and dividend income paid-in-kind |  |  |  | 105
Ending Balance | 106,634 | 148,098 | 106,634 | 148,098
Warrant | Fair Value, Recurring |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Beginning Balance |  |  | 3,204 | 2,615
Net change in unrealized appreciation (depreciation) on investments |  |  | (556) | 656
Ending Balance | $ 2,648 | $ 3,271 | $ 2,648 | $ 3,271

X
- Definition Fair value measurement with unobservable inputs reconciliation recurring basis asset, accretion of loan origination fees. + References No definition available. + Details
Name: | fdus_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAccretionOfLoanOriginationFees
Namespace Prefix: | fdus_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset, Accretion Of Original Issue Discount + References No definition available. + Details
Name: | fdus_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAccretionOfOriginalIssueDiscount
Namespace Prefix: | fdus_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value measurement with unobservable inputs reconciliation recurring basis asset, interest and dividend income paid-in-kind. + References No definition available. + Details
Name: | fdus_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetInterestAndDividendIncomePaidInKind
Namespace Prefix: | fdus_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value measurement with unobservable inputs reconciliation recurring basis asset, proceeds from loan origination fees. + References No definition available. + Details
Name: | fdus_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetProceedsFromLoanOriginationFees
Namespace Prefix: | fdus_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 No definition available. + Details
Name: | us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fdus_FirstLienDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fdus_SecondLienDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fdus_EquityInvestmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_WarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |