Represents management fee expenses recognized resulting from transactions with related party.

No definition available.

Name:	kfn_RelatedPartyTransactionExpensesFromTransactionsWithRelatedPartyManagementFees
Namespace Prefix:	kfn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents an offset to monthly related party management fees related to CLO management fees.

+ References

No definition available.

+ Details

Name:	kfn_RelatedPartyTransactionRelatedPartyCLOManagementFeesCredit
Namespace Prefix:	kfn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

Name:	us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_SuccessorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=kfn_CollateralManagerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=kfn_CLOManagementFeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_PredecessorMember
Namespace Prefix:
Data Type:	na
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MANAGEMENT AGREEMENT AND RELATED PARTY TRANSACTIONS MANAGEMENT AGREEMENT AND RELATED PARTY TRANSACTIONS (Details 4) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	Apr. 30, 2014	Jun. 30, 2014	Jun. 30, 2015	Apr. 30, 2014	Jun. 30, 2015
Successor Company
Management Agreement and Related Party Transactions
Total CLO management fees		$ 10,406	$ 9,817		$ 20,037
Successor Company \| Collateral manager \| CLO Management Fees
Management Agreement and Related Party Transactions
Base management fees, gross		3,718	1,981		3,710
CLO management fees credit		747	6,426		10,864
Total CLO management fees		$ 4,465	$ 8,407		$ 14,574
Predecessor Company
Management Agreement and Related Party Transactions
Total CLO management fees	$ 4,224			$ 29,841
Predecessor Company \| Collateral manager \| CLO Management Fees
Management Agreement and Related Party Transactions
Base management fees, gross	739			2,905
CLO management fees credit	1,741			8,111
Total CLO management fees	$ 2,480			$ 11,016