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	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Apr. 30, 2014	Sep. 30, 2014	Sep. 30, 2015
Successor Company
Management Agreement and Related Party Transactions
Total CLO management fees	$ 9,449	$ 12,544		$ 22,950	$ 29,486
Successor Company \| Collateral manager \| CLO Management Fees
Management Agreement and Related Party Transactions
Base management fees, gross	1,747	12,418		17,630	5,457
CLO management fees credit	5,069	(4,860)		(5,607)	15,933
Total CLO management fees	$ 6,816	$ 7,558		$ 12,023	$ 21,390
Predecessor Company
Management Agreement and Related Party Transactions
Total CLO management fees			$ 29,841
Predecessor Company \| Collateral manager \| CLO Management Fees
Management Agreement and Related Party Transactions
Base management fees, gross			2,905
CLO management fees credit			8,111
Total CLO management fees			$ 11,016