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

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

+ References

No definition available.

+ Details

Name:	kfn_RelatedPartyTransactionRelatedPartyOtherFeesCredit
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_ManagerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

MANAGEMENT AGREEMENT AND RELATED PARTY TRANSACTIONS (Details 3) - 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 \| Manager \| Base Management Fees
Management Agreement and Related Party Transactions
Base management fees, gross		6,688	7,836		16,327
CLO management fees credit		(747)	(6,426)		(10,864)
Related Party Transaction Credited Related Party Other Fees		0	0		0
Total CLO management fees		$ 5,941	$ 1,410		$ 5,463
Predecessor Company
Management Agreement and Related Party Transactions
Total CLO management fees	$ 4,224			$ 29,841
Predecessor Company \| Manager \| Base Management Fees
Management Agreement and Related Party Transactions
Base management fees, gross	3,372			13,364
CLO management fees credit	(1,741)			(8,111)
Related Party Transaction Credited Related Party Other Fees	0			0
Total CLO management fees	$ 1,631			$ 5,253