Line Of Credit Facility Additional Increase In Borrowing Capacity

No definition available.

Name:	kfy_LineOfCreditFacilityAdditionalIncreaseInBorrowingCapacity
Namespace Prefix:	kfy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount the Company must maintain of unrestricted cash and or marketable securities (excluding any marketable securities that are held in trust for the settlement of obligations under certain deferred compensation plans) as a condition of consummating permitted acquisitions, paying dividends to shareholders and repurchases of our common stock.

+ References

No definition available.

+ Details

Name:	kfy_LineOfCreditFacilityCovenantAmount
Namespace Prefix:	kfy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The maximum amount the Company can spend in a fiscal year in dividends to stockholder, repurchased shares and permitted acquisitions according to the credit agreement.

+ References

No definition available.

+ Details

Name:	kfy_MaximumDividendForPermittedAcquisitionsAndShareRepurchase
Namespace Prefix:	kfy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The maximum amount the Company can spend in a fiscal year in dividends to stockholder and repurchased shares.

+ References

No definition available.

+ Details

Name:	kfy_MaximumDividendsRepurchasedShares
Namespace Prefix:	kfy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

Name:	us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

+ Details

Name:	us-gaap_DividendsPayableAmountPerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Date the dividend to be paid was declared, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DividendsPayableDateDeclaredDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Details

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Namespace Prefix:
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Balance Type:
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- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=kfy_AmendmentOfCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	kfy_DebtInstrumentCovenantTermsAxis=kfy_CashCashEquivalentsAndMarketableSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions			12 Months Ended
	Jun. 10, 2015	Jun. 05, 2015	Apr. 30, 2015
Subsequent Event [Line Items]
Financial covenants amount			$ 50.0
Value of common shares repurchases permitted, dividends paid and permitted acquisitions for any fiscal year			$ 125.0
Minimum
Subsequent Event [Line Items]
Quarterly Commitment Fees on the Facility's unused commitments			0.25%
Maximum
Subsequent Event [Line Items]
Quarterly Commitment Fees on the Facility's unused commitments			0.35%
London Interbank Offered Rate (LIBOR)
Subsequent Event [Line Items]
Applicable margin on variable interest rate			1.50%
London Interbank Offered Rate (LIBOR) \| Minimum
Subsequent Event [Line Items]
Applicable margin on variable interest rate			0.50%
London Interbank Offered Rate (LIBOR) \| Maximum
Subsequent Event [Line Items]
Applicable margin on variable interest rate			1.50%
Base Rate Loans \| Minimum
Subsequent Event [Line Items]
Applicable margin on variable interest rate			0.00%
Base Rate Loans \| Maximum
Subsequent Event [Line Items]
Applicable margin on variable interest rate			0.25%
Revolving Credit Facility
Subsequent Event [Line Items]
Revolving credit facility, maximum borrowing capacity			$ 75.0
Revolving credit facility, additional optional increase to maximum borrowing capacity			$ 50.0
Revolving credit facility, extended maturity date			Jan. 18, 2018
Revolving Credit Facility \| Letter of Credit
Subsequent Event [Line Items]
Revolving credit facility, maximum borrowing capacity			$ 15.0
Subsequent Event
Subsequent Event [Line Items]
Dividends payable, declared date	Jun. 10, 2015
Dividends payable, per share amount	$ 0.10
Dividends payable, payable date	Jul. 15, 2015
Dividends declared, record date	Jun. 25, 2015
Subsequent Event \| Credit Facility
Subsequent Event [Line Items]
Value of common shares repurchases permitted and dividends paid for any fiscal year		$ 75.0
Value of common shares repurchases permitted, dividends paid and permitted acquisitions for any fiscal year		125.0
Subsequent Event \| Credit Facility \| Cash, Cash Equivalents and Marketable Securities
Subsequent Event [Line Items]
Financial covenants amount		$ 50.0
Subsequent Event \| Credit Facility \| Minimum
Subsequent Event [Line Items]
Quarterly Commitment Fees on the Facility's unused commitments		0.25%
Subsequent Event \| Credit Facility \| Maximum
Subsequent Event [Line Items]
Quarterly Commitment Fees on the Facility's unused commitments		0.40%
Subsequent Event \| Credit Facility \| London Interbank Offered Rate (LIBOR) \| Minimum
Subsequent Event [Line Items]
Applicable margin on variable interest rate		0.875%
Subsequent Event \| Credit Facility \| London Interbank Offered Rate (LIBOR) \| Maximum
Subsequent Event [Line Items]
Applicable margin on variable interest rate		1.75%
Subsequent Event \| Credit Facility \| Base Rate Loans \| Minimum
Subsequent Event [Line Items]
Applicable margin on variable interest rate		0.00%
Subsequent Event \| Credit Facility \| Base Rate Loans \| Maximum
Subsequent Event [Line Items]
Applicable margin on variable interest rate		0.75%
Subsequent Event \| Credit Facility \| Revolving Credit Facility
Subsequent Event [Line Items]
Revolving credit facility, maximum borrowing capacity		$ 150.0
Revolving credit facility, additional optional increase to maximum borrowing capacity		$ 50.0
Revolving credit facility, extended maturity date		Jun. 03, 2020
Value of common shares repurchases permitted and dividends paid for any fiscal year		$ 75.0
Subsequent Event \| Credit Facility \| Revolving Credit Facility \| Letter of Credit
Subsequent Event [Line Items]
Revolving credit facility, maximum borrowing capacity		$ 15.0