XML 62 R38.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Marketable Securities - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Jul. 31, 2015 | Jul. 31, 2014 | Apr. 30, 2015
Schedule Of Marketable Securities [Line Items] |  |  |  |
Proceeds from maturities of available-for-sale securities |  | $ 3,000 | $ 2,000 |
Trading securities | [1],[2] | 127,793 |  | $ 131,399
Gross unrealized gains |  | 8,000 |  | 8,300
Gross unrealized losses |  | $ 600 |  | $ 200
Minimum |  |  |  |
Schedule Of Marketable Securities [Line Items] |  |  |  |
Available-for-sale marketable securities, remaining maturities |  | 2 months |  |
Maximum |  |  |  |
Schedule Of Marketable Securities [Line Items] |  |  |  |
Available-for-sale marketable securities, remaining maturities |  | 5 months |  |
[1] | The Company's financial assets measured at fair value on a recurring basis include trading securities classified as Level 1 and available-for-sale securities classified as Level 2. As of July 31, 2015 and April 30, 2015, the Company had no investments classified as Level 3.
[2] | These investments are held in trust for settlement of the Company's vested and unvested obligations of $125.5 million and $129.1 million as of July 31, 2015 and April 30, 2015, respectively, under the ECAP (see Note 6 -Deferred Compensation and Retirement Plans). During the three months ended July 31, 2015 and 2014, the fair value of the investments increased; therefore, the Company recognized income of $0.7 million and $2.0 million, respectively, which was recorded in other (loss) income, net.

X
- Definition Available for Sale Securities Contractual Maturity + References No definition available. + Details
Name: | kfy_AvailableForSaleSecuritiesContractualMaturity
Namespace Prefix: | kfy_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule Of Marketable Securities [Line Items] + References No definition available. + Details
Name: | kfy_ScheduleOfMarketableSecuritiesLineItems
Namespace Prefix: | kfy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Trading Securities Unrealized Holding Gain Accumulated In Investments + References No definition available. + Details
Name: | kfy_TradingSecuritiesUnrealizedHoldingGainAccumulatedInInvestments
Namespace Prefix: | kfy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Trading Securities Unrealized Holding Loss Accumulated In Investments + References No definition available. + Details
Name: | kfy_TradingSecuritiesUnrealizedHoldingLossAccumulatedInInvestments
Namespace Prefix: | kfy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash inflow associated with the sale or maturity (principal being due) of securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
Name: | us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26626-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 + Details
Name: | us-gaap_TradingSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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