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Fair Value of Financial Instruments - Narrative (Detail) (Short-term investments [Member], USD $)	Jan. 26, 2014	Apr. 28, 2013	Jan. 27, 2013
Short-term investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term bond funds	$ 6,300,000	$ 5,300,000	$ 5,200,000
Unrealized gain (loss) on short-term bond funds	$ (74,000)	$ 54,000	$ 26,000

X

- Definition

Net amount of accumulated unrealized gains (losses) on investments in available-for-sale securities impacting investments. Represents the difference between the fair value and cost of investments in available-for-sale securities.

+ References

No definition available.

+ Details

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Namespace Prefix:	cfi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (aa)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563



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=6871852&loc=d3e26610-111562

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Details

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