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Income Taxes (Detail) (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 26, 2014 | Jan. 27, 2013 | Jan. 26, 2014 | Jan. 27, 2013 | Apr. 28, 2013
Income Taxes [Line Items] |  |  |  |  |  |
Income taxes | $ (3,807,000) | $ 1,700,000 | $ 216,000 | $ (188,000) |  |
Income tax rate |  |  | 1.40% | (1.30%) |  |
Statutory rate |  |  | 34.00% | 34.00% |  |
Decrease in effective income tax rate from undistributed earnings from foreign subsidiaries |  |  | (36.00%) |  |  |
Income tax expense (benefit) from income tax effects on undistributed earnings from foreign subsidiaries |  |  | (5,400,000) |  |  |
U.S. income and foreign withholding taxes |  |  | 26,900,000 | 21,900,000 | 22,000,000 |
Increase in income tax rate from adjustments to the state of North Carolina loss carryforwards for the decrease in future North Carolina corporate income tax rates |  |  | 2.00% |  |  |
Income tax expense related to the adjustments of the state of North Carolina loss carryforwards from the decrease in future North Carolina corporate income tax rates |  |  | 273,000 |  |  |
Decrease in income tax rate from the lower statutory income tax rates in foreign jurisdictions compared with the U.S statutory income tax rate |  |  | (7.00%) | (6.00%) |  |
Increase in income tax rate from an increase in unrecognized tax benefits |  |  | 4.00% | 5.00% |  |
Increase in income tax rate for stock-based compensation and other miscellaneous items |  |  | 4.40% | 2.70% |  |
Increase in effective income tax rate from the establishment of a deferred tax liability for undistributed earnings |  |  |  | 46.00% |  |
Income tax expense (benefit) from change in treatment of undistributed earnings |  |  |  | 6,600,000 |  |
Undistributed earnings from our foreign subsidiaries that will be distributed to the parent company | 69,800,000 | 56,300,000 | 69,800,000 | 56,300,000 | 56,700,000 |
Deferred tax liability, undistributed earnings from foreign subsidiaries | 1,700,000 | 6,800,000 | 1,700,000 | 6,800,000 | 7,000,000 |
U.S. foreign income tax credits |  |  | 25,200,000 | 15,100,000 | 15,000,000 |
Current deferred tax asset | 7,503,000 | 4,098,000 | 7,503,000 | 4,098,000 | 7,709,000 | [1]
Non-current deferred tax asset | 1,227,000 | 4,172,000 | 1,227,000 | 4,172,000 | 753,000 | [1]
Non-current deferred tax liability | 945,000 | 856,000 | 945,000 | 856,000 | 3,075,000 | [1]
Unrecognized tax benefits | 13,600,000 | 13,100,000 | 13,600,000 | 13,100,000 | 13,100,000 |
Unrecognized tax benefits that would favorably impact effective income tax rate if recognized | 4,000,000 | 4,200,000 | 4,000,000 | 4,200,000 | 4,200,000 |
Expected increase in unrecognized tax benefits related to double taxation under applicable tax treaties with foreign tax jurisdictions | 808,000 |  | 808,000 |  |  |
Net Non-current Deferred Income Tax Liability [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Unrecognized tax benefits | 9,600,000 |  | 9,600,000 |  | 8,900,000 |
Net Non-current Deferred Income Tax Assets [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Unrecognized tax benefits |  | 8,900,000 |  | 8,900,000 |  |
Income Taxes Payable - Long-Term [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Unrecognized tax benefits | 4,000,000 | 4,200,000 | 4,000,000 | 4,200,000 | 4,200,000 |
U.S. Tax Authorities [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Increase (decrease) in effective income tax rate from the change of valuation allowance for net deferred income tax assets |  |  |  | (84.00%) |  |
Income tax expense (benefit) related to changes in the valuation allowance for deferred tax assets |  |  |  | (12,100,000) |  |
Current deferred tax asset | 7,300,000 | 3,800,000 | 7,300,000 | 3,800,000 | 7,400,000 |
Non-current deferred tax asset | 600,000 | 3,400,000 | 600,000 | 3,400,000 |  |
Non-current deferred tax liability |  |  |  |  | 2,000,000 |
U.S. Tax Authorities [Member] | Foreign Subsidiaries in Canada and China [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Increase in effective income tax rate from the establishment of a deferred tax liability for undistributed earnings |  |  |  | 46.00% |  |
Income tax expense (benefit) from change in treatment of undistributed earnings |  |  |  | 6,600,000 |  |
U.S. Tax Authorities [Member] | Foreign Subsidiaries in China [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Decrease in effective income tax rate from undistributed earnings from foreign subsidiaries |  |  | (36.00%) |  |  |
Income tax expense (benefit) from income tax effects on undistributed earnings from foreign subsidiaries | (5,400,000) |  | (5,400,000) |  |  |
U.S. foreign income tax credits | 9,900,000 |  | 9,900,000 |  |  |
U.S. income and foreign withholding taxes | 4,500,000 |  | 4,500,000 |  |  |
China [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Current deferred tax asset | 217,000 | 329,000 | 217,000 | 329,000 | 325,000 |
Non-current deferred tax asset | 627,000 | 793,000 | 627,000 | 793,000 | 753,000 |
Canada [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Non-current deferred tax liability | 945,000 | 856,000 | 945,000 | 856,000 | 1,100,000 |
U.S. Tax Authorities and Poland Tax Authorities [Member] | Deferred Tax Asset Loss Carryforwards [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Valuation allowance | 1,000,000 | 926,000 | 1,000,000 | 926,000 | 963,000 |
U.S. State Tax [Member] | Deferred Tax Asset Loss Carryforwards [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Valuation allowance | 715,000 | 719,000 | 715,000 | 719,000 | 722,000 |
Poland [Member] | Culp Europe [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Increase (decrease) in effective income tax rate from the change of valuation allowance for net deferred income tax assets |  |  |  | 1.00% |  |
Poland [Member] | Culp Europe [Member] | Deferred Tax Asset Loss Carryforwards [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Valuation allowance | 291,000 | 207,000 | 291,000 | 207,000 | 241,000 |
Canada and China [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Decrease in income tax rate from the lower statutory income tax rates in foreign jurisdictions compared with the U.S statutory income tax rate |  |  | (7.00%) | (6.00%) |  |
Valuation allowance | 0 | 0 | 0 | 0 | 0 |
North Carolina [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Increase in income tax rate from adjustments to the state of North Carolina loss carryforwards for the decrease in future North Carolina corporate income tax rates |  |  | 2.00% |  |  |
Income tax expense related to the adjustments of the state of North Carolina loss carryforwards from the decrease in future North Carolina corporate income tax rates |  |  | $ 273,000 |  |  |
[1] | Derived from audited financial statements.

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e32123-109318 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e32059-109318 + Details
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- Definition The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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