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Note 24 - Investments in Unconsolidated Affiliates and Variable Interest Entities (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 48 Months Ended | 72 Months Ended |  |  |  |  | 0 Months Ended |  |  |  |  |  |  | 72 Months Ended |  |  |  |  |  |
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Jul. 31, 2013 | Jul. 31, 2012 | Jul. 31, 2018 | Oct. 30, 2015 | Mar. 24, 2013 | Jun. 24, 2012 | Mar. 25, 2012 | Jun. 26, 2011 | Dec. 29, 2012 Five Largest Customers [Member] Parkdale America, LLC [Member] Sales Revenue, Goods, Net [Member] | Dec. 29, 2012 Five Largest Customers [Member] Parkdale America, LLC [Member] Accounts Receivable [Member] | Dec. 29, 2012 Largest Customer [Member] Parkdale America, LLC [Member] Sales Revenue, Goods, Net [Member] | Dec. 29, 2012 Largest Customer [Member] Parkdale America, LLC [Member] Accounts Receivable [Member] | Mar. 24, 2013 EAP Program [Member] Parkdale America, LLC [Member] | Dec. 23, 2012 EAP Program [Member] Parkdale America, LLC [Member] | Jun. 24, 2012 EAP Program [Member] Parkdale America, LLC [Member] | Mar. 25, 2012 EAP Program [Member] Parkdale America, LLC [Member] | Dec. 25, 2011 EAP Program [Member] Parkdale America, LLC [Member] | Jun. 26, 2011 EAP Program [Member] Parkdale America, LLC [Member] | Oct. 30, 2015 Customer Concentration Risk [Member] Parkdale America, LLC [Member] | Mar. 30, 2013 Parkdale America, LLC [Member] | Mar. 30, 2011 Parkdale America, LLC [Member] | Mar. 29, 2011 Parkdale America, LLC [Member] | Jun. 30, 1997 Parkdale America, LLC [Member] | Mar. 24, 2013 UNF and UNF America [Member] | Jun. 24, 2012 UNF and UNF America [Member]
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 34.00% |  |
Number of Manufacturing Facilities |  |  |  |  | 13 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  | 82.00% | 77.00% | 38.00% | 35.00% |  |  |  |  |  |  | 95.00% |  |  |  |  |  |
Number of Months Following the Marketing Year that the Government Subsidy Was Earned by PAL | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal Government Susidy Program Per Unit |  | four cents | three cents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Years Covered by the Supply Agreement Between PAL and HBI |  |  |  | 6 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Times the Supply Agreement Between PAL and HBI Can Be Extended |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Years the Supply Agreement Between PAL and HBI Can Be Extended Per Extension |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000 | $ 100,000 |  |  |
Cash and Cash Equivalents, at Carrying Value |  |  |  |  | 15,901 | 10,886 | 35,820 | 27,490 |  |  |  |  |  |  |  |  |  |  |  | 24,554 |  |  |  |  |
Line of Credit Facility, Amount Outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,000 |  |  |  |  |
Equity Method Investments |  |  |  |  | 92,971 | 95,763 |  |  |  |  |  |  |  |  |  |  |  |  |  | 88,304 |  |  |  | 4,667 |
Purchase Commitment, Remaining Minimum Amount Committed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,711 |
Accounts Payable, Related Parties |  |  |  |  | 678 | 496 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,744 | 4,184
Percentage of Current and Total Assets and Total Liabilities Accounted for by Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.00% |
Deferred Revenue |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,930 | $ 4,990 | $ 166 | $ 0 | $ 0 | $ 0 |  |  |  |  |  |  |

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