ACQUISITIONS (Details 3) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	May 13, 2016	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016	Aug. 01, 2015
Assets Acquired and Liabilities Assumed
Goodwill		$ 366,168	$ 371,259	$ 366,168	$ 266,640
Goodwill, Purchase Accounting Adjustments				99,436
Acquisition costs		2,100		2,100
Haddon House Food Products, Inc.
Business Acquisition [Line Items]
Business acquisition, cash consideration paid		217,495
Assets Acquired and Liabilities Assumed
Accounts receivable		40,434	40,134	40,434
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Receivable			(300)
Other receivable		3,621	3,621	3,621
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Current Assets, Receivables			0
Inventories		46,138	46,440	46,138
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory			302
Prepaid expenses and other current assets		1,645	1,744	1,645
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Current Assets, Prepaid Expense and Other Assets			99
Property and equipment		54,501	54,501	54,501
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment			0
Other assets		280	280	280
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets			0
Goodwill		45,851	43,585	45,851
Goodwill, Purchase Accounting Adjustments			(2,266)
Total assets		258,570	256,405	258,570
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets			(2,165)
Liabilities		39,510	38,910	39,510
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities			(600)
Total purchase price		219,060	217,495	$ 219,060
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual		$ 100,400
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred			(1,565)
Other Intangible Assets | Haddon House Food Products, Inc.
Assets Acquired and Liabilities Assumed
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles			0
Other intangible assets			2,000
Customer Lists | Haddon House Food Products, Inc.
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	13 years
Assets Acquired and Liabilities Assumed
Finite-lived intangible assets			62,700
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles			0
Tradename | Haddon House Food Products, Inc.
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	3 years
Assets Acquired and Liabilities Assumed
Finite-lived intangible assets			700
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles			0
Non-compete agreements | Haddon House Food Products, Inc.
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	5 years
Assets Acquired and Liabilities Assumed
Finite-lived intangible assets			700
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles			$ 0