SIGNIFICANT ACCOUNTING POLICIES (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Aug. 01, 2015
Amortizing intangible assets:
Gross Carrying Amount	$ 202,452	$ 200,913
Accumulated Amortization	49,926	34,315
Net	152,526	166,598
Total intangible assets
Intangible assets, gross	258,215	256,629
Intangible assets, net	208,289	222,314
Amortization expense	15,200	8,900	$ 7,800
Estimated future amortization expense on finite lived intangible assets
2014	14,981
2015	14,440
2016	13,813
2017	12,908
2018	11,582
2023 and thereafter	84,802
Net	152,526	166,598
Customer relationships
Amortizing intangible assets:
Gross Carrying Amount	197,852	196,313
Accumulated Amortization	48,044	33,447
Net	149,808	162,866
Estimated future amortization expense on finite lived intangible assets
Net	149,808	162,866
Non-compete agreements
Amortizing intangible assets:
Gross Carrying Amount	2,900	2,900
Accumulated Amortization	1,334	753
Net	1,566	2,147
Estimated future amortization expense on finite lived intangible assets
Net	1,566	2,147
Trademarks and tradenames
Amortizing intangible assets:
Gross Carrying Amount	1,700	1,700
Accumulated Amortization	548	115
Net	1,152	1,585
Indefinite lived intangible assets:
Indefinite lived intangible assets	55,763	55,716
Indefinite-Lived Intangible assets, accumulated amortization	0	0
Estimated future amortization expense on finite lived intangible assets
Net	$ 1,152	$ 1,585