XML 23 R50.htm IDEA: XBRL DOCUMENT v3.3.0.814
Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jul. 25, 2015
Oct. 24, 2015
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Intangible Assets Gross Excluding Goodwill $ 216,986 $ 234,986
Accumulated amortization: 96,060 100,820
Intangible assets, net $ 120,926 134,166
Customer relationships    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Weighted average remaining useful lives (in years) 11 years 9 months 18 days  
Carrying amount $ 195,375 211,575
Accumulated amortization: $ 83,772 87,936
Contract backlog    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Weighted average remaining useful lives (in years) 10 months 24 days  
Carrying amount $ 8,076 8,076
Accumulated amortization: $ 7,381 7,574
Trade names    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Weighted average remaining useful lives (in years) 6 years 10 months 24 days  
Carrying amount $ 8,200 9,800
Accumulated amortization: $ 4,650 4,995
Non-compete agreements    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Weighted average remaining useful lives (in years) 3 years  
Carrying amount $ 635 835
Accumulated amortization: 257 315
UtiliQuest    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
UtiliQuest trade name $ 4,700 $ 4,700