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Employee Benefit Plans - Additional Information (Detail) (USD $)
1 Months Ended 12 Months Ended
Dec. 31, 2008
Oct. 31, 2013
Oct. 31, 2012
Oct. 31, 2011
Compensation Plan [Line Items]        
Net actuarial losses   $ 100,000    
Defined benefit plan expected rate of return on plan assets, description   We have analyzed the expected rates of return on assets and determined that an estimated long-term rate of return of 6.0% is reasonable based on (1) the current and expected asset allocations; (2) the plan's historical investment performance; and (3) best estimates for future investment performance.    
Defined benefit plan expected rate of return on plan assets   6.00%    
Expected contributions for the next fiscal year   900,000    
Rabbi Trust
       
Compensation Plan [Line Items]        
Fair value of the assets held in the Rabbi Trust   5,400,000 5,000,000  
OneSource Services Inc | Cash
       
Compensation Plan [Line Items]        
Investments of plan assets   25.00%    
Minimum
       
Compensation Plan [Line Items]        
Green Zone Multiemployer Plan Funded Percentage   80.00% 80.00%  
Maximum
       
Compensation Plan [Line Items]        
Red Zone Multiemployer Plans Funded Percentage   65.00% 65.00%  
Yellow Zone Multiemployer Plans Funded Percentage   80.00% 80.00%  
Defined Contribution Pension Plan 401k
       
Compensation Plan [Line Items]        
Contributions paid for plans   8,000,000 7,900,000 8,300,000
Number of 401(k) savings plans   6    
Defined Benefit Pension and Other Postretirement Plans
       
Compensation Plan [Line Items]        
Contributions paid for plans   204,700,000 193,100,000 177,000,000
Equity Securities
       
Compensation Plan [Line Items]        
Investments of plan assets   40.00%    
Equity Securities | OneSource Services Inc
       
Compensation Plan [Line Items]        
Investments of plan assets   48.00%    
Debt Securities
       
Compensation Plan [Line Items]        
Investments of plan assets   27.00%    
Debt Securities | OneSource Services Inc
       
Compensation Plan [Line Items]        
Investments of plan assets   27.00%    
Employee Deferred Compensation Plan
       
Compensation Plan [Line Items]        
Minimum required annual base salary to qualify under employee deferred compensation plan   140,000    
Average rate of interest earned   3.08% 3.01% 3.25%
Employee Deferred Compensation Plan | Minimum
       
Compensation Plan [Line Items]        
Percentage of deferred pre-tax compensation   1.00%    
Employee Deferred Compensation Plan | Maximum
       
Compensation Plan [Line Items]        
Percentage of deferred pre-tax compensation   50.00%    
Director Deferred Compensation Plan
       
Compensation Plan [Line Items]        
Average rate of interest earned   3.08% 3.01% 3.25%
Director Deferred Compensation Plan, interest rate terms   If the prime rate exceeds 6%, the interest rate is equal to 6% plus one half of the excess over 6%. Interest earned under both deferred compensation plans is capped at 120% of the long-term applicable federal rate as discussed in the plans.    
Deferred Compensation Plan | OneSource Services Inc
       
Compensation Plan [Line Items]        
Company contributions to participant deferred compensation 50.00%      
Participant's compensation for the contribution allocation period 5.00%      
Aggregate expense recognized under deferred compensation plans   400,000 400,000 400,000
Total long-term liability of all deferred compensation plans   17,000,000 16,400,000  
Supplemental Executive Retirement Plan
       
Compensation Plan [Line Items]        
Number of years that the retirement benefit plan provide a monthly payment   10 years    
Death Benefit Plan
       
Compensation Plan [Line Items]        
Death benefit that the employee entitled to prior to retirement   $ 150,000    
Death benefit plan coverage percentage   50.00%