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SEGMENT INFORMATION: (Geographical Areas) (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Aug. 31, 2018
USD ($)
Aug. 31, 2017
USD ($)
Aug. 31, 2018
USD ($)
country
Aug. 31, 2017
USD ($)
country
Aug. 31, 2018
Aug. 31, 2018
country
Nov. 30, 2017
USD ($)
country
Revenue from External Customers and Net Property and Equipment [Line Items]              
Revenues $ 4,906,610 $ 4,276,686 $ 14,431,562 $ 11,733,823      
Property and equipment, net $ 343,548   $ 343,548       $ 346,589
Other              
Revenue from External Customers and Net Property and Equipment [Line Items]              
Number of other countries with over 10% of total revenue 0 0 0 0      
Number of other countries with over 10% of net property and equipment         0 0 0
Geographic Concentration Risk [Member] | UNITED STATES | Sales [ Memeber]              
Revenue from External Customers and Net Property and Equipment [Line Items]              
Revenues $ 3,627,193 $ 3,188,407 $ 10,411,668 $ 8,563,766      
Geographic Concentration Risk [Member] | UNITED STATES | Property and Equipment [Member]              
Revenue from External Customers and Net Property and Equipment [Line Items]              
Property and equipment, net 141,805   141,805       $ 144,015
Geographic Concentration Risk [Member] | CANADA | Sales [ Memeber]              
Revenue from External Customers and Net Property and Equipment [Line Items]              
Revenues 428,789 410,916 1,312,986 1,187,843      
Geographic Concentration Risk [Member] | INDIA | Property and Equipment [Member]              
Revenue from External Customers and Net Property and Equipment [Line Items]              
Property and equipment, net 32,770   32,770       37,490
Geographic Concentration Risk [Member] | Other | Sales [ Memeber]              
Revenue from External Customers and Net Property and Equipment [Line Items]              
Revenues 850,628 $ 677,363 2,706,908 $ 1,982,214      
Geographic Concentration Risk [Member] | Other | Property and Equipment [Member]              
Revenue from External Customers and Net Property and Equipment [Line Items]              
Property and equipment, net $ 168,973   $ 168,973       $ 165,084