XML 59 R47.htm IDEA: XBRL DOCUMENT v3.21.1
ACCOUNTS RECEIVABLE AND SIGNIFICANT CLIENTS(NARRATIVE) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2018
Entity Wide Revenue Major Customer Line Items      
Concentration Risk, Customer   zero  
Revenue. $ 539,219 $ 432,213  
Financial Services Client      
Entity Wide Revenue Major Customer Line Items      
Concentration risk percentage 15.70% 2.90%  
Sears      
Entity Wide Revenue Major Customer Line Items      
Accounts receivable amount from major customer $ 2,700   $ 2,700
Revenue | Customer Concentration Risk | Minimum      
Entity Wide Revenue Major Customer Line Items      
Revenue. $ 100,000    
Revenue | Customer Concentration Risk | Financial Services Client      
Entity Wide Revenue Major Customer Line Items      
Concentration Risk, Customer one