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GOVERNMENT CONTRACTS (Details)
$ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
contract
Contracts [Line Items]  
Number of contracts that can be terminated (in contracts) 15
Performance bond commitments | $ $ 25.2
Expiring contracts  
Contracts [Line Items]  
Number of services with expiration dates within 12-month period (in contracts) 7
Contract expiration period 12 months
Number of contracts that can be terminated with renewal provisions (in contracts) 3
Consolidated revenues | Contracts that can be terminated without cause | Government contracts concentration risk  
Contracts [Line Items]  
Concentration risk percentage 59.00%
Consolidated revenues | Expiring contracts | Government contracts concentration risk  
Contracts [Line Items]  
Concentration risk percentage 27.00%