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PROPERTY AND EQUIPMENT (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Nov. 30, 2018
USD ($)
item
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Property and equipment        
Property and equipment, gross   $ 55,929 $ 54,365  
Accumulated depreciation and amortization   (21,404) (15,375)  
Property and equipment, net   34,525 38,990  
Depreciation expense   6,228 4,941 $ 3,075
Sale-leaseback of land and building        
Property and equipment        
Sale-lease back, net book value $ 7,660      
Net cash proceeds from sale-leaseback transaction $ 14,300      
Sale-leaseback, term of lease 12 years      
Sale-leaseback, gross deferred gain $ 5,725      
Sale-leaseback, monthly base rental expense $ 78      
Sale-leaseback, percentage of increase in rental payments 2.00%      
Sale-leaseback, number of renewal terms of lease | item 3      
Sale-leaseback, renewal term of lease 5 years      
Land        
Property and equipment        
Property and equipment, gross   $ 3,532 5,232  
Buildings        
Property and equipment        
Useful Life   40 years    
Property and equipment, gross   $ 12,945 18,818  
Leasehold improvements        
Property and equipment        
Property and equipment, gross   $ 6,410 5,247  
Leasehold improvements | Minimum        
Property and equipment        
Useful Life   5 years    
Leasehold improvements | Maximum        
Property and equipment        
Useful Life   15 years    
Equipment and fixtures        
Property and equipment        
Property and equipment, gross   $ 18,769 14,116  
Equipment and fixtures | Minimum        
Property and equipment        
Useful Life   5 years    
Equipment and fixtures | Maximum        
Property and equipment        
Useful Life   10 years    
Computer equipment        
Property and equipment        
Property and equipment, gross   $ 11,999 8,527  
Computer equipment | Minimum        
Property and equipment        
Useful Life   3 years    
Computer equipment | Maximum        
Property and equipment        
Useful Life   5 years    
Construction in progress        
Property and equipment        
Property and equipment, gross   $ 2,274 $ 2,425