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PROPERTY AND EQUIPMENT (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Summary of property and equipment [Abstract]    
Property and equipment, gross $ 75,639 $ 76,521
Less accumulated depreciation and amortization (72,028) (72,673)
Property and equipment, net 3,611 3,848
Construction in progress 1,012 839
Total 4,623 4,687
Office furniture and equipment    
Summary of property and equipment [Abstract]    
Property and equipment, gross 7,791 8,576
Computer hardware    
Summary of property and equipment [Abstract]    
Property and equipment, gross 7,100 7,747
Computer software    
Summary of property and equipment [Abstract]    
Property and equipment, gross 48,316 47,724
Automobiles    
Summary of property and equipment [Abstract]    
Property and equipment, gross 81 81
Leasehold improvements    
Summary of property and equipment [Abstract]    
Property and equipment, gross $ 12,351 $ 12,393