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5. GOODWILL AND OTHER INTANGIBLE ASSETS (Details Narrative) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Other intangible assets, gross $ 57,500    
Accumulated amortization 25,700    
Amortization expense 2,600 $ 2,600 $ 3,000
Goodwill deductible for tax purposes 110,100    
Noncompete Agreements [Member]      
Other intangible assets, gross 6,400    
Accumulated amortization 5,800    
Trade Names [Member]      
Other intangible assets, gross 10,200    
Accumulated amortization 1,500    
Dispositions of intangibles $ 750    
Management Service Contracts [Member]      
Amortization period 25 years