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CREDIT FACILITY AND ACQUISITION DEBT (Long-term Debt Table) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
May 13, 2021
Debt Instrument [Line Items]            
Accumulated Amortization, Debt Issuance Costs $ 1,161,000 $ 819,000   $ 1,161,000    
Current maturities on long-term debt (814,000) (1,027,000)   (814,000)    
Long-term debt, excluding current maturities 4,401,000 4,482,000   4,401,000    
Revolving credit facility present accordion provisions 75,000,000.0     75,000,000.0    
Credit Facility amortization of debt issuance costs       345,000 $ 393,000  
Gain (Loss) on Extinguishment of Debt (23,807,000)   $ 0 (23,807,000) 0  
Credit Agreement 2018 [Member] | Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Long-term Debt 60,500,000 47,200,000   60,500,000   $ 58,800,000
Credit Facility amortization of debt issuance costs   99,000 $ 118,000 217,000 $ 245,000  
Credit Agreement [Member]            
Debt Instrument [Line Items]            
Gain (Loss) on Extinguishment of Debt       100,000    
Credit Agreement [Member] | Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Debt issuance costs   (1,136,000)        
Credit Agreement [Member] | Term Loan [Member]            
Debt Instrument [Line Items]            
Long-term Debt 58,937,000 46,064,000   58,937,000    
Notes Payable, Other Payables [Member] | Acquisition Debt, Deferred Purchase Price [Member]            
Debt Instrument [Line Items]            
Long-term Debt 5,215,000 5,509,000   5,215,000    
Revolving Credit Facility [Member] | Credit Agreement [Member]            
Debt Instrument [Line Items]            
Debt issuance costs (1,563,000)     (1,563,000)    
Term Loan [Member]            
Debt Instrument [Line Items]            
Revolving credit facility, maximum borrowing capacity   190,000,000.0        
New Term Loan            
Debt Instrument [Line Items]            
Revolving credit facility, maximum borrowing capacity $ 150,000,000.0     $ 150,000,000.0    
Letter of Credit [Member]            
Debt Instrument [Line Items]            
Revolving credit facility, maximum borrowing capacity   15.0        
Swingline [Member]            
Debt Instrument [Line Items]            
Revolving credit facility, maximum borrowing capacity   $ 10.0