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DEBT - Amendment And Restated Senior Credit Facility (Details)
3 Months Ended 6 Months Ended 9 Months Ended
Jun. 28, 2019
USD ($)
Mar. 29, 2019
USD ($)
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Nov. 30, 2019
USD ($)
Oct. 31, 2019
USD ($)
Aug. 01, 2017
USD ($)
Second Amendment, Amended And Restated Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity   $ 75,000,000.0              
Reduction in revolving commitments   $ 40,000,000              
Payment of debt issuance costs       $ 600,000          
Second Amendment, Amended And Restated Credit Agreement [Member] | Minimum [Member]                  
Debt Instrument [Line Items]                  
Consolidated asset coverage ratio   1.10              
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarters Ending December 31, 2018 Through June 30, 2019 [Member] | Maximum [Member]                  
Debt Instrument [Line Items]                  
Consolidated net leverage ratio   4.60              
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending September 30, 2019 [Member] | Maximum [Member]                  
Debt Instrument [Line Items]                  
Consolidated net leverage ratio   4.25              
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending September 30, 2019 [Member] | Minimum [Member]                  
Debt Instrument [Line Items]                  
Consolidated fixed charge coverage ratio   1.50              
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending December 31, 2019 [Member] | Maximum [Member]                  
Debt Instrument [Line Items]                  
Consolidated net leverage ratio   4.00              
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending March 31, 2020 [Member] | Maximum [Member]                  
Debt Instrument [Line Items]                  
Consolidated net leverage ratio   3.75              
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending June 30, 2020 [Member] | Maximum [Member]                  
Debt Instrument [Line Items]                  
Consolidated net leverage ratio   3.50              
Second Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending September 30, 2020 [Member] | Maximum [Member]                  
Debt Instrument [Line Items]                  
Consolidated net leverage ratio   3.25              
Second Amendment, Amended And Restated Credit Agreement [Member] | Each Fiscal Quarter Ending Thereafter [Member] | Maximum [Member]                  
Debt Instrument [Line Items]                  
Consolidated net leverage ratio   3.00              
Third Amendment, Amended And Restated Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity     $ 65,000,000.0   $ 65,000,000.0        
Payment of debt issuance costs     $ 100,000            
Third Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending September 30, 2019 [Member] | Maximum [Member]                  
Debt Instrument [Line Items]                  
Consolidated net leverage ratio     4.60   4.60        
Third Amendment, Amended And Restated Credit Agreement [Member] | Fiscal Quarter Ending September 30, 2019 [Member] | Minimum [Member]                  
Debt Instrument [Line Items]                  
Consolidated fixed charge coverage ratio     1.10   1.10        
First Amendment, Amended And Restated Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity                 $ 115,000,000.0
Amended And Restated Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Interest rate increase (decrease) (percent)         2.00%        
Quarterly commitment fee on the average daily unused portion (percent)         0.50%        
Term Loan [Member] | Second Amendment, Amended And Restated Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Payment for debt prepayment $ 5,000,000 $ 7,500,000              
Letters of Credit [Member] | Second Amendment, Amended And Restated Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity   $ 35,000,000.0              
Letters of Credit [Member] | Third Amendment, Amended And Restated Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity     $ 25,000,000.0   $ 25,000,000.0        
Revolving Credit Facility [Member] | Amended And Restated Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Letters of credit outstanding     $ 20,600,000   $ 20,600,000        
Revolving Credit Facility [Member] | Amended And Restated Credit Agreement [Member] | LIBOR [Member]                  
Debt Instrument [Line Items]                  
Interest margin         3.25%        
Covenant Term 5 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | Maximum [Member]                  
Debt Instrument [Line Items]                  
Consolidated net leverage ratio   3.50              
Covenant Term 5 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | Minimum [Member]                  
Debt Instrument [Line Items]                  
Consolidated net leverage ratio   3.00              
Covenant Term 6 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Increase in consolidated net leverage ratio   0.25%              
Increase in commitment fee percentage   0.05%              
Covenant Term 6 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | Maximum [Member]                  
Debt Instrument [Line Items]                  
Consolidated net leverage ratio   4.00              
Covenant Term 6 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | Minimum [Member]                  
Debt Instrument [Line Items]                  
Consolidated net leverage ratio   3.50              
Covenant Term 7 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Increase in consolidated net leverage ratio   0.25%              
Increase in commitment fee percentage   0.05%              
Covenant Term 7 [Member] | Second Amendment, Amended And Restated Credit Agreement [Member] | Minimum [Member]                  
Debt Instrument [Line Items]                  
Consolidated net leverage ratio   4.00              
Forecast [Member] | Third Amendment, Amended And Restated Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity           $ 35,000,000.0 $ 45,000,000.0 $ 55,000,000.0