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LONG-TERM DEBT AND CREDIT AGREEMENT Carrying Value of Long Term Debt (Tables) - USD ($)
 12 Months Ended
May 13, 2019
Jan. 22, 2019
Dec. 15, 2017
Dec. 31, 2020
Jun. 15, 2015
Debt Instrument [Line Items]          
Extinguishment of Debt, Amount $ 74,000,000.0 $ 3,900,000 $ 2,000,000.0 $ 16,200,000  
Schedule of Long-term Debt Instruments [Table Text Block]      
Long-term debt consisted of the following (in thousands):
December 31, 2020December 31, 2019
Term loan, net of unamortized debt issuance costs of $2,579 at December 31, 2020 and $3,334 at December 31, 2019, respectively$198,629 $200,105 
Notes, net of unamortized original issue discount and debt issuance costs of $0 at December 31, 2020 and $680 at December 31, 2019, respectively— 28,187 
PPP Loan7,800 — 
Other long-term debt1,271 1,296 
Total debt207,700 229,588 
Less: current portion4,941 30,554 
Total long-term debt$202,759 $199,034 
  
Schedule of Maturities of Long-term Debt [Table Text Block]      
The following table summarizes the maturities of our borrowing obligations as of December 31, 2020 (in thousands):
Fiscal YearTerm LoanPPP LoanOther Long-Term DebtTotal
2021$4,781 $— $160 $4,941 
20226,375 7,800 172 14,347 
2023190,052 — 184 190,236 
2024— — 197 197 
2025— — 212 212 
Thereafter— — 346 346 
Total before unamortized discount
201,208 7,800 1,271 210,279 
Less: unamortized discount and issuance costs2,579 — — 2,579 
Less: current portion of long-term debt
4,781 — 160 4,941 
Total long-term debt$193,848 $7,800 $1,111 $202,759 
  
Debt Instrument, Discounted Repurchase Amount $ 982.5        
Debt Instrument, Repurchased Face Amount         $ 1,000