Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT - Company Borrowings (Details)

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LONG-TERM DEBT - Company Borrowings (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Principal balance on borrowings $ 162,405 $ 165,203
Portion due with one year (18,317) (2,058)
Unamortized debt issuance costs (1,320) (1,712)
Unamortized discount (936) (1,216)
Long-term debt 141,832 160,217
7.750% Senior Notes (excluding unamortized discount)    
Debt Instrument [Line Items]    
7.750% Senior Notes (excluding unamortized discount) 144,088 144,828
Senior secured revolving credit facility    
Debt Instrument [Line Items]    
Principal balance on borrowings 0 0
Promissory notes    
Debt Instrument [Line Items]    
Principal balance on borrowings 18,317 19,980
Other    
Debt Instrument [Line Items]    
Principal balance on borrowings $ 0 $ 395