Annual report pursuant to Section 13 and 15(d)

LEASE AGREEMENTS - Rent Expense, Net (Details)

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LEASE AGREEMENTS - Rent Expense, Net (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
LEASE AGREEMENTS      
Rent expense under operating lease $ 6,000 $ 6,000 $ 6,900
Sublease income $ 5,210 $ 5,100 $ 8,000