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OTHER CURRENT LIABILITIES (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Other current liabilities      
Unfunded cash account balances $ 6,060   $ 4,932
Lease obligation liabilities 12,255 $ 16,700 0
Other 2,095   2,098
Total $ 20,410   $ 7,030