DISCONTINUED OPERATIONS DISCONTINUED OPERATIONS - Balance Sheet Disclosures (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current assets	$ 941	$ 79,530
Total non-current assets	0	13,901
Total current liabilities	115	51,952
Total non-current liabilities	0	6,210
RTM | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash	0	15,460
Accounts receivable	0	60,333
Prepaid and other current assets	941	3,737
Total current assets	941	79,530
Property and equipment, net	0	6,251
Deferred tax assets, non-current	0	6,080
Other assets, non-current	0	1,570
Total non-current assets	0	13,901
Total assets	941	93,431
Accounts payable	0	5,764
Accrued expenses and other current liabilities	115	39,108
Short-term borrowings	0	7,080
Total current liabilities	115	51,952
Total non-current liabilities	0	6,210
Total liabilities	$ 115	$ 58,162