ACCOUNTING PRONOUNCEMENTS ACCOUNTING PRONOUNCEMENTS (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (Decrease) in Prepaid Expense and Other Assets	$ 582	$ 1,080
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 39,069	15,801	$ 22,006	$ 22,511
Accounting Standards Update 2016-18 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (Decrease) in Prepaid Expense and Other Assets		247
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		$ 942		$ 1,189