UNAUDITED INTERIM INFORMATION (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Oct. 01, 2016
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption increase (decrease)	$ (964)
Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption increase (decrease)	$ 964
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets		$ (6,600)
New Accounting Pronouncement, Early Adoption, Effect | Retained Earnings | Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption increase (decrease)		6,600
Actual forfeiture versus the previously estimated rate | New Accounting Pronouncement, Early Adoption, Effect | Retained Earnings | Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption increase (decrease)		(1,000)
Actual forfeiture versus the previously estimated rate | New Accounting Pronouncement, Early Adoption, Effect | Paid-in Capital | Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption increase (decrease)		$ 1,000