SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Provision for income taxes	$ 1,620	$ 3,166	$ 7,013	$ 8,141
Effective Income Tax Rate Reconciliation, Percent	28.20%	35.00%	29.10%	35.10%
Adoption of ASU 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Tax rate excluding ASU 2016-09 adoption			33.00%
Provision for income taxes			$ 1,000
Effective Income Tax Rate Reconciliation, Percent			29.10%