RELATED PARTY TRANSACTIONS (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) ft²	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) ft² item	Jun. 30, 2014 USD ($)
Members of Management Holding Noncontrolling Interests
RELATED PARTY TRANSACTIONS
Area of property leased (in square feet) | ft²	37,000		37,000
Minimum lease term			15 years
original annual rent expense			$ 300
Annual rent			$ 377
Number of terms for which the lease can be renewed | item			3
Lease term under each renewal			5 years
Lease rent paid	$ 94	$ 85	$ 188	$ 170
Operating expenses related to lease	25	34	53	64
Affiliates of Controlling Stockholders
RELATED PARTY TRANSACTIONS
Lease rent paid	$ 27	$ 28	$ 71	$ 66