BORROWING ARRANGEMENTS (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended	12 Months Ended
	Jul. 29, 2014	Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2013	Dec. 31, 2014
Line of Credit Facility [Line Items]
Issuance cost for credit facility				$ 2,100
Line of Credit Facility, Fair Value of Amount Outstanding	$ 90,000	$ 55,000	$ 55,000		$ 75,000
Interest Expense, Debt		314	679
Short-term Debt		$ 7,428	7,428		$ 7,260
Repayments of Debt			$ 7,738
Long-term Debt
Line of Credit Facility [Line Items]
Interest rate charged for borrowing	1.25%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Credit facility in December 2013				300,000
Maximum amount to be withdrawn				$ 250,000